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GAS DATA

Monitoring the Environment

GFM400 Series Gas Analyser User Manual

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Summary of Contents for GFM400 Series

Page 1: ...GAS DATA Monitoring the Environment GFM400 Series Gas Analyser User Manual...

Page 2: ...GFM400 Series User Manual User guide to the operation of the GFM400 series of portable environmental monitors Issue Description July 2006 GFM400 Series GFM400 Series User Manual...

Page 3: ...information Ensure instrument is fully charged before use i Part Number B Product Description B Water Filters Sample Tubes GFMFilt B Replacement water filter Supplied in pack of 10 J GFMQRC Quick rel...

Page 4: ...in flammable atmospheres 27 Connections 7 Testing and certification 28 Gas measurement 7 Schiltknect Vane Anemometer 29 Connecting the gas pipe 7 Operating Instructions 29 Gas pressure measurement 8 I...

Page 5: ...riety 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 GFM400 Series has rechargeable Nickel Metal Hydrid...

Page 6: ...a red CO2 analysis 0 100 Electrochemical O2 analysis 0 25 Atmospheric pressure 800 to 1200 mbar User spec d gas channels Static Gauge Pressure 400 mbar Vane anemometer input 0 07 40 0 m s Temperature...

Page 7: ...be observed Safe practice BEFORE entering a known hazardous zone switch on the instrument and make sure the display is visible BEFORE entering a known hazardous zone check that the keys respond BEFOR...

Page 8: ...ot operate the unit if it is damaged in any way i e loose front panel missing screws etc Do not connect or remove plugs from the battery charger socket in the hazardous area Only charge the batteries...

Page 9: ...e or takes a sample in other modes 5 4 Up This key scrolls up the gas channel and summary screens 5 Previous This key moves the instrument to the previous channel group 6 Next This key cycles the inst...

Page 10: ...G F M 4 0 0 S E R I E S U S E R M A N U A L Navigating the instrument screens GFM410 GFM400 Series 6 GFM400 Series User Manual...

Page 11: ...ecting the gas pipe Connect the flexible plastic gas pipe to the Gas In port on the top of the GFM400 or GFM410 instrument The port will automatically lock the pipe in place preventing it from being p...

Page 12: ...switch to Channel Group 2 Pressure The display screen will change to show the last retained gas pressure reading indicated by the highlight around the pressure figure Now press the start sample key Th...

Page 13: ...er should be in line with the pipe NOT at right angles to it When the anemometer is as far into the gland as possible without opening the tap re check the orientation and open the gas tap Finally push...

Page 14: ...he opening screen Auto Turn Off To help conserve battery life the GFM400 Series features an auto power off facility This ensures that the instrument will switch itself off after 10 minutes if no keys...

Page 15: ...y changes its function according to which screen is displayed It either switches the instrument to Calibrate mode turns on the sample pump in the gas measurement mode or takes a pressure sample in oth...

Page 16: ...G F M 4 0 0 S E R I E S U S E R M A N U A L Navigating the instrument screens GFM430 GFM400 Series 12 GFM400 Series User Manual...

Page 17: ...ll display the last retained readings indicated by the highlight area around the gas figures To view additional gas analysis channels press the Down key Additional channels will appear line by line if...

Page 18: ...Next key to switch to Channel Group 2 Pressure Temperature and Velocity The display screen will change to show the last retained gas pressure temperature and velocity readings indicated by highlights...

Page 19: ...ure that the anemometer is correctly orientated The arrow on the tip of the anemometer should be in line with the pipe NOT at right angles to it When the anemometer is as far into the gland as possibl...

Page 20: ...g press the Start Sample button and the flow and differential pressure become live When the reading has stabilised press the Stop Sample key again to retain the reading This will return the highlight...

Page 21: ...sappeared it is time to recharge the batteries or replace them with another battery pack To recharge the batteries simply plug in the battery charger lead to the socket on the top end of the instrumen...

Page 22: ...the field you can of course recharge them later when you return to base Changing the gas filter There is a gas filter built into the input of the instrument Check this filter weekly and change it whe...

Page 23: ...ruments involves the use of pressurised cylinders of test gases These may produce hazards including the following High pressure gas leakage Release of flammable gas mixtures Release of toxic gas mixtu...

Page 24: ...0 for CO2 it is 40 0 and for O2 it is 20 9 IMPORTANT All test gas cylinders must be used in conjunction with a gas flow regulator set to 500 ml min To reset the instrument to the factory delta figure...

Page 25: ...pecified concentration to the instrument DO NOT connect the gas cylinder direct to the instrument because this will cause irreparable damage Instead connect through a T piece to bypass most of the gas...

Page 26: ...mbar 1 mbar resolution Static Pressure 200mbar 200mbar 1 mbar resolution Standard Accessories Battery Charger Carry Case Sample Pipe Manual Calibration Certificate Optional Gas Channels Maximum of 4...

Page 27: ...luded to enable you to make quick and easy conversions from velocity measurements provided by the vane anemometer to flow rates Velocity Flow conversion chart 160 00 140 00 120 00 100 00 80 00 60 00 4...

Page 28: ...0 0 5 1 1 5 2 2 5 3 3 5 4 4 5 5 Velocity ms 1 Velocity Flow conversion chart 6000 00 5000 00 4000 00 3000 00 2000 00 1000 00 0 00 0 5 10 15 20 25 30 35 40 Velocity ms 1 GFM400 Series 24 GFM400 Series...

Page 29: ...0 S E R I E S U S E R M A N U A L The formula for calculating the conversion is f 0 00283d v where f flow in m3h 1 d pipe inside diameter in mm v velocity in ms 1 GFM400 Series 25 GFM400 Series User...

Page 30: ...e 2 An area in which an explosive gas air mixture is not likely to occur in normal operation and if it does occur will exist only for a short time Make certain that the area in which you intend to wor...

Page 31: ...e generation of a spark or temperature capable of igniting the gas even if the instrument develops TWO faults 2 ib The safety circuits used will prevent the generation of a spark or temperature cable...

Page 32: ...ment This assessment examines the design and construction criteria set out above and controls the manufacture This process is defined in Annex II of the European ATEX Directive 94 9 EC This allows the...

Page 33: ...please check for any mechanical damage Any damage detected should be immediately reported to the relevant post office or to the carrier at your company s location Avoid moisture extreme temperatures...

Page 34: ...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 remain in a se...

Page 35: ...the vanes or the spindle The adjustment of the bearing screws must never be changed This can result in erroneous measurements Never allow hard objects to contact rotating impellers Cleaning agents wh...

Page 36: ...applied to the parts with a fluff free cloth Only carry out surface cleaning The parts are never to be immersed in the solution Snap Head The snap head fixing system renders it very simple to fit a ne...

Page 37: ...will be paid by the end user Conditions and exclusions To maintain this warranty the purchaser must perform maintenance and calibration as prescribed in this user guide This includes prompt replacemen...

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