Enmet PROAIR 2200 Manual do Utilizador descarregar pdf (Página 11)

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ENMET Corporation

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

0 30

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.

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Enmet PROAIR 2200 Manual do Utilizador Página 11