GEM2000 Range Gas Analysers
OMGEMN1.41
Copyright 2009 Geotechnical Instruments (UK) Limited
Page 27
6.10.6
Adjust Contrast
The GEM2000 range of instruments automatically adjusts the screen contrast to maintain
a normal viewing contrast according to the current read-out temperature.
1)
From the ‘Main’ menu select ‘Key 8 – Scroll Down’ to highlight ‘Adjust Contrast’ and
press the ‘Enter’ key.
2)
Manual adjustment of the contrast is available via this option and can be carried out
with use of ‘Key 4 - Arrow Left’ (
<
) and ‘Key 6 - Arrow Right’ (>).
3)
Select the ‘Enter’ key to store the setting.
Note:
The manually set contrast setting is retained when the read-out is switched
off and may require resetting when next switched on.
6.10.7
Field Calibration
This feature enables the user to use a known standard of calibration gas to check the
calibration of the instrument and to recalibrate.
Note:
For more information please refer to ‘Section 8 – Calibration’ of this operating
manual.
6.10.8
Mode of Operation
This feature enables the operator to change the analyser between a gas extraction
monitor (a GEM2000 range analyser) and a landfill gas analyser (a GA2000 range
analyser).
1)
From the ‘Main’ menu select ‘Key 8 – Scroll Down’ to highlight ‘Mode of Operation’,
press the ‘Enter’ key and the following screen is displayed:
