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Gas detector is 4 ~ 20 ma output current

The cause of the problem 1: connection error; Methods: according to the instruction guide, rewiring.
The cause of the problem 2: sensor (the fault occurs, the probe will quote F1 fault); Methods: to insert or replace the sensor
The cause of the problem 3: circuit fault; Processing method: contact with wing rapid after-sales service department, returned to the factory maintenance.

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