NIVELCO NIPRESS DD-400, Руководство пользователя

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7. TROUBLESHOOTING
Fault Possible causes Fault detection / remedy
No output signal:
Faulty connection. Check the connections!
Broken wire. Check all wires using a cable tester!
Defective measuring device (signal
input). Check the ampere meter (and its fuse) and the analogue input of the signal processing
unit!
Analog output signal too low:
Load resistance too high. Check the value of the load resistance!
Supply voltage too low. Check the power supply and power / current on the transducer / transmitter!
Power supply failure. Inspect the power supply and the applied supply voltage at the device.
Output signal slightly offset:
The diaphragm of the sensor is
severely contaminated.
Cleaning with non-aggressive cleaning solutions, soft brush or sponge.
The diaphragm of the sensor is
calcified or crusted.
It is recommended to clean carefully to ensure all the dirt is completely removed.
Large offset in the output
signal:
The diaphragm of the sensor is
damaged (caused by overpressure or a
mechanical impact).
Check the diaphragm of the sensor, if it is damaged then send the device back to the
manufacturer!
Incorrect output signal:
Damaged electrical connection Check the connection
Reverse polarity of the pressure
ranges
Ensure that the higher pressure is connected to input “P+”