Exchanging The Electronics Module - Siemens SITRANS LG250 Operating Instructions Manual

Measurement error during emptying
Fault description
7. Measured value re-
mains unchanged in
the close range during
emptying
8. Measured value re-
mains reproducible
in one position during
emptying
Reaction after fault recti-
fication
64
Error pattern Cause
– False signal larger than the
level echo
– Level echo too small
0
time
– Stored false signals in this
position are larger than the
level echo
0
time
Depending on the reason for the fault and the measures taken, the
steps described in chapter "Setup" must be carried out again or must
be checked for plausibility and completeness.

10.5 Exchanging the electronics module

If the electronics module is defective, it can be replaced by the user.
With SIL qualified instrument, only a respective electronics module
with SIL qualification must be used.
In Ex applications, only instruments and electronics modules with ap-
propriate Ex approval may be used.
Order the replacement electronics module through the agency
serving you. The electronics modules are adapted to the respective
sensor.
It is absolutely necessary that the factory settings of the sensor are
loaded into the electronics module. Therefore please state the serial
number of the sensor when ordering the replacement electronics
module.
The serial numbers are stated on the type label of the instrument,
inside the housing or on the delivery note.
The replacement electronics module is provided with the serial
number of the appropriate sensor. Check if the serial number on the
replacement electronics module and the serial number of the sensor
correspond.
All user-specific settings must be entered again. Hence, you have to
carry out a new setup after the electronics exchange.
If you have stored the data of the parameter adjustment during the
first setup of the sensor, you can transfer these to the replacement
electronics module. A new setup is no more necessary.
After the new setup and the transfer of the parameterization date, you
have to verify the parameters. Only then, the instrument will be ready
for operation, again.
SITRANS LG250 - Operating Instructions
Rectification
– Eliminate false signals in the
close range
– Remove contamination on the
probe. After having removed
the source of the false signals,
the false signal suppression
must be deleted.
– Carry out a new false signal
suppression
– Delete false signal suppression
– Carry out a new false signal
suppression
PBD-51041387