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XNX Universal Transmitter
Section 5 - Warnings/Faults
119
Fault Description
Appli-
cable
Sensors
Latching / Non-
Latching
Frequency of
Diagnostic
Event History Data Action For Resolution
F165
mA Calibration
failure
all Latching 2 seconds
DAC: Digital to Analog
Converter (4-20 mA
output)
ADC: Analog to Digital
Converter (4-20 mA
internal feedback)
0 OK
1 DAC 4 mA point is
too low
2 DAC 4 mA point is
too high
4 DAC 20 mA point is
too low
8 DAC 20 mA point is
too high
16 ADC 4 mA point is
too low
32 ADC 4 mA point is
too high
64 ADC 20 mA point is
too low
128 ADC 20 mA point
is too high
Indicates that 4-20 mA calibration failed and discarded. Events history
parameter indicates which calibration point has failed. If 4-20 mA cali-
bration fails with F165, no changes take place so the 4-20 mA calibration
output stays as it was. Check 4-20 mA loop resistance. Repeat 4-20 mA
calibration. The fault clears itself after a successful 4-20 mA calibration.
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