Milliamp output problems and recommended actions
(continued)
Table 12-2:
Problem
Possible causes
Recommended actions
mA Output below
4 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
•
Bad mA receiving device
•
Check your process conditions against the
values reported by the device.
•
Verify the receiving device, and the wiring
between the transmitter and the receiving
device.
•
Check the settings of Upper Range Value
and Lower Range Value.
•
Check the Fault Action settings.
•
Verify channel configuration for the affec-
ted mA Output.
Constant mA Output
•
Incorrect process variable assigned to the
output
•
Fault condition exists
•
Non-zero HART address (mA Output 1)
•
Output is configured for loop test mode
•
Zero calibration failure
•
Output is configured for a range that is far
in excess of intended range. Reconfigure
output.
•
The process condition is below cutoff.
•
Verify the output variable assignments.
•
View and resolve any existing alert condi-
tions.
•
Check the HART address. If the HART ad-
dress is non-zero, you may need to change
the setting of mA Output Action.
•
Check to see if a loop test is in process (the
output is fixed).
•
Check HART burst mode configuration.
•
If related to a zero calibration failure, cycle
power to the meter and retry the zeroing
procedure.
•
Process condition is below cutoff. Check
and adjust the cutoff setting.
mA Output consis-
tently out of range
•
Incorrect process variable or units assigned
to output
•
Fault condition if Fault Action is set to
Up-
scale
or
Downscale
•
LRV and URV are not set correctly
•
Verify the output variable assignments.
•
Verify the measurement units configured
for the output.
•
Check the Fault Action settings.
•
Check the settings of Upper Range Value
and Lower Range Value.
•
Check the mA Output trim.
Consistently incorrect
mA measurement
•
Loop problem
•
Output not trimmed correctly
•
Incorrect measurement unit configured for
process variable
•
Incorrect process variable configured
•
LRV and URV are not set correctly
•
Check the mA Output trim.
•
Verify that the measurement units are con-
figured correctly for your application.
•
Verify the process variable assigned to the
mA Output.
•
Check the settings of Upper Range Value
and Lower Range Value.
mA Output correct at
lower current, but in-
correct at higher cur-
rent
•
mA loop resistance may be set too high
•
Verify that the mA Output load resistance
is below the maximum supported load
(see the installation manual for your trans-
mitter).
Troubleshooting
Configuration and Use Manual
175
Summary of Contents for Micro Motion 2500
Page 8: ...Contents vi Micro Motion Model 2500 Transmitters with Configurable Input Outputs ...
Page 10: ...Getting started 2 Micro Motion Model 2500 Transmitters with Configurable Input Outputs ...
Page 18: ...Quick start 10 Micro Motion Model 2500 Transmitters with Configurable Input Outputs ...
Page 237: ...NE 53 history Configuration and Use Manual 229 ...
