NivoRadar
®
Continuous level measurement
Series NR 4000
Technical information / Instruction manual
page 35
Diagnostics and servicing
Maintenance
If the device is used properly, no special maintenance is required in
normal operation.
In some applications, buildup on the antenna system can influence
the measuring result. Depending on the sensor and application, take
measures to avoid heavy soiling of the antenna system. If neces-
sary, clean the antenna system in certain intervals.
The cleaning helps that the type label and markings on the instru-
ment are visible.
Take note of the following:
•
Use only cleaning agents which do not corrode the housings,
type label and seals
•
Use only cleaning methods corresponding to the housing protec-
tion rating
Rectify faults
The operator of the system is responsible for taking suitable meas-
ures to rectify faults.
The device offers maximum reliability. Nevertheless, faults can oc-
cur during operation. These may be caused by the following, e.g.:
•
Sensor
•
Process
•
Voltage supply
•
Signal processing
The first measures are:
•
Evaluation of fault messages
•
Checking the output signal
•
Treatment of measurement errors
A smartphone/tablet with the adjustment app offer you further com-
prehensive diagnostic possibilities. In many cases, the reasons can
be determined in this way and faults rectified.
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.
Diagnosis, fault messages
Connect a multimeter in the suitable measuring range according to
the wiring plan. The following table describes possible errors in the
current signal and helps to eliminate them:
Maintenance
Precaution measures
against buildup
Cleaning
Reaction when malfunc-
tion occurs
Causes of malfunction
Fault rectification
Reaction after fault recti-
fication
4 … 20 mA signal
