Co 2 Calibration - PP Systems WMA-5 Operation Manual

CO Calibration
2
This menu allows the user to recalibrate the CO2 gas analyzer.
Before calibrating, confirm that:
·
The absorber column is properly seated in its manifold
·
The soda lime is fresh in the Zero Column.
·
The WMA-5 has been on for at least 30 minutes.
·
The Gas Out port is unobstructed.
Calibration
CO2 Conc (ppm) Button
Actual CO2
CO2 Scale Factor
Stop Button
Connecting Calibration Gas to the WMA-5
During calibration, the signal from the CO
concentration. The WMA-5 calibration procedure uses two reference points:
1. Zero CO (generated from air that has been scrubbed through soda lime).
2
2. Span Gas (a user-defined CO
certified cylinder of CO
It is therefore vital that both of these references are accurate. For greater accuracy, cylinder mixtures
should be accurate to +/- 1% and traceable to NIST standards. The zero gas will only be accurate if the
soda lime in the absorber column is fresh.
Assuming that a calibration gas mixture is used to calibrate the WMA-5, follow these instructions:
1. To avoid excess pressure in the sample cell and possible damage to the analyzer, you must connect
the sample line with a "T" piece between the calibration gas mixture and the gas inlet port on the
WMA-5 as follows:
WMA-5 Operation Manual V. 1.01
CO concentration (ppm) of the calibration reference gas.
2
Entering a value will begin the calibration process
The current CO2 Reading based on the Scale Factor
The current Scale Factor being used
Returns to the Calibration Menu.
detector is referenced against a gas of known CO
2
concentration, normally a very accurate (+/- 1% accuracy),
2
composition).
2
37
2
support@ppsystems.com