Troubleshooting
10.6
Milliamp output problems
Table 10-6
Milliamp output problems and recommended actions
Problem
Possible causes
Recommended actions
No mA output
•
Wiring problem
•
Circuit failure
•
Check the power supply and power
supply wiring. See Section 10.9.
•
Check the
Fault Action
settings. See
Section 10.18 .
•
Measure DC voltage across output
terminals to verify that the output is
active.
•
Check the mA output wiring.
•
Contact Micro Motion.
Loop test failed
•
Power supply problem
•
Incorrect internal/external power
configuration
•
Output not powered
•
Wiring problem
•
Circuit failure
•
Check the power supply and power
supply wiring. See Section 10.9.
•
Check the
Fault Action
settings. See
Section 10.18 .
•
Check the mA output wiring.
•
Contact Micro Motion.
mA output below 4
mA
•
Process condition below LRV
•
LRV and URV are not set correctly
•
Fault condition if fault indicator is set to
internal zero or downscale
•
Open in wiring
•
Bad mA receiving device
•
Bad output circuit
•
Verify process conditions.
•
Check the settings of
Upper Range Value
and
Lower Range Value
. See Section
•
Check the
Fault Action
settings. See
Section 10.18 .
•
Verify that the receiving device, and
the wiring between the transmitter and
the receiving device
Constant mA output
•
Non-zero HART address (mA output 1)
•
Output is fixed in text mode
•
Zero calibration failure
•
Check the HART address and
Loop
Current Mode
. See Section 10.14,
•
Check the loop test mode.
•
Check HART burst mode configuration.
See Section 10.15.
•
If related to a zero calibration failure,
cycle power to the meter and retry the
zeroing procedure.
mA output
consistently out of
range
•
Fault condition if fault indicator is set to
upscale or downscale
•
LRV and URV are not set correctly
•
Check the
Fault Action
settings. See
Section 10.18 .
•
Check the settings of
Upper Range Value
and
Lower Range Value
. See Section
188
Micro Motion 9739 MVD Transmitters
