Heath Consultants GT Series - Manual (Page 53)

4-11
LEAK TEST MODE
When the menu appears on the screen, release
the buttons, otherwise the instrument will proceed
into the switch OFF process and will switch OFF
after a further three (3) seconds.
4.6 LEAK TEST TICKER (GEIGER) FUNCTION
The Ticker (Geiger) function is available on flammable
ppm range. The Ticker (Geiger) range at start-up is
0-1000 PPM.
For any subsequent PPM concentration, the Ticker (Geiger)
audible / visual can be ‘backed off’ using the UP
or
DOWN buttons.
e.g. 600 PPM Ticker (Geiger) can be ‘backed off’ to enable
tracing to higher concentrations, in which case the Ticker
(Geiger) range becomes 600 to 1600 PPM etc, etc.
Note: The display range remains always as 0 to 2000
PPM.
The Ticker (Geiger) visual is such that the lights illuminate
in pairs according to Fig. 4.9 over any 1000 PPM range as
explained above.