Faults - Festo SPTW-B2R Mode D'emploi

8. Faults

8. Faults
First ensure that the system is under pressure (open valves/ball valves etc.) and that the correct power supply
EN
and correct wiring type (2-wire/3-wire) has been selected.
Faults
No output signal
Deviating zero point signal
Deviating zero point signal
Constant output signal upon change in
pressure
Signal span too small
Signal span varies
Signal span varies/inaccurate
Signal span drops/too small
CAUTION!
If faults cannot be eliminated by means of the measures listed above, the instrument must be
shut down immediately, and it must be ensured that pressure and/or signal are no longer present,
and it must be prevented from being inadvertently put back into service. In this case, contact the
manufacturer. If a return is needed, follow the instructions given in chapter "9.2 Return".
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Causes
Cable break
Overpressure safety exceeded
Too high/low working temperature
Mechanical overload caused by overpressure
Mechanical overload caused by overpressure
EMC interference sources in the environment;
for example, frequency converter
Too high/low working temperature
Signal span drops/too small
Measures
Check the through drilling
Observe the permissible overpressure safety
(see Chapter "3. Specifications")
Observe the permissible temperatures
(see Chapter "3. Specifications")
Replace instrument; if it fails repeatedly,
contact the manufacturer
Replace instrument; if it fails repeatedly,
contact the manufacturer
Shield instrument; cable shield; remove source
of interference
Observe the permissible temperatures
(see Chapter "3. Specifications")
Contact manufacturer and replace instrument
Pressure transmitter SPTW