Emerson Rosemount 5400 Series Reference Manual page 168

Section 7: Service and Troubleshooting
November 2014
Message
Tank signal clip warning
No surface echo
Predicted level
Sampling failed
Invalid volume value
Simulation Mode
Advanced Simulation
Mode
Tracking Extra Echo
Bottom Projection
Using pipe
measurement
Surface close to
registered false echo.
Sudden level jump
detected.
156
Description
The last Tank Signal was clipped.
The Surface Echo Pulse cannot be
detected.
The presented level is predicted.
The surface echo could not be
detected.
The sampling of the last tank signal
failed.
The given volume value is invalid.
The simulation mode is active. The
presented measurement values are
simulated.
The advanced simulation mode is
active. The given measurements
are simulated.
The transmitter is in the empty
tank state tracking an extra echo.
The bottom projection function is
active.
Pipe Measurement is active.
Close to a registered false echo
measurement accuracy may be
slightly reduced.
This may result from various
measurement problems.
Reference Manual
00809-0100-4026, Rev HA
Action
Check Warning Messages. If MWM
Warning is active, this might indicate a
transmitter error. Contact Emerson
Process Management Service
Department.
Check if the configuration can be
changed so that the surface echo can
be tracked in this current region.
See No surface echo above.
Check Warning Messages.
Check Volume Status for details.
No action needed.
To turn off the Advanced Simulation
mode, set Holding Register 3600 = 0
(see "Analog Output calibration" on
page 142).
See "Extra echo" on page 240
page 245.
See "Tank bottom projection" on
page 240.
No action needed.
By using the Register False Echo
function, the transmitter can track the
product surface in the vicinity of
disturbing objects (see "Echo tuning"
on page 83).
Check the tank to find out what causes
problem tracking the surface.
Service and Troubleshooting
and