Gas Measurement Instruments Gascoseeker 2-500 User Handbook Manual
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Gas Measurement Instruments Gascoseeker 2-500 User Handbook Manual

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  • Page 1 Gascoseeker 2-500 User Handbook...
  • Page 2 GASCOSEEKER 2-500 USER HANDBOOK Issue 2 22/01/15 Part Number: 42476 INSTRUMENT SERIAL NUMBER DATE OF ISSUE ISSUED TO RECORD OF INSPECTIONS INSPECTED CHECKED DATE WORKSHOP GMI welcomes comments on all our publications. Your comments can be of great value in helping us to improve our customer publications.

  • Page 3: Copyright

    In view of the policy of continuous product improvement there may be operational differences between the latest product and this manual. This Handbook is an important part of the Gascoseeker 2-500 product. Please note the following points: •...

  • Page 4: Safety

    GASCOSEEKER 2-500 USER HANDBOOK SAFETY • The instrument must be regularly serviced and calibrated by fully trained personnel in a safe area. • Batteries: Alkaline batteries must be exchanged in a safe area and fitted correctly before use. Never use damaged batteries or expose to extreme heat.

  • Page 5: Revision Record

    REVISION RECORD Date Pages Description Of Change Issue 1 New User Handbook 26/08/03 Issue 2 Revised to include effect 22/01/15 of CN 6445...
  • Page 6 GASCOSEEKER 2-500 USER HANDBOOK...

  • Page 7: Table Of Contents

    GASCOSEEKER 2-500 USER HANDBOOK CONTENTS COPYRIGHT ..............i LIABILITY ..............i MODIFICATION NOTICES ........... i SOFTWARE ..............i DISPOSAL ADVICE ............i SAFETY ................ ii AREAS OF USE ............ii STORAGE, HANDLING AND TRANSIT ...... ii REVISION RECORD ........iii GENERAL .............
  • Page 8 GASCOSEEKER 2-500 USER HANDBOOK RANGES OF OPERATION ......5 % LEL Range ............. 5 % Gas Range ............. 5 LEL Range Display ............ 6 SENSOR LIFE ..........8 SPECIFICATION ........... 9 OPERATING PROCEDURE ....... 10 CALIBRATION ..........11 BEFORE USE ..........12 MEASURE MODE ........
  • Page 9 GASCOSEEKER 2-500 USER HANDBOOK ZERO MODE ..........19 OPERATOR MESSAGES ......22 SAMPLE ..............22 OFF ................22 SAMPLE FAULT ............22 ZERO FAULT ............22 BAT ‘Flashing’ ............22 BAT FAULT .............. 22 ZERO ............... 22 PROBE ............23 SAMPLE LINE ..........
  • Page 10 GASCOSEEKER 2-500 USER HANDBOOK BATTERY LIFE ........... 32 Battery Safety Code ........... 34 Battery Replacement ........36 ASPIRATOR BULB ........40 Carrying Straps ........... 43 WAISTBAND HARNESS ......46 INSTRUMENT COTTON FILTER ....47 FAULT FINDING ......... 49 Fault Finding ............... 52 INSTRUMENT WILL NOT SWITCH ON ....
  • Page 11 GASCOSEEKER 2-500 USER HANDBOOK SAMPLE FAULT KEEPS OPERATING ....59 ZERO FAULT FLAG OPERATES ......61 CHECK ZERO FLAG OPERATES ......63 BACKGROUND ILLUMINATION DOES NOT OPERATE ..............64 INSTRUMENT SWITCHES ON AND IMMEDIATELY SWITCHES OFF ............65 INSTRUMENT STARTS CORRECTLY BUT SWITCHES OFF WHEN PUMP OPERATED ..
  • Page 12 GASCOSEEKER 2-500 USER HANDBOOK...

  • Page 13: General

    GASCOSEEKER 2-500 USER HANDBOOK GENERAL The G.M.I. Gascoseeker 2-500 has been designed as a replacement for the successful Gascoseeker Mk 2 instrument for the measurement of % LEL and % Volume Gas. This handbook describes the operation and user maintenance of the instrument.

  • Page 14: Lel

    GASCOSEEKER 2-500 USER HANDBOOK % LEL The % L.E.L. (Lower Explosive Limit) range indicates the explosibility of the flammable gases in the sample. In the case of METHANE (NATURAL GAS) 100% L.E.L. represents 5% by volume Methane in air. On this range...

  • Page 15: Operation

    GASCOSEEKER 2-500 USER HANDBOOK Operation A sample of the atmosphere to be measured is drawn through the instrument by means of a pump via a filter into the analysing chamber. The analysing chamber contains the detection elements which monitor the gas.

  • Page 16: Construction

    GASCOSEEKER 2-500 USER HANDBOOK CONSTRUCTION The instrument is housed in a tough impact resistant moulded case. The case material is carbon filled polycarbonate to reduce static risk and remove interference from radio or other equipment. The top surface of the instrument is covered with stainless steel escutcheons which are marked with the necessary basic operating instructions.

  • Page 17: Ranges Of Operation

    GASCOSEEKER 2-500 USER HANDBOOK RANGES OF OPERATION % LEL Range On the % LEL range, the instrument shows the flammable gas concentration up to 100% LEL which for METHANE (NATURAL GAS) represents 5% Volume Methane in Air. The instrument calibration is shown on the instrument label i.e.

  • Page 18: Lel Range Display

    GASCOSEEKER 2-500 USER HANDBOOK From 0-10% GAS the digital display shows a decimal point and resolves the digital display to 0.5% GAS. From 10% - 100% GAS the digital display shows a decimal point and resolves the signal to 1% GAS.
  • Page 19 GASCOSEEKER 2-500 USER HANDBOOK Digital Display Range Indicator SAMPLE Analogue Bar Graph Status Flags Digital Display with Instrument Measuring LEL Range The LIQUID CRYSTAL DISPLAY (LCD) is protected by a toughened glass cover and is weatherproof. Backlighting is provided automatically to enable the display to be seen under low ambient light conditions.

  • Page 20: Sensor Life

    GASCOSEEKER 2-500 USER HANDBOOK SENSOR LIFE The sensors in the Gascoseeker 2-500 are manufactured to give improved stability and longer life and will operate many thousands of times with no effect on sensitivity or zero. Exposure to high concentrations of gas will not damage the elements.

  • Page 21: Specification

    GASCOSEEKER 2-500 USER HANDBOOK SPECIFICATION Accuracy at N.T.P. for Methane (Natural Gas) % LEL 2% Nominal +/- 1.5% L.E.L. % Volume Gas 1% Nominal +/-1.0% GAS (When calibrated at defined point on scale, due to lineariser function) Temp. Range: -20 Deg.C to +50 Deg.C...

  • Page 22: Operating Procedure

    GASCOSEEKER 2-500 USER HANDBOOK OPERATING PROCEDURE The instrument should always be used as per the operating procedures for the operation being carried out. IF IN DOUBT, ASK YOUR SUPERVISOR...

  • Page 23: Calibration

    GASCOSEEKER 2-500 USER HANDBOOK CALIBRATION The instrument has been calibrated for a particular gas mixture in air. The calibration gas is identified by means of the calibration label on side of instrument. Normally this would have “METHANE” written on it.

  • Page 24: Before Use

    GASCOSEEKER 2-500 USER HANDBOOK BEFORE USE The instrument should be checked before setting out for site to ensure that it is operational. The detailed check procedures are given later in the manual, but a short summary is given below. •...

  • Page 25: Measure Mode

    GASCOSEEKER 2-500 USER HANDBOOK MEASURE MODE 1. Switch ON Push MEASURE button ONCE to switch ON. Push MEASURE button once to switch ON PUMP ON PUMP OFF MEASURE GASCOSEEKER 2-500 ZERO Instrument performs self check and energises all segments in display.
  • Page 26 GASCOSEEKER 2-500 USER HANDBOOK Display indicates instrument version identifier and software version number. Indicates software Instrument version program version Bar graph indicates battery capacity and background illumination activated. Background illumination ON...

  • Page 27: Ready For Use

    GASCOSEEKER 2-500 USER HANDBOOK 2. Ready For Use After a few seconds the instrument is ready for use, indicated by a flashing DIGITAL display. Display flashing 3. Sample Start A single press of the MEASURE button when the pump is stopped starts the pump and draws the sample.

  • Page 28: Sample Finish

    GASCOSEEKER 2-500 USER HANDBOOK The sample flag indicates that the pump is running. SAMPLE 4. Sample Finish A single press of the MEASURE button when the pump is running stops the pump and stops sampling. Push MEASURE button once to switch pump OFF...

  • Page 29: Switch Off

    GASCOSEEKER 2-500 USER HANDBOOK Display flashing 5. Switch Off (a) To switch off, depress MEASURE button twice in rapid succession. OFF appears in the display and instrument will shut down. To cancel, press MEASURE button ONCE. Push MEASURE button twice in rapid...
  • Page 30 GASCOSEEKER 2-500 USER HANDBOOK (b) Switch OFF is automatic after 30 minutes running. OFF appears in the display before automatic switch off. To cancel press MEASURE button ONCE. Display flashing...

  • Page 31: Zero Mode

    GASCOSEEKER 2-500 USER HANDBOOK ZERO MODE Make sure that the instrument is OFF and in FRESH AIR before zeroing. Press the ZERO push-button once. PUMP ON PUMP OFF MEASURE GASCOSEEKER 2-500 ZERO Push ZERO pushbutton once to enter ZERO mode The instrument will enter ZERO mode with similar test sequence to MEASURE mode.
  • Page 32 GASCOSEEKER 2-500 USER HANDBOOK Indicates software Instrument version program version ZERO but with ZERO flag activated Background illumination ON Instrument will enter the ZERO mode, indicated by ZERO in the status display and zero the instrument automatically. Only Zero errors of less than 4% can be zeroed by this...
  • Page 33 GASCOSEEKER 2-500 USER HANDBOOK Display flashing ZERO If this operation does not reset the zero and remove the ZERO FAULT or CHECK ZERO flags, the instrument should be returned to the service centre for checking. The instrument switches OFF automatically from the ZERO mode.

  • Page 34: Operator Messages

    GASCOSEEKER 2-500 USER HANDBOOK OPERATOR MESSAGES A number of messages can appear in the display window, indicating instrument status and operator action. READ AND UNDERSTAND HANDBOOK BEFORE USE SAMPLE Indicates that the pump is running and the instrument is sampling.

  • Page 35: Probe

    GASCOSEEKER 2-500 USER HANDBOOK PROBE The instrument is provided with a probe containing both a cotton and a hydrophobic filter. The probe ends can be changed to provide a short probe with an open end, or a long probe with a closed end.
  • Page 36 GASCOSEEKER 2-500 USER HANDBOOK Cotton Particulate Filter Hydrophobic Filter Probe Handle Assembly The sample line is permanently attached to the probe by means of a clip. The instrument should not be used without the probe and its filters in place.
  • Page 37 GASCOSEEKER 2-500 USER HANDBOOK Display flashing SAMPLE FAULT 1) Check to ascertain whether water has entered the probe. 2) Disconnect probe sample line from instrument. 3) Remove probe handle from probe end. 4) Remove cotton filter and discard.
  • Page 38 GASCOSEEKER 2-500 USER HANDBOOK 5) Remove hydrophobic filter, noting which way filter is fitted. (label on filter against label on probe end). 6) With the inlet side of filter (i.e. non label side of filter facing downwards) tap out any water and ensure the filter is not contaminated with dirt.
  • Page 39 GASCOSEEKER 2-500 USER HANDBOOK 8) Replace hydrophobic filter, ensuring that you replace it in the same way as it was before (i.e. label on filter against label on probe handle). 9) Fit new cotton filter into probe handle. 10) Reassemble probe handle and reconnect to...
  • Page 40 GASCOSEEKER 2-500 USER HANDBOOK Make sure that instrument will operate without activating SAMPLE FAULT flag when pump is running, to ensure that filter is clear. Sample flag operates with MEASURE button and no SAMPLE FAULT flag flashing SAMPLE If SAMPLE FAULT continues to activate, fit a new hydrophobic filter.

  • Page 41: Sample Line

    GASCOSEEKER 2-500 USER HANDBOOK SAMPLE LINE The probe is supplied complete with 1.5 metres of sample line attached. The sample line is connected to the right hand inlet nozzle of the instrument. The sample line fits easily over the male spigot of the inlet nozzle.

  • Page 42: Lel / Gas Measurements

    GASCOSEEKER 2-500 USER HANDBOOK LEL / GAS MEASUREMENTS Relationship of LEL and % Methane (Natural Gas) in Air % LEL (Lower Explosive Limit) i.e. the lowest concentration of METHANE (NATURAL GAS) in air that can cause an explosion. This figure varies...
  • Page 43 GASCOSEEKER 2-500 USER HANDBOOK LEL and % GAS in this handbook relates to a METHANE (NATURAL GAS) in Air mixture only, as the presence of other gases can have a significant effect on the explosivity of the mixture. The relationship between LEL and % METHANE...

  • Page 44: Battery Life

    GASCOSEEKER 2-500 USER HANDBOOK BATTERY LIFE 1) To obtain the 15 hours operating life specified you should use only LR20 alkaline cells. 2) Only 4 new cells should be fitted. When the cells are low or exhausted it is necessary to fit 4 new cells to reset the battery indicator bar graph to 100%.
  • Page 45 GASCOSEEKER 2-500 USER HANDBOOK 7) When BAT alarm flag is initiated there should be typically 1 - 2 hours life left for operation at normal temperature when alkaline cells are used. 8) BAT warning flag is a warning; the instrument may continue to be used until it switches off automatically.

  • Page 46: Battery Safety Code

    GASCOSEEKER 2-500 USER HANDBOOK Battery Safety Code Used correctly, primary cells/batteries are a safe and dependable source of portable power. Problems can occur if they are abused, resulting in leakage or other incidents which could cause equipment failure or personal injury.
  • Page 47 GASCOSEEKER 2-500 USER HANDBOOK ALWAYS Make sure the cells are undamaged, in good condition, in contact with the springs and the battery compartment cover is secure, when replacing batteries and before instrument use. Spare batteries can be kept in the carrying case for field replacement.

  • Page 48: Battery Replacement

    Duracell Industrial ID1300 Size: D (LR20) Duracell Procell MN1300 Size: D (LR20) Ever Ready Energiser Size: D (LR20) The Gascoseeker 2-500 contains four (4) batteries. All should be replaced at any one time with fresh batteries. To Replace the batteries, proceed as follows: 1) Operate in a safe area.
  • Page 49 GASCOSEEKER 2-500 USER HANDBOOK 4) Remove battery cover...
  • Page 50 GASCOSEEKER 2-500 USER HANDBOOK 5) Remove old batteries 6) Check battery compartment for damage to spring contacts or corrosion on springs.
  • Page 51 GASCOSEEKER 2-500 USER HANDBOOK 7) Replace all four (4) batteries with new units. Observe correct polarity with indicator marked in battery compartment base. 8) Replace base plate and fasten base screws. 9) Check that instrument switches ON, battery indicator and analogue display is satisfactory at...

  • Page 52: Aspirator Bulb

    GASCOSEEKER 2-500 USER HANDBOOK ASPIRATOR BULB An aspirator bulb is provided should the pump fail, to enable a sample to be taken. The aspirator bulb is fitted with an adaptor to enable it to connect to the instrument outlet. It will not connect to the inlet.
  • Page 53 GASCOSEEKER 2-500 USER HANDBOOK The bulb can be used to aspirate the instrument in the event of pump failure. Normally this would be indicated by either 1) Flashing digital display. 2) Absence of SAMPLE flag on display. 3) Flashing SAMPLE FAULT on display.
  • Page 54 GASCOSEEKER 2-500 USER HANDBOOK Connect aspirator bulb to outlet of instrument. The connection may not be leak free, however, this should not affect instrument performance. Aspirate sample through instrument as desired. Remember that display may be flashing since this is an indication of pump not running.

  • Page 55: Carrying Straps

    GASCOSEEKER 2-500 USER HANDBOOK Carrying Straps The carrying straps on the instrument are removable and adjustable. They include a shoulder pad and ‘D’ shaped loops for attachment of a waistband harness, (where desired). The waistband harness is not supplied with the instrument as standard, but is available as an accessory.
  • Page 56 GASCOSEEKER 2-500 USER HANDBOOK Pull strap upwards until strap clip locates firmly on stainless steel boss with sharp click. Strap can be adjusted to length by means of buckle.
  • Page 57 GASCOSEEKER 2-500 USER HANDBOOK Excess strap length can be clipped into open slot on top of strap clips.

  • Page 58: Waistband Harness

    GASCOSEEKER 2-500 USER HANDBOOK WAISTBAND HARNESS The waistband harness is supplied as an accessory. The waistband harness is attached to the instrument using the ‘D’ clips on the shoulder harness.

  • Page 59: Instrument Cotton Filter

    GASCOSEEKER 2-500 USER HANDBOOK INSTRUMENT COTTON FILTER A cotton filter is not normally fitted within the instrument since this normally is incorporated into the probe handle. However where the instrument is to be used without the probe handle provision is made within the instrument to incorporate a separate cotton filter.
  • Page 60 GASCOSEEKER 2-500 USER HANDBOOK When nozzle is removed filter can be placed in nozzle not in instrument. Nozzle and filter should then be placed in instrument, checking that ‘O’ ring seal on nozzle is not damaged before replacing. The cotton filter in instrument should be removed after use.

  • Page 61: Fault Finding

    GASCOSEEKER 2-500 USER HANDBOOK FAULT FINDING If the instrument does not appear to be functioning correctly it should be returned to the supervisor or workshop for checking and if necessary repair. There are a number of faults which can be checked and rectified by the user before sending to the instrument workshop.
  • Page 62 GASCOSEEKER 2-500 USER HANDBOOK Does the bar graph on battery SEE PAGE test not indicate 100% after fitting new batteries? Does the SEE PAGE SAMPLE FAULT keep operating? Does the SEE PAGE ZERO FAULT flag operate? Does the SEE PAGE...
  • Page 63 GASCOSEEKER 2-500 USER HANDBOOK Does instrument SEE PAGE immediately switch OFF? Does instrument start correctly SEE PAGE but switches OFF when pump is operated? Does instrument SEE PAGE not operate on Depot Checker? Is the gas SEE PAGE response slow?

  • Page 64: Fault Finding

    GASCOSEEKER 2-500 USER HANDBOOK Fault Finding IF IN DOUBT HAVE THE SUPERVISOR OR TECHNICAL STAFF CHECK THE INSTRUMENT FOR YOU INSTRUMENT WILL NOT SWITCH ON ARE BATTERIES FITTED? Instrument would normally be supplied without batteries fitted to ensure that only fresh batteries are used at the time of use.
  • Page 65 GASCOSEEKER 2-500 USER HANDBOOK once they are all in the battery compartment, to check that they are free and in contact. ACTION: CHECK ORIENTATION OF BATTERIES ARE CONTACTS ON BATTERIES AND TERMINALS DIRTY? If the batteries or the Instrument terminals are dirty they may not make a good enough contact to enable correct operation to take place.

  • Page 66: Instrument Will Not Switch Off

    GASCOSEEKER 2-500 USER HANDBOOK INSTRUMENT WILL NOT SWITCH OFF DOES OFF APPEAR ON DIGITAL DISPLAY? The OFF legend should appear in the LCD display to indicate the OFF sequence. This happens when instrument has been running for approximately 30 minutes or the MEASURE button has been pressed twice in rapid succession.

  • Page 67: Bat Flag Operates After Short Time

    GASCOSEEKER 2-500 USER HANDBOOK BAT FLAG OPERATES AFTER SHORT TIME ARE BATTERIES NEAR END OF LIFE? Normal life from a set of good quality alkaline batteries is in excess of 15 hours operation If pre-used or poor quality batteries are used the battery life may be substantially reduced.

  • Page 68: Batteries Do Not Give Long Use

    GASCOSEEKER 2-500 USER HANDBOOK BATTERIES DO NOT GIVE LONG USE HAVE NEW BATTERIES BEEN USED? Alkaline batteries will give up to 15 hours use in normal conditions, pre-used or poor quality batteries should not be used in the instrument ACTION: REPLACE BATTERIES WITH FOUR NEW LR2O ALKALINE CELLS.
  • Page 69 GASCOSEEKER 2-500 USER HANDBOOK ARE BATTERIES REPLACED WHEN BAT OR BAT FAULT INDICATOR IS ACTIVATED? Batteries would normally be replaced when the BAT FAULT flag is activated to achieve maximum battery life, however a work programme should not be commenced with the...

  • Page 70: Bar Graph On Battery Test Does Not Indicate 100% After Fitting New Batteries

    GASCOSEEKER 2-500 USER HANDBOOK BAR GRAPH ON BATTERY TEST DOES NOT INDICATE 100% AFTER FITTING NEW BATTERIES ARE 4 NEW ALKALINE BATTERIES FITTED? The bar graph indicates the battery condition at the last switch off to give a representative indication of potential...

  • Page 71: Sample Fault Keeps Operating

    GASCOSEEKER 2-500 USER HANDBOOK ARE ALL BATTERIES OF SAME TYPE? Only LR20 alkaline batteries should be used and they should all be from the same manufacturer. DO NOT MIX BATTERY TYPES OR MANUFACTURERS ACTION: ENSURE THAT LR20 ALKALINE BATTERIES FROM ONE...
  • Page 72 GASCOSEEKER 2-500 USER HANDBOOK HAS INSTRUMENT BEEN SWITCHED OFF AND ON AGAIN WITHOUT SAMPLE LINE ATTACHED? It may be necessary to switch the instrument OFF and ON again to enable the flow sensor to initiate the test conditions at start up which include the back pressure of the sample line and probe.

  • Page 73: Zero Fault Flag Operates

    GASCOSEEKER 2-500 USER HANDBOOK IS TEMPERATURE BELOW FREEZING? Low temperature reduces battery capacity and may increase pump current, thus causing SAMPLE FAULT conditions. In addition any moisture or water on the filters from previous tests which have not been completely...
  • Page 74 GASCOSEEKER 2-500 USER HANDBOOK HAS INSTRUMENT BEEN USED TO MEASURE PETROL, BUTANE OR SOME OTHER SUBSTANCE OTHER THAN METHANE? If instrument has been used for a heavy hydrocarbon or a volatile substance such as Petrol, this may be impregnated into the filters or some residue may be in sample line, which will register as a false zero in the zero check sequence.

  • Page 75: Check Zero Flag Operates

    GASCOSEEKER 2-500 USER HANDBOOK CHECK ZERO FLAG OPERATES HAS INSTRUMENT BEEN SWITCHED ON IN GASEOUS ATMOSPHERE? If the instrument has been switched on in an atmosphere which contained some gas, then a CHECK ZERO warning may be flagged to the operator as a warning This will depend upon the exact concentration.

  • Page 76: Background Illumination Does Not Operate

    GASCOSEEKER 2-500 USER HANDBOOK BACKGROUND ILLUMINATION DOES NOT OPERATE IS INFRA RED LINK CLEAN ON INSTRUMENT TOP PLATE? The infrared sensor also detects the ambient light condition and requires the apertures to be clear. ACTION: USE A DRY CLOTH TO REMOVE ANY...

  • Page 77: Instrument Switches On And Immediately Switches Off

    GASCOSEEKER 2-500 USER HANDBOOK INSTRUMENT SWITCHES ON AND IMMEDIATELY SWITCHES OFF IS BAT OR BAT FAULT FLAG ACTIVATED? If batteries have low capacity or are of poor qual~ they may provide sufficient power for a short time, thus enabling the instrument to switch on, but rapidly dropping sufficiently to initiate automatic shutdown via the BAT FAULT flag.
  • Page 78 GASCOSEEKER 2-500 USER HANDBOOK ARE SAMPLE LINE AND INSTRUMENT FILTERS CLEAR? If the sample line and filters are blocked and the batteries low, then the battery voltage may be pulled low by increased pump current This may initiate a BAT FAULT and automatic shutdown.

  • Page 79: Instrument Starts Correctly But Switches Off When Pump Operated

    GASCOSEEKER 2-500 USER HANDBOOK INSTRUMENT STARTS CORRECTLY BUT SWITCHES OFF WHEN PUMP OPERATED IS TEMPERATURE LOW? If the temperature Is low the battery capacity may be reduced and the pump current increased, thus causing battery voltage to be reduced below the automatic shutdown level when the pump is switched ON.

  • Page 80: Instrument Does Not Operate On Depot Checker

    GASCOSEEKER 2-500 USER HANDBOOK INSTRUMENT DOES NOT OPERATE ON DEPOT CHECKER HAS INSTRUMENT BEEN ISSUED TO DEPOT? Instrument and Depot Checker require to be set up by technical staff to ensure that they are operating correctly. ACTION: CHECK WITH SUPERVISOR THAT THE INSTRUMENT HAS BEEN ISSUED FOR USE ON DEPOT CHECKER.
  • Page 81 GASCOSEEKER 2-500 USER HANDBOOK IS THE INSTRUMENT TOP PLATE CLEAN AROUND THE INFRARED LINK? The instrument data is transmitted to the DEPOT CHECKER via the infrared link on the top plate. If this is dirty or obscured then the instrument may not be able to communicate with the checker.

  • Page 82: Gas Response Is Slow

    GASCOSEEKER 2-500 USER HANDBOOK GAS RESPONSE IS SLOW IS THE INSTRUMENT DETECTING METHANE? The instrument response is setup using METHANE. If you are detecting other substances such as BUTANE. PETROL VAPOUR etc, the response may appear slow. ACTION: CHECK YOU HAVE CORRECT INSTRUMENT FOR THE GAS YOU ARE USING.

  • Page 83: Instrument Does Not Change Range

    GASCOSEEKER 2-500 USER HANDBOOK IS THE TEMPERATURE LOW? If the temperature is low, the pump flow may be reduced because of battery voltage and any moisture in the filters may start to freeze, thus reducing flow rate. ACTION: REPLACE FILTERS WITH NEW ONES IF NECESSARY.
  • Page 84 GASCOSEEKER 2-500 USER HANDBOOK HAS THE INSTRUMENT BEEN CALIBRATED OR CHECKED? If the instrument has been calibrated or checked it may have been left in a non-range changing mode Switching instrument OFF and restarting it resets this function. ACTION: SWITCH OFF.

  • Page 85: Numbers On Digital Display

    GASCOSEEKER 2-500 USER HANDBOOK NO NUMBERS ON DIGITAL DISPLAY DOES INSTRUMENT COMPLETE ZERO SEQUENCE CORRECTLY? If the digital display is blank it indicates a zero shift that the instrument may not be able to correct, and may give inaccurate readings. Thus the display is blanked to prevent incorrect use Normally a ZERO FAULT flag would also be initiated.
  • Page 86 GASCOSEEKER 2-500 USER HANDBOOK...

  • Page 87: Index

    GASCOSEEKER 2-500 USER HANDBOOK Index Symbols BATTERIES DO NOT GIVE % GAS 30 LONG USE 56 % Gas Range 5 % LEL 2, 30 BATTERY LIFE 32 Battery Replacement 36 % LEL Range 5 % UEL 30 Battery Safety Code 34...
  • Page 88 GASCOSEEKER 2-500 USER HANDBOOK INSTRUMENT STARTS CORRECTLY BUT FAULT, BAT 22 SWITCHES OFF WHEN FAULT FINDING 49 Fault Finding 52 INSTRUMENT SWITCHES FAULT, SAMPLE 22 ON AND IMMEDIATELY FAULT, ZERO 22 SWITCHES OFF 65 FILTER, COTTON 47 INSTRUMENT WILL NOT...
  • Page 89 GASCOSEEKER 2-500 USER HANDBOOK PROBE 23 TRANSIT ii PROCEDURE, OPERAT- ING 10 WAISTBAND HARNESS ranges, measuring 1 RANGES OF OPERATION ZERO 22 Ready For Use 15 ZERO FAULT 22 Relationship of LEL and % ZERO FAULT FLAG Methane in Air 30...

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