Emerson Rosemount 2088 Reference Manual page 79

Reference Manual
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Table 6-1: Rosemount troubleshooting table for 4–20 mA output
Symptom
Transmitter milliamps reading is
low or high
Transmitter will not respond to
changes in applied pressure
Digital pressure variable reading is
low or high
Digital pressure variable reading is
erratic
Milliamps reading is erratic
Table 6-2: Rosemount troubleshooting for 1–5 Vdc output
Symptom
Transmitter voltage reading is zero
Reference Manual
Corrective actions
Check that power wires are connected to signal terminals
and not test terminals
Verify clean DC Power to transmitter (Max AC noise 0.2 volts
peak to peak)
Verify the output is between 4 and 20 mA or saturation levels
Have Field Communicator poll for all addresses
Verify applied pressure
Verify 4 and 20 mA range points
Verify output is not in alarm condition
Perform analog trim
Check that power wires are connected to the correct signal
terminals (positive to positive, negative to negative) and not
the test terminal
Check impulse piping or manifold for blockage
Verify applied pressure is between the 4 and 20 mA points
Verify the output is not in alarm condition
Verify transmitter is not in loop test mode
Verify transmitter is not in multidrop mode
Check test equipment
Check impulse piping for blockage or low fill in wet leg
Verify transmitter is calibrated properly
Check test equipment (verify accuracy)
Verify pressure calculations for application
Check application for faulty equipment in pressure line
Verify transmitter is not reacting directly to equipment
turning on/off
Verify damping is set properly for application
Verify power source to transmitter has adequate voltage and
current
Check for external electrical interference
Verify transmitter is properly grounded
Verify shield for twisted pair is only grounded at one end
Corrective actions
Verify terminal voltage is 5.8 to 28.0 Vdc at signal terminals
Troubleshooting
April 2021
(continued)
79