Emerson Rosemount 3051S MultiVariable - Page 134

Table 5-1: Diagnostic Message Troubleshooting (continued)
LCD display messages Host diagnostic
message
Possible problems Recommended
actions
(LCD is reading
normally)
Configuration changed A modification has
been made to the
device configuration
using a host other than
AMS Device Manager.
No action is required;
message will clear after
a change is made using
AMS.
(LCD is reading
normally)
Cold start Transmitter was
restarted.
No action is required;
message will clear
automatically.
(1) LCD display messages will vary as it is specific to the possible problem.
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.
Troubleshooting Reference Manual
October 2018 00809-0100-4803
134 Rosemount 3051S Multivariable Transmitter