111
Reference Manual
00809-0100-4803, Rev GA
Troubleshooting
September 2017
Troubleshooting
Table 5-2. Transmitter Troubleshooting
Symptom
Corrective actions
Transmitter milliamp output is zero
Verify power is applied to signal terminals.
Check power wires for reversed polarity.
Verify terminal voltage is 12 to 42.4 Vdc.
Check for open diode across test terminal on Rosemount 3051SMV terminal block.
Transmitter not communicating with Field
Communicator, AMS Device Manager, or
Engineering Assistant
Verify the output is between 4 and 20 mA or saturation levels.
Verify clean DC Power to transmitter (Max AC noise 0.2 volts peak to peak).
Check loop resistance, 250–1321
Ω
.
Loop Resistance = (Power supply voltage - transmitter voltage)/loop current
Check if unit is at an alternate HART address.
Transmitter milliamp output is low or high
Verify applied process variables.
Verify 4 and 20 mA range points and flow configuration.
Verify output is not in alarm or saturation condition.
An analog output trim or sensor trim may be required.
Transmitter will not respond to changes in
measured process variables
Check to ensure that the equalization valve is closed.
Check test equipment.
Check impulse piping or manifold for blockage.
Verify primary variable measurement is between the 4 and 20 mA set points.
Verify output is not in alarm or saturation condition.
Verify transmitter is not in Loop Test, Multidrop, Test Calculation,
or Fixed Variable mode.
Digital Variable output is low or high
Check test equipment (verify accuracy).
Check impulse piping for blockage or low fill in wet leg.
Verify transmitter sensor trim.
Verify measured variables are within transmitter limits.
Digital Variable output is erratic
Check application for faulty equipment in process line.
Verify transmitter is not reacting directly to equipment turning on/off.
Verify damping is set properly for application.
Milliamp output is erratic
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.
Transmitter output is normal, but LCD
display is off and diagnostics indicate an
LCD display problem
Verify LCD display is installed correctly.
Replace LCD display.
Transmitter indicating a flow value and/or
DP value during no flow condition
Zero DP sensor
Verify DP Low Flow Cutoff setting.
Содержание 3051S Series
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