Emerson Rosemount 2088 Reference Manual page 80

Troubleshooting
April 2021
Table 6-2: Rosemount troubleshooting for 1–5 Vdc output
Symptom
Transmitter not communicating
with Field Communicator
Transmitter voltage 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
Voltage reading is erratic
80
Corrective actions
Check power wires for reversed polarity
Check that power wires are connected to signal terminals
Check for open diode across test terminal
Verify terminal voltage is 5.8 to 28.0 Vdc
Check loop resistance, 250 Ω minimum (PS voltage -
transmitter voltage/loop current)
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 1–5 Vdc or saturation levels
Have Field Communicator poll for all addresses
Verify applied pressure
Verify 1–5 Vdc 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 1–5 Vdc 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
Rosemount 2088, 2090P, and 2090F Pressure Transmitter Reference Manual
Reference Manual
00809-0100-4108
(continued)