Emerson 9739 Manuel D’Utilisation
Milliamp output problems and recommended actions
(continued)
Table 10-6:
Problem
Possible causes
Recommended actions
mA output consis-
tently out of range
tently out of range
•
Incorrect process variable or units assigned
to output
to output
•
Fault condition if fault action is set to up-
scale or downscale
scale or downscale
•
LRV and URV are not set correctly
•
Verify the output variable assignments.
•
Verify the measurement units configured
for the output.
for the output.
•
Check the Fault Action settings. See
•
Check the settings of Upper Range Value and
Lower Range Value
Lower Range Value
.
•
Check the mA output trim. See
Consistently incorrect
mA measurement
mA measurement
•
Loop problem
•
Output not trimmed correctly
•
Incorrect flow measurement unit config-
ured
ured
•
Incorrect process variable configured
•
LRV and URV are not set correctly
•
Check the mA output trim. See
•
Verify that the measurement units are con-
figured correctly for your application.
figured correctly for your application.
•
Verify the process variable assigned to the
mA output.
mA output.
•
Check the settings of Upper Range Value and
Lower Range Value
Lower Range Value
.
mA output correct at
lower current, but in-
correct at higher cur-
rent
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 maximum supported load (see
the installation manual for your transmit-
ter).
is below maximum supported load (see
the installation manual for your transmit-
ter).
10.7
Frequency output problems
Troubleshooting
Configuration and Use Manual
171