Maintenance And Fault Rectification; Maintenance; Rectify Malfunctions - Burkert 8186 Manuel D'utilisation

Reaction when malfunc-
tions occur
Causes of malfunction
Fault rectification
Checking the 4 ... 20 mA
signal
LEVEL TRANSMITTER 8186 • 4 ... 20 mA/HART two-wire
8 Maintenance and fault rectification

8.1 Maintenance

When the instrument is used properly, no special maintenance is
required in normal operation.

8.2 Rectify malfunctions

The operator of the system is responsible for taking suitable measures
to remove interferences.
LEVEL TRANSMITTER 8186 offers a maximum of reliability is
ensured. Nevertheless, faults can occur during operation. These may
be caused by the following, e.g.:
Sensor
l
Process
l
Voltage 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 handmultimeter 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:
Error Cause
4 ... 20 mA signal
Level fluctuations Set damping via the indicating and
not stable
4 ... 20 mA signal
Electrical con-
missing nection faulty
Voltage supply
missing
Operating voltage
too low or load
resistance too
high
Current signal Oscillator in the
greater than 22 mA
sensor defective
or less than
3.6 mA
8 Maintenance and fault rectification
Removal
adjustment module
Check connection according to chap-
Connection steps
ter "
essary, correct according to chapter
Wiring plan
" "
Check cables for breaks; repair if
necessary
Check, adapt if necessary
Exchange the instrument or send it in
for repair
" and if nec-
33