ENMET PROAIR 2200 - Manual (Page 11)

P RO A IR 2200 ENMET Corporation
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3.4.2 Optional 4-20mA Outputs
Isolated 4-20 mA outputs are available for data logging or other purposes. An output is supplied for each sensor supplied in a
particular instrument, and can be added when a sensor is added in the field. These outputs are available on the Connector 1 for
channels 1 & 2 and Connector 2 for channels 3 & 4.
4mA corresponds to a sensor reading at the bottom of the instrument range and 20mA corresponds to a full scale reading.
Standard ranges are shown in
Table 2.
Table 2: Sensor Output
Sensor 4mA 20mA
CO 0 50
Dew Point -112 °F 68 °F
O
2
0 30
CO
2
0 5000
HC 0 100
Wiring requirements are the same as for the relays.
3.5 Installation Verification
All instruments are calibrated at the factory. You may, if a calibration kit is available, calibrate the any and all gas channels of
the instrument 24 hours after installation to verify proper installation and instrument operation. See
Section 5.0, Maintenance,
for calibration instructions. Calibration is also recommended after the first month of operation. Subsequent calibrations should
be performed every 3 months. The dew point sensor can not be calibrated in the field.