Instruments [Meriam]

8/2/2019 Instruments [Meriam]

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MANOMETERS - LIQUIDFILLED AND DIGITALBELLOWS DP GAUGESBOURDON P GAUGES

DIGITAL P GAUGESSMART GAUGES

SMART TRANSMITTERS

MICROMANOMETERSMART MANOMETER

MERICALMERICAL II

LAMINAR FLOWELEMENTS / SYSTEMS

Introduction

Since 1911 Meriam products have been used around the world in applications as diverse as chemical processing,

oil drilling rigs, respiratory therapy and laboratory experiments. Originally a family run business, Meriambecame a Scott Fetzer Division in 1969. Other divisions in the Scott Fetzer Corporation include Kirby VacuumCleaner, World Book, Campbell Hausfeld, Adalet and several others. Since 1986, Scott Fetzer is a whollyowned subsidiary of Berkshire Hathaway.

Today, Meriam offers many more industrial instruments than ever before, most with versatility not availableelsewhere. With design, manufacturing and application support headquartered in Cleveland, Ohio, Meriamsability to solve measurement problems is extensive and our technical data is yours for the asking.

This brochure will provide an overview of the Meriam product groups. For more information on specificproducts, request our Product Bulletins containing detailed data. Product Bulletins are available directly fromMeriam or from our field representatives conveniently located throughout the United States and the world.We invite your inquiries and are ready to help in solving your measurement and calibration problems.

P= Pressure DP= Differential Pressure

MeasurementsElements

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Meriam Instrument is a leading manufacturer of instrumentation for the precise measurement of flow, pressureand level. As shown below, the product line includes primary elements and indicators to serve both calibrationand process measurement applications for pressure, flow and level applications.

DPP gauge

P vacuumP absoluteGas Flow

CALIBRATION& TEST

DPP gauge

P vacuumP absolute

PROCESS

PRESSURE

MANOMETERSBELLOWS DP GAUGES

SMART GAUGESSMART TRANSMITTERS

LAMINAR FLOWSYSTEMS, FLOPAC,

SMV TRANSMITTERS

Indicators

DPP gauge

P absolute

FLOW SYSTEMS

LAMINAR FLOW ELEMENT

ACCUTUBE AVERAGING

PITOT

ORIFICE PLATES & FLANGESPROCESS

FLOW

MeasurementsMeasurement Type

MANOMETERSBELLOWS DP GAUGES

SMART GAUGESSMART TRANSMITTERS

Indicators

DPP gauge

DIRECT HEAD ON VENTEDTANKS

BUBBLER SYSTEMS FORVENTED OR PRESSURIZED

TANKS

PROCESSFLOW


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Meriam Product Groups

Table of Contents

Introduction

Table of Contents

Meri-Cal II

Portable, multifunction, multi-sensor Calibrator for pressure transmitters. 0.025% F.S. accuracy.

Sensor ranges from 20" H2O to 2000 PSIG, 2000 mm Hg Abs, 50 volts/mA. Data Logging option.

Meri-Cal (original)

Portable, multifunction Calibrator for pressure transmitters. 0.05% Reading, 1 count accuracy.

Sensor ranges of 200" H2O and 2000" wc, 30 volts/mA

Smart Manometer models 350,351 and Precision Absolute Manometer model 355

Portable,Digital Manometer, 0.025% FS accuracy. Ranges 20" H2O to 2000 PSIG, 2000 mm Hg A

Portable Digital ManometerPortable Electronic Manometer, 0.25% Reading, 5 counts. Ranges 20" H2O to 100 PSI, 1500mm Hg A

Smart Pressure Gauges

0.05% FS accuracy for measuring gauge pressure, vacuum and differential pressure from 20"

H2O to 2000 PSIG or absolute pressure from 0 to 2000 mm Hg Absolute.

Minigauge Digital Pressure Gauge

2.75" diameter digital pressure gauge, 1.0% FS accuracy. Pressures from 50 to 10,000 PSIG

Merigauge Digital Pressure Gauge

3.75" diameter digital pressure gauge, 0.25% FS or optional 0.10% FS accuracy. Pressures from

vacuum to 6000 PSIG. Output options include two SPDT relays and / or 4-20 mA / 1-5 VDC

1500 Smart Transmitter

0.025% FS accuracy, RS485 digital and analog (V or mA) output selections. DIN rail or flange

mount. Pressure, differential or absolute pressure from 20" H2O to 2000 PSIG, 2000 mm Hg A Bellows Type Differential Pressure Indicators and Indicating Switches

0.75% FS accuracy to indicate differential or gauge pressure up to 500 PSID. One or two switches

available with or without explosion-proof enclosure. Several wetted material options

Bourdon Tube Pressure Gauges

2 12" to 4 12" diameter pressure gauges, lower or back mount stems, vacuum to 15,000 PSIG

Manometer Accessories

Pressure / vacuum sources and variators, Sight Feed Bubblers, Line Traps, Check Valves, Seal Pots

Manometers

Liquid filled U-tubes, Well types, Inclined tubes and Micromanometers for measuring pressure and

vacuum. SWP to 500 PSI. Accuracy is typically 12 of smallest graduation.

Laminar Flow Elements

Accuracy of 0.86% of Reading for flow measurement of 1 SCCM to 2,250 SCFM with turn-downof 20:1 or more. Special models are available to 15,000 SCFM. Improved accuracy options.

Accutube Flow Sensors

Accuracy of 1% Reading, repeatability of 0.1%. For pipe sizes 12" to 20. In-line, insertion, flange

mount, wet tap, direct transmitter mount, integral RTDs. For liquid, gas and steam measurement.

Orifice Plates & Orifice Flanges

Accuracy of 1% FS with 4:1 turn down. General-purpose measurement of liquid, gas and steam

Flow Measurement Systems

- LFS-1 (Laminar Flow System-1) for Laminar Flow Elements (LFEs). Automated measurements

of gas flow with 0.6% Reading accuracy over 10:1 turn down; 0.7% over 20:1 turndown.

- FLOPAC digital flow system for LFEs uses customers PC for calculations and data storage

- SMV Transmitter Flow Systems for direct mounting to Accutube averaging pitot tubes takes

the place of individual P and DP Transmitters and flow computer. Convenient cost saver.


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Approvals: CE compliant (Optional)

Display: 4 line x 20 character alpha-numeric 5 fulldigit resolution

NIST traceability: NIST certificate supplied for allmodels.

Power: 9-volt alkaline battery with user enabledautomatic shut-off.

Optional 9 volt lithium batteries can also be used andare recommended below 32 F (0 C).

Temperature:Storage: -40F to 140F (-40 to 60C)Operating: 23 F to 122F (-5 to 50C)

Process connection: 1/8 female NPT, 316ss

Media compatibility: Non-isolated sensor (DN) forclean, dry, non-corrosive gases. Isolated sensor (GIand AI) for fluids compatible with 316ss.

Pressure limits: Twice range on GI/AI units. Twicerange on DN units when pressurized on high sideonly and 150 PSI (10.5 Kg/cm2) static when appliedto both sides of the sensor simultaneously.

Enclosure: 30 ounces. (8.5L x 5.2W x 3.0D) ABSplastic case

Accuracy: Pressure sensor 0.05% of F.S. or

optional 0.025% of F.S.Electrical measurements 0.025% of F.S. Accuracyincludes all effects of linearity, repeatability, hysteresisand temperature over the range 23F to 122F

Meri-Cal IIModel 3600 & 3610 Pressure Calibrator

Model 3600 Meri-Cal IIis a microprocessorbased pressure calibrator with 5 digit resolutionand NIST traceability. Two pressure sensors andone electrical sensor installed in the Meri-Cal IIwill allow measurement of differential and staticpressure, plus current and voltage in one unit.Any two of these measurements are displayedon a 4 line by 20 character alphanumeric display,making calibration of transmitters andtransducers easy.

The Model 3610 Meri-Cal IIincorporates aconvenient Data Logging mode and on-board

memory to provide calibration documentation atthe stroke of a key. Calibration procedures canbe set up quickly using the Windows 95 DataLogging Program. Up to 20 PC Calibration filesof up to 20 points each can be downloaded froma PC. This allows the 3610 to prompt the userwith required calibration points. Another 20Manual Calibrations files can be stored directlythrough the keypad.

Specifications

3600 Standard Features

Selectable Engineering Units - PSI, inches H2O (4C,20C, and 60F references), kg/cm2, Kilopascals, mBars,Bars, mm Hg, inches Hg, cm H2O, user definable units.

Auto Shut-off - occurs after 10 minutes without anew keystroke. User can disable this feature.

DAMPING (averaging) - selectable from 0.1 to 25seconds to dampen pulsation and stabilize the display.

MIN/MAX capture - minimum and maximum measuredvalues are captured. Capture speed is equal to the selecteddamping rate.

HOLD - toggle on/off function freezes display.

ZERO - provides automatic re-zeroing of the sensors.

Soft Carrying Case with adjustable shoulder strap.


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Meri-Cal IIModel 3600 & 3610 Pressure Calibrator

Ordering Information

MERI-CAL II (includes current / voltage sensor):3600 Select one or optionally two sensors fromselection below. Order same accuracy for unitswith two sensors.

3610 Adds onboard memory card and PC Datalogging to the model 3600(Requires software andcable- see accessories)

To Order a Meri-Cal II with 200 Differential and 2000 PSI sensor with .025% accuracy. The order codeis as follows: 3600-DN0200-GI2000-025 (add -025 extension for accuracy).

Consult factory or your local Meriam Representative for Pricing

SENSORS:.05% DN0200 0-200 H2O Differential

DN2000 0-2000 H2O DifferentialGI0020 0-20 PSI GaugeGI0200 0-200 PSI GaugeGI2000 0-2000 PSI GaugeAI2000 0-2000 mm Hg Absolute

.025% DN0200 0-200 H2O DifferentialDN2000 0-2000 H2O DifferentialGI0020 0-20 PSI GaugeGI0200 0-200 PSI GaugeGI2000 0-2000 PSI GaugeAI2000 0-2000 mm Hg Absolute

.1% DN0020 0-20 H2O Differential

MERI-CAL II MODEL 3610 DATA LOGGING andCOMMUNICATIONS SOFTWARE for PCs

The Data Logging and Communications Software for the Meri-Cal II is Windows 95 compatible.Features for the program include:

SET TIME button to synchronize the Meri-Cal II real time clock with the PCs. DATA ACQ provides automated data acquisition (10Hz rate) using the PC with the Meri-Cal II.

The Meri-Cal II Model 3610 will function as a data logging calibrator for pressure and electrical signalin the PC Data Logging Mode.

CREATE CAL FILE facilitates the uniform creation of individual calibration files for each transmitteror transducer ID number. After entering a Serial/Tag # of up to 15 characters, Channel 1 and 2Sensors are defined by clicking on the sensor type and desired units for each. The software allows upto 20 PC Calibration and 20 manual (20 points each) calibration files to be uploaded to the 3610.

SEND PC CAL FILES downloads selected files to the Meri-Cal II. RECEIVE PC (and MANUAL) CAL FILES uploads stored calibration data from the Meri-Cal II to the PC. PRINT commands allow printing of calibration data previously uploaded to the PC.

The Meri-Cal II guides the user through the calibration procedure.The PC interface option allows for the display of PREV: the mostrecent as left data, FOND: the present as found data, and NOML:The desired present point to calibrate as programmed throughthe PC interface. With a simple keystroke this information is

stored in non-volatile memory. The Meri-Cal II is then interfacedwith the host PC for long-term information storage and printingof calibration certificates.

3610 Features (Additional to 3600)

Memory - Non-volatile data-logging memory for 40calibration files with up to 20 points per file.

PC Data Logging Mode - prompts user to follow calibr-tion procedures downloaded from a PC (RequiresOptional Software). Stores AS FOUND and AS LEFTdata in memory.

Manual Data Logging Mode - field defined data logging

for transmitter or transducer calibrations or documenta-tion of local indicators or flow computers.

DB-9 serial connector - used for downloadingcalibration files from a PC to the 3610 and for uploadingstored calibration results to the PC (Requires OptionalSoftware)


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Approvals: CSA certification for intrinsic safety usein Class 1, Groups A, B, C and D areas. CE andCENELEC approvals. (Both Optional)

Display: 8 digit (4 pressure or DP and 4 voltage orcurrent) LCD type with .3" high (7.6 mm) digits.

NIST traceability: NIST certificate supplied for allmodels.

Power: NI-CAD Rechargeable, Minimum of 40 Hrs@ 70F (21C); 20 Hrs @ -20F (-29C)

Temperature:Storage: -40F to 140F (-40C to 60C)Operating: -20F to 122F (-6.7C to 50C)Effect: None within the calibrated range of -4 to 104F

Process connection: 1/8" OD Presto-lok

Enclosure: 1.1 pounds (0.5 kg) 4 x 7.5 x 1.9

(102mm x 191mm x 48mm). Impact resistantABS material.

Pressure limits: Twice range on Gauge (LP) units.Twice range on Differential (DP) units when pressur-ized on high side only and 150 PSI (10.5 Kg/cm2)static when applied to both sides of the sensorsimultaneously.

Media compatibility: Non-isolated sensor for clean,dry, non-corrosive gases.

Auto Zero: A push of a button automaticallyestablishes zero. There is no need to computecompensation factors for local gravity, temperature,or head difference due to the location of the tester vs.the unit under test.

Engineering units: in H2O at 20C, cm H2O, PSI,in Hg at 0C, mm Hg, Kg/cm2, kPa, mBar anduser scaled.

Resolution: Auto-ranging for optimal accuracy andresolution of the display for both pressure andelectrical inputs.

Electrical Measurement:

Voltage: 0 to 30 Vdc

Current: 0 to 30 mAdc Accuracy: Pressure: 0.1% of reading, 1 count,

Voltage/Current: 0.1% of reading, 2 counts.Optional 0.05% of reading, 1 count on pressuresensors. Accuracy includes the combined effects oflinearity, hysteresis, repeatability and temperatureover the calibrated range.

Meri-Cal Digital Manometer/Calibrator

The Meri-Cal is a portable digital manometer /calibrator for pressure and differential pressuremeasurement. It features high accuracy andrugged design that brings laboratory test andcalibration capability to the field.

Meri-Cals display simultaneously indicatespressure (or differential pressure) and electronictransducer/transmitter output in any of eightkey selectable engineering units. Meri-Calcontinues to provide the most cost effectiveand useful method of precise measurements.

Standard Features on the Meri-Cal Digital Manometer/Calibrator

INCHES CM INCHES MMMODEL* H20 H20 PSIG HG HG KG/CM2 kPa mBarLP200I 200.0 508.0 7.21 14.68 373.0 0.507 49.70 497.0DP200I 200.0 508.0 7.21 14.68 373.0 0.507 49.70 497.0

LP2000I 2000. 5080. 72.10 146.8 3730. 5.070 497.0 4970.

DP2000I 2000. 5080. 72.10 146.8 3730. 5.070 497.0 4970.

LP models measure gauge pressure only. DP models can be used to measure differential pressure, gauge pressure and vacuum.* For CSA approved models change the I suffix to C For CENELEC approved models change the I suffix to E


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Smart Manometer

Approvals: CE compliant and CSA Intrinsically safe(Optional)

Display: 5 significant digit LCD (0.25" high) 2 line x 16alphanumeric characters

NIST traceability: NIST certificate supplied withall models.

Damping rates: User selectable from 0.1 to 25 seconds

Power: 9-volt alkaline battery with user enabledautomatic shut off. 9 volt Lithium battery is reco-mmended for use below 32F (0C)

Temperature:Storage: -40F to 140F (-40 to 60C)Operating: 23F to 122F (-5 to 50C)

Min/Max capture - capture speed is equal to theselected damping rate

Process connection 1/8" female NPT, 316ss

Media compatibility: Non-isolated Differential sensor(DN) for clean, dry, non-corrosive gases. IsolatedGauge and Absolute sensor (GI and AI) for fluidscompatible with 316ss.

Pressure limits: Twice range on Gauge and Absolute(GI and AI) units. Twice range on Differential (DN)units when pressurized on high side only and 150PSI (10.5 Kg/cm2) static when applied to both sidesof the sensor simultaneously.

Engineering units: inches of H2O (with three choicesof reference temperature), PSI, mm of Hg, inches of

Hg, mBars, Bars, kPa, kg/cm2

, cm of H2O and userselectable scaling.

Contrast adjustment: Adjusts display for easier viewing

Enclosure: 14 ounce (6.5" X 3.6" X 2.25") ABS plastic case.

Auto Shut-Off: user selectable shut-off time period.

Digital Manometer

Meriam Instrument's 350 Series SmartManometers are the first pressure measur-ing instruments with accuracy of 0.025%of F.S. at truly low prices. They are micro-processor-based pressure sensing devicesthat can measure gauge, differential,absolute or vacuum pressure. The displayscan read out in any of eleven engineeringunits and can also be scaled to special userunits for pressure. Differential models offera flow function to display square root flow

rate in user defined units. An adjustabledamping feature minimizes the effects ofpulsating pressures. A Min/Max functioncaptures the extremes of pulsating or othervarying pressure signals and a Hold buttoncan freeze the display at any point of interest.

Standard Features on the 350 Series Digital Manometer Family

Model 350 Smart Manometer Test Gauge

Accuracy *: 0.05% of F.S. 0.1% of F.S. 20" H2O differential range only

Range: 20" H2O, 200" H2O and 2000" H2O DP 20 PSIG,

200 PSIG and 2000 PSIG Gauge 2000 mm Hg Absolute

Model 351 Smart Manometer Calibrator

Accuracy *: 0.025% of F.S.

Range: 200" H2O, 200" H2O and 2000" H2O 20 PSIG,200 PSIG and 2000 PSIG 2000 mm Hg Absolute

* Includes the combined effects of temperature, linearity,repeatability, hysteresis and resolution.


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Precision Absolute Manometer

355 Precision Absolute Manometer

Meriams model 355 Precision Absolute Manometerputs calibration bench accuracy in a portable,handheld unit. The pressure sensor is all 316ssallowing it to be used with liquids, gases andcorrosives compatible with 316ss. This combinationof accuracy and fluid compatibility makes the 355ideal for test or process applications.

The model 355 has a programmable altitude func-tion that allows the user to enter the site altitudeabove sea level in feet or meters. This allows theuser to chose between displaying local barometric

pressure or pressure corrected to sea level. Userset altitude or altitude based on U.S. StandardAtmosphere of 1962 can be displayed. The altitudefunction used with the Min/Max and Tare makesthe model 355 useful as a surveyors tool byaccurately measuring changes in altitude.

Approvals: CE compliant and CSA Intrinsicallysafe (Optional)

Display: 5 significant digit LCD (0.25 high)2 line x 16 alphanumeric characters

NIST traceability: NIST certificate supplied forall models.

Power: 9-volt alkaline battery with user enabledautomatic shut off. 9 volt Lithium battery is recom-mended for use below 32F (0C)

Temperature:Storage: -40F to 140F (-40 to 60C)

Operating: 23 F to 122F (-5 to 50C) Process connections: 1/8 female NPT, 316ss.

Enclosure: 14 ounce (6.5 X 3.6 X 2.25) ABSplastic case.

Media compatibility: Isolated AI sensor for fluidscompatible with 3l6ss.

Pressure limits: 4000 mm Hg Abs (AI0900 and AI2000)

Tare: Sets display to zero to allow measurement ofvacuum, gauge pressure or change in altitude.

Min/Max capture - capture speed is equal to theselected damping rate

Damping rates: User selectable from 0.1 to 25 seconds

Selection of engineering units: mm Hg, PSI, in. Hg,mbar, Bar, kPa, Torr.

Altitude: Displayed in feet or meters. Can be set byuser based on map or trig marker information.Standard altitude uses U.S. Standard Atmosphere of1962 data.

Contrast adjustment: Adjusts display for easierviewing

Accuracy:355-AI0900

0.02% F.S. (F.S.=900 mm Hg abs)355-AI2000

0.015% F.S.* from 0-1000 mm Hg A0.025% F.S.* from l000-2000 mmHg A*(F.S. = 2000 mm Hg Abs)

Standard Features on the Model 355 Precision Absolute Manometer

355 Ordering Information

355-AI0900 0-900 mm Hg Abs. (Includes soft vinyl carrying case)355-AI2000 0-2000 mm Hg Abs. (Includes soft vinyl carrying case)


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MODEL Range Units ResolutionD0020IW 0-20 in H2O 0.01

D0200IW 0-200 in H2O 0.01

D1000IW 0-1000 in H2O 0.1

D00l0P 0-10 psi 0.001

D0030P 0-30 psi 0.01

D0l00P 0-100 psi 0.01

D0050MB 0-50 mbar 0.1

D0500MB 0-500 mbar 0.1

D2000MB 0-2000 mbar 0.1

D0007B 0-7 bar 0.001

A0030P 0-30 psia 0.01

A1500MH 0-1500 mm Hg A 0.1A0060IH 0-60 in Hg A 0.01

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Smart Manometer AccessoriesSeveral accessory items are available for Smart Manometersand Digital Manometers to help complete your pressure cali-bration needs. Multi-bay carrying cases provide convenient

portability and organization of fittings, hand pumps, tubingand up to two manometers.

Portable Digital Manometer

Display: 4-1/2 digit LCD with 0.4-inch high digit.LOW BATTERY indication.

NIST traceability: NIST certificate supplied as anoption for all models.

Power: Field replaceable 9 volt. Over 100 hours

continuous use at 20C (68F) with recommendedalkaline battery.

Power: 9-volt alkaline battery, 9 volt Lithium batteryis recommended for use below 32F (0C)

Temperature:Operating: 0 to 40 C (32 to 104 F)Storage: -40 to 140 C (-40to 140F)0.01% FS per degree C (Absolute: 0.030% FSper degree C)

Pressure Connections: 1/8 inch FNPT (adaptersavailable).

Pressure Limits: Not to exceed 3 times full scale or125 psi whichever is less.

Media compatibility: Non-isolated sensor for clean,

dry, non-corrosive gases. Enclosure: 8 ounce (6.5 X 3.2 X 1.2) impact

resistant ABS plastic case and soil resistant polycar-bonate labeling.

Zero Function: Easy to use front panel zeroadjustment knob.

Accuracy: 0.25% of reading 5 digits @ 22C(includes the combined effects of linearity,repeatability, and hysteresis)

Standard Features on the Portable Digital Manometer

Portable Digital Manometer

Ordering Information

H2O and Hg ranges are supplied referenced to 20 C (68 F) and 0 C (32 F) respectively.

Description Part Number

Dual Bay Carrying Case(see photos at left) A900016-50001Single Bay Carrying Case for Digital Mano A34957Pressure Hand Pump 961PVacuum Hand Pump with vernier variator 961VPressure Vacuum Variator (lab use) 971A3Connector Kit includes fittings, tees, tubing A34386

and reducers to fit up to mostpressure instruments

One valve, push to read equalizing manifold A900020-90772for differential models only


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Meriam Instruments 2100 Smart Gauges are micro-processor based pressure sensing devices that can

be used to measure pressure, differential pressure(air or gas flow), or hydrostatic level. There arethree models in the series: the 2110P is principallyfor pressure measurements, the 2110L is for levelmeasure and the 2110F is for gas flow measurement.These three units share the same hardware, but havedifferent software programs based on the function.

Manometer Replacement2100 Smart Gauges can replace Manometers whenrestrictions on indicating fluids are a problem. Twoapplications are significant. One application ishydrostatic level measurements using bubblers.

The 2100 series is a good replacement because itmaintains local indication, adds outputs and uti-lizes most of the existing system of bubblers andother components. Gauge (GI) models may bedirectly connected to non-pressurized tanks fordirect head measurements. The other applicationis gas or air flow metering. Examples are heat

treating, aeration, purge and cooling. The 2100 Smart Gauges maintain local indication, add outputs and keepreplacement costs down. With external corrections for pressure and temperature, the gauges can also measuremass flow.

Pressure Switch In this application the 2100 has two distinct advantages over mechanical gauges. First, theactual switching point can be precisely set. A user can "see" the set point without having to make trial anderror adjustments. Second, it reduces excessive dead band or hysteresis a common complaint about mechanicalgauges. The dead band in the 2100 is user selectable for exact control.

Absolute / Vacuum Measurement Absolute models give resolution to 0.1 mm Hg. Vacuum units have 0.001"Hg resolution over the entire vacuum range. The combination of resolution, 0.05% of full scale accuracy, out-puts and low price make the 2100 a good choice for customers in research and development laboratories andprocess measurement.

2100 Series Smart Gauge

Approvals: CSA Intrinsically Safe on battery models.CE mark available on battery and 4-20 mA units.

NIST Traceable: NIST certificate supplied with allmodels.

Media compatibility: Non-isolated Differential sensor(DN) for clean, dry, non-corrosive gases. IsolatedGauge and Absolute sensor (GI and AI) for fluidscompatible with 316ss.

Process connection: 1/8" female NPT, 3l6ss

Enclosure: 4 lbs, 1/4" DIN (3.8" x 3.8" x 6.5")aluminum enclosure with epoxy finish. Standard unitis NEMA 4X on front panel only. Battery and 4-20 mAunits are NEMA 4X throughout.

Backlight

Damping: selectable from 0.1 to 50 seconds.

Adjustable Deadband: on SPDT relays

Selectable Timeout: conserves battery

Lockout: prevents inadvertent resetting of gaugeconfiguration.

Temperature:Storage: -40F to 140F (-40 to 60C)Operating: 23 F to 122F (-5 to 50C)

Pressure Limits: Twice range on Gauge and Absolute(GI and AI) units. Twice range on Differential (DN)units when pressurized on high side only 20x on 20"sensors when pressurized on high side only and 150PSI (10.5 Kg/cm2) static when applied to both sidesof the sensor simultaneously.

Display: 4 1/2 digit LCD, 0.6" high (15.24mm)

Power/Outputs: Standard unit has selectable 110VAC 50/60 Hz, 220 VAC 50/60 Hz, or 12 to 28 VDCpower. Included are an RS-232C and two set pointrelays rated 1 amp resistive @24 VDC, .5 amp resis-tive @ 115 VAC. Options: Lithium battery unit withfield replaceable battery board and user defined autoshut-off. 12 to 28 VDC power for 4-20 mA and RS-232output or 1-5 VDC and RS-232.

Accuracy: 0.05% of Full Scale( 0.1% FS on 20"H2O Sensor). This includes the combined effects oflinearity, repeatability, hysteresis and temperature

Standard Features on the 2100 Series Smart Gauge Family


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Meriam Instruments 21l0P Smart Gauge is a microprocessor based, programmable, pressure sensing device.The ranges available allow for measurement of pressure, differential pressure, vacuum and absolute pressure.All units are programmed to allow easy configuration of the gauge through the front keypad. The AC poweredand 4 to 20 mA units can also be configured through the RS-232C serial communications port.

The SPDT relays on the AC powered models are an ideal choice for process control functions. The 4 to 20 mAoutputs on the 24 Vdc model allows the 2110P to be used in both control and recording applications. Bothmodels also have RS-232C communications for high level control and data logging capabilities. Typical appli-cations include use as a test bench gauge, tank level measurement, gas flow measurement and leak testing.


Model 2110P for DP, P gauge, P absolute, Vacuum

Meriam Instruments 2110L Smart Gauge is a microprocessorbased, programmable, pressure sensing device. It is designed todisplay tank level in volumetric or mass units based on thehydrostatic head pressure of the fluid in the tank. The 2110Lcan be used in bubbler systems or for direct head measure-ment on pressurized or vented tanks. It can be configured forlinear tanks such as vertical cylinders or for use on non-lineartanks such as horizontal cylinders and spheres. All units areprogrammed to allow easy configuration of the gaugethrough the front keypad. The AC powered and 4 to 20 mAunits can also be configured through the RS-232C serialcommunications port.

SPDT relays on AC powered units and the 4 to 20 mAoutput on the transmitter models make the 2110L an idealchoice for many level control and recording functions. Bothmodels also have RS-232C communications for additional controland data logging capabilities. The SPDT relays have selectable deadbandsto prevent wear on pumps due to constant cycling.

Selection of engineering units: mm Hg, PSI, in. Hg,mbar, Bar, kPa, in. H2O (20C, 40C, 60F), Kg/cm

2, cm.H2O and user defined.

Range: 20" H2O differential to 2000 PSIG2000 mm HG Absolute

Ordering Information 2110P Smart Pressure GaugeSensor Type:DN0020 0-20"H2ODN0200 0-200" H2ODN2000 0-2000" H2OGI0020 0-20 PSIGI0200 0-200 PSIGI2000 0-2000 PSIAI2000 0-2000 mm Hg

Mounting options:01 Panel Mount (standard)02 2" Pipe Mount03 Portable Handle / Bench Stand

Power/Output options1 110/220 VAC, 24

VDC/RS-232C,andSPDT Relays (Standard)

2 Batteries / No Outputs3 24 VDC /4-20 mA, RS-232C4 Batteries w/I.S. approval5 Batteries w/CE approval6 Code 3 w/CE approval7 24 VDC/ 1-5 VDC, RS-232C,

CE approval

Example: 2110P with 200" H2O Differential pipe mount and Battery Pack 2110P DN0200 02 2

Model 2110L for Bubbler or Head Type Tank Level Measurement

Selection Of Engineering Units: gallons, pounds,cubic feet, liters, percent, kilograms, cubic meters, in.H2O and user defined.

Range:DN: Differential Non-isolated 20", 200", 2000" H2OGI: Gauge Isolated 20 PSIG


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Model 2110F for Flow Indication of DP Primary Elements

Ordering Information 2110L Smart Level Gauge

Sensor Type:

DN0020 0-20"H2ODN0200 0-200" H2ODN2000 0-2000" H2OGI0020 0-20 PSI

Mounting options:

01 Panel Mount (standard)02 2" Pipe Mount03 Portable Handle / Bench Stand

Example: 2110L with 200" H2O Differential pipe mount and 4 to 20 output 2110L DN0200 01 3

Meriam Instruments 2110F Smart Gauge is a microprocessorbased, programmable, differential pressure sensing devicedesigned to display flow rate when used with a head losstype flow element such as Accutube averaging pitot tubes,orifice plates or Meriam Instruments laminar flow elements.The piezoresistive differential pressure sensors are availablein three ranges assuring the best accuracy and resolutionfor an application. The unit calculates flow rate by measur-ing the DP and using it in algorithms with flow coefficients

entered into the unit by the user. All units can be configuredthrough the front keypad. The AC powered and 4 to 20 mAunits can also be configured through the RS-232C serialcommunications port.

SPDT relays on AC powered units and the 4 to 20 mA output on the transmitter models make the 2110F anideal choice for many control and recording functions. Both models also have RS-232C communications foradditional control and data logging capabilities. Typical applications include use as a LFE test bench gauge,air compressor usage monitoring and leak testing.

Engineering Units: Pounds, cubic feet, liters,percent, kilograms, cubic meters, in. H2O anduser defined units. Minutes or hours time

constant can also be displayed

Range:DN: Different Non-isolated 20", 200", 2000" H2O

Sensor Type:DN0020 0-20"H2ODN0200 0-200" H2ODN2000 0-2000" H2O

Mounting options:01 Panel Mount (standard)02 2" Pipe Mount03 Portable Handle / Bench Stand

Example: 2110F with 20" H2O Differential Panel mount and 4 to 20 output 2110F DN0020 01 3

Power/Output options1 110/220 VAC, 24

VDC/RS-232C,andSPDT Relays (Standard)


CE approval

Power/Output options1

110/220 VAC, 24VDC/RS-232C,andSPDT Relays (Standard)


CE approval


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Dimensions

3800 Digital Pressure Gauge

The MINIGAUGE from Meriam Instrument provides digital pressure measurement

at an economical price. Pressure ranges are available from vacuum to 10,000 PSIGat an accuracy of 1 % of Full Scale. One 9-volt alkaline or lithium batterypowers the transducer and the LCD display. The display is a 4.5 digit LCD with0.4" high numerals. Pressing the "Push To Read" key turns the display on for afixed viewing time. Automatic shut-off after the viewing period conserves batterypower. Field calibration is easy to accomplish by adjusting zero and spanpotentiometers located under the back cover plate.

The rugged ABS plastic indicator housing is 2.75 inches in diameter. Wetted compo-nents are 17-4 PH stainless steel for compatibility with many process liquids and gases.Process connection is via a 1/4" MNPT stainless steel stem. Typical applications are test and measurementin the process industries, hydraulics, pneumatics, industrial gases and on OEM equipment.

Pressure RangesModel: & Resolution3800-GI0050PSI 50.00 PSIG3800-GI0100PSI 100.00 PSIG3800-GI0500PSI 500.0 PSIG3800-GI1000PSI 1000.0 PSIG3800-GI1500PSI 1500.0 PSIG3800-GI3000PSI 3000 PSIG3800-GI6000PSI 6000 PSIG3800-GI10000PSI 10000 PSIG

3800-GI00003BAR 3.500 Bars3800-GI00007BAR 7.000 Bars

3800-GI00035BAR 35.00 Bars3800-GI00070BAR 70.00 Bars3800-GI00105BAR 105.00 Bars3800-GI00210BAR 210.0 Bars3800-GI00410BAR 410.0 Bars3800-GI00720BAR 720.0 Bars

3800-GI00003KG 3.500 kg/cm2

3800-GI00007KG 7.000 kg/cm2

3800-GI00035KG 35.00 kg/cm2

3800-GI00070KG 70.00 kg/cm2

3800-GI00105KG 105.00 kg/cm2

3800-GI00210KG 210.0 kg/cm2

3800-GI00420KG 420.0 kg/cm2

3800-GI00730KG 730.0 kg/cm2

Accuracy: 1% of Full Scale at calibrated tempera-ture. Temperature effect: 0.1% per F.

Display: 4.5 digit LCD (0.4" character height), Lowbattery indicator.

Power: One 9 volt alkaline battery included, auto-matic timeout to conserve battery life.

Enclosure: Custom molded ABS plastic housing.

Engineering Units: Available in either PSIG,Bar or kg/cm2. Specify when ordering.

Over-Pressure Limits: Twice the full scale range

Weight: 7 ounces

Certifications: NIST Certificate optional. CE andIntrinsically Safe/CSA pending

Field Calibration:Zero and span adjustment potentiometers areaccessible from the backside of the case.

Media Compatibility: Isolated sensor for liquids orgases compatible with 17-4 PH stainless steel.

Process Connection: 1/4" male NPT

Temperature:Storage: -4 F to 140 F (-20 C to 60 C)Operating: 32 F to 122 F (0 C to 50 C)

3800 MINIGAUGE Models & Ranges


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3900/3910 Digital Pressure Gauge

The MERIGAUGE digital pressure gauge from Meriam Instrument successfully addresses the modern demandsof process pressure measurement. Pressure ranges are available to 6,000 PSIG at standard accuracy of 0.25%of Full Scale and optional accuracy of 0.10% of full scale. A combination gauge that can be used for positivepressure measurements and vacuum measurements is also available. The standard gauge is powered by two 9volt alkaline or lithium batteries. Externally powered units are available. The pressure display is a 4 12" digitLCD with 0.6" high numerals. Each gauge includes 12 field selectable engineering units. The selectable unitsinclude PSIG, feet of water, inches of water, inches of the mercury, Bar, millimeters of mercury, kilopascals anduser configurable units. In addition to numeric pressure indication, visual indication of the pressure is repre-sented by an adjustable vertical bar graph on the left side of the display. Other standard features includeMin/Max query, Zeroing, selectable Damping, selectable program Lock-out, adjustable display shutoff and fieldrecalibration and adjustable display shutoff (for battery powered models). The housing is 304 stainless steel andNEMA 4 rated. Wetted components are 316 stainless steel for compatibility with many process fluids. Processconnection is via a 14" MNPT 316 stainless steel stem.

Typical applications are instrumentation and control in the process industries, hydraulics, pneumatics,industrial gases and OEMs. Options such as panel mounting, 24 Vdc powered units, 4 to 20 mA output,adjustable SPDT relay outputs, and various style diaphragm seals add to the versatility of the MERIGAUGE.

0.25% FS Models Pressure Ranges Options

3900-GI0010-XX-Y-ZZ 0 - 10 PSIG XX= 01: Pipe Mount (battery power)3900-GI0050 " 0 - 50 PSIG 02: Pipe Mount (external power)3900-GI0100 " 0 - 100 PSIG 03: Panel Mount (battery power)3900-GI0500 " 0 - 500 PSIG 4: Panel Mount (external power)3900-GI1000 " 0 - 1000 PSIG Y= 1: Battery Power3900-GI1500 " 0 - 1500 PSIG 2: 24VDC Power (2 wire)3900-GI3000 " 0 - 3000 PSIG 3: 4-20mA output (2 wire)3900-GI5000 " 0 - 5000 PSIG 4: 24VDC, 4-20mA (4 wire)3900-GI6000 " 0 - 6000 PSIG 5: 24VDC, 2 relay outputs3900-VI0050 " Vacuum - 0 - 50 PSIG 6: 24VDC, 2 relays, 4-20mA

7: 24VDC, 1-5 VDC (4 wire) output

8: 24VDC, 2 relays, 1-5 VDCZZ= 01: CE Approval02: CSA/Intrinsically Safe Approval

3900/3910 MERIGAUGE Ordering Information

0.10% FS Models3910-Same pressure ranges and options as 3900


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3900/3910 Digital Pressure Gauge

ACCURACY:3900: 0.25% of Full Scale at calibrated temperature.

3910: 0.10% of Full Scale at calibrated temper-ature. Temperature Effect: All units compensated to 0.01% of F.S. per C.

DISPLAY: 4 12 digit LCD (0.6" high), 0 - 100%vertical bar graph, Unit Indication, Low batteryindicator.

POWER:Options: Two 9 volt alkaline batteries (included).

Lithium batteries for use below 32F (0C) 24VDC or 110 VAC with optional adaptor.

ENCLOSURE: NEMA 4, 304 stainless steel

MEDIA COMPATIBILITY:Isolated sensor for processes compatible with 316SS

PROCESS CONNECTION: 14" male NPT, 316SS

OVER-PRESSURE LIMITS:Twice the full scale range

WEIGHT: 25 ounces.

TEMPERATURE:Storage: -40 F to 158 F (-40 C to 70 C)Operating: 32 F to 140 F (0 C to 60 C)

Specifications

SELECTION OF ENGINEERING UNITS:PSIG, Ft. H2O, In. H2O (60 F, 20 C, 4 C), In.Hg, Bar, mm Hg, kPa, & user selectable units

FIELD RECALIBRATION:Recalibration can be done at any time using anaccurate standard pressure reference.

SHUTOFF TIMER: (available on battery poweredunits) Selectable from off to 50 minutes.

MIN/MAX: Capture and display pressure extremes.

DAMPING: Provides a stable pressure indicationby averaging pressure measurements. Selectablefrom off to 50 seconds.

BARLo & BARHi: A user scalable Bar Graph forvisual indication of any pressure range. Default is0 to100% of full scale range.

Standard Features

24 VDC POWERED UNITS:External powered units for extended gaugeoperation and for gauges with output options.Compliance voltage: 17 VDC to 30 VDC.

Intrinsically Safe (CSA) and CE APPROVAL:Intrinsically Safe/CSA approval for use in Class 1,Division 1, Groups A,B,C,D environments (batteryunits only, others pending). CE approval for use inthe European markets.

4 to 20 mA or 1-5 VDC OUTPUT:Provides remote pressure monitoring. Fullyadjustable throughout the gauge full scale range.

Two wire configuration with a 6 foot pigtail andfour wire configuration available for 4-20 mA.Four wire configuration for 1-5 VDC.

SPDT RELAY OUTPUTS:Provides two adjustable SPDT relays thatcan be integrated in a control circuit to activate anexternal device such as a warning light, valve,solenoid, etc... Adjustable throughout the gauge

full scale pressure range with adjustable deadband.Relay contacts are rated for 0.5 Amp @120 VACand 1 Amp resistive @ 30 VDC.

PANEL MOUNTING: Provides integral panelmounting bracket with rear pressure connection.

DIAPHRAGM SEALS: Various sizes and styles ofdiaphragm seals including threaded, flanged and

sanitary provide gauge to process isolation.Sanitary diaphragm seals are available for foodand pharmaceutical applications.

Options

DimensionsPIPE MOUNT PANEL MOUNT


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Model 1500 Digital Transmitter

Standard Features on the 1500 Digital Transmitter

Meriams 1500 Digital Transmitters are for high accuracyapplications for OEMs, on manufactured skids, in process controlsystems and plant instrumentation. RS-485 communicationsallows for easy configuration using a PC or laptop computer.The RS-485 addressable interface allows up to 32 devices to benetworked together. Optional 1-5 Volt or 4 - 20 mA outputs arealso configured from a PC or laptop.

0.025% of URL (Upper Range Limit). Absolute, gauge and differential pressure sensors.

316SS isolated sensors for wet/corrosive process. Cost saving, non-isolated sensors for gas service. No temperature effect on RS-485 output from 23 to 122 F.

Damping rates: User selectable from 0.1 to 25seconds

NIST Traceability: NIST certificate supplied withall models.

Temperature Range:Storage: -40F to 140F (-40C to 60C)Operating: 23F to 122F (-5C to 50C)

Process Connections:Pressure: 1/8" female NPT, 316ssElectrical: DB-9

Media compatibility: Non-isolated Differentialsensor (DN) for clean, dry, non-corrosive gases.Isolated Gauge and Absolute sensor (GI and AI)for fluids compatible with 316ss.

Pressure limits: Twice range on Gauge andAbsolute (GI and AI) units. Twice range onDifferential (DN) units when pressurized on highside only and 150 PSI (10.5 Kg/cm2) static whenapplied to both sides of the sensor simultaneously.

Engineering units: cm H2O, in H2O (at 39.2, 60and 68F), mBar, Bar, mm Hg, in Hg at 0C, PSI,kPa, Kg/cm2 and user scaled.

Enclosure: 2" x 4" x 4" NEMA 12 AluminumHousing

Mounting: Standard transmitter secures bypressure connections. Optional mountings areDIN rail clip or surface/wall mount flange.

Weight: DN units are 1 lb.GI & AI units are 2 lb.


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1500 Digital TransmitterDigital Communications

RS-485 PROGRAMMING:Pressure zero setReset factory zeroAnalog output span and offset factor setDamping factor setEngineering unit selectionMulti drop address selection

1500 Transmitter Accessories/Options:

RS-485 interface devicesProcess connection adaptersElectrical connection adaptersSystem setup softwareSimultaneous digital communications andanalog outputs

1500 Digital Transmitter Output Specifications

Model 1500 Digital Transmitter

Output Accuracy:RS-485 0.025 % of URL (0.1% 20" sensor)

4 - 20 mA 0.05% of URL. 0.125% on 20" sensor 0.125% span @ 4:1 turndown of URL

1 - 5 VDC 0.05% of URL 0.125% on 20" sensor(or 0 - 5V) 0.125% span @ 4:1 turndown of URL

Output Temperature Effect:Digital Output: No temperature effect from -5 Cto 50 C

Analog Output: .005% of span / C

Long Term Stability: 0.1% URL per year

Output Options:RS-485 (standard): Half Duplex, 3 wire- TR-1,

TR-0, and Signal ground. 9600 baud, 1start bit, 1 stop bit and no parity.External power of 7 to 32 VDC (40 mAmax). Multi-drop addressing with up to32 devices maximum per RS-485 seg-ment. RS-485 repeaters for additionalsegments.

4-20 mA (optional): 2 wire current loop. 17 to 32VDC for loop supplied 4-20 mA.

1-5V (or 0 - 5V) (optional) : 4 wire, 17 to 32VDC powered.

1500 Digital Transmitter Ordering Information

DN0020 0-20" H2O DifferentialDN0200 0-200" H2O DifferentialDN2000 0-2000" H2O DifferentialGI0020 0-20 PSI GaugeGI0200 0-200 PSI GaugeGI2000 0-2000 PSI GaugeAI2000 0-2000 mm Hg AbsoluteAI0900 0-900 mm Hg Absolute

Please Specify the Model Number and Sensor Type.

Example is based on a Model 1500 with a 200" H2ODifferential sensor1500DN0200


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Differential Pressure Gauges

The Meriam Bellows D/P line of instruments serves as acompliment to the Meriam Manometers by offering achoice when pressure rating, space, processcompatibility and many other specifications are afactor. The Meriam Bellows D/P units are used bymany instrument manufacturers as the basicdifferential pressure sensing devices for indicators,recorders, transmitters or controllers.

Meriam Series 1120 D/P IndicatorsThe series 1120 gauges are designed to measure differential

pressures, particularly for flow and liquid level. They arewidely used in industrial process plants, power plants, pollution

control facilities and liquid cryogenic storage tank level. Models 1123, 1124 and1126 have 3", 4-1/2" and 6" dials respectively. A variety of scales for differential pressure, flow

and level can be supplied. The unit is compact and has 270 pointer movement for greater resolution.

Meriam Series 1220 Indicating SwitchesThe Series 1220 Differential Pressure Indicating Switches are used for on-off control or alarm. They alsoindicate flow, liquid level or other process variables. These units are furnished with one or two SPDTtype switches with actuation set points easily adjustable over most of the range of the instrument. Thecalibrated travel of the pointer is 270 degrees, which gives good differential pressure indication andswitch resolution. Dials can be supplied with linear scales for differential pressure, square root scalesfor flow, or custom scales for level. The Series 1220 Switches are used extensively in power plants,compressor stations, and cryogenic applications.

Meriam Series 1226X Explosion-Proof SwitchesMeriams 1226X Explosion-Proof Indicating Switch is CSA and U.L. listed, meeting N.E.C. requirementsfor Class I, Division I, Group B or Group D hazardous environments. The explosion-proof housing ismade from a strong, lightweight aluminum alloy that is both non-rusting and non-sparking. A large glasswindow provides full viewing of the 6" indicator. Wall, panel or pipe mounting can be supplied.

Meriam 1126P-2 Portable IndicatorThe 1126P-2 is designed for portable applications. Typical examples are periodic measurements of the

pressure drop across filters, balancing of flow rates in heating and cooling systems, and checking of backflow prevention devices. Meriams 1126P-2 consists of an 1126 D/P Indicator with 3-valve manifold andpiping, 2 hoses, and quick disconnects. Each instrument system is assembled as a complete package withall the accessories mounted in a rugged, lightweight, case. When used as a flow measuring device, theinstrument normally comes with a 0-100% square root scale. With all flow elements designed for the samedifferential, multiplying the scale reading by the primary elements full flow design value gives readingsdirectly in flow units. Scales in flow units, inches of H20, PSI and metric units are also available.


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MODEL 1123 1124 1126 1224 1226 1226X 1126P-2

DIAL SIZE 3" 4-1/2" 6" 4-1/2" 6" 6" 6"

HOUSING END STATIC WORKING PROCESS

Combinations HOUSINGS CENTERPLATE PRESSURE CONNECTIONS

Brass Brass 500 or 1000 PSI. 1/4" NPTSteel Steel or Brass (500 SWP only) 1500, 3000 or 6000 PSI 1/4" & 1/2" NPT316SS 316 SS, Steel or Brass (500 SWP only) 1500, 3000 or 6000 PSI 1/4" & 1/2" NPTMonel 316SS 1500, 3000 or 6000 PSI 1/4" & 1/2" NPT

BELLOWS Beryllium Copper (30" W.C. Minimum--60 PSID Maximum)316 Stainless Steel (50" W.C. Minimum--500 PSID Maximum)Monel (50" W.C. Minimum--60 PSID Maximum)

MOUNTING FLUSH PANEL using indicator case for mounting.WALL or 3/4" NPT using universal mounting bracketPIPE SADDLE or WALL using "H" mounting bracket and 2" U-Bolts.

STANDARD 0.75% FS for ranges 50" WC and greater; 1.5% FS for ranges less than 50" WC.FEATURES Simple zero, span and linearity adjustment (field calibration).

Temperature compensation for varying ambient.NEMA 4, Die-cast aluminum indicator case.Built-in pulsation dampening (field adjustable).270 pointer travel for improved resolution.Break-resistant acrylic viewing window.

Over-range protection.

OPTIONS Special scales. CE approved models.Square Root Valve manifolds and piping.Linear Tank Shatterproof glass viewing window.Non Linear CSA approved 1224 and 1226 models.

Red set pointer. Anti-Parallax Mirror dial.Bellows fill fluids. Special process connection sizes and locations.Shock and vibration modifications. Stainless steel indicator housings and bezel rings.Personalized I.D. tags. Special relays for 1220 series models.LOX cleaning. NACE MR-01-75 modification.Diaphragm seals and capillary tubing.

Meriam Bellows D/P InstrumentsQuick Selection Chart

Differential Pressure Gauge Ordering Information

General Format:Model Range - End Housing - Center Plate Bellows Scale - Working Pressure

_ _ _ _- _ _ -_ _ _ _ EH-_ _ _ _ _ CP- _ _ _ _ _B- _ _ _ _ _ - _ _ _ _Additional Scale Configurations Available Please Consult Factory For Details

Example: Differential Pressure gauge 6" dial, 316 SS wetted parts, 1000 PSI working pressure, 50" DP linear scale

1126 50 316EH Brass CP 316B Linear 1000


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Meriam Instruments Series 1300 Bourdon Tube Gaugesare rugged and dependable mechanical pressure indicators.Several model choices are available to suit a variety ofapplication environment. From heavy duty glycerine filledpressure gauges to general process and field-repairablestainless steel gauges, Meriam has the gauge you need.Dial sizes are 2 12", 4" and 4 12". Pressure ranges are avail-able from 30" of Mercury vacuum up to 30,000 PSIG withshort term over-pressure limits up to 1.3 times the fullscale value. Mounting options include lower mount stem,center back mount and lower back mount for direct

mounting to the process piping. Flush front and panelmount kits are also available.

Model 132334 Bourdon TubeProcess Pressure GaugesThese industrial type 4 12" process gauges are suitablefor corrosive environments where the fluid medium iscompatible with 316SS and not prone to clotting. Theindicator case is available with optional liquid fill for

severe vibration service. Solid front, blow-out backmeets safety requirements of ASME B40.1. Lowermount stem and lower back stem process connectionare available in 14" or 12" MNPT. Optional panelmounting kit is also available.

Accuracy: +0.5% of FS (ASME B 40.1 Gr 2A)Ranges: Vacuum / Compound -30" HG / 0 / 200 PSI

Pressure from 15 PSI to 30,000 PSIWorking Pressure Range:Stable working pressure: 0.75 x full scale valuePulsating pressure: 0.90 x full scale valueShort time over-pressure: 1.30 x full scale value

Operating Temperature: -40 to 140F (-40 to 60C)Media: -40 to 212F (-40 to 100C)

Case: Black reinforced thermoplastic, rear flange lugs

132354 Bourdon Tube Stainless Steel PressureGauges - Field RepairableThese gauges are suitable for most process mediasthat are compatible with 316 St. Stl. wetted parts andare not prone to clogging the gauge's pressure system.St. Stl. case can be ordered liquid filled to dampen thepointer and lubricate movement. Bayonet-type bezelring allows easy access to gauge movement for re-cal-

ibration or pointer adjustment. 21

2" & 4" dial sizes.1

4"or 12" MNPT connections.

Accuracy: 2 12": + 1.5% of span, 4": + 1.0% of spanRanges: Vacuum / Compound to -30"HG / 0 / 200 PSI

Pressure from 15 PSI to 15,000 PSIWorking Pressure Range:Stable working pressure: 0.75 x full scale valuePulsating pressure: 0.90 x full scale value

Short time over-pressure: 1.30 x full scale valueOperating Temperature: -40 to 140F (-40 to 60C)

Media: -40 to 212F (-40 to 100C)Case: 304 stainless steel with vent plug and stainlesssteel bayonet ring.EPDM o-ring between case andconnection (4"); Welded case / socket connection (2 12")

132140 Bourdon Tube Pressure Gauges -Forged BrassCase with Copper Alloy Wetted PartsHeavy-duty, glycerine filled pressure instrument forstability and long service life. Offers superior servicewhere pulsation or vibration exists. Compatible withall medias that do not clog connection port or corrode

copper alloy. 2 12" and 4" dial sizes. 14" or 12" MNPTconnections.

Accuracy: 212": + 1.5% of span, 4" + 1.0% of spanRanges: Vacuum / Compound to -30"HG / 0 / 200 PSI

Pressure from 10 PSI to 10,000 PSIWorking Pressure Range:Stable working pressure: 0.75 x full scale valuePulsating pressure: 0.67 x full scale valueShort time over-pressure: 1.00 x full scale value

for 4" size, 1.30 x full scale value for 212" sizeOperating Temperature: -4 to 140F (-20 to 60C)

Media: 140F (+60C) max. soldered tube212F (+100C) max. brazed tube

1300 Series Mechanical Pressure Gauges

20


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Pressure / Vacuum VariatorThis can produce -10 PSIG to 30 PSIG (-.69 to 2.0

Bar) or 12 to 20" Hg (300 to 500mm Hg) vacuum.Max. Pressure is 20 PSIG (1.3 Bar) when used withother pressure sources. A table stand is available for

bench top usage. Connections are 1/4" FNPT.

Hand PumpsThese are available in 2 models, Pressure or

Vacuum. The pressure pump generates a positivepressure up to 145 PSIG, while the vacuum pumpgenerates a vacuum of 650mm Hg. Both units featurea needle bleed valve and a multi-turn vernier, whichprovides precise adjustment. Connections are1/8" FNPT.

Line Traps

Line Traps are an inexpensive means to keepmanometers and indicating fluids clean and arerecommended for all installations. When installed in theline ahead of the manometer they permit entrainedsolids to settle out before they reach the manometer.When used with gases or vapors they trap moisture.

Sight Feed BubblersBubblers provide a visual indication of flow by

showing air or gas bubbles discharging from a diptube immersed in a liquid in a transparent bowl. The

bubble rate is controlled by a stainless steel needlevalve in the head casting.

Bubblers and Line Traps available with heavy walltransparent bowls made of either plastic or glass.

They are rated at 100 PSI and 50 PSI respectively.Either a ring type or strap type configuration is avail-

able for securing the bowl to the head.

Float Check ValveThis is a most valuable accessory small enough tobe installed on each tube of a multiple tube manometer,yet fully dependable. Normal operation of themanometer is not impaired by vertical installation ofthe float check valve. If pressure increases beyond theinstrument range the valve closes preventing the fluidfrom leaving the manometer. The valve opens whennormal pressure is restored. Maximum operatingpressure is 500 PSIG.

Return WellsThese are stainless steel and for use on manometers

with operating pressures up to 500 PSIG. The indicat-ing fluid is trapped during Manometer over pressure.Fluid will drain back into the Manometer when nor-mal pressure is returned.

Seal PotsMeriam Seal Pots are used to provide a constant

liquid head on each side of a flow meter involvingsteam or other condensable vapors. They also isolatethe instrument from the process with a sealing liquid.

All Meriam Seal Pots are fabricated from grade Aseamless steel pipe. Each unit is cold hydraulic testedto over twice its rated working pressure. All connec-

tions are 1/2" NPT furnished with solid steel plugs.The finish is red oxide primer.

Accessories


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Manometer

Meriam Manometers have many advantages in this age of technology

because of their inherent accuracy and simplicity. Manometers are unique inbeing both pressure measurement instruments and standards for calibration ofother instruments. Once considered solely a laboratory instrument, themanometer is today commonly used in production applications to measurepressures ranging from as high as 100 inches of mercury to the lowest vacuumsof space.

U-Tube ManometerThe U-tube manometer is the basic and most widely used style of manometer.

The Meriam U-tube manometer is a versatile, economical instrument for themeasurement of pressures, vacuums or differential pressures.

Pressure measurements are accomplished by balancing a vertical head ofindicating fluid with the pressure to be measured. There are no cams, gears,or levers to operate in the manometer. This allows the U-tube manometer to berecognized by NIST as a primary standard due to its inherent accuracy andsimplicity of operation.

Meriam U-tube manometers are constructed of a ridged cast aluminum frame,aluminum indicating scale and hand bent glass U-tube. Mounting holes areprovided in the frame for mounting to a wall, column or other suitable structure.

Well Type ManometerWell manometers are a direct reading device

designed for process monitoring, general purposeproduction testing or laboratory measurement. Designedfor a maximum line pressure of 250 PSI (500 PSI optional) these instrumentsmay also be used for tank level, flow measurement and leak detection. Wellmanometers are constructed of aluminum channel, stainless steel endblocks and stainless steel manometer well. The 7/16" diameter glass tubingis yoke packed with viton gaskets at each end block and is supported atspaced intervals to prevent distortion.

In most cases, the uncertainty of a manometer reading is + 1/2 of thesmallest scale graduation. This is due to the human eyes ability tointerpolate between graduations

Inclined ManometerInclined manometers provide greater readability by stretching a

vertical differential along an inclined indicating column, giving moregraduations per unit of vertical height. This effectively increases theinstruments sensitivity and accuracy. Scales are typically graduatedto the hundredth of an inch.

The Model 40HEX Inclined manometer is individually calibratedand the angle of inclination is set relative to the instrument levelmounted above the channel. The unit is also capable of operatingwith 350-PSI line pressure. The construction of the 40HEX35 is similarto the well type manometer described above.

Additional inclined manometers are available depending on your

requirements. Please review the manometer chart on the facing page orcontact the factory for assistance.


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*CONSULT FACTORY FOR OTHER AVAILABLE MODELS AND FLUIDS

Meriam ManometersQuick Selection Chart

MODEL

"U" TUBE10AA25

"U" TUBE HgFILLED

ABSOLUTE11AA10

HI PRESSURE

"U" TUBE20DAX40

GENERALPURPOSE30EBX25

30EBX50

PRECISIONVERNIER30EFX25

Hg FILLED

ABSOLUTE310ECX10310EFX10

MULTIPLETUBE

33KBX35

MICROPRECISION34FB2TM

34MB2TM

ACRYLICINCLINED40AM10

40AX10

GENERALPURPOSEINCLINED40HEX35

DRAFTGAUGE

INCLINED40GD10

RANGES(In Inches)

6, 10, 15, 20,30, 50"

5, 10, 19, 29,50"

10,20,30,40,

60, 80, 100"

6, 12, 20, 30,35, 40, 50, 60,

80, 100"

20, 30, 40, 50,60"

6, 12, 20, 30,

35, 40, 50, 60,80, 100"

12, 20, 30, 40,50, 60, 80, 100"

10, 20"

1, 2, 3, 6"25, 50, 75, 150mm

2, 4, 6, 8, 10,12, 14, 16, 18,

20"

1/2, 1, 1-1/2,2, 3, 4

WETTEDPARTS

Cast Iron316 SS PVC

Cast Iron316 SS

303 SS

303 SS

303 SS

303 SS

303 SS

Stainless Steel

Acrylic

Stainless Steel

Aluminum

PRESSURERATING

250 PSIG

100 PSIG

400 PSIG

250 PSIG500 PSIG

250 PSIG

100 PSIG

350 PSIG

20 PSIG

100 PSIG

350 PSIG

100 PSIG

MOUNTINGSTYLES

WallTable

WallTable

Wall

Table

Wall, TableFlush Front

Pipe


Pipe

Wall, Table

Flush Front


Table

WallTable

Wall

Wall

Manometers: U Tubes & Well Types & Inclines


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Laminar Flow Element

Laminar Flow Element

Meriam Laminar Flow Elements aregas volume rate of flow differential

producers operating on capillary flowprinciples. They are available in a wide

range of types and sizes and are ideallysuited to many flow measurement and

calibration applications.

Some typical applications of Meriam LFE Elementsinclude: combustion airflow to internal combustion engines, fan

and blower calibration, leak testing, and testing of automobile components.

LFEs are used to calibrate other flow metering devices such as variable area meter,thermal anemometers, orifices, nozzles, etc. Contact us for application assistance.

Calibration and Accuracy

GAS PROPERTIES AT STANDARD CONDITIONS OF 29.92" Hg. Abs. and 70F

Gas Density (lb/ft3) Viscosity Micropoises Specific GravityAir 0.0749 181.87 1.000Argon 0.1034 222.45 1.380Helium 0.0103 196.90 0.138Hydrogen 0.0052 88.41 0.0695Nitrogen 0.0725 175.72 0.968Oxygen 0.0828 201.91 1.105Carbon Dioxide 0.1143 147.84 1.526

NOTE: Ref. American Institute of Chemical Engineers

Meriam LFE elements are calibrated with air at atmospheric conditions, and referenced to 29.92" mercury absolute(760MM HG Abs.) and 70F. (21.1C). Each completed element is calibrated and correlated to Meriam flow standards,which are traceable to the National Institute of Standards and Technology. The Meriam LFE element is supplied witha reproducible flow curve in terms of SCFM versus differential pressure in inches of water. Correction factors areincluded to cover an inlet pressure range from 26 to 36 inches of mercury absolute and an inlet temperature from50F to 150F. For special flow applications, we request you contact Meriam, giving complete flow information. Therated accuracy* of all Meriam LFE elements is of actual reading and is not the much wider tolerance of other devices

which are based on percentage of maximum flow rate.

*Accuracy Levels Available:Commercial Calibration +0.86% of Actual ReadingMaster Calibration +0.70% of Actual ReadingIndependent Lab Calibration +0.50% of Actual Reading

Special calibration procedure service is available for those Meriam LFE units, which are governed by quality programsrequiring periodic recalibration. The Special Calibration Procedure #A-33544 is designed to meet the basic require-ments of MIL-STD-45662A, ANSI Z540, 10CFR50 and MIL-Q-9858A. Contact Meriam direct for information.

Meriam LFE Elements are normally rated for maximum flow at 4 or 8 inches of water differential. There is no recoveryof pressure differential in a Laminar Flow Element matrix. Filters, inlet and outlet configurations increase the total

pressure drop and must be considered when pressure loss considerations are critical.


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LFE Sizing Worksheet

Customer Name:

Address:

City, State, Zip:

Date:

POC:

Phone:

Fax:

Customer No. :

Service Description:

MERIAM No. :

Tag or ID No. :

GAS: (AIR) (ARGON) (CARBON DIOXIDE) (HELIUM) (HYDROGEN)

(NITROGEN) (OXYGEN)

STANDARD CONDITIONS: DEG (70 DEG F)

(29.92" HG ABS.)

TEMPERATURE AT FLOW: DEG (F) (C) (R) (K)

SPECIFIC GRAVITY: (MOLECULAR WT. OF FLOWING GAS / 28.95)

VISCOSITY: (MP) (CP) (LB. SEC/FT2) (LB/(FTS))

(PASCAL SEC)

DENSITY (LB/FT3

) (Kg/CM3

) (Kg/M3

) (g/CM3

)

FLOWING PRESSURE UNITS: (Hg @ 0 DEG C) (mm Hg @ 0 DEG C) ( H2O @ 4 DEG C)

(mm H2O @ 4 DEG C) (cm H2O @ 4 DEG C) (PSI)

(Kg/m2) (Bar) (MILLIBAR) (PASCALS)

FLOW: (MASS) (POUNDS) (KILOGRAMS)

(SECONDS) (MINUTE) (HOUR)

(VOLUME) (ACTUAL) (STANDARD)

(CUBIC CENTIMETER) (CUBIC FOOT) (CUBIC METER) (LITER)(SECONDS) (MINUTE) (HOUR)


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50MK10-850MK10-750MK10-650MK10-550MK10-450MK10-350MK10-250MK10-1

50MJ10-1450MJ10-1350MJ10-1250MJ10-1150MJ10-10

50MJ10-9

50MW20-150MW20-1 1/250MW20-2

50MH10-150MH10-1 1/450MH10-1 1/250MH10-250MH10-350MH10-450MH10-550MH10-650MH10-8 X50MH10-10 X50MH10-12 X50MH10-16 X

50MY15-2 1/250MY15-350MY15-450MY15-550MY15-650MY15-8 X50MY15-10 X50MY15-12 X50MY15-16 X

50MR2-250MR2-450MR2-650MR2-8

50MC2-250MC2-450MC2-650MC2-8

0.10 SCFM @ 8" water diff.0.18 " " " " "0.38 " " " " "0.70 " " " " "1.60 " " " " "

3.00 " " " " "

Model 50MK10

Model 50MJ10

Model 50MW20

Model 50MH10

Model 50MY15

Model 50MR2

Model 50MC2

MODELMODEL NUMBER & DESCRIPTIONNOMINAL AIR FLOW RANGE

STANDARD CUBIC FEET/MINUTE(29.92" Hg. Abs. & 70F) (SCFM)

Utilizes stainless steelcapillary tubes cementedinto a stainless steel body.Inlet, outlet, and differentialpressure connections are1/4" NPT.

All stainless steel unit withfused matrix. Differentialpressure connections are 1/4"NPT. Line connections 1/2"NPT, except Type 9 which has

a 3/4" NPT.

All stainless steel welded unitwith fused matrix. Line con-nections are threaded.Differential pressure connec-tions are 1/4" NPT.

All stainless steel unit withfused matrix. Line connec-tions are plain ends (nothreads) for hose connection.

Differential pressure connec-tions are 1/4" NPT.

All stainless steel unit withfused matrix. Differential pres-sure connections are 1/4" NPT.Line connections are 150 lb.flanges.

This unit is for low pressureapplications. Differential pres-sure connections are 1/4" NPT.Aluminim 150 lb. flanges arefurnished at inlet and outlet

This unit is for low pressureapplications. Differential pres-sure connections are 1/4" NPT.Designed for use with hose forline connections at inlet and

outlet

Pipe Size

1/4"1/4"1/4"1/4"1/4"1/4"1/4"1/4"

1/2"1/2"1/2"1/2"1/2"

3/4"

1"1 1/2""

2"

1"1 1/4"1 1/2"

2"3"4"5"6"8"10"12"16"

2 1/2"3"4"5"6"8"10"12"16"

2"4"6"8"

FOR HOSE2" I.D.4" I.D.6" I.D.8" I.D.

.00019 SCFM @ 4" water diff.

.00062 " " " " "

.00124 " " " " "

.0025 " " " " "

.0046 " " " " "

.0081 " " " " "

.0149 " " " " "

.046 " " " " "

7.5 SCFM @ 8" water diff.22.0 " " " " "40.0 " " " " "

7.5 SCFM @ 8" water diff.16.0 " " " " "23.0 " " " " "40.0 " " " " "90.0 " " " " "

160.0 " " " " "250.0 " " " " "360.0 " " " " "640.0 " " " " "

1000.0 " " " " "1440.0 " " " " "2250.0 " " " " "

60.0 SCFM @ 8" water diff.90.0 " " " " "

160.0 " " " " "250.0 " " " " "360.0 " " " " "640.0 " " " " "

1000.0 " " " " "1440.0 " " " " "2250.0 " " " " "

100.0 SCFM @ 8" water diff.400.0 " " " " "

1000.0 " " " " "2250.0 " " " " "

100.0 SCFM @ 8" water diff.400.0 " " " " "

1000.0 " " " " "2250.0 " " " " "

Meriam LFE Quick Selection Chart


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Accuracy levels available:commercial calibration 0.86%reading: master calibration 0.70%reading: independent labcalibration 0.5% reading.

Units available to measure15,000 SCFM.

All units available with filtersexcept those marked with X.

CC/MIN

5.3817.535.170.8

130229422

1300

28305100

107001980045300

85000

2.12 x 10 56.23 x 10 51.13 x 10 6

2.12 x 10 54.53 x 10 56.51 x 10 51.13 x 10 62.55 x 10 64.53 x 10 67.08 x 10 61.02 x 10 71.81 x 10 72.83 x 10 74.07 x 10 76.37 x 10.7

1.69 x 10 62.55 x 10 64.53 x 10 67.08 x 10 61.01 x 10 71.81 x 10 72.83 x 10 74.07 x 10 76.37 x 10 7

2.83 x 10 61.13 x 10 72.83 x 10 76.37 x 10 7

2.83 x 10 61.13 x 10 72.83 x 10 76.37 x 10 7

NOMINAL AIR FLOW RANGE(760 MM Hg. Abs. & 21.1C)

LPM

0.005380.01750.03510.07080.1300.2290.4221.30

2.835.10

10.819.845.3

85.0

212623

1130

212453651

1130255045307080

1020018100283004080063700

1700255045307080

1020018100283004080063700

2830113002830063700

2830113002830063700

Kg/M

6.44 x 10-62.10 x 10-54.21 x 10-58.48 x 10-51.56 x 10-42.75 x 10-45.06 x 10-4

0.00156

0.003390.00610.01290.02370.0543

0.102

0.2540.7461.357

0.2540.5430.7801.353.055.438.48

12.221.733.948.876.3

2.033.055.438.48

12.221.733.948.876.6

3.3913.633.976.3

3.3913.633.976.3

MAX DP MM H20

101.6101.6101.6101.6101.6101.6101.6101.6

203.2203.2203.2203.2203.2

203.2

203.2203.2203.2

203.2203.2203.2203.2203.2203.2203.2203.2203.2203.2203.2203.2

203.2203.2203.2203.2203.2203.2203.2203.2203.2

203.2203.2203.2203.2

203.2203.2203.2203.2

NOTES

1. The flows and differential pressure rating of production units aresubject to a variation of plus or minus 10% from the nominal valueslisted above.

2. Each LFE unit is calibrated with air to Meriam flow standards, whichare traceable to the National Institute of Standards and Technology.Meriam calibration flow curves are furnished with each unit.

3. A special service is available for those Meriam LFE units, whichare governed by quality programs requiring periodic recalibration.The Special Calibration Procedure A-33544 is designed to meet thebasic requirements of 10CFR50, ANSI-Z540-I & ML-Q-9858A.Contact Meriam direct for information.

4. The catalog capacities refer to the following base conditions:Base flowing gas: Air. Base pressure 29.92" mercury absolute.Base temperature: 70F, 530R absolute. Base viscosity: 181.87microproises. Base Reynolds Number: 300 at 8" H2O, 150 at 4" H2O.

5. SCFM* - See page 6 for definition.

6. All units are offered with optional integral filter on inlet sideexcept those marked (X). Removal or replacement of filter necessi-ties recalibration.

7. Rated flow pressure and temperature for standard units are 30

psig and 150F. to maintain laminar flow, calibration, linearity and

accuracy. For higher pressure and temperature rating call Meriam

Representative or direct to Meriam Instrument.

INSTALLATION

Due to asymmetry of filter elements, calibration accuracyof assembly cannot be guaranteed if filter is removed forany reason. If filter is removed, the assembly should be

recalibrated to ensure accurate performance.

For pressures greater than 30

PSIG or 120 F, MeriamInstrument recommends theUniversal Calibration CurveMethod for calculating flow ratethrough an LFE. This methodincorporates density correctionsinstead of the ideal gas law correc-tions common to the Classical LFEequations. While the Classicalequations are excellent at condi-tions below 30 PSIG or 120 F, theUniversal Calibration Methodprovides more accurate resultsabove these values. Consult

Meriam for your higher pressureor temperature applications andfor sizing assistance.


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Meriams Accutube Flow Sensors are lab-tested and field-proven flow elements perfect for gas, liquid or steamservice. With thousands in use worldwide, the Accutube continues to be the right choice when ease of installation,cost effective operation and highly accurate performance is required.

The Accutube averaging Pitot tube is a head type device, which generates a differential pressure signal similar to theorifice, venturi, flow nozzle, and other head producing primary elements. It can be used for flow measurement onlyor with static pressure and temperature transmitters as the primary measurement source for a flow control loop. Ithas been proven that the Accutubes flow measurement accuracy is better than that of the orifice. The Accutube alsogenerates considerable cost savings with its simple installation and wear-free, energy-efficient design, providing aviable alternative to traditional flow measurement devices.

Meriams Accutube Flow Sensors

The Accutube is an annular averaging Pitot device, which is simply inserted into a pipe or duct through a weldcoupling and packing. Based on pipe or duct size, the Accutube is constructed so that strategically located sensingports continually sample the impact and static pressures produced by the Accutubes obstruction of the flow streamprofile. Within the probe, the impact pressures sensed by the upstream ports are continually averaged in an isolatedplenum chamber. Similarly, the static pressures sensed by the downstream ports are averaged in a second isolatedplenum. A readout device is then used to indicate the differential between the two-plenum chambers.

Meriam Accutubes are provided in a wide variety of models enabling you to select the probe diameter and mountingconfiguration compatible with your application needs. Meriam also has available special mounting hardware, valvesand materials for use in high temperature and pressure applications and corrosive environments.

For convenience in selecting and sizing Accutubes for your applications, please refer to the data form found on page25 in this catalog. Complete the form and submit it to the factory for detailed analysis and configuration. Forfurther assistance on Accutube sizing and selection, feel free to contact Meriam Instrument or your local Meriam

representative. You can request the "Accutube Selection and Sizing Data Sheet" if you need detailed steps onselection and sizing.

Principal of Operation

AccuracyTrue double averaging design+1% of rate accuracy+0.1% repeatability

Tested and certified by independent flow labs

ConfidenceTesting by the Utah Research Laboratory-UtahState University, the University of Michiganand testing against NIST traceable Meriamflow elements confirm typical accuracy of

1% of rateMaterial Certification and Certificate ofConformance per customer specification areavailable.Certified welding fabrication to ASME Code,Section IX Procedures.Dye penetrant and hydrostatic testing capability.Canadian registration number.

ConvenienceApplicable to gases, liquids, steamSimple installation and maintenanceFour standard models and probe sizes: Insertion,Flanged, Wet tap with socket or gear driveretraction, Integral three-valve manifold, optional

Bi-directional flow sensing

EfficiencyLow permanent head loss saves energy and costMultiple tube design offers superior strength and

clog resistanceUnaffected by wearNo system shutdown with wet tap modelIdeal for flow system upgrades and expansionsIntegral 3-Valve head option saves installationpiping and transmitter mounting time.Gear Drive wet tap reduces insertion andretraction time

Accutube: Features


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The Accutube reduces initial costs through low purchase price and reducedinstallation cost.The purchase price of an Accutube will almost always be less expensive than other head producing primary ele-ments. Meriams simple and effective Accutube design allows us to pass fabrication savings on to you. Whenmounting hardware is considered, the Accutube will always be low in cost. No flanges are required, just the simplemounting hardware included with the Accutube. Choose the integral 3-valve manifold Accutube head to reduceyour transmitter mounting and piping costs.

The Accutubes installation costs are also low. On an 8-inch pipe, for example, installation of the Accutubes mount-ing thredolet requires only 4 linear inches of welding while orifice flanges for the same size pipe require 50 linearinches. Orifice flanges also require pipe cutting, weld preparation and weld cleanup. With the Accutube, simplyweld on the thredolet, bore a hole, install the Accutube and tighten the packing gland. Youre ready to go!

Operational savings continue

with low-cost maintenance, wet tap flexibility and low permanent head loss.The Accutube simplifies preventive maintenance with its clog-resistant and wear - free design. This combination

brings downtime to a minimum and frees you to concentrate on the process itself.If shutting down your process is too costly, then look to Meriams Wet Tap Accutubes. These Accutubes can beinserted and retracted without process interruption, after being installed without process shutdown. This flexibilitygives you the ability to spot check the process, inspect the Accutube and pig or flush the line without Accutubedamage while eliminating the need for by-pass piping and valve systems. Choose from socket or gear drive retrac-tion options to meet your needs.

Accutubes save you money by causing less permanent pressure loss. Permanent pressure loss (unrecoverable headloss) is the system energy lost due to the primary elements obstruction of the flow stream. This pressure drop iswhat your pump or fan has to overcome and is directly related to system operating costs. The Meriam Accutube ismuch less of a flow obstruction than other primary elements. Test results on the Accutube show typical unrecover-able head loss of 2 10 % of the produced differential pressure. This means that there is much less permanent pres-sure loss, less work for the pump or fan to do and much lower operating costs. The difference in using Accutubesversus orifice plates can add up to hundreds of dollars per year in pump or fan horsepower per measurement point.

Accutube: Low-Cost Flow Measurement

Meriam Accutubes perform best when installed in the proper orientation with respect to piping configuration. Thefollowing diagrams and tables show correct installation orientation and straight-run requirements both upstreamand downstream of the Accutube location.

Sensor Orientation

Accutube: Installation Requirements

HORIZONTAL LINESBottom EntrySide EntryTop Entry

VERTICAL LINESSpecial 90 Rotated Accutube Head

recommended for liquid and steam use.


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Accutube: Series 10A and 11A


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Accutube: Series 20T and 21T

03


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Accutube: Series 22L and 23L


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Accutube: Series 24D and 25D


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Accutube: Series 33T Low Pressure Wet Tap


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SD

GD

SocketDrive

GearDrive

35

Accutube: Series 37L High Pressure Wet Tap

BODY MATERIAL ORDER

316SS Head and 03Probe

For Special Material SPConsult Factory


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Accutube: Series 40H thru 43H

36


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Accutube: Series 70H & 72H(with RTD)


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Accutube Sizing Worksheet


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Orifice Plates - Model 951

Meriam Orifice Plates

Meriam Instrument provides orifice

plates designed and manufactured toAGA, ISA, ASME and ISO-5167 stan-dards. Tolerances and specificationsare tightly controlled for greatestprecision and reliability. Materialsavailable include 304SS, 316SS,Monel, Inconel and Hastelloy. Platescan be designed for all ANSI flangeratings and standard pressure taplocations. Calculations as well asflow versus differential pressure andtemperature and pressure correctioncurves are available.

Orifice Flanges - Model 952Meriam raised face orifice flange unions are designed to provide a convenient, accurate method for installingorifice plates. They incorporate accurately positioned pressure taps for connecting the flow measuring instruments.This eliminates the requirement of locating pressure taps in the field. Improper location of these taps will result inpoor accuracy of the flow measuring system. These built-in taps also reduce field installation labor necessary forwelding, drilling and/or tapping pressure taps on the flow line itself. Meriam orifice flanges are provided completewith nuts, bolts, gaskets, and plugs for installation with no other parts required. Contact Meriam or your localrepresentative for dimensional information and special pipe sizes.

To orderMeriam orifice flanges, specify

1. MODEL 2. LINE SIZE 3. MATERIAL 4. PRESSURE RATING 5. LINE CONNECTIONS

MODEL 952 FS 30

forged steel, slip-on welding, pipe sizes 1"-24"300lb. raised faceFor systems where welded connections are required. These flangesare slipped over the pipe which is brought flush with the flangeface. The pipe is then welded to the flange.

MODEL 952 FW 30

forged steel, welding neck, pipes 1"-24"300lb. raised faceSimiliar to slip-on welding model but for use where weld neck ispreferred. These flanges are butted up against the ends of the pipeand welded in place.

MODEL 952 FT 30

forged steel, threaded, pipes 1"-12"300lb. raised faceDesigned for systems where threaded connections are suitableand conditions require forged steel.

MODEL 952 PV 15

PVC socket type, pipes 34"-8"150lb. raised facePVC orifice flanges are socket type where the connecting line issolvent welded to flanges. Pressure connections are corner tap.


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Orifice Bore Calculation Specification FormFILE NO. 951:411 2

11 89ORIFICE PLATE DATA SHEET

CUSTOMER_____________________________ MERIAM ORDER_____________

P.O. NO. _____________________________ MODEL_____________________

TAG NO. ______________________________

1. Tap Location Flange Pipe Vena Contracta Corner Radius2. Plate Material 304 SS 316 SS _________ (other)3. Base Pressure 14.73 PSIA or _________ (other)4. Base Temperature 60 F or _________ (other)5. Inlet Pressure _____PSIG or _________ PSIA or _________ (other units)6. Flow Temperature _____F or _________ C7. Pipe Nominal Size _______ inch Schedule _______

or Inside Diameter ________ inch or _________ mm pr _________ (other unit)8. Vent/Drain Hole & Size (choose one) None____ Vent____ Drain ____ Size _____

Type of Calculation (CHOOSE ONE) Beta Ratio Flow Rate Differential(bore) Pressure

NOTE: Units must be indicated: Flow GPM, PPH, SCFM, etc.DP Inches of Water, PSI, etc.

Beta Ratio Calculation Flow Rate Calculation

Max. Flow Rate _______units________ Desired Flow Units _____Normal Flow Rate _______units________ Beta Ratio _____Differential Pressure _______units________ OR Orifice Bore _____units___

Differential Pressure _____units___Differential Pressure Calculation

Max. Flow Rate ____Units____Normal Flow Rate ____Units____Beta Ratio ____Units____OR Orifice Bore ____Units____

9. Type of Fluid (Name) ______ Water ______ _____________________SteamLiquid Gas Vapor

IF WATER, STEAM OR AIR S T O P

10. Flow Viscosity __________ _____________ _____________centipoise micropoise (other unit)

11. Specific Heat Ratio ___________12. Specific Gravity (liquid) OR Density

at Base _______ Base _________#/ft or __________gm/cmat Flow _______ Flow _________#/ft or __________gm/cm

13. Specific Gravity (gas/vapor) OR Densityat Base ________ Base _________#/ft or ________gm/cm

Flow _________#/ft or ________gm/cm14. CURVE ___Yes ___ No Type of Curve

SERIAL NO. ________ Flow vs DP (no additional info needed)Temp Correction Range _____to_______Press Correction Range _____to_______

Submitted by ______________________________________ Date __________________


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Meriam Instruments Flow Measurement Systems are used in conjunction with differential pressureproducing primary flow elements (such as Laminar Flow Elements, Accutubes, Orifice Plates, Venturisetc) to quickly and automatically determine volumetric flow rate, mass flow rate and total flow. Meriamoffers several options to suit your application requirements. The systems are usually ordered with alltransducers necessary to measure the critical parameters of the application. Flow can be calculated usingour state of the art flow computers or in some cases by using the power of your own PC. Any head type(square root) primary element can be modeled as well as Laminar Flow Elements (LFEs). See thefollowing pages for more details.

The LFS-1 Flow Measurement Systems for MeriamLaminar Flow Elements take advantage of the

wide flow turndown and the percent of Readingprecision of the LFE, as well as the applicationand calibration expertise of Meriam, to provide asuperior gas flow measurement solution. LFEsare industry standards for the calibration of awide variety of flow devices such as variablearea meters, orifice plates, flow nozzles, thermalmass flow meters, turbine meters, regulators andvalves. The broad range of flow measurement

they offer make LFE Measurement Systems excellent choices for measurements of engine intake air flow,electronics cooling, leak detection and quantification, production line quality control, component designand product certification applications. The integral flow computer makes real time corrections for changesin static pressure, temperature and relative humidity to provide the most accurate results

possible. Calibration coefficients for up to five (5) LFEs can be stored in memory and called up foruse later with a push of a button.

Special application requirements can often be accommodated by the LFS. For example, simultaneous flowmeasurement of two LFEs can be made and the summation of the two flows calculated anddisplayed. Or, for testing over a wide range for flow, the LFS can be set up to automatically switch fromone LFE to another as flow rates change. Standard digital outputs on the LFS change state as the flow ratemoves from the capability of one LFE to another. External solenoid valves can be used to switch the DPand P transducers to the active LFE. For control or data transmission purposes, the LFS FlowMeasurement System has both analog and digital outputs. 4 20 mA and 0 10 volts analog outputoptions are ideal for control and recording functions. RS-232 or RS-485 digital communications arestandard to facilitate communication with a PC and documentation of test results.

The LFS Flow Measurement Systems (LFS) provide standard system accuracys of 1.0% of Reading overa 10:1 flow turndown and 1.1% over 20:1 turndown. Calibration of the LFE and LFS Flow MeasurementSystem together makes this possible. By using better calibration standards, Meriam can offer LFSaccuracy as low as 0.60% of Reading over a 10:1 flow turndown. All LFS packages include completesystem calibration and NIST traceable documentation. LFEs and systems cover gas flow ranges from0.5 SCCM to 15,000 SCFM. See the Laminar Flow Element section of this catalog for more details on theLFE models available.

41

Flow Measurement Systems

LFS-1 Flow Measurement System


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LFS-3 FLOPAC Flow Measurement System

The Meriam Instrument FLOPAC FlowMeasurement System i

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