MedAir
ENMET
Manual Release Date – June 9, 2017
P a g e
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Manual Part No. – 80002-042
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
O2
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 cannot be calibrated in the field.