Maintenance And Fault Rectification 7.1 Maintenance - Siemens SITRANS LVL100 Operating Instructions Manual

Reaction when malfunc-
tions occur
Failure reasons
Fault rectification
Checking the switching
signal
Reaction after fault recti-
fication
20
7 Maintenance and fault rectification
7.1 Maintenance
If the instrument is used properly, no special maintenance is required
in normal operation.
7.2 Rectify faults
The operator of the system is responsible for taking suitable meas-
ures to rectify faults.
SITRANS LVL100 offers maximum reliability. Nevertheless, faults can
occur during operation. These may be caused by the following, e.g.:
•
Sensor
•
Process
•
Voltage supply
•
Signal processing
The first measure to be taken is to check the output signal. In many
cases, the causes can be determined this way and the faults rectified.
Error Cause
Green signal Voltage supply in-
lamp off terrupted.
Electronics de-
fective
Red signal lamp Error with the
lights (switching electrical con-
output high-im- nection
pedance)
Shortcircuit or
overload
Red signal lamp Virbating fre-
flashes (switching quency out of
output high-im- specification
pedance)
Buildup on the vi-
brating element
Vibrating element
damaged
Depending on the reason for the fault and the measures taken, the
steps described in chapter "Set up" may have to be carried out again.
7.3 Instrument repair
If it is necessary to repair the instrument, please contact Siemens
Milltronics Process Instruments Inc. You find the locations on our
homepage "www.siemens.com/processautomation".
SITRANS LVL100 - Operating Instructions
Rectification
Check the voltage supply and the ca-
ble connection
Exchange the instrument or send it in
for repair
Connect the instrument according to
the wiring plan
Check the electrical connection
Check the vibrating element on build-
up and remove it
Check the vibrating element and
the sensor if there is buildup and re-
move it
Check if the vibrating element is dam-
age or extremely corroded