GEM2000 Range Gas Analysers
OMGEMN1.41
Copyright 2009 Geotechnical Instruments (UK) Limited
Page 31
Warning
Inhaling hydrogen sulphide gas can cause death. It is the responsibility
of the user to ensure that he/she is adequately trained in the safety
aspects of using H
2
S. In particular, where hazardous gases are being
used the gas exhausted from the analyser must be piped to an area
where it is safe to discharge the gas. Hazardous gas can also be
expelled from the instrument when purging with clean air.
Good Practice
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Travel to site with the read-out in the vehicle's interior - not in the boot, where it
may be subjected to extremes of temperature and possible shock damage. Do not
place the read-out against anything hot (e.g. gas extraction pipe, car body or in an
unattended car during the summer) as this will cause a temperature wave through
the read-out and may cause erroneous readings.
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When moving around a site, protect the read-out from strong direct sunlight and
heavy rain. Strong direct sunlight will quite quickly raise the temperature of the
read-out beyond its operating range and the LCD display will appear almost black
and the contrast setting cannot alter the contrast.
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Always use the water trap! If the water trap becomes flooded, change the filter and
ensure all tubes are clear before re-use.
7.2 Update Site Data
Prior to taking the readings at a particular site the site data should be updated (if using
GAM). This is accessed via the ‘Main’ menu. This function removes the need for the site
conditions to be recorded manually.
A series of up to five questions can be pre-programmed with the use of Gas Analyser
Manager and answered at this time. The answers to these questions are stored and
appended to each reading stored thereafter, until the site data is updated for another site.
