GMI Gasurveyor 500 Series, User Handbook Manual

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GASURVEYOR 500 USER HANDBOOK
3-8
Combustible Gas Indicator (CGI)
Operation
In this mode the instrument operates as a gas indicator
drawing a sample via a probe from points where gas is
suspected to be present. Alarms, by default, are disabled
in CGI mode, as the instrument is generally used for
measuring gas levels rather than monitoring for the
presence of gas.
Switching On in CGI Mode
Pressing and holding Switch Two ( ) turns the
instrument on in CGI mode. This initiates the instruments
warm up cycle and switches on the pump. Figure 3-5
gives an example of the warm up cycle for a Gasurveyor
500.
Figure 3-5 CGI Warm Up
Battery status is displayed as
either OK or LO at start-up.