Ametek Thermox 2000 ATEX Series User Manual page 120

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ENTER for next Gas.
CANCEL to quit.
When you have adjusted the pressure and flow for the zero gas to
the desired levels, press the Enter key.
The following message will then appear on your display, indicating that
the RCU has introduced the combustibles span gas to the sensor:
Comb gas is flowing
Once you have set the pressure and flow for the span gas, the system
prompts you to press the Cancel key to end the cycle:
CANCEL to quit
Press the Cancel key to end the cycle.
Then, if you specified a recovery time, the system will display the recov-
ery time remaining:
Recovery xx:xx
The system then returns to monitoring process readings.