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10.13.1 Trim mA outputs using ProLink II
Trimming the mA output establishes a common measurement range between the
transmitter and the device that receives the mA output.
Important
You must trim the output at both ends (0 mA or 4 mA, and 20 mA) to ensure that it is compensated
accurately across the entire output range.
Prerequisites
Ensure that the mA output is wired to the receiving device that will be used in production.
Procedure
1. Choose ProLink > Calibration > Milliamp 1 Trim or ProLink > Calibration > Milliamp 2 Trim.
2. Follow the instructions in the guided method.
Important
If you are using a HART/Bell 202 connection, the HART signal over the primary mA output
affects the mA reading. Disconnect the wiring between ProLink II and the transmitter
terminals when reading the primary mA output at the receiving device. Reconnect to
continue the trim.
3. Check the trim values, and contact Micro Motion customer service if any value is less
than −200 microamps or greater than +200 microamps.
10.13.2
Trim mA outputs using the Field Communicator
Trimming the mA output establishes a common measurement range between the
transmitter and the device that receives the mA output.
Important
You must trim the output at both ends (0 mA or 4 mA, and 20 mA) to ensure that it is compensated
accurately across the entire output range.
Prerequisites
Ensure that the mA output is wired to the receiving device that will be used in production.
Procedure
1. Choose Service Tools > Maintenance > Routine Maintenance > Trim mA output 1.
2. Follow the instructions in the guided method.
Troubleshooting
180 Micro Motion
®
9739 MVD Transmitters