Emerson MMI-20019043 Manuel D’Utilisation
12.6
Milliamp output problems
Milliamp output problems and recommended actions
Table 12-6:
Problem
Possible causes
Recommended actions
No mA output
•
Wiring problem
•
Circuit failure
•
Channel not configured for desired output
•
Check the power supply and power supply
wiring. See
wiring. See
•
Check the mA output wiring.
•
Check the Fault Action settings. See
•
Measure DC voltage across output termi-
nals to verify that the output is active.
nals to verify that the output is active.
•
Contact Micro Motion.
Loop test failed
•
Power supply problem
•
Wiring problem
•
Circuit failure
•
Channel not configured for desired output
•
Incorrect internal/external power configu-
ration
ration
•
Check the power supply and power supply
wiring. See
wiring. See
•
Check the mA output wiring.
•
Check the Fault Action settings. See
•
Contact Micro Motion.
mA output below 4
mA
mA
•
Open in wiring
•
Bad output circuit
•
Process condition below LRV
•
LRV and URV are not set correctly
•
Fault condition if fault action is set to inter-
nal zero or downscale
nal zero or downscale
•
Bad mA receiving device
•
Check your process conditions against the
values reported by the flowmeter.
values reported by the flowmeter.
•
Verify that the receiving device, and the
wiring between the transmitter and the re-
ceiving device.
wiring between the transmitter and the re-
ceiving device.
•
Check the settings of Upper Range Value and
Lower Range Value
Lower Range Value
.
•
Check the Fault Action settings. See
Constant mA output
•
Incorrect process variable assigned to the
output
output
•
Fault condition exists
•
Non-zero HART address (mA output 1)
•
Output is configured for loop test mode
•
Zero calibration failure
•
Verify the output variable assignments.
•
View and resolve any existing alarm condi-
tions.
tions.
•
Check the HART address and Loop Current
Mode
Mode
.
•
Check to see if a loop test is in process (the
output is fixed).
output is fixed).
•
Check HART burst mode configuration.
See
See
•
If related to a zero calibration failure, cycle
power to the meter and retry the zeroing
procedure.
power to the meter and retry the zeroing
procedure.
Troubleshooting
224
Micro Motion
®
Model 2700 Transmitters with Analog Outputs