Check Lower Range Value And Upper Range Value; Check Ma Output Fault Action; Check For Radio Frequency Interference (Rfi) - Emerson Micro Motion SGM Configuration And Use Manual

Troubleshooting
March 2021

14.19 Check Lower Range Value and Upper Range Value

If the process variable assigned to the mA output falls below the configured Lower Range Value (LRV) or rises
above the configured Upper Range Value (URV), the meter will post a saturation alert (A100 or A113), then
perform the configured fault action.
Procedure
1. Record your current process conditions.
2. Check the configuration of the LRV and URV.
Related information
Configure Lower Range Value (LRV) and Upper Range Value (URV)

14.20 Check mA Output Fault Action

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.

14.21 Check for radio frequency interference (RFI)

The meter's TPS output or discrete output can be affected by radio frequency interference (RFI). Possible
sources of RFI include a source of radio emissions, or a large transformer, pump, or motor that can generate a
strong electromagnetic field. Several methods to reduce RFI are available. Use one or more of the following
suggestions, as appropriate to your installation.
Procedure
• Use shielded cable between the output and the receiving device.
— Terminate the shielding at the receiving device. If this is impossible, terminate the shielding at the
cable gland or conduit fitting.
— Do not terminate the shielding inside the wiring compartment.
— 360-degree termination of shielding is unnecessary.
• Eliminate the RFI source.
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Configuration and Use Manual
Micro Motion Gas Specific Gravity Meters (SGM)
MMI-20020954