Check Ma Output Fault Action; Trim Ma Output - Emerson Micro Motion 9739 MVD Configuration And Use Manual

Troubleshooting
June 2019
Table 10-6: Milliamp output problems and recommended actions
Problem Possible causes
Consistently incorrect •
mA measurement
•
•
•
•
mA Output correct at •
lower current, but
incorrect at higher
current

10.19 Check mA Output Fault Action

The mA Output Fault Action controls the behavior of the mA Output if the transmitter encounters an internal
fault condition. If the mA Output is reporting a constant value below 4 mA or above 20 mA, the transmitter
may be in a fault condition.
Procedure
1. Check the status alerts for active fault conditions.
2. If there are active fault conditions, the transmitter is performing correctly. If you want to change its
behavior, consider the following options:
• Change the setting of mA Output Fault Action.
• For the relevant status alerts, change the setting of Alert Severity to Ignore.
Restriction
For some status alerts, Alert Severity is not configurable.
3. If there are no active fault conditions, continue troubleshooting.

10.20 Trim mA Output

Trimming an mA Output calibrates the transmitter's mA Output to the receiving device. If the current trim
value is inaccurate, the transmitter will under-compensate or over-compensate the output.
10.20.1 Trim mA Output using ProLink III
Trimming the mA Output establishes a common measurement range between the transmitter and the device
that receives the mA Output.
Prerequisites
Ensure that the mA Output is wired to the receiving device that will be used in production.
150
Loop problem
Output not trimmed correctly
Incorrect measurement unit configured for
process variable
Incorrect process variable configured
LRV and URV are not set correctly
mA loop resistance may be too high
Configuration and Use Manual
(continued)
Recommended actions
• Check the mA Output trim.
• Verify that the measurement units are
configured correctly for your application.
• Verify the process variable assigned to the
mA Output.
Check the settings of Upper Range Value
•
and Lower Range Value.
• Verify that the mA Output load resistance
is below the maximum supported load (see
the installation manual for your
transmitter).
Micro Motion 9739 MVD Transmitters
MMI-20016855