SEA CCT 440 Manuel D'installation Et Programmation page 33

INTERVENTION
S.E.A. Società Elettromeccanica Arzignanese S.p.A.
on the screen there can be the flashing
indication n ICF or n SCF, where n indicates
the number of the damaged channel. In
case a temperature is displayed, it means
that the channel has previously experienced
abnormal travels (see INTERVENTION
section). By scrolling with the keys, it is
possible to observe the status of the other
channels.
- Lack of supply voltage to the power unit
- Breakdown in the power unit
- Breakdown or anomaly in the thermometer
probes (see table 1)
- The value of the read temperature is higher than
200°C
- Interrupted probe
- The value of the read temperature is lower than
-10°C
- Short circuit probe
- Unreliable reading: The value of the read
temperature is highly variable through a
dynamic which is not compatible with the
dynamic of the equipment to control. There
could be some micro-interruptions of the signal
or some short-term short circuits. The
measurement signal could be disturbed. In this
case, a value that the power unit infers starting
from the inlet signal appears on the monitor of
the power unit. The indication of the channel
deemed damaged will not be assessed for the
device protection purposes. By scrolling with
the keys, it is possible to observe the status of
the other channels.
CCT 442
- In case of fault of the active probes, the output
4-20mA or 0-20mA is switched off at zero
33
ENGLISH
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