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GFM 436
Page 1: ...1 GFM 436...
Page 2: ...ctionality 13 4 3 1 Lower Explosive Limit 13 4 3 2 Managing hydrocarbons using the hexane channel 13 4 3 3 PID Compensation Factor Prediction 14 4 4 Third Party Approvals 15 4 4 1 ATEX 15 5 1 Optional...
Page 3: ...Sample Point Setup 37 12 2 Logging Setup 40 12 3 View reading display 40 12 4 Clock Display 43 12 5 Store Menu 44 12 6 User Calibration 45 12 7 Auto Turn Off 45 Low battery warning 46 Batteries 46 Ch...
Page 4: ...ent types of gas 65 Important notes 65 Response Time 66 Technical data MiniAir 6 Micro 66 Cleaning and maintenance 66 General handling tips 67 Cleaning instructions 67 Conditions and exclusions 70 Dis...
Page 5: ...5 Issue A Revision 2 Date 24 11 2022 ISSUE REV DATE REVISION DESCRIPTION A 1 19 12 2013 Initial Release A 2 28 11 2022 Brand Update...
Page 6: ...ard electrochemical gas sensor cells A variety of external sensors can be plugged in e g vane anemometer to measure gas velocity or a temperature probe for ambient and other temperatures The GFM436 se...
Page 7: ...mand Flow Regulator C10 Stainless Steel 18496 Tube GFM Sample Pipe 17227 GFM43x Sample Tube 17226 GFM43x 610 Flow Tube 16480 Cable GFM Temperature Probe Extension Cable 1m 19425 Vane Anemometer 16502...
Page 8: ...tering a known hazardous zone check that the sample pump can be operated The instrument must be inspected for damage prior to use and the instrument must not be used if the case is damaged o BEFORE en...
Page 9: ...t temperatures outside the range of 10 to 40 C Do not attempt to dismantle the instrument It contains no user replaceable parts Do not operate the unit if it is damaged in any way i e loose front pane...
Page 10: ...tweight small and robustly manufactured in a weather resistant case making it suitable for use even in challenging field applications It measures the methane carbon dioxide oxygen hydrogen sulphide he...
Page 11: ...6 features an auto power off facility It will switch itself off after 15 minutes if no keys are pressed or there is no USB communication activity During unattended data logging it can be set to shut i...
Page 12: ...4 LEL 30s Carbon Dioxide 0 to 100 0 1 0 3 5 3 0 40 3 0 40 20s Oxygen 0 to 25 0 1 0 5 20s Atmospheric Pressure 800 to 1200 mbar 5 mbar 1 mbar resolution 20s H2S 2000 ppm 10 0 5 of fs 30s CO 2000 ppm 1...
Page 13: ...0 It does not need additional gas calibration as the infra red beam is normalised using the existing methane calibration gas At 100 Methane concentration the Hexane reading will be typically showing 0...
Page 14: ...n its sample cell so that they can be quantified using an electronic charge amplifier However even small quantities of methane present in a borehole can absorb the UV light thus quenching the ionisati...
Page 15: ...do differ considerably see chart of typical responses below 4 4 1 This instrument is ATEX Certified under normal operation ATEX accreditation is void under the following circumstance If the instrumen...
Page 16: ...ries instruments are supplied in a fitted case containing the following items GFM4XX instrument seseriesnstrinstrument Battery charger Vane anemometer optional Spares kit Gas pipe Allen key Temperatur...
Page 17: ...s Velocity Readings Brass Temperature Probe Gas line temperature measuring device Instructions and information can be found on Chapter 9 0 Gas Temperature Readings In Car charger additional power adap...
Page 18: ...s to allow all the sensors to initialise During this period the letters WRM appear in the top right hand corner of the display as shown Please wait until WRM disappears before proceeding Also in the t...
Page 19: ...and the serial number If you ever need to contact Gas Data for assistance with your instrument please quote the serial number The Left Soft Key is labelled Light and will switch the Backlight on and...
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Page 22: ...ert the connector at the end of the sample pipe The port will lock the pipe in place and prevent it from being pulled out accidentally it can be removed by pushing the metal latch down and pulling out...
Page 23: ...the pump When the pump is running the screen will display live readings being taken from the gas When the readings have stabilised press the Right Soft Key again to freeze the reading When the pump is...
Page 24: ...on and off and will display Start Pump or the elapsed pump run time When the elapsed time is displayed pressing the soft key beneath will stop the pump When the pump is running the screen will display...
Page 25: ...the screen will display live readings being taken from the gas When the pump is stopped the values are frozen at the last measured values Pressing the Left Soft Key labelled Store or the OK Key will...
Page 26: ...26 When finished turn off the gas tap and remove the gas pipe Warning Take great care when connecting the pipe to the gas tap to avoid gas leakage...
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Page 28: ...________ Connect the open end of the gas flow tube to the gas tap or sample point on the borehole Open the gas tap and press the Right Soft Key to begin sampling The Flow and Pressure display shows th...
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Page 30: ...ampling Zero the readings by pressing the Middle Soft Key Zero Press the right soft key to stop sampling To measure the Static Pressure connect the Flow Sample pipe to the SP connection as shown in th...
Page 31: ...t Key will toggle the sampling process on and off When the sample is active the screen will display live readings being taken from the gas When the sample is stopped the values are frozen at the last...
Page 32: ...e pipework and insert the anemometer When the anemometer is as far into the gland as possible without opening the tap open the gas tap Finally push the anemometer into the gland far enough to ensure t...
Page 33: ...mometer can now be removed from the pipe Warning Warning Take great care when inserting the anemometer to avoid gas leakage Take great care when removing the anemometer In particular avoid standing wi...
Page 34: ...of the gas pipe Now press the Sample key to begin measuring the temperature in the pipe When the reading has stabilised press the Sample key to retain the reading This will return the highlight area a...
Page 35: ...e DIP level will be saved on exiting the display but switching the instrument off without exiting the display may cause entered data to be lost Pressing the Left Key will navigate to the Velocity Disp...
Page 36: ...g Setup is a menu for setting up unattended data logging parameters such as the sample period and the number of logs to be taken View is a display for viewing previously stored readings Set Clock allo...
Page 37: ...ction process until you have entered all the required characters To correct a mistake use the Right Softkey Del When this is completed press the Left Soft Key Accept to save ID details and return to t...
Page 38: ...38 Diagrammatic explanation of the relationship between the three levels of hierarchical storage available...
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Page 40: ...IDs allows you to change the sample point being viewed by pressing Left or Right If an ID is not currently selected then pressing the Left or Right Key will go to the previous or next reading in the c...
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Page 43: ...and edit the date and time The Left and Right Keys change which field is selected and the Up and Down Keys increment or decrement that field Pressing the OK Key or the Left Soft Key labelled OK will...
Page 44: ...enu and return to the Gas Display When you have chosen a sample point you wish to store a reading to you can press left Soft Key labelled Store to store the current reading or press Middle Soft Key la...
Page 45: ...see appendix B Incorrect user calibration will produce eroneous results To help prolong the time between charges the GFM will automatically turn off after 15 minutes of inactivity This does not occur...
Page 46: ...simply plug in the battery charger lead to the socket on the top end of the instrument and plug the charger into the mains The batteries will be fully charged in about three hours ___________________...
Page 47: ...and secure with the two screws IMPORTANT Always replace the battery pack in dry clean conditions preferably indoors ___________________________________________________________________________________...
Page 48: ...s Data Limited If you use a non recommended filter this will invalidate the warranty on the instrument To replace the filter first remove the four screws around the base of the Sample In port Lift the...
Page 49: ...ied concentration needs to be connected to the Gas In port at the top of the instrument with the valve open when calibrating a point It is recommended that a demand flow regulator is used If a demand...
Page 50: ...al a hidden Calibrate button Warning The use of pressurised cylinders of test gases may produce hazards including the following High pressure gas leakage Release of flammable gas mixtures Release of t...
Page 51: ...This means that you should choose a single point from those available to calibrate a channel as subsequent points will undo one before It is therefore important to consider the intended application a...
Page 52: ...inutes to allow the reading to fully stabilise then press the Middle Soft Key labelled Calibrate to calibrate the channel ______________________________________________________________________ NOTE On...
Page 53: ...53 Once calibration is complete press the Left Soft Key labelled OK to return to the Banner Display...
Page 54: ...he number of logs to be taken The Up and Down Keys scroll up and down and pressing the OK Key will enter or change the highlighted option The Left Soft Key labelled Light switches the backlight on and...
Page 55: ...d every 15 minutes Pressing OK will scroll through these options When you have selected the required value use the Up Down arrows to move to the next parameter By default the Pump Time is 2 minutes an...
Page 56: ...to start taking its next sample With battery save disabled the instrument will remain turned on at all times until the battery is empty Pressing OK when this parameter is highlighted will toggle this...
Page 57: ...be shown saying Logging Complete The Left Soft Key labelled Light switches the backlight on or off and the Right Soft Key labelled Cancel will stop the log and return to the Main Menu ________________...
Page 58: ...ing WARNING Switching Off May Interrupt Sampling will be shown when the instrument wakes itself as manually switching the instrument on or off during logging may interrupt sampling or cause a log to b...
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Page 60: ...ter to flow rates 0 00 20 00 40 00 60 00 80 00 100 00 120 00 140 00 160 00 0 0 5 1 1 5 2 2 5 3 3 5 4 4 5 5 Flow m 3 h 1 Velocity ms 1 Velocity Flow conversion chart d 50mm 0 00 100 00 200 00 300 00 40...
Page 61: ...283 0 where f flow in m3h 1 d pipe inside diameter in mm v velocity in ms 1 0 00 1000 00 2000 00 3000 00 4000 00 5000 00 6000 00 0 5 10 15 20 25 30 35 40 Flow m 3 h 1 Velocity ms 1 Velocity Flow conve...
Page 62: ...to work can be described by one of the zones above _________________________________________________________________________________________ The GFM400 Series is suitable for use in Zone 1 and 2 Diffe...
Page 63: ...g the gas even if the instrument develops TWO faults ib The safety circuits used will prevent the generation of a spark or temperature cable of igniting the gas even if the instrument develops ONE fau...
Page 64: ...__________________________________ The GFM400 Series is designed to meet the requirements of class T1 The GFM400 Series has been submitted for European Type Assessment This assessment examines the des...
Page 65: ...oisture extreme temperatures and vibrations Do not shake Cleaning of probes and indication unit only according to cleaning instruction Strong electromagnetic interference e g transformers radio transm...
Page 66: ...chiltknecht instruments are precision products which will give fault free service if correctly handled If you handle them as described in the operating instructions your instruments and probes will re...
Page 67: ...ver cool by plunging them in cold water or the like Instrument and probe must be switched off or disconnected prior to cleaning As the probes are highly sensitive measuring instruments they must be cl...
Page 68: ...back and forth in clean kerosene for ca 1 min to relubricate the impeller bearings If soapy water is used as a cleaning agent it is advisable to wash out the soap solution thoroughly with distilled w...
Page 69: ...productive time and in the event of damage to the snap head enables the operator to have the probe back in service in a matter of seconds by simply changing the snap head Checking factory inspections...
Page 70: ...be required according to the use of the equipment in the reasonable judgement of Gas Data Limited Normal wear and tear and parts damaged by abuse misuse negligence or accidents are specifically exclud...
Page 71: ...Unit 4 Fairfield Court Coventry CV3 4LJ United Kingdom Connect office gasdata co uk 44 0 24 7630 3311 gas data gasdata co uk...
