Ametek Thermox 2000 ATEX Series User Manual page 111

You are then prompted to calibrate the zero gases:
O2 xx.x % Set xx.x %
Cmb yyyy Set 0
Press ENTER to Zero
5. Press the Enter key once the zero gas reading(s) on the left of the
display has stabilized. If you don't have the combustibles option, you
only need to wait until the O
the combustibles option, wait until all readings stabilize. The reading
on the far right of the first display line shows the setpoint value you
entered for the O
This O zero gas setpoint value should match the cal gas cylinder for
2
the O zero gas connected to your RCU.
2
If you have the combustibles option, you are also prompted to calibrate
the combustibles span gas:
O2 xx.x %
Cmb yyyy Set yyyy
Press ENTER to Span
6. Press the Enter key once the combustibles span gas reading(s) stabi-
lize on the far left of the display.
Then, if you specified a recovery time, the system will display the recov-
ery time remaining:
Recovery xx:xx
System Calibrating
The system then returns to monitoring process readings.
zero gas value stabilizes. If you have
2
zero gas using the Cal Gas Values menu option.
2
Calibration | 5-11