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FIRST RESPONDER CG - USER HANDBOOK
Volume Gas, 0 – 100 %
(CGI, CSM and PURGE modes only)
This range displays the total volume of flammable gas with
respect to air.
When the Volume Gas range is selected, GAS is displayed
in the top right corner of the LCD. The digital display resolves
the signal to 0.1% GAS from 0 to 5%, and 1% GAS from
5% to 100%. The analogue bar graph follows in 4% steps.
Figure 2-4 illustrates the Volume Gas display. The detection
principle for this Volume Gas range is a catalytic reaction
combined with thermal conductivity.
Fig. 2-4 Volume Gas Range
Carbon Monoxide, 0 – 1000 ppm
(CSM mode only)
This range displays the parts per million (ppm) Carbon
Monoxide content up to 999 ppm. When the Carbon
Monoxide range is selected, CO is displayed in the top right
corner of the LCD.
The digital display resolves to 1 ppm CO. The analogue
bar graph follows in 40 ppm steps. Above 1000 ppm, EEEE
is displayed. Figure 2-5 illustrates the Carbon Monoxide
display.
The Carbon Monoxide sensor is subject to the effect of
pressure transients and should be operated at normal
atmospheric pressure conditions. The sensor has a normal
operating life of two years.
2-4
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