Users Manual Part 1

7.3.2 Troubleshooting the 4-20 mA/HART output
Device milliamp reading is zero
Recommended actions
1.
Verify power is applied to signal terminals.
2. Verify power supply voltage is adequate at signal terminals.
3. Verify device and power supply are properly grounded.
Related information
Power supply
Grounding
Device milliamp reading is too low or high
Recommended actions
1. Verify level.
2. Check the settings of the 4-20 mA range values.
3. Verify output is not in alarm condition.
4. Check that power wires are connected to the correct signal terminals.
5. Perform Calibrate Analog Out.
Related information
Upper/lower range value
Alarm mode
Calibrate analog out
Milliamp reading is erratic
Recommended actions
1. Verify power supply voltage is adequate at signal terminals.
2. Check for external electrical interference.
3. Verify device is properly grounded.
4. Verify shield for twisted pair is only grounded at the power supply end.
5. Under turbulent conditions with low level rates, consider increasing the
Damping value.
Related information
Power supply
Grounding
Damping value
Service and troubleshooting Reference Manual
September 2022
00809-0100-4418
84 Emerson.com/Rosemount