Maintenance And Fault Rectification; Maintenance; Remove Interferences - Burkert 8185 Mise En Service

Maintenance and fault rectification
Causes of malfunction
Fault clearance
Checking the 4 ... 20 mA sig-
nal
28
7 Maintenance and fault rectification

7.1 Maintenance

When used as directed in normal operation, LEVEL TRANS-
MITTER 8185 is completely maintenance free.

7.2 Remove interferences

LEVEL TRANSMITTER 8185 offers maximum reliability.
Nevertheless, faults can occur during operation. These may be
caused by the following, e.g.:
Sensor
l
Process
l
Supply
l
Signal processing
l
The first measures to be taken are to check the output signal
and evaluate fault messages via the indicating/adjustment
module. The procedure is described below.
Connect a handheld multimeter in the suitable measuring
range according to the wiring plan.
?
4 ... 20 mA signal not stable
l
Level fluctuations
à
Set integration time via the indicating/adjustment
module
?
4 ... 20 mA signal missing
l
Wrong connection
à
Check connection according to chapter "Connection
steps" and if necessary, correct according to chapter
"Wiring plan"
l
No voltage supply
à
Check cables for breaks; repair if necessary
l
supply voltage too low or load resistance too high
à
Check, adapt if necessary
?
Current signal greater than 22 mA or less than 3.6 mA
l
Electronics module defective
à
Exchange instrument or return instrument for repair
LEVEL TRANSMITTER 8185 - 4 ... 20 mA/HART