3-23
OPERATION
3.14 LEL / Vol Gas Range Selection
(CGI mode only)
When the warm-up cycle is complete, the instrument
automatically selects the LEL range as default.
To select Vol Gas range:
• Single press ‘RANGE’ (Top Button) .
3.15 Switch Pump OFF / ON
(CGI mode only)
When the warm-up cycle is complete, the instrument pump
is automatically set to ON.
To switch the pump OFF / ON:
• Press and hold ‘PUMP’ (Bottom Button) for one
second.
3.16 Zero All Ranges
(CGI mode only)
To zero all ranges, e.g. If the instrument displays a gas
reading when operating in fresh air:
To zero all ranges in fresh air:
•
Press and hold the Bottom Button for
approximately ve (5) seconds The following screen
is displayed:
Fig. 3-35 Zero All Ranges