Emerson Rosemount 2051 Reference Manual page 81

Reference Manual
00809-0100-4101
5.3.2 Transmitter not communicating with communication
device
Recommended actions
5.3.3 Transmitter voltage reading is low or high
Recommended actions
5.3.4 Transmitter will not respond to changes in applied
pressure
Recommended actions
5.3.5 Digital pressure variable reading is low or high
Recommended actions
Reference Manual
1. Verify terminal voltage is 5.8 to 28.0 Vdc.
2. Check loop resistance.
(Power supply voltage - transmitter voltage)/loop current should be 250 Ω
minimum.
3. Check that power wires are connected to signal terminals and not test
terminals.
4. Verify clean DC power to transmitter.
Maximum AC noise is 0.2 volts peak to peak.
5. Verify the is output between 1-5 Vdc or saturation levels.
6. Use communication device to poll for all addresses.
1. Verify applied pressure.
2. Verify 1-5 Vdc range points.
3. Verify output is not in
4. Perform analog trim.
5. Check that the power wires are connected to the correct signal terminals
(positive to positive, negative to negative) and not the test terminal.
1. Check impulse piping or manifold for blockage.
2. Verify applied pressure is between the 1-5 Vdc points.
3. Verify the output is not in
4. Verify transmitter is not in
5. Verify transmitter is not in
6. Check test equipment.
1. Check impulse piping for blockage or low fill in wet leg.
2. Verify transmitter is calibrated properly.
3. Check test equipment (verify accuracy).
4. Verify pressure calculations for application.
condition.
Alarm
condition.
Alarm
mode.
Loop Test
mode.
Multidrop
Troubleshooting
March 2024
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