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8 Maintenance and fault rectification
WIKA Operating Instructions - Process pressure transmitter IPT-1*
8 Maintenance and fault rectification
8.1 Maintenance
If the instrument is used properly, no special maintenance is required
in normal operation.
In some applications, product buildup on the diaphragm can influence
the measuring result. Depending on the sensor and application, take
precautions to ensure that heavy buildup, and especially a hardening
thereof, is avoided.
The diaphragm should be cleaned if necessary. For this reason, the
resistance of the materials to cleaning processes must be ensured.
The large variety of chemical seal applications makes special clean-
ing instructions for each application necessary. Please contact the
agency serving you.
Caution:
On instruments with a chemical seal, never clean the separating
diaphragm mechanically with hard objects, such as tools! This can
damage the diaphragm and lead to filling oil leaks.
8.2 Rectify faults
The operator of the system is responsible for taking suitable meas-
ures to rectify faults.
IPT-1* offers maximum reliability. Nevertheless, faults can occur dur
-
ing operation. These may be caused by the following, e.g.:
•
Sensor
•
Process
•
Voltage supply
•
Signal processing
The first measures to be taken are to check the output signals as well
as to evaluate the error messages via the display and adjustment
module. The procedure is described below. Further comprehensive
diagnostics can be carried out on a PC with the software PACTware
and the suitable DTM. In many cases, the causes can be determined
and the faults rectified this way.
Connect a multimeter in the suitable measuring range according to
the wiring plan.
Error code Cause
Rectification
4 … 20 mA
signal not
stable
Level fluctuations
– Set the integration time via the
display and adjustment module or
PACTware
No atmospheric pres
-
sure compensation
– Check the pressure compensation
in the housing and clean the filter
element, if necessary
Maintenance
Cleaning
Reaction when malfunc-
tion occurs
Causes of malfunction
Fault rectification
Check the 4 … 20 mA
signal