Burkert 8136 Mode D'emploi page 52

Procedure for fault recti-
fication
Check the 4 ... 20 mA
signal
LEVEL TRANSMITTER 8136 • 4 ... 20 mA/HART - two-wire
Code Cause
Text mes-
sage
M500 – With the reset to delivery
status, the data could not
Error with the
be restored
reset delivery
status
M501 – Hardware error EEPROM
Error in the
non-active
linearization
table
M502 – Hardware error EEPROM
Error in the
diagnosis
memory
M503 – The echo/noise ratio is too
small for reliable measure-
Meas. reliabil-
ment
ity too low
M504 – Hardware defect
Error on an
device inter-
face
M505 – Level echo can no longer
be detected
No echo avail-
able
9.4 Rectify faults
The first measures are:
•
Evaluation of fault messages, for example via the display and
adjustment module
•
Checking the output signal
•
Treatment of measurement errors
Further comprehensive diagnostics options are available with a PC
with PACTware and the suitable DTM. In many cases, the reasons can
be determined in this way and faults rectified.
Connect a multimeter in the suitable measuring range according to
the wiring plan. The following table describes possible errors in the
current signal and helps to remove them:
9 Diagnosis, asset management and service
Rectification
– Repeat reset
– Load XML file with sensor
data into the sensor
– Exchanging the electronics
– Send instrument for repair
– Exchanging the electronics
– Send instrument for repair
– Check installation and
process conditions
– Clean the antenna
– Change polarisation direc-
tion
– Use instrument with higher
sensitivity
– Check connections
– Exchanging the electronics
– Send instrument for repair
– Clean the antenna
– Use a more suitable
antenna/sensor
– Remove possible false
echoes
– Optimize sensor position
and orientation
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