Detcon FP-524D-HRT - Manual (Page 46)

Model FP-524D-HRT
FP-524D-HRT Instruction Manual Rev. 0.1 Page 42 of 48
Faulty 4-20mA Output
If sensor has a normal reading with no faults displayed, and the 4-20 mA signal output is 0mA….
Check that wiring is properly connected at terminal blocks and through to controller inputs.
The 4-20mA output loop must be closed (resistance of < 1000 ohms) to avoid the Loop Fault.
Perform a “Signal Output Check” sequence via Section 3.5.6 and verify 4-20mA output with current meter.
Swap with a known-good transmitter module to determine if the transmitter module’s 4-20mA output circuit is
faulty.