Check Hart Communications - Emerson Micro Motion SGM Configuration And Use Manual

Troubleshooting
March 2021
3. Check the trim results. If any trim result is less than −200 microamps or greater than +200 microamps,
contact customer service.
14.17.2 Trim mA Outputs using a field communicator
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.
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.
Procedure
1. Choose Service Tools → Maintenance → Routine Maintenance → Trim mA Output 1 or Service Tools
→ Maintenance → Routine Maintenance → Trim mA Output 2.
2. Follow the instructions in the guided method.
Important
The HART signal over the primary mA Output affects the mA reading. Disconnect the wiring between a
field communicator and the transmitter terminals when reading the primary mA Output at the
receiving device. Reconnect to continue the trim.
3. Check the trim results. If any trim result is less than −200 microamps or greater than +200 microamps,
contact customer service.

14.18 Check HART communications

If you cannot establish or maintain HART communications, or if the primary mA Output is producing a fixed
value, you may have a wiring problem or a HART configuration problem.
Prerequisites
You may need one or more of the following:
• The installation manual for your meter
• A field communicator
• A voltmeter
• Optional: The HART Application Guide, available at
Procedure
1. Verify the HART address.
Tip
The default HART address is 0. This is the recommended value unless the device is in a multidrop
network.
140
www.hartcomm.org
Micro Motion Gas Specific Gravity Meters (SGM)
Configuration and Use Manual
MMI-20020954