04-08

Cole-Parmer Instrument Co.625 East Bunker Court

Vernon Hills, Illinois U.S.A. 60061-1844800-323-4340

fax: 847-247-2929www.coleparmer.com

e-mail: techinfo@coleparmer.com

Cole-Parmer Battery-Powered Digital Pressure Gauges

Accuracy0.25% of full scale 1 least significant digitIncludes linearity, hysteresis, repeatability

Display3 readings per second nominal display update rateRanges up to 1999: 31/2 digit LCD, 0.5" digit height3000 psi, 5000 psi: 41/2 digit LCD, 0.5" digit height,

lower alphanumeric display for engineering unitsNEMA 4X models: Red LED backlight on whenever gauge is on

ControlsRanges up to 1999Front button turns gauge on/offFront calibration potentiometers, non-interactive zero and span, 10% range

3000 psi, 5000 psi rangesFront button turns gauge on, starts auto shutoff timer, and provides zero func-tion for gauge reference rangesNEMA 4X models: Button activates backlighting for 1 minute while gauge is onInternal calibration buttons, non-interactive zero and span, 10% range

Batteries and Battery LifeTwo AA alkaline5 minute auto shutoffLow battery symbol on display when batteries must be replaced

Standard models with ranges up to 1999: approx. 2500 hoursStandard models with 3000 psi, 5000 psi ranges: approx. 2000 hours

NEMA 4X models with backlit display and ranges up to 1999: approx. 180 hoursNEMA 4X models with backlit display, 3000 psi, 5000 psi ranges: approx. 150 to1500 hours depending on backlight usage

DimensionsStandard: 3.38" W x 2.88" H x 1.65" D housingNEMA 4X: 3.5" W x 3.0" H x 2.0" D housingAdd approximately 0.75" to height for pressure fitting

WeightGauge: 9 ounces (approx)Shipping weight: 1 pound (approx)

Material and ColorStandard: Extruded aluminum case, epoxy powder coated. Polycarbonatecover, front and rear gaskets. Light gray body, light gray/blue front.

NEMA 4X: UV stabilized polycarbonate/ABS case, light gray color. Clear poly-carbonate window to protect display. Gasketed rear cover, six captive stainlesssteel screws.

Pressure/Vacuum Connection and Material1/4" NPT male, 316 stainless steel, compatible with most liquids and gases

Overpressure3000 psig range and metric equivalents: 5000 psig5000 psig range and metric equivalents: 7500 psig3000 psi, 5000 psi: 112.5% out-of-range display ii or ii ...All others 2 times rated pressure minimum

Burst Pressure4 times rated pressure minimum or 10,000 psi, whichever is less

EnvironmentalStorage Temperature 40 to 203F (40 to 95C)Operating Temperature 4 to 185F (20 to 85C)Compensated Temperature 32 to 158F (0 to 70C)

68935-180 to 100.0 psig range

68935-320 to 5000 psig range

68936-95 Rubber BootNot for NEMA 4X models

StandardModel no.

NEMA 4XModel no.

Range Resolution

68935-00 68935-34 760 to 0 torr absolute 1 torr68935-02 68935-36 0 to 30.0" Hg vacuum 0.1" Hg68935-04 68935-38 0 to 3.00 psig 0.01 psig68935-06 68935-40 0 to 5.00 psig 0.01 psig68935-08 68935-42 30.0" Hg vac. to 15.0 psig 0.1" Hg/0.1 psig68935-10 68935-44 15.0 to 15.0 psig 0.1 psig68935-12 68935-46 0 to 15.00 psig 0.01 psig68935-14 68935-48 0 to 30.0 psig 0.1 psig68935-16 68935-50 30.0" Hg vac. to 100.0 psig 0.1" Hg/0.1 psig68935-18 68935-52 0 to 100.0 psig 0.1 psig68935-20 68935-54 30.0" Hg vac. to 199.9 psig 0.1" Hg/0.1 psig68935-22 68935-56 0 to 199.9 psig 0.1 psig68935-24 68935-58 0 to 300 psig 1 psig68935-26 68935-60 0 to 500 psig 1 psig68935-28 68935-62 0 to 1000 psig 1 psig68935-30 68935-64 0 to 3000 psig 1 psig68935-32 68935-66 0 to 5000 psig 1 psig

68935-360 to 30.0 inHg range, NEMA 4X

68935-660 to 5000 psig range, NEMA 4X

Certificate of Conformance

This product is manufactured according to applicable industry standardsand conforms to the manufacturer's engineering, production, calibration,and quality standards.

This product conforms to the customers stated order requirements, includ-ing mechanical and electrical specifications, dimensions, physical itemidentification (part number and serial number).

This product has been tested and calibrated to meet or exceed accuracyspecifications in effect at the time of manufacture using NIST traceablestandards maintained in accordance with ANSI/NCSL Z540-1 and ISO10012.

This product is manufactured in the United States of America

Model

Serial Number

Date Purchased

Purchase Order

Cole-Parmer Battery-Powered Digital Pressure Gauges

04-08

Installation and PrecautionsInstall or remove gauge using wrench on hex fitting only. Do not attempt to tighten by turninghousing or any other part of the gauge. Use fittings appropriate for the pressure range of thegauge. Do not apply vacuum to gauges not designed for vacuum operation. Due to the hard-ness of 316 stainless steel, it is recommended that a thread sealant be used to ensure leak-free operation. NEVER insert objects into the gauge port or blow out with compressed air.Permanent damage not covered by warranty will result to the sensor.

Operation Ranges up to 1999Press the round button on the front of the gauge to activate the display. The gauge will stay onfor approximately 5 minutes. The gauge can be shut off at any time by pressing the buttonagain. For models with display backlighting, the backlighting is on whenever the gauge is on.Turn gauge off when not in use to conserve battery.

Operation 3000 psi, 5000 psi RangesPress and hold the button for approximately 1 second. The full-scale range is indicated, dis-play segments are tested, and the reading and units are displayed. The gauge will stay on for5 minutes.

Power-Up with Zero (gauge reference models only)1. Make absolutely certain no pressure is applied to the gauge. The gauge port should beexposed to normal atmospheric pressure. Note that the zeroing function may only be activat-ed at power-up and the stored zero correction is erased when the gauge is shut off.

2. Press and hold the button.

3. The full-scale range is indicated and the display segments are tested.

4. Continue to press the button until o o o o is displayed and then release the button. This indi-cates that the gauge has been zeroed.

5. The actual pressure is displayed and the 5 minute auto shutoff timer starts.

Attempting to zero the gauge with pressure greater than approximately 3% of full-scaleapplied will result in an error condition, and the display will alternately indicate E r r 0 and theactual measured pressure. The gauge must be powered down to reset the error condition.

Normal OperationFollowing the start-up initialization, the display indicates the pressure reading and the engi-neering units. The 5 minute auto shutoff timer starts when the gauge is powered up or when-ever the button is pushed.

If excessive vacuum is applied, the display will indicate E r r until the vacuum is released.Applying vacuum to a gauge designed for pressure may damage the sensor. If excessive pres-sure is applied (112.5% over range), an out-of-range indication of I or I ... will bedisplayed depending on model.

Models with Display BacklightingDisplay backlighting can be turned on by momentarily pressing the button whenever the gaugeis on. The backlighting will turn on for one minute and then automatically shut off. This alsorestarts the auto shutoff timer.

Shut-DownTo shut off the gauge manually at any time, press and hold the button until the display indi-cates O F F (about 5 seconds) and then release.The display indicates O F F five seconds prior to auto shutoff. The button can be pressed tokeep the gauge on. The auto shutoff and backlight timers are reset whenever the button ispressed and released.

CalibrationAll gauges are factory calibrated on NIST traceable calibration equipment. No calibration isrequired before placing the gauge into service. Calibration equipment should be at least fourtimes more accurate than the gauge being calibrated. The calibration system must be able togenerate and measure pressure/vacuum over the full range of the gauge. A vacuum pump ableto produce a vacuum of 10 microns (0.01 torr or 10 millitorr) or lower is required for vacuumand absolute gauges. It is good practice to install fresh batteries before calibrating battery-powered gauges. Allow the gauge to equalize to normal room temperature before calibration.

Calibration Ranges up to 1999Remove the calibration potentiometer covers on the front of the unit to access the zero andspan controls. Zero calibration must be done before span calibration.

Gauge reference Zero: The gauge port must be open to the ambient with no pressure or vacu-um applied. Adjust the Zero control until the gauge reads zero with the minus () sign occa-sionally flashing. Gauges may be re-zeroed without affecting the span calibration.

Absolute reference Zero: Apply full vacuum to absolute reference gauges and adjust the Zerocontrol until the gauge reads zero with the minus () sign occasionally flashing. Gauges maybe re-zeroed without affecting the span calibration.

Span calibration: Apply pressure or vacuum depending on the type of gauge. Record readingsat three to five points over the range of gauge and adjust span control to minimize error andmeet specifications. Absolute reference gauges display atmospheric pressure when the gaugeport is open to the ambient and it is normal for the reading to fluctuate in response to normalatmospheric pressure changes.

Calibration 3000 psi, 5000 psi RangesRemove the screws on the back of the unit and remove cover and note the locations of the twointernal calibration buttons marked UP and DOWN. These buttons are disabled unless thegauge is in calibration mode.

With the gauge off, press and hold the DOWN calibration button, and also press the front but-ton to power up the gauge in calibratio