Endress+Hauser Prosonic T FMU 130 - Fault Analysis

29Endress+Hauser
Prosonic T - FMU 130, 131, 230, 231, 232
Fault Analysis
Current Output Possible Cause Removal
➀ Bar display flashes. Response of the current output Error code in V9H0. – Which error code?
depends on the setting in V0H7. See page 28.
– Further action depends on the error
V0H7 = 0 -10% 2.4 mA or code.
3.8 mA
V0H7 = 1 110% 22 mA E641 in V9H0 – Check sensor position.
V0H7 = 2 HOLD Last value Echo too weak or See pages 8-11, 25.
is held foam on the surface.
➁ Measured value in Distance D in V0H8 Multiple echo? See ➄
V0H0 too small. too large? – Gas layering? Contact E+H Service.
– Check sensor position.
See pages 8-11, 25.
Incorrect linearization? – Re-enter linearization curve
See pages 22 – 23 .
Incorrect current output? – Check values in V0H5 and V0H6
and re-enter if necessary.
See page 24 .
➂ Measured value in Distance D in V0H8 Interference from internals in the
V0H0 too large. too small? measuring range?
Instrument mounted in nozzle?
– Check dimensions of nozzle.
See page 9.
– Check sensor position.
See pages 8-11, 25.
– Select application parameter
0 or 2 in V0H3.
See page 21.
– Carry out interference echo
suppression.
See page 25.
Incorrect linearization? Re-enter linearization curve.
See pages 22-23.
Incorrect current output? Check values in V0H5 and V0H6 and
re-enter if necessary.
See page 24.
yes
yes
yes
yes
yes
yes
yes
no
no
no
no
yes
Expected
Actual
Expected
Actual