Endress+Hauser Stamosens CSM750, Operating Instructions Manual

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StamoSens CSM 750 / CSS 70 8 Troubleshooting
Hauser 29
8 Troubleshooting
This troubleshooting refers to both measures that
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can be carried out without intervention in the device and
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to device defects, which require components to be replaced.
8.1 Error messages
In this chapter you will find instructions for diagnosis and elimination of errors that occur.
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Warning!
Danger to life.
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Disconnect the device from the mains before opening it. Check the isolation from
supply and secure the switch against unintentional reactivation.
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If work under voltage is required, it must only be carried out by a trained electrician,
a second person must be present for safety reasons.
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Switching contacts can be supplied by separate electric circuits. Switch the voltage
to these electric circuits off as well before you work on the terminals.
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Caution!
Danger for components through electrostatic discharge (ESD).
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Electronic components are susceptible to electrostatic discharge. Protection
measures such as prior discharging of the operator to PE or permanent grounding of
the operator with wrist strap are required.
Particularly dangerous: plastic floors at low humidity and plastic clothing.
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For your own safety, only use genuine spare parts. Function, accuracy and reliability,
also after repairing, are only guaranteed with original parts.
Transmitter error messages CSM 750
Error message Error
frequency Possible cause Measures
Incorrect sensor type – – – – Connected sensor does not correspond to the
sensor selected in the "CONFIGURATION"
menu Replace sensor or correct sensor type in the
"CONFIGURATION" menu
No sensor signal 0 Hz Transmitter is not receiving a frequency signal
from the sensor, e.g. due to a cable break Check electrical connection
E+H Service
Light intensity 205 Hz Sensor outside of the medium;
Incorrect sensor type, e.g. SAK sensor in
activated sludge Check mounting location, check application;
Check sensor type
Sensor soiled 305 Hz Sensor's measuring window soiled Clean sensor
Cross-sensitivity 405 Hz Cross-sensitivity (yellow or red colouring due to
floating substances and solids) falsifies the
measured value Clean sensor, check application
Concentration too
high 505 Hz End of measuring range exceeded Check measuring range and sensor type