Ametek CEM/Humox, User Manual

Page: 88 / 136

5-12 | Thermox CEM/Humox Analyzer
NOTE

Cal Gas Value
This menu option allows you to enter span and zero calibration gas values to match
the calibration gas cylinders you use to calibrate or verify your system. These values
will be used for all automatic, remote, or manual calibrations and verifications.
•
O
2
Span gas - high calibration gas
•
Zero gas - low calibration gas
The O
2
span gas value you enter must be higher than the O
2
zero gas
value.
See the “Mechanical Installation” section in the Installation chapter
for recommended calibration gases.
1. Select Cal Gas Value from the Calibrate key menu.
You are prompted to enter the span gas value:
Span Gas = xx.x% O2 Dry
New Value?
2. Enter the span gas value, then press the Enter key. You can also include a decimal
point (for example, 20.9% O
2
). If you wish to keep the current span gas value
unchanged, press the Enter key without entering a value.
You are then prompted to enter the zero gas value:
Zero Gas = xx.xx% O2 Dry
New Value?
3. Enter the zero gas value, then press the Enter key. You can enter up to two
decimal points (for example, 2.00% O
2
). If you wish to keep the current span
gas value unchanged, press the Enter key without entering a value.