Exchanging The Electronics Module; Exchange Or Shorten Cable/Rod - Siemens SITRANS LG270 Operating Instructions Manual

Fault description Cause
Measured value Various echoes from an uneven product
fluctuates around surface, e.g. an extraction funnel
10 ... 20 %
Reflections from the product surface via the
vessel wall (deflection)
0 time
Reaction after fault recti-
fication
Exchanging the cable/rod
PBD-51041506
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.
9.5

Exchanging the electronics module

If the electronics module is defective, it can be replaced by the user.
In Ex applications, only instruments and electronics modules with ap-
propriate Ex approval may be used.
If there is no electronics module available on site, the electronics
module can be ordered through the agency serving you. The electron-
ics modules are adapted to the respective sensor and differ in signal
output or voltage supply.
The new electronics module must be loaded with the default settings
of the sensor. These are the options:
•
In the factory
•
Or on site by the user
In both cases, the serial number of the sensor is needed. The serial
numbers are stated on the type label of the instrument, on the inside
of the housing as well as on the delivery note.
When loading on site, the order data must first be downloaded from
the Internet (see operating instructions "Electronics module").
Caution:
All application-specific settings must be entered again. That's why you
have to carry out a fresh setup after exchanging the electronics.
If you saved the parameter settings during the first setup of the sen-
sor, you can transfer them to the replacement electronics module. A
fresh setup is then not necessary.
9.6

Exchange or shorten cable/rod

The cable or rod (meas. part) of the probe can be shortened, if neces-
sary. To loosen the rod or cable you need a fork spanner with spanner
width 13.
1. Loosen the rod or cable by applying a fork spanner to the flat
surfaces (SW 13), provide counterforce with another fork spanner
(SW 13)
2. Unscrew the loosened rod or cable manually.
3. Place the enclosed new double washer onto the thread.
SITRANS LG270 - Operating Instructions
Rectification
Check parameter "Material Type" and
adapt, if necessary
Optimize installation position and sensor
orientation
65