Cerabar M, Deltabar M, Deltapilot M / 4...20 mA HART Troubleshooting
Endress+Hauser 95
8.2 Response of output to errors
The response of the current output to errors is defined in the following parameters:
• "Alarm behavior" (050) ä 120
• "Output fail mode (190) ä 120
• "High alarm current" (052) ä 120
S110 Working range T – Electromagnetic effects are greater than
specifications in the technical data.
– Sensor defective.
– Overtemperature and low temperature
present.
1. Check proc. temp.
2. Check temperature range
S140 Working range P – Electromagnetic effects are greater than
specifications in the technical data.
– Sensor defective.
– Overpressure and low pressure present.
1. Check proc. pressure
2. Check sensor range
S822 Process temp. – The temperature measured in the
sensor is greater than the upper
nominal temperature of the sensor.
– The temperature measured in the
sensor is lower than the lower nominal
temperature of the sensor.
– Loose connection at the sensor cable.
1. Check the temperature
2. Check the setting
S841 Sensor range – Overpressure or low pressure present.
– Sensor defective.
1. Check the pressure value
2. Contact Endress+Hauser
Service
S971 Adjustment – The current is outside the permitted
range 3.8 to 20.5 mA.
– The pressure applied is outside the set
measuring range (but within the sensor
range).
– The calibration carried out would result
in the sensor nominal operating range
being undershot or overshot.
1. Check the pressure value
2. Check the measuring range
3. Check the setting
Diagnostic
code
Error message Cause Measure
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