TTEECCHHNNIICCAALL MMAANNUUAALL

ISC/OLDHAM Head Office and Factory

Zone Industrielle Est - Rue Orfila - B.P. 417 - 62027 ARRAS Cedex - FRANCE Tel.: 33 (3) 21.60.80.80. – Fax : 33 (3) 21.60.80.00.

E-mail : information@oldham.fr www.groupoldham.com

REF : CD00002 06_MT_BM25_GB_21_11_06

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GAS DETECTION We are delighted that you have chosen an ISC/OLDHAM instrument and would like to thank you for your choice. We have taken all the necessary measures to ensure that your instrument provides total satisfaction. Now it is important to read this document carefully.

EE XX TT EE NN TT OO FF RR EE SS PP OO NN SS II BB II LL II TT YY * ISC/OLDHAM declines its responsibility towards any person for material damage, physical injury or death resulting

wholly or partly from inappropriate use, installation or storage of its equipment resulting from failure to observe instructions and warnings and/or standards and regulations in force.

* ISC/OLDHAM neither supports nor authorises any company, physical or moral person to assume responsibility on behalf

of ISC/OLDHAM , even if it is involved in the sale of ISC/OLDHAM products. * ISC/OLDHAM cannot be held responsible for direct or indirect damage or be required to pay direct or indirect

compensation resulting from the sale or use of any of its products IF THESE PRODUCTS HAVE NOT BEEN DEFINED AND CHOSEN BY ISC/OLDHAM FOR THEIR SPECIFIC USE.

CC LL AA UU SS EE SS CC OO NN CC EE RR NN II NN GG PP RR OO PP EE RR TT YY * Drawings, plans, specifications and information included in this document contain confidential information that is the

property of ISC/OLDHAM * None of this information may be reproduced, copied, divulged or translated, by physical, electronic or any other means, nor

used as the basis for the manufacture or sale of ISC/OLDHAM equipment or for any other reasons without prior consent from ISC/OLDHAM

WW AA RR NN II NN GG SS * This document is not contractually binding. In the interests of its customers, ISC/OLDHAM reserves to modify the

technical specifications of its equipment without notice, in order to improve its performance. * READ THIS MANUAL CAREFULLY BEFORE FIRST USE OF THE EQUIPMENT: this manual must be read by

any person who is or will be responsible for using, maintaining or repairing this equipment. * This equipment will only provide the announced performance levels if it is used, maintained and repaired according

to ISC/OLDHAM directives, by ISC/OLDHAM personnel or by personnel approved by ISC/OLDHAM

GG UU AA RR AA NN TT EE EE 2 years guarantee in normal conditions of use on parts and technical labour, return in our workshops, excluding consumables (sensors, filters, etc.)

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CONTENTS I. PRESENTATION ............................................................................................................. 7

1. POWER SUPPLIES ....................................................................................................................7 General power supply ................................................................................................................... 7

1.1.1. Recharging the battery pack .....................................................................................7 1.1.2. Trickle charge in classified zones.............................................................................7

1.2 Memory backup ................................................................................................................... 7 2. MEASURING CELLS ................................................................................................................8

2.1 Layout of the cells: configuration examples ....................................................................... 8 2.1 Explosimetric, toximetric and oxygen cells ........................................................................ 9

3. DISPLAY UNIT .........................................................................................................................9

4. VISUAL ALARMS.....................................................................................................................9

5. AUDIBLE ALARMS..................................................................................................................9

6. SAMPLING ................................................................................................................................9 6.1. Electrical pumping system .................................................................................................. 9 6.2. Manual pumping system ................................................................................................... 10 6.3. Probe types ........................................................................................................................ 10 6.4. Positioning the BM 25....................................................................................................... 10 6.5. Multigas detection function............................................................................................... 10

7. COM 2100 COMMUNICATION SOFTWARE ......................................................................10

II. UTILISATION ................................................................................................................ 11

1. KEYPAD 11

3. START-UP 12 3.1. Standard start-up ............................................................................................................... 13 3.2. Start-up with choice of reference explosive gas................................................................ 13

4. SWITCHING OFF.......................................................................................................................14

5. DISPLAY BACKLIGHTING.....................................................................................................14

6. SCROLLING STORED PARAMETERS ................................................................................14 6.1 Patrol function................................................................................................................... 14

7. ALARMS 15 7.1. Gas alarms ......................................................................................................................... 15 7.2. Fault alarms ....................................................................................................................... 16 7.3. Alarm acknowledgement ................................................................................................... 17

7.3.1. Gas alarm acknowledgement..................................................................................17 7.3.2. Fault alarm acknowledgement................................................................................17 7.3.3. Automatic alarm acknowledgement .......................................................................17

7.4. Alarm transfer ................................................................................................................... 17 8. MEASUREMENTS....................................................................................................................18

8.1. Display of instantaneous measurements ........................................................................... 18 8.1.1. In "natural diffusion" mode ....................................................................................18 8.1.2 With electrical pumping systems ............................................................................18

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8.1.3 With manual pumping systems ..............................................................................18 8.2 Automatic switch to "0-100% GAS" range ....................................................................... 18 8.3 Storing histogram measurements ...................................................................................... 18

8.3.1 Principle of operation.............................................................................................19

III. SPECIAL INSTRUCTIONS FOR USE IN EXPLOSIVE ATMOSPHERES (ATEX) .................................................................................................................................. 19

1. ATEX ZONES OF USE AND GENERAL RULES.................................................................20

2. INPUT/OUTPUT PARAMETERS...........................................................................................20 2.1. BM 25 recharge connector ................................................................................................ 20 2.2. Connector for alarm/fault outputs and digital on/off inputs.............................................. 20 2.3 External power supply connector ...................................................................................... 21 2.4. Accessories / options connector ........................................................................................ 21

3. MARKING:...............................................................................................................................23

IV. MAINTENANCE ............................................................................................................ 23

1. ACCESS TO MAINTENANCE MENUS ................................................................................24 1.1 Channel programming menu ......................................................................................... 24 1.2 Cell calibration menu...................................................................................................... 26 1.3 Auto-zero menu ............................................................................................................... 26 1.4 Date and time management menu ................................................................................. 26 1.5 Exit menu ......................................................................................................................... 26

V. COM 2100 SOFTWARE ................................................................................................ 26

CONNECTING THE INSTRUMENT............................................................................................27

MAINTENANCE:...........................................................................................................................28

VI. CHARGERS .................................................................................................................... 36

1. PRESENTATION.....................................................................................................................36

2. BATTERY RECHARGE..........................................................................................................37

3. TRICKLE CHARGE.................................................................................................................37

VII. ACCESSORIES............................................................................................................... 37

VIII. SPARE PARTS................................................................................................................ 38

IX. TECHNICAL CHARACTERISTICS........................................................................... 39

1. DESCRIPTION.........................................................................................................................39

2. MEASURING CELLS (NON-RESTRICTIVE LIST) .............................................................42

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II .. PP RREE SS EE NNTT AATT II OO NN

• The BM 25 is a transportable standalone multigas detector that can be used in atmospheres

containing explosive gases as described in the ATEX Directive 94/9/EC. It provides simultaneous detection of up to 5 gases present in the air using specific measuring cells for each gas to be detected. These may be explosive or toxic gases or oxygen.

11 .. POWER SUPPLIES

General power supply

The BM 25 is powered by an interchangeable rechargeable battery pack. Under normal conditions of use the reserve time varies between 75 and 170 hours maximum (100 hours as standard) depending on the configuration. The power supply pack contains a set of NiMH coated batteries (7V2 / 9AH).

1.1.1. Recharging the battery pack

A connector on the side panel is used to recharge the battery pack (see CHARGER chapter) without dismantling.

1.1.2. Trickle charge in classified zones

Another connector is available for an intrinsically safe power supply used to maintain the battery charge level on the BM25 (excluding alarms) for as long as necessary in a classified zone.

1.2 Memory backup

A non-rechargeable lithium battery guarantees storage of data specific to the BM 25 detector (time / history files) when the instrument is not being used (OFF position) or the battery pack (main power supply) is not present. The lithium battery has a maximum lifetime of 2 years from the time when the main battery pack is discharged or the main switch (internal) is set to OFF position. IMPORTANT: The instrument is only certified for use in explosive atmospheres if it is operated

on batteries of the type recommended by the constructor.

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22 .. MEASURING CELLS

2.1 Layout of the cells: configuration examples

Notes:

- The "large cells" are Series 3 or 7 cells produced by City. This is the format, for example, of the compensated butane/hydrogen CO cell.

- If cells are present in locations 2 and 5, the cell in location 5 has priority and deactivates the cell in location 2

- The CO/H2S "combined" cell can only be placed in location 4.

1 : explosimetric cell

2 : small toxic gas / oxygen

3 : small toxic gas / oxygen.

4 : medium toxic gas / oxygen

Medium cells: - oxygen (lifetime of 2 years ) - CO/H2S, SO2, ETO etc… - CO2 IR -

S7/S3 cells - SO2, ETO etc… - CO2 IR or Medium oxygen cell (lifetime of 2 years) -

Small toxic gas cells or Small oxygen cell (lifetime of 1 year)

Explosimetric cell 0 to 100% LEL or explosimetric/catharometric cell 0 to 100% GAS.

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3

4

5

8

2.1 Explosimetric, toximetric and oxygen cells

These removable and interchangeable smart cell blocks are fitted with a catalytic, electrochemical or IR cell and electronic components, including an EEPROM in which ISC/OLDHAM has stored the specific characteristics of the cell (measuring range, various correction coefficients, STEL and TWA alarms, date of manufacture, serial number, etc.).

Another data item called "wear rate" is used by the BM 25 to determine the optimal time to replace the cell.

These cell blocks are also known as "smart blocks". Their positions are described above (Chapter 2.1).

33 .. DISPLAY UNIT

The display unit features an LCD screen and the "FLIP-FLAP" function allowing it to be inverted. It is automatically backlit in the event of an alarm or fault.

It is a graphic display allowing easy reading of measurements.

It displays:

- 5 measurements with an indication of units, type of gas and presence of a catharometric cell

- an indication of channels needing to be calibrated - date and time - min - max - STEL and TWA averages - remaining battery reserve (bar graph) - patrol (operator identification) - maintenance menus - alarm transfers, etc.

44 .. VISUAL ALARMS

A set of indicator lights (20 ultra-bright LEDs) installed on the top of the instrument provides a visual alarm that can be seen from all directions regardless of the work environment.

55 .. AUDIBLE ALARMS

Two very powerful built- in loudspeakers (103 dB at one metre) provide an audible warning when an alarm is triggered.

66 .. SAMPLING

The BM 25 detector can be fitted with a sampling system allowing gas concentrations to be measured in normally inaccessible places or before entering a place where there is a risk of gas pollution (tanks, sewers, tunnels, etc.)

6.1. Electrical pumping system

As an option, the BM25 can be equipped with a built- in electrical pump, powered by the detector's battery pack. The pump delivery rate is between 18 and 25 l/h.

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Note: Whenever an electrical pump is used, carry out a sealing test by blocking the end of the sampling line until the flow alarm is triggered.

6.2. Manual pumping system

Detector BM 25 can be fitted with a cover specifically designed for connecting a pipe and probe.

6.3. Probe types

The "manual" or "electrical" sampling systems can be equipped with various probes: - Rigid probe - Semi-rigid probe - Telescopic probe

CAUTION: The semi-rigid probe cannot be used in explosive atmospheres as it may cause sparking through electrostatic discharge. Manual sampling devices, hoses, squeeze bulbs and some probes are not antistatic. The user must ensure that no dangerous discharge can occur when using a metal probe.

6.4. Positioning the BM 25

The operator can:

• either continue with his work leaving the BM 25 to monitor the atmosphere, • or take spot measurements using a sampling system (manual or electrical).

6.5. Multigas detection function

The BM 25 must be positioned vertically.

Depending on the type of gas to be detected or likely to be present, the instrument is placed:

• on the ground for detection of heavy gases (density > 1) • at medium height (roughly 1 metre) or at a vent for general detection of a maximum

number of gases or oxygen monitoring. • mounted on the optional tripod for greater visibility from several different places.

77 .. COM 2100 Communication Software

This software is used for supervision and maintenance of the BM 25:

- text display of measurements and channel parameters - fault diagnostic support - programming of the BM 25 and the measurement channels - option management - channel calibration by automated scrolling menu - printout of status and check sheets - management, display and printing of events and stored measurements - protection by password.

The link between the BM25 and the computer is made using an infrared adaptor which plugs into the side of the instrument. Two versions are available: - adaptor for COM port (serial) - adaptor for USB port.

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II II .. UUTT II LL II SS AATT II OO NN

1. KEYPAD

The keypad has low-deformation "piezo" buttons which need to be pressed quite firmly. It is used to:

• start up or shut down the instrument • select the read mode on the display • acknowledge the audible gas alarm • select backlighting (automatically deactivated after 15 seconds) • scroll the parameters • select menus during the utilisation phase • access Maintenance level • validate.

2. MEASUREMENT READING

The gas concentration measured by each cell in operation can be read on the alphanumerical display. This display is divided into four independent zones, each corresponding to a measurement channel: This allows a maximum of four measurements to be displayed simultaneously. In each zone the measurement is displayed as follows:

• measurement • measuring unit • gas symbol • for configuration of 5 gases, channel 5 is displayed in alternation in zone 3 of the

display. The time is also indicated at the bottom of the display.

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Note: If the instrument is placed on the ground, the screen information can be easily read without lifting the detector or crouching down. Using the "FLIP-FLAP" function, the display unit can be inverted. The display content is then "upside down". The operator stands behind the BM25 and tilts the detector by pulling the handle towards him. A clear display is directly visible. This operation is carried out by holding down the "acknowledge audible alarm" button for 3 seconds (key on the left).

33 .. SSTT AARRTT --UUPP

IMPORTANT: To avoid any accidental start-up during delivery, the BM25 has been shipped with the general switch in OFF position. At first start-up lift the rear cover of the BM25 and set the switch to ON. During its first start-up, and also after remaining inactive for more than a month, the detector must be charged, discharged and totally recharged before use. In addition, you are reminded that a gas test must be carried out on any portable gas detector before going to the site. REMINDER: Before starting up the BM25, check that the required cells are connected. The user can choose between two start-up procedures:

• a standard procedure, used in most cases, • a procedure allowing the reference explosive gas to be selected: this is useful when

checking for a particular gas (town gas, butane, etc.).

Switch

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3.1. Standard start-up

• Press the "ON/OFF/ENTER" key briefly: • the detector runs a series of visual and audio tests for a few seconds and displays:

­ the ISC/OLDHAM logo ­ the version of the "instrument" software, code date and serial number (depending on

the product version chosen by the customer) ­ pre-programmed alarm thresholds for each measuring channel (depending on the

product version chosen by the customer) ­ the measurements.

Note: When the BM 25 is operating, a brief visual signal informs the user that it is operating correctly. This function can be cancelled or the interval between each signal modified.

3.2. Start-up with choice of reference explosive gas

Keep the "Backlight" or "Acknowledge" key pressed.

• Start up the detector by pressing the "ON/OFF/ENTER" key • Release both keys • For a few seconds the ISC/OLDHAM logo appears on the display while the selftests run • After this it displays the list of pre-programmed gases, with the currently validated gas in

the dark area.

Selecting a new reference gas:

• Each time the "acknowledge" key is pressed, the list scrolls downwards and each time the "backlight" key is pressed it scrolls upwards. 31 reference gases in the range 0-100% LEL (or 0-5% volume CH4) have been pre-programmed. The 32nd key (Other gas) is used to select a gas corresponding to the user's particular situation; the data for this gas are entered in the workshop.

• Validating the selection: when the selected gas is displayed, press the "ENTER" key.

The detector switches to "Testing" mode as described in the previous chapter, before switching to the working phase. The gas that has just been selected is now the reference explosive gas. If the user does not validate a gas, after a certain time the BM 25 switches to test phase, running normal scanning without changing the reference gas. In other words, it aborts the procedure.

• If the tests detect a problem, the detector switches to alarm mode (rapid pulsed audible

signal and flashing warning light), • If no problem is detected during the tests the BM 25 is ready for use.

CALIBRATION REMINDER

If the calibration date has been exceeded, the BM 25 activates a calibration reminder on the channel concerned. This reminder can be acknowledged and the BM 25 can still be used but calibration remains compulsory.

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4. SWITCHING OFF

To switch off the BM 25, hold down the "ON/OFF" key for three seconds. During this time, a countdown (OFF 3,2,1) appears at the bottom of the display before the BM 25 switches off. Stored values (cell setting data, alarm thresholds, histogram, etc.) are not lost after switching off. On return to the workshop, it may be useful to recharge the batteries or print out the histograms.

5. DISPLAY BACKLIGHTING

In a dimly lit environment measurements can be read more easily by pressing the "Backlight" key. This activates the display backlighting to allow easier data reading. It is automatically deactivated after fifteen seconds. Since the BM 25 has "intrinsically safe" approval, the backlight function can be used in dangerous environments, i.e. with explosive gases present, . Display backlighting is automatically activated in the event of an alarm or fault.

6. SCROLLING STORED PARAMETERS

In normal operating mode, the user can look up stored data concerning gas measurements or internal data concerning the BM 25 (remaining battery reserve, date and time). With the BM 25 in normal operating mode, press the "backlight" key repeatedly to scroll the parameters for each measurement channel

- display backlighting and date display - current location: name (currently used) and time. This line will be displayed if the BM

25 has the patrol option - remaining battery reserve (bar graph) - indication of minimum values detected by each cell - indication of maximum values detected by each cell - STEL of each "toxic" channel - TWA of each "toxic" channel - The message "Enter the maintenance code": to access maintenance menus, enter the 4-

digit code using the "acknowledge" and "backlight" keys - If an incorrect code is validated the normal display returns. - To leave the list before the end: press the "acknowledge" key.

6.1 Patrol function

If the BM 25 has the patrol function, a list of names can be pre-programmed using the COM 2100 software and looked up manually via the keypad.

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When "current location" and the user name are displayed in the parameter list it is possible to validate another name as follows:

- current location / name - enter - scroll down or up the pre-programmed list using the "acknowledge" and "backlight"

keys - enter (to validate the new name) - acknowledge (to return to normal mode)

6.2 Reinitialising MIN/MAX values

Press "acknowledge" and "backlight" simultaneously.

7. ALARMS

The BM25 has two types of warning device:

- Visual: text messages on the display, 360° red visual alarm visible from all directions - Audible: two powerful loudspeakers (103 dB at 1 m).

7.1. Gas alarms

Depending on the programming and type of gas, "gas alarms" are triggered when a pre-set value is exceeded:

• Two instantaneous thresholds per channel for explosive / toxic gases or oxygen.

• High and low thresholds on the oxygen channel (2 low thresholds as option).

• One instantaneous threshold on the catharometric channel.

• Short-term exposure limit (STEL), corresponding to a sliding average over 15 minutes (depending on the country) for each channel equipped with a toxic gas cell.

• Time weighted average (TWA), corresponding to a sliding average over 8 hours for each

channel equipped with a toxic gas cell.

Common warning lights for gas alarm, transferred alarm and fault

Types of alarm: Gas 1 alarm: two-tone Gas 2 alarm: fast two-tone Transferred alarm: slow two-tone Fault: single-tone

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As soon as the pre-defined alarm thresholds are exceeded on any channel, the detector emits a pulsed audible signal and light signal (red flashing light). The alarm message or messages appear on the display (FAULT, ALARM, TWA, STEL, min. etc.) together with the measurement value in the corresponding field. If an alarm occurs, the BM 25 displays the maximum value detected until the alarm is acknowledged.

7.2. Fault alarms

There are two categories of faults:

• Faults concerning cells: Outside range, Worn cell, Calibration request if there is considerable deviation during auto-adjustment. These faults generate individual messages appearing in the display quadrant concerned and also trigger a visual alarm (continuous, fully- lit red warning light) and a continuous audible alarm.

• Faults concerning the detector itself (discharged batteries or electronics fault). The

corresponding fault message appears at the bottom of the display. It has priority over all other messages concerning cells.

Examples of information that may be brought to the user's attention. v Battery pre-alarm

• Charge the batteries. • The reserve time is roughly 20 minutes, after which the BM 25 will shut down

automatically. • Measurement continues during this phase.

This alarm cannot be acknowledged: only the audible signal can be cancelled. • Battery fault: Measurement stops, fault cannot be acknowledged.

v " > 100%LEL: Outside range" for explosimetry

• Only concerns an explosimetric channel without catharometric cell • Consequences:

­ the display is blocked in the quadrant concerned ­ the continuous audible signal cannot be acknowledged ­ the general warning lights are activated continuously ­ the explosimetric cell power supply is cut to protect the cell

• To return to normal operating conditions, the BM25 has to be switched off and restarted. • Any movement in the zone requires the greatest caution since potentially explosive gases

are present in a concentration greater than the LEL.

v "Outside range" TOX

• 20% over alarm in negative mode, with display of the negative value • 120% over alarm in toxic gas and oxygen mode. • This alarm can be acknowledged.

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7.3. Alarm acknowledgement

7.3.1. Gas alarm acknowledgement

The gas alarm itself is not cancelled: only the accompanying audible signal is cancelled. After pressing the "acknowledge" key

The audible alarm stops but the warning light will flash until the measurement drops below the programmed alarm threshold. Once the measurement is within the set limits, the visual signal will deactivate automatically.

In default configuration, the audible alarms are automatically reactivated after a certain time if the presence of gas persists.

7.3.2. Fault alarm acknowledgement

With the exception of the battery pre-alarm, fault alarms cannot be acknowledge. Fault alarms are automatically deactivated once the fault has disappeared. Special case: a range overrun alarm for toxic gases is acknowledged manually but a "negative overrun" alarm for toxic and explosive gases is acknowledged automatically when the fault disappears.

7.3.3. Automatic alarm acknowledgement It is possible to programme automatic clearance of all alarms, without pressing the acknowledge key, once the concentration of the gas concerned is below the pre-programmed alarm threshold.

7.4. Alarm transfer

The BM 25 is equipped with two "static" relays: a "gas" alarm relay common to all the channels and a "fault" alarm relay common to all the channels. The COM 2100 software is used to configure the alarm relay for the required use.

The BM25 is also equipped with two on/off inputs:

- one input dedicated to remote acknowledgement - one input dedicated to alarm triggering.

These inputs can also be configured using COM 2100.

Several BM 25s can be interconnected in order to transfer an alarm from one to another or trigger an alarm manually.

IMPORTANT: Parameters to be observed at relay outputs

AC I peak Max 150 mA - V max 30V

DC I Max 150 mA - V max 30 V

2 relay outputs (fault and gas) and 2 on/off relays (remote acknowledgement and alarm transfer)

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Caution: If the BM 25 is used in an explosive atmosphere, the relay output parameters must always be taken into consideration to ensure that the use of the contact does not compromise the intrinsic safety of the instrument. This is the responsibility of any user connecting an external circuit unknown to ISC/OLDHAM. The parameters are given in the paragraph "Special instructions for use in an ATEX zone".

8. MEASUREMENTS

8.1. Display of instantaneous measurements

8.1.1. In "natural diffusion" mode

All instantaneous gas measurements are displayed continuously. The display is divided into four independent fields (quadrants). This allows the user to read:

• the continuously displayed measurement • the measuring unit preceding the gas symbol

8.1.2 With electrical pumping systems

• Wait for measurements to stabilise before taking them into account. During pumping they will be either overestimated (explosive gases) or underestimated (oxygen) because of air movement.

• With the electrical pump, wait a few seconds before reading the measurement. Any anomaly on the pumping system with be reported by the audible alarm and the display.

8.1.3 With manual pumping systems

Wait for measurements to stabilise before taking them into account. During manual pumping with a squeeze bulb they will be either overestimated (explosive gases) or underestimated (oxygen) because of air movement and the purge of the system.

8.2 Automatic switch to "0-100% GAS" range

With an "explosimetric/catharometric" cell, the BM 25 automatically switches from the "0-100% LEL" range to the "0-100% GAS" range for measurement of explosive gases when the measurement is greater than 100%LEL of the selected reference gas. The essential configuration for correct operation is an explosimetric/catharometric cell + an oxygen cell If everything is correct, "K" will be displayed.

8.3 Storing histogram measurements

Some versions of the BM25 can store measurements so that they can be recovered later on a computer. The "Histograms" function allows computerised editing of values and events stored by the BM25 during its operating period (at a workstation for example). Data in the histogram memory can only be reset on a computer. Switching off the detector does not effect data storage

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8.3.1 Principle of operation

To make the best use of edited data when the histogram is printed, the principle of data storage must be understood.

Stored information: The BM25 stores information batches at start-up and then in regular cycles. Each of these batches or frames (with their pre-programmed characteristics) has the same structure. A frame contains:

• Information on the measuring channels • Average concentration measurements over a configurable storage duration for each

sensor operating • Events on each channel:

- Resetting - Faults - Instantaneous or average-based alarms - Types of maintenance requested (programming, calibration, replacing a cell) - Date and time, - Battery level - Auto-adjustment request - Maintenance function request.

Storage capacity

The number of measurements, and therefore the operating times, depends on the BM25's memory capacity. As a guide, it can store roughly 200,000 measurement points.

If the amount of data to be stored exceeds the BM25's storage capacity, the oldest data are lost: the cleared memory allows new data to be stored. Data storage duration

Data stored by the BM25 remain in the memory even if the instrument is not used for long periods.

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The information contained in the following paragraphs must be taken into account and applied by the manager of the site where the equipment is installed. Refer to the requirements of European Directive ATEX 1999/92/EC relating to the improvement of safety and health protection for operators exposed to the risks of explosive atmospheres.

For intrinsic safety installations, and especially for connections to the BM25, you are reminded that the manager of the IS installation, known as the "system designer', must prepare a system document demonstrating that the entire "BM25 – Cable – Peripheral device" system is intrinsically safe. To prepare this document, refer to standard EN 50039 for group II and standard EN 50394-1 for group I.

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Compliance with the Essential Safety and Health Requirements is based on conformity with the following standards:

- EN 50014 of June 1997 + amendments 1 and 2 - EN 50018 of November 2000 + amendment 1 - EN 50020 of June 2002 - EN 50284 of January 1999 - EN 50303 of July 2000

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The BM25 can be used in explosive atmospheres of Group II surface industries and Group I gassy mines.

The ambient operating temperature range is –20°C to + 55°C.

Depending on the type of cells used, the BM25 is classified in the following categories:

a) Instrument equipped with any type of cell block except an infrared block - Surface industries: Category 1G, use in zones 0, 1 or 2 - Gassy mines: Category M1, use in zones with any concentration of gas

b) Instrument equipped with any type of cell block and an infrared block

- Surface industries: Category 2G, use in zones 1 or 2 - Gassy mines: Category M2, use below a gas limit value

The following operations are forbidden in explosive atmospheres:

- opening the instrument: includes cell cover and rear cover - recharging the batteries - connection to a computer

All repair, adjustment or maintenance operations must be carried out by duly qualified personnel.

The battery pack must be replaced by an original spare part recommended by the constructor.

2. Input/Output Parameters

2.1. BM 25 recharge connector

It is recommended to use the charger supplied by ISC/OLDHAM outside an Atex zone.

If the BM 25 is recharged using a charger other than the one supplied by ISC/OLDHAM, its characteristics must not exceed a voltage of 30 VDC and a current of 30 A.

2.2. Connector for alarm/fault outputs and digital on/off inputs

The input characteristics of opto- isolated static relay contacts integrated in the BM 25 are:

U in = 30 V max I in = 150 mA max

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The characteristics of digital on/off inputs integrated in the BM 25 are:

U out = 5 V max I out = 50 mA max L out = 8 mH C out = 7 µF Only potential- free circuits can be connected to the digital inputs, i.e. Uin=0V and Iin=0A.

Caution: The circuits above are separated intrinsic circuits. Cables connected to the terminals of these circuits must comply with the requirements of intrinsically safe circuit wiring concerning: type of cables, insulation voltage, insulation, capacity and inductance per unit length. Refer to national and international standards, for example EN 60079-14.

A system document must be prepared by the installation manager, as explained above.

2.3 External power supply connector

The output characteristics of each external power supply connected to the BM25 are:

- Either: Po=0.81W Uo =28V Io=115 mA Lo=2 mH Co=0.08µF For example, the 5302B power supply unit from Pr Electronics

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- Or: Po=1.3W Uo =23.5V Io=160 mA Lo=1 mH Co=0.132µF

For example the BXNE01 power supply unit from Georgin.

I (M1) II (1) G/D [ EEx ia ] I [ EEx ia ] IIC LCIE 02ATEX6104X) The characteristics of the external power supply connectors of the BM25 are Co=0 and Lo=0.

The connector can receive two external power supplies provided the rules in the previous paragraph are observed.

2.4. Accessories / options connector

The drawing on the following page shows the various connection possibilities on the BM25. The connectors are situated on the sides of the instrument. Note: Blank plugs must be fitted on unused connectors.

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V+ Charge 1 top-up

V+ Charge 2 top-up V- Charge 1 top-up

1

2 3

4 V- Charge 2 top-up

1

2

4

3

V- Charge V+ Charge 65

4 3

2 1

7

Logical input earth

Logical input: alarm acknowledgement

Logical input: Alarm transfer

+ contact Alarm relay

- contact Alarm relay

+ contact Fault relay

- contact Fault relay

65

4 3

2 1

7

REAR

FRONT

ELECTRICAL CONNECTION IDENTIFICATION OF BM25 CONNECTORS

Above

To ISC/OLDHAM charger (forbidden to connect

External power supply for trickle charge of BM 25 power pack

Not used

IS parameters: - Alarm contact: Static relay type: Vin=30VDC, Iin=150 mA, no condition on L and C - External trickle charging supply: P in=1.3W, U in =23.5V, I in=160 mA, no condition on L and C - Logical input: U out = 5 V, I out = 50 mA, L out = 8 mH, C out = 7 µF

Note: The installation manager must prepare the IS system document (see BM25 Manual)

Relay outputs and logical inputs

22

3. MARKING:

ISC/OLDHAM Arras CE 0080

BM25 IP66 Tamb : -20°C +55°C

II 1G / I M1 EEx ia IIC T4 / EEx ia I

With IR cell block

II 2G / I M2 EEx ia d IIC T4 EEx ia d I

INERIS 05ATEX0044 Do not open in explosive atmospheres Serial number

Year of build

II VV .. MM AA II NNTT EE NN AA NNCC EE

Gas detection instruments are potential life-saving devices. Recognizing this fact, Industrial Scientific Corporation recommends that a functional “bump” test be performed on every portable gas-monitoring instrument prior to each day’s use. A functional test is defined as a brief exposure of the detector to a concentration of gas(es) in excess of the lowest alarm set-point for each sensor for the purpose of verifying sensor and alarm operation and is not intended to be a measure of the accuracy of the instrument. Industrial scientific further recommends that a full instrument calibration be performed using a certified concentration(s) of calibration gas(es) monthly to ensure maximum accuracy. If an instrument fails to operate properly during any functional “bump” test, a full instrument calibration should be performed successfully prior to use. These recommendations are based on safe work procedures, indus try best practises, and regulatory standards to ensure worker safety. Industrial scientific is not responsible for setting safety practices and policies. IMPORTANT: A maintenance reminder is programmed into BM25 detectors in the factory. It appears automatically after 12 months if calibration has not been carried out ("Re-CAL" appears on the screen The operations explained in this section may affect the reliability of detection and must only be carried out by authorised and qualified personnel.

23

11 .. AACCCCEESSSS TT OO MM AAII NNTT EENNAANNCCEE MM EENNUUSS

With the BM25 operating, the menus are accessed using the following procedure:

• Scroll through the parameters using the middle key until a request for an access code appears.

• By default, the access code is 0018. Use the "backlight" key to scroll the digits, select the required digit with the "acknowledge" key and finally validate the access code using the ENTER key.

The list of available menus then appears:

- programming - calibration - auto-zero - date and time - exit

1.1 Channel programming menu

This menu is used to:

• Select the channel to be programmed • Start up or shut down the selected channel • Inform the operator of the type of cell for the measuring range • For an explosimetric cell (1) select the type of reference gas from the 31 pre-selected

gases or enter the coefficient of a 32nd gas and programme the instantaneous thresholds

• For an oxygen cell, programme the minimum and maximum alarm thresholds or 2 minimum thresholds if this option has been validated.

• For a toxic gas cell, programme the instantaneous thresholds. • For a catharometric cell, programme the instantaneous low threshold.

(1) Table of explosive gases and pre-programmed coefficients

The explosimetric cell on the BM 25 is a thermocatalytic "Wheatstone bridge" cell. The coeffic ients are given for information on the basis of the CH4 scale with LEL of 5.0% (the BM 25 takes them automatically into account during calibration / range changes).

24

Gas Empirical

Formula

LEL1 UEL2 Vapour

density

Coeff. /

CH4

Recommended

calibration gas

Abbre-

viation

Acetone C3H6O 2.15 % 13 % 2.1 1.55 But/Prop ACO

Acetylene C2H2 1.5 % 100 % 0.9 1.1 But/Prop ACY

Butadiene C4H6 1.4 % 16.3 % 1.85 1.25 But/Prop BUD

Butane C4H10 1.5 % 8.5 % 2.0 1.8 But/Prop BUT

Butanone C4H8O 1.8 % 11.5 % 2.5 1.75 But/Prop BUN

Dimethylether C2H6O 3.0 % 27.0 % 1.6 1.55 But/Prop DIM

Ethanol C2H6O 3.3 % 19.0 % 1.6 1.15 But/Prop ETA

Ethyl acetate C4H8O2 2.1 % 11.5 % 3.0 1.35 But/Prop EAC

Ethylene C2H4 2.7 % 34.0 % 0.98 1.0 But/Prop ETY

Ethylene oxide C2H4O 2.6 % 100 % 1.5 2.1 But/Prop ETO

LPG Prop+But 1.65 % ∼ 9.0 % 1.85 2.05 But/Prop LPG

Gas oil Mixture 0.6 % ∼ 6.0 % > 4 5.00 But/Prop GSL

Gasoline (premium) Mixture 1.1 % ∼ 6 % 3 to 4 3.0 But/Prop LFP

Natural gas CH4 5.0 % 15.0 % 0.55 1.05 CH4 NG

Hexane C6H14 1.2 % 7.4 % 3.0 2.36 But/Prop HEX

Hydrogen H2 4.0 % 75.6 % 0.069 0.70 But/Prop H2

Isobutane C4H10 1.5 % ∼ 15 % 2.0 1.6 But/Prop ISB

Isopropanol C3H8O 2.15 % 13.5 % 2.1 1.6 But/Prop ISP

5.0 % 1.00 M ethane3 CH4

4.4 %

15.0 %

15.0 %

0.55

1.14

CH4 CH4

M ethanol CH3OH 5.5 % 44.0 % 1.1 1.0 But/Prop MTL

Methylamine CH3NH2 4.9 % 20.7 % 1.1 1.05 CH4 MAM

Propylene oxide C3H6O 2.3 % ? 2.0 2.0 But/Prop PRO

Pentane C5H12 1.4 % 8.0 % 2.5 1.70 But/Prop PNT

Propane C3H8 2.0 % 9.5 % 1.6 1.4 But/Prop PRO

Propylene C3H6 2.0 % 11.7 % 1.5 1.2 But/Prop PRY

Toluene C7H8 1.2 % 7.0 % 3.1 2.05 But/Prop TOL

White Spirit Mixture 1.1 % 6.5 % > 2 5.0 But/Prop WSP

Xylene C8H10 1.0 % 7.6 % 3.7 2.5 But/Prop XYL

1 Lower explosive limit 2 Upper explosive limit 3 The value adopted for the LEL of methane varies between countries. We give two

different CH4 ranges (LEL = 4.4 % and LEL = 5.0 %) to take account of this. If the explosive gas that you want to detect is not in the list above, it is possible to use

the "Other gas" window with a coefficient validated by ISC/OLDHAM (contact us).

25

1.2 Cell calibration menu

This menu is used for regular calibration of cells installed in the BM 25. Calibration involves setting the cell zero in clean air (free of gases that could be detected by the BM 25), and setting the sensitivity with a reference gas whose characteristics are known. The flow rate for calibration is 60 l/h. If you are an authorised user, access the calibration menu and follow the menu instructions in manual mode.

1.3 Auto-zero menu

This menu is used for automatic and simultaneous zero setting of every cell used in the BM 25. Caution: When using this menu, you must ensure that you are in clean air!

1.4 Date and time management menu

This menu is used to set the internal calendar and clock of the BM 25 to the correct date and time. This information is used to define the time scales, especially during printing or transfer of stored measurements (min., max., STEL, TWA) to an external PC. Loss of date and time The electronic circuits managing the date and time are powered by an independent lithium battery if the main battery is completely discharged or if the general switch is set to OFF. The estimated lifetime of this lithium battery is 2 years. The user is warned of low battery level by the message "battery fault" before all the stored data are lost. The battery must be replaced. CAUTION: This operation must only be carried out by ISC/OLDHAM personnel or personnel authorised by ISC/OLDHAM.

1.5 Exit menu To return to normal user mode.

VV .. CC OO MM 22 11 00 00 SS OO FF TT WW AA RR EE

The COM2100 software is used for supervision and maintenance of the BM 25:

- text display of measurements and channel parameters - diagnostics support in the event of a failure - programming of the instrument and measurement channels - option management - calibration of the channels by automated scrolling menu - editing of status and check sheets - management, display and printing of events and stored measurements - protection by password.

A serial or USB infrared adaptor cable is used for the link between the BM 25 and the PC.

Once installation is complete and the equipment is operating, a series of user- friendly screens takes you through the operations. Some examples are given below.

26

Home screen

CCoonn nneecc tt iinn gg tt hhee iinnss ttrruummeenn tt

NB: The COM 2100 software automatically detects whether the instrument is an MX2100 or BM25 and the appropriate screens will appear.

27

- Programme the required communication parameters (port, speed, language). - Click on "Connect".

MMaa iinntt eennaa nnccee::

The Maintenance window provides access to the menus shown on the screen capture below. The default password required for the menus is 1000

28

PROGRAMMING

1/ Channel programming: - Access is controlled by code. - Select the required configuration: the first column "Start-up" (top left) indicates the activated

and deactivated measurement channels; the second column "Presence" (to the right of the first) indicates the cells that are present in the system.

- Click on "Confirm channel programming". 2/ Alarm and threshold programming: - Click on the "Channel selection" tab. - Modify the alarm threshold values. - Confirm by clicking on "Confirm alarms". 3/ Programming the combustible gas: - Access is controlled by code. - If necessary, change the selected combustible gas: - Choose another gas from the list and click on "Explosive gas programming".

29

- Click on "Exit".

CALIBRATION

- Select the cell to be calibrated. - Programme the maintenance interval if

appropriate. - Indicate the concentration of the reference gas

used. - Follow the software instructions to set the zero. - Set the sensitivity, not forgetting to indicate beforehand (in red) the concentration of the

reference gas that will be injected.

- If everything is correct, the following messages appear:

30

DATE AND TIME UPDATE FROM THE PC TO BM 25

The BM 25 internal clock can be updated directly by the PC clock.

- Click on "OK" to validate.

CHECK SHEET

A printable check sheet can be created: - Complete the fields (user information for

example); - Create the check sheet (.ctr file) - Open the PC (from the COM 2100 files) to display or print the file. - Examples:

31

- Click on "Read only".

32

- Printable version of the certificate. - This document can be personalised by changing the headers (your company name, etc.).

33

STATUS SHEET

- Follow the same procedure as above (.etx files). 4/ Configuration of the alarm relay and logical inputs on a BM25: - Complete the table that appears on the screen by clicking on the windows concerned and

configuring according to the required use of the alarm relay and logical inputs. - Finally, click on "OK" to validate.

- column for programming alarm - column for programming logical relay activation inputs.

For activation of the internal alarm relay by an external alarm

Remote acknowledgement: to acknowledge a BM 25 alarm using a remote button (closing a contact).

Logical input: Alarm

Logical input: Acknowledgement

Type of alarm, visual indications:

- alarm 1 = slow - alarm 2 = fast - transferred alarm

= very slow.

Local acknowledgement: to acknowledge a transferred alarm manually from the BM25 keypad.

34

SCREENS

- The "SCREENS" window is used to view histories, faults, measurements and the

configuration of the instrument at purchase. - It is also used to change the BM25 maintenance access code (default code 0018) and the

software access code (default code 1000). - A patrol function list can be created and employed later by users. It can be used to

produce histograms recording a date/time and a name (of a place or user). - To create a list of names:

35

- Type a new name in the "Enter a new operator" box. - Confirm it by clicking on "Confirm the new operator". - The name appears automatically in the "List of stored patrol operators" area. - Click on the name (in blue). - Place it in the right-hand area "List of patrol operators recorded in the instrument" by

clicking on the move-right arrow (>). - Individual names or a complete list of names can be moved from left to right or right to left

using the single or double arrows. - Click on OK to load the new list on the BM25.

VV II .. CC HH AA RR GG EE RRSS

11 .. PPRREESSEENNTT AATT IIOONN

Built- in smart charger with 12 VDC to 30 VDC power supply compatible with use in a car or truck. A 110 VAC / 230 VAC adaptor is used for recharging from the mains.

Charge connector

36

22 .. BBAATTTT EERRYY RREECCHHAARRGGEE

The battery charge time is 4 hours 30 minutes.

33 .. TT RRIICCKKLLEE CCHHAARRGGEE

The BM25 has a "charge top-up" connector, located immediately next to the mains charge connector. Using one or two intrinsically safe power supplies, the battery charge (excluding alarms) can be maintained while the BM25 remains operational in a classified zone. Characteristics of an IS power supply for trickle charging:

- Io ≤ 160mA - Pmax= 1,2W Maximum cable resistance = 16 Ohms i.e. a maximum cable length of 500 m for 1.5 mm² cable.

Boost charge connector

VV II II .. AA CC CC EE SS SS OO RR II EE SS

REF. NAME

6 511 154 220 VAC charger for BM25 / Charge time 4 hr 30 mn WCHMUBM Wall-mounted charger for BM25

6 321 390 Support for BM25 wall-mounted charger

WLOG210 COM2100 software kit with infrared/COM cable WLOGUSB COM2100 software kit with infrared/USB cable

6 314 588 IR / USB connection cable 6 314 583 IR / COM connection cable

6 331 159 Calibration and (manual) gas sampling pipe 6 327 920 Sampling kit with rigid probe for pump 6 327 919 Sampling kit with semi-rigid probe for pump (cannot be used in classified

zone) 6 327 918 Sampling kit with telescopic probe for pump 6 327 921 Manual sampling kit with crystal tube (4 m) 6 327 922 Manual sampling kit with telescopic probe 6 327 923 Manual sampling kit with semi-rigid probe (cannot be used in classified zone) 6 327 924 Manual sampling kit with rigid probe

6 321 388 Tripod

37

TRICKLE CHARGE KIT

6111303 IS POWER SUPPLY 6153027 CONNECTOR

> see below for cable ALARM TRANSFER KIT

6152816 Individual CONNECTOR (NB: 2 connectors are required) > see below for cable CHOICE OF CABLE

If the BM25 configuration does not include both EXPLOSIMETRIC and CO2 cells: Use BLUE INSTRUMENTATION CABLE, TYPE 01 IP 09 EGSF If the BM25 configuration does include both EXPLOSIMETRIC and CO2 cells: Use 2 INTRISINCALLY SAFE POWER SUPPLIES

1 CONNECTOR BLUE INSTRUMENTATION CABLE 03 IP 05 EISF

VV II II II .. SS PP AA RR EE PP AA RRTT SS

EXPLOSIMETRIC cells

6 313 888 EXPLOSIMETRIC cell, range 0-100% LEL

6 313 889 EXPLOSIMETRIC / CATHAROMETRIC cell, range 0-100% LEL and 5-100% vol. CH4 for BM25 only (also available in H2 version)

MEDIUM cells 6 313 780 O2 cell (medium format) (lifetime 2 years) 6 313 823 Combined CO / H2S cell 6 313 818 CO2 cell, 0-5% vol 6 313 857 NO2 cell, 30 ppm 6 313 843 Cl2 cell, 10 ppm 6 313 821 ETO cell, 0-30 ppm

6 313 819 SO2 cell, 0-30 ppm

6 313 822 SO2 cell, 0-100 ppm

6 313 841 ClO2 cell, 0-3 ppm

TOXIC GAS / O2 SMALL cells

6 313 817 O2 cell, (lifetime, 1 year minimum) 6 313 787 CO cell, 1000ppm 6 313 826 CO cell, 2000 ppm

38

6 313 788 H2S cell, 100ppm 6 313 816 H2S cell, 0-30ppm Special version for hydrocarbons 6 313 799 NH3 cell, 100 ppm 6 313 800 NH3 cell, 1000 ppm 6 313 801 NO2 cell, 30 ppm 6 313 802 NO cell, 300 ppm 6 313 803 H2 cell, 2000 ppm 6 313 804 HCl cell, 30.0 ppm 6 313 805 HCN cell, 30.0 ppm 6 313 806 HF cell, 10 ppm 6 313 807 O3 (Ozone) cell, 1 ppm 6 313 808 SIH4 (Silane) cell, 50 ppm 6 313 809 Cl2 cell, 10.0 ppm 6 313 810 PH3 (Phosphine) cell, 1 ppm 6 313 811 AsH3 (Arsine) cell, 1 ppm 6 313 812 COCl2 (Phosgene) cell, 1 ppm 6 313 820 F2 cell, 0-1 ppm 6 313 879 N2H4 cell, 0-1ppm

6 313 832 Batch of 2100 TOX/O2/EXPL dummy cells

Remark: This list is not restrictive and may be updated. Cells must be stored in a cool place (5°C).

II XX .. TT ee cc hh nn ii cc aa ll CC hh aa rr aa cc tt ee rr ii ss tt ii cc ss

11 .. DDEESSCCRRIIPPTT IIOONN

Manufacturer: ISC/OLDHAM

Function: Multi-risk gas detector

Type: BM 25 Configuration:

• One to four cells (explosimetric, electrochemical, infrared (CO2) or catharometric cells) Gases detected: Explosive / toxic gases and oxygen Measurement: continuous measurement by all cells in operation Cells:

• Interchangeable, pre-calibrated smart cell blocks • EEPROM allowing automatic recognition by the instrument

Display:

• Graphic LCD

39

• Text messages, with backlighting • Flip-flap function

Display backlighting: automatic time-out Explosimetric range switching

• Automatic from the "% Gas" scale to the "% Volume" scale

Cell fault • Indicated by warning light • Text message • Corresponding display freezes Other channels operational • Continuous audible and visual general alarm

Battery fault:

• Text display • Continuous audible and visual general alarm

Operating check

• Self-test at start-up • Visual signal every 2 minutes (factory setting) • Text display of measured values

WARNINGS

• Explosimetry: two adjustable instantaneous thresholds over the 0-60% LEL range • Oxygen measurement: two instantaneous thresholds adjustable over the full

measurement scale of the cell (excess oxygen and insufficient oxygen) or two "insufficient oxygen" thresholds

• Toximetry (for each cell): • Two instantaneous thresholds adjustable over the full scale

- one TWA threshold - one STEL threshold

Alarm information • General audible and visual alarm (display, warning light) • Text display of the fault or alarm on the channel concerned

Inputs/Outputs (options)

• Infrared RS232 link • On PC, maintenance and supervision software, EXCEL database • One alarm relay output • One fault relay output • One logical input for alarm triggering • One "logical" input for remote acknowledgement

Support software

• COM 2100 maintenance software

Power supply • Coated NiMH battery pack

Battery reserve time (excluding alarms)

• 70 hours with Explosimetric and CO2 cells

40

• 100 hours with Explosimetric and Toxic gas cells • 170 hours with Toxic gas cells

Charge time:

• 4 hours 30

Ingress protection: • IP66 certified by an approved laboratory (INERIS)

Weight: 6.85kg Dimensions: H 470 x W 180 x D 190 mm EC marking:

Marking as per Electromagnetic Compatibility Directive 89/336/EEC: conforms to standard EN 50270 Explosive Atmospheres (ATEX) 94/9/EC: Marking as per Explosive Atmospheres Directive (ATEX) 94/9/EC: On the BM 25:

ISC/OLDHAM Arras CE 0080 BM 25

II 1G/ I M1 EEx ia IIC T4 EEx ia I With MOS/IR module II 2G/ I M2 EEx ia d IIC T4 EEx ia d I INERIS 05ATEX0044 Do not open in explosive atmospheres Serial number Year of build

41

22 .. MM eeaassuurr iinngg ccee llllss ((nnoonn--rreessttrr iicc tt iivvee ll iiss tt))

Table 1

Methane CH4

Propane C3H8

Methane CH4

Oxygen O2

2 years

Oxygen O2

1 year

Carbon dioxide

CO2

Carbon monoxide

CO

Hydrogen sulphide

H2S

Cell reference 6 313 888 6 313 888 6 313 889 6 313 780 6 313 817 6 313 818 6 313 787 6 313 788

Standard range (1) 0 - 100% LIE CH4

0 – 100 % C3H8 LEL

0 - 100 % vol

2 - 30 % volume 2 – 30 % volume 0 - 5 % v/v 1000 100

Measuring principle Thermocatalytic Thermocatalytic Catharometric Electrochemical Electrochemical Infrared absorption

Electrochemical Electrochemical

Display resolution (1) 1 % LEL 1 % LEL 1 % v/v 0.1 % v/v 0.1 % v/v 0.1 % v/v 1 1 Accuracy (2) 2 2 2 0.3 % v/v 0.3 % v/v 0.2 % v/v 15 3 Repeatability (3) ± 1 % LEL ± 1 % LEL ± 1 % vol 0.1 % v/v 0.1 % v/v 0.1 % v/v 1 1 Zero / sensitivity drift 0.5 / 5 0.5 / 5 0..2 / 2 0.2 / 2 0.2 / 2 0.2 / 2 0.5 / 1.5 0.5 / 2.5 Response time (5) < 20 < 25 < 20 < 10 < 10 < 30 < 30 < 25 Temperature (6) -20 to +50 -20 to +50 -20 to +50 -20 to +40 -20 to +40 -10 to +40 -20 to +40 -20 to +40 Relative humidity and pressure range (7)

0 – 95 % RH 1 bar ± 20 %

0 – 95 % RH 1 bar ± 20 %

0 – 100 % RH 1 bar ± 20 %

10 – 95 % RH 1 bar ± 20 %

10 – 95 % RH 1 bar ± 20 %

10 – 95 % RH

1 bar ± 20 %

10 – 95 % RH 1 bar ± 20 %

10 – 95 % RH 1 bar ± 20 %

Lifetime (8) 48 48 60 28 16 60 36 36

Storage conditions and maximum storage time (9)

-40 to +40 °C 10 – 60 % RH 1 bar ± 10 %

6 months

-40 to +40 °C 10 – 60 % RH 1 bar ± 10 %

6 months

-40 to +40 °C 10 – 60 % RH 1 bar ± 10 %

6 months

4 – 20 °C 10 – 60 % RH 1 bar ± 10 %

3 months

4 – 20 °C 10 – 60 % RH 1 bar ± 10 %

3 months

0 – 40 °C 10 – 60 %

RH 1 bar ± 20 %

6 months

4 – 20 °C 10 – 60 % RH 1 bar ± 10 %

2 months

4 – 20 °C 10 – 60 % RH 1 bar ± 10 %

2 months

Warm-up time (10) 30 s 30 s Cells ready to operate immediately on starting up the instrument

120 s Cells ready to operate immediately on starting up the instrument

Notes - The measurement is under-estimated for oxygen levels < 10% - Exposure to high concentrations of silicon or sulphur vapours may damage the sensor - The sensor is sensitive to most explosive gases

- The presence of high concentrations of CO2 may result in a slight over-estimation of the O2 content

- Exposure to high concentrations of organic solvents may damage the cells. - Exposure to gas concentrations greater than the sensor range may damage the cell. Recalibrate the cells if they have exceeded their range.

42

Table 2

Chlorine C12

Hydrochloric acid HCl

Hydrocyanic acid HCN

Ammonia NH3

Ammonia NH3

Nitric oxide NO

Nitrogen dioxide

NO2

Sulphur dioxide

SO2

Reference 6 313 809 6 313 804 6 313 805 6 313 799 6 313 800 6 313 802 6 313 801 6 313 819

Standard range (1) 10 30 10 100 1000 300 30 30 Measuring principle Electrochemical Electrochemical Electrochemical Electrochemical Electrochemical Electrochemical Electrochemical Electrochemical Display resolution (1) 0.1 0.1 0.1 1 1 1 1 1 Accuracy (2) 0.25 1 0.25 5 30 10 1 1 Repeatability (3) 2 2 2 2 2 1 1 1 Zero / sensitivity drift 0.5 / 5 0.5 / 5 0.5 / 5 1 / 2 1 / 2 0.5 / 3 0.5 / 5 0.5 / 2 Response time (5) < 60 < 80 < 60 < 60 < 60 < 30 < 30 < 60 Temperature (6) -20 to +40 -20 to +40 -20 to +40 -20 to +40 -20 to +40 -15 to +40 -20 to +40 -20 to +50 Relative humidity and pressure range (7)

10 – 90 % RH 1 bar ± 20 %

15 – 95 % RH 1 bar ± 20 %

15 – 95 % RH 1 bar ± 20 %

15 – 90 % RH 1 bar ± 10 %

15 – 90 % RH 1 bar ± 10 %

20 – 90 % RH 1 bar ± 20 %

15 – 90 % RH 1 bar ± 20 %

15 – 90 % RH 1 bar ± 10 %

Lifetime (8) 30 24 24 24 24 30 40 30 Storage conditions (9) 4 – 20 °C

10 – 60 % RH 1 bar ± 10 %

2 months

4 – 20 °C 10 – 60 % RH 1 bar ± 10 %

2 months

4 – 20 °C 10 – 60 % RH 1 bar ± 10 %

2 months

4 – 20 °C 10 – 60 % RH 1 bar ± 10 %

2 months

4 – 20 °C 10 – 60 % RH 1 bar ± 10 %

2 months

4 – 20 °C 10 – 60 % RH 1 bar ± 10 %

2 months

4 – 20 °C 10 – 60 % RH 1 bar ± 10 %

2 months

4 – 20 °C 10 – 60 % RH 1 bar ± 10 %

2 months Warm-up time (10) Cells ready to operate immediately after starting up the instrument Notes - Exposure to high concentrations of organic solvents may damage the cells.

- Exposure to gas concentrations greater than the sensor range may damage the cell. Recalibrate the cells if they have exceeded their range. 1 - In ppm unless indicated otherwise . 2 - At 50% of the scale (unit identical to the range) 3 - As a % of the signal read unless indicated otherwise 4 - Maximum values observed under normal conditions of use per month as a % of the scale for the zero and a % of the measurement for sensitivity 5 - In seconds at 90% of the final value 6 - In °C 7 - Without condensation 8 - Observed average in months. 12-month guarantee. 9- All cells must be stored under air- free conditions 10- Time required after starting up the instrument to obtain optimal cell performance

43

44