ENMET PROAIR 2200 - Manual (Page 29)

P RO A IR 2200 ENMET Corporation
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Figure 7: Connection of Calibration Gas Cylinder
Calibration Process for MOS Sensors
The following calibration procedure must be followed whenever a 60 series part number appear in the part number of the instrument,
examples 04652-6200-0000, 04652-7083-6000
Humidification is required when calibration is performed. In addition to the standard flow demand regulator, cylinder of calibration
gas you need
ENMET humidifier assembly part number 037000-000
Fill the humidifier with clean water to about ¾ full, connect the flow demand regulator to one side of the humidifier and
connect the other side of the humidifier to the
P RO A IR 2200 calibration/sampling port.
Warning: Be sure that the flow direction is correct, note the arrow on the humidifier, failure to do so will cause damage to the
P RO A IR 2200 instrument
With the cylinder regulator and humidifier assembled follow the above steps to complete the calibration process
5.4.4
A Low Cal/ZeroCal Adjust
A Low Cal function should be performed only when the P RO A IR 2200 sensor are exposed to clean uncontaminated air. Use a
cylinder of 20.9% oxygen to provide a clean air reference if necessary. Attach the cylinder to the calibration adapter, attach the
adapter to the instrument and allow gas to flow over the sensor for up to 4 minutes.
Enter the maintenance menu by repeatedly pressing OPTION switch, until the maintenance menu is displayed. See Figure 6,
P RO A IR 2200 Maintenance Menu flow chart.
The first menu available is the Low Cal/ZeroCal.
Press the SELECT switch 4 times to perform a Low Cal.
If the Low Cal/ZeroCal is successful, The display will change to Hi Cal/SpanGas.
If you wish to Hi Cal/SpanGas the sensor apply calibration gas.
Proceed to gas calibration Section 5.3.1B
If you wish to Exit the maintenance menu, Press and hold OPTION switch until the Maintenance Menu is displayed then
release. Then press OPTION switch until “Exit maint menu” appears and then press SELECT switch to return the instrument to
the Operational Display
An unsuccessful calibration will result in an error message being displayed, Example:
Offset Err, Cal Slope Err If any Err
messages appear the channel needs to be re-calibrated. Repeat Section 5.3.1 Low Cal/ZeroCal Adjust making sure to use a
cylinder of 20.9% Oxygen.
Cylinder of Gas
Cylinder Valve
and Regulator
Calibration/Sample Port Fitting
Humidifier
Example of
Regulator