IFM Electronic TAD 91 Series, Руководство по эксплуатации

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10 Fault correction
In case of faults or anomalies:
► Connect unit with a PC�
► Read [Fnr]�
Fnr Type of fault Corrective measures
0 No fault, no anomaly occurred� -/-
20 Internal malfunction in the sensor
electronics�
► Replace the unit�
21 Backup function of the sensor activated,
e�g� a sensor element has failed
(diagnostic case 4 → 5.2.3 )
► Replace the unit�
► Continue measurement with only one
sensor element (backup function):
-In 2-wire operation set [drEd] = ON so
that the measured temperature value
can be continued to be transferred�
Then the analogue output only pro-
vides diagnostic cases of the category
"alarm"�
-In 3-wire operation all diagnostic cas-
es can be signalled via the diagnostic
switching output except those used for
drift monitoring (diagnostic cases 1, 3,
7 → 5.2.3 )�
30 Wiring fault ► Check wiring�
42 Analogue signal 21�5 mA (FOU2 = On)
or 3�5 mA (FOU2 = OFF)
> The switch point is clearly outside
the measuring range�
► Check measuring range�
► Adapt [ASP] value and [AEP] vaule to
the operating conditions�
71 Detected sensor drift exceeds warning
level [drW]
First indication of drift detected�
► Check whether the parameter [drW]
is programmed correctly�
► Prepare replacement of the unit�
72 Detected sensor drift exceeds alarm
level [drA]
Drift exceeds alarm threshold�
Temperature measurement with reduced
accuracy possible�
► Check whether the parameter [drA] is
programmed correctly�
► Replace the unit�