GMI GT series - Page 76

9-4
SNIFFER MODEUSER HANDBOOK
9.5.3 Zero
To zero the ppm range
• Press and hold the RH button .
Note: The pump must be switched ON to zero the ppm range.
9.5.4 Flow Fault
If ow fault is detected, the pump stops automatically. The instrument
should be checked for water ingress or blockage.
To clear the ow fault:
(Once the blockage has been cleared):
• Press the RH button .
9.5.5 Ticker (Geiger) On / Off
To enable / disable the Geiger (Ticker):
• Press and hold the UP and DOWN buttons
simultaneously, as follows:
1. Press and hold - to enable visual only.
2. Press and hold again - to disable both audible and visual.
3. Press and hold again - to enable both audible and visual.
9.5.6 Ticker (Geiger) Adjust
To adjust the Ticker (Geiger) threshold:
(after the Ticker (Geiger) feature has been enabled)
• Press the UP or DOWN buttons.
The threshold setting is displayed briey beneath the PPM CH
4
.