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4-20mA outputs

Reference Drawing # 1131

The Model EMS1304 comes with two 4-20mA outputs. The ranges are set during final test to the information

supplied by the customers.

Maximum output Loop compliance is 800 Ohms.

AOUT1 (instantaneous opacity, zero/span when in check mode) is connected at Control unit terminals 11 & 12

and supplies the opacity signal to a recorder or DAS and too the service module 14 & 13 (on TB1, - 1101) for

display at the sensor location.

AOUT 2 (average opacity, zero/span when in check mode) is connected at Control unit terminals 13 & 14.

No calibration is necessary; however if you want to check that other devices such as recorders or DAS are

responding correctly use the following procedure.

Recorder or other device calibration:

On the control unit front panel press the AUTO/MAN key for a maintenance zero and span cycle. Both outputs

will correspond to the opacity display value.

(+) Recorder/DAS (-)

11+

12-

Sensor location

terminal TB 1

EMS1304 Control

unit rear panel

terminals

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 55 56

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EMS 1304 Specifiche Pagina 28