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181
Reference Manual
00809-0100-4530, Rev DD
May 2016
7.21
Troubleshooting guide
If there is a malfunction despite the absence of diagnostic messages, see
for
information on possible causes.
Table 7-3. Troubleshooting Chart
Symptom
Possible cause
Action
No level reading
Power disconnected
Data communication cables
disconnected
Probe is not connected
Check the power supply
Check the cables for serial data
communication
View the Diagnostic window, see
in order to
check active status messages
Check if “Probe Missing” is active. If it
is, check the probe connection
No HART communication.
COM Port configuration does not
match the connected COM Port
Cables may be disconnected
Wrong HART address is used
Hardware failure
HART resistor
Check that correct COM Port is
selected in the HART server (see
“Specifying the COM port” on
page 100
Check wiring diagram
Verify that the 250
resistor is in the
loop.
Check cables
Make sure that correct HART short
address is used. Try address=0
Check Analog Output current value to
verify that transmitter hardware works
Check that the correct settings are
used in RRM. Select Device, Search
from the menu. Click Settings and
HART tab. Make sure the values are
properly chosen. The standard values
are shown on
Analog Out is set in Alarm.
Measurement or transmitter failure.
View the Diagnostic window, see
to check active
error and status messages.
Both Surface pulse and Interface
Pulse are detected, but Interface
Level is reported as unknown in the
Echo Curve plot.
Measurement Mode is set to “Level
Only”.
Set Measurement Mode to “Level and
Interface” (see
Both Surface pulse and Interface
pulse are detected, but Interface
Level is reported as unknown in the
Echo Curve plot.
Interface pulse is identified as a
double bounce
Surface pulse and Interface pulse
are very close
No action required. Use the Echo Curve
plot to verify that the surface and interface
are close, see