Micro Motion CDM100M, Configuration And Use Manual

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10.16 Trim mA outputs
Trimming an mA output calibrates the transmitter's mA output to the receiving device. If
the current trim values are inaccurate, the transmitter will under-compensate or over-
compensate the output.
• Trim mA outputs using ProLink III (Section 10.16.1)
• Trim mA outputs using the Field Communicator (Section 10.16.2)
10.16.1 Trim mA outputs using ProLink III
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 (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. 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 III and the transmitter
terminals when reading the primary mA output at the receiving device. Reconnect to
continue the trim.
2. Check the trim results. If any trim result is less than − 200 microamps or greater than
+200 microamps, contact Micro Motion customer service.
10.16.2 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 (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.
Troubleshooting
158 Micro Motion ® Compact Density Meters (CDM)