CM42-MAA101EBE00 Diagnostics, troubleshooting
Endress+Hauser 19
101 Ref. impedance alarm F
– Check reference electrode for contamination and damage
– Clean reference electrode
102 Glass imp. too low alarm F
– Impedance of glass membrane too low
– Check pH sensor, replace if necessary
103 Ref. imp. too low alarm F
– Reference impedance too low
– Check reference electrode for contamination/clogging
– Replace reference or combined electrode
104 Sensor supply bad F
– Sensor operating voltage fluctuating
– Check connection
– Replace sensor cable or sensor
106 Glass impedance warning M
– Check glass electrode for breakage and hairline cracks
– Check medium temperature
– Check electrode plug-in head for moisture and dry if necessary
107 Ref. impedance warning M
– Check reference electrode for contamination and damage
– Clean reference electrode
111 Glass imp. too low warning M
– Check glass electrode for breakage and hairline cracks
– Check medium temperature
– Check electrode plug-in head for moisture and dry if necessary
112 Ref. imp. too low warning M
– Check reference electrode for contamination and damage
– Clean reference electrode
119 Temp offset lower limit F – Check the temperature sensor of the sensor
– Clean the sensor and recalibrate
– Replace sensor
120 Temp offset lower limit F
127 Invalid TAG group F
Use a sensor with a suitable sensor designation or sensor group.
128 Invalid TAG F
129 Sensor change aborted C Restart the sensor change
130 Calibration active C Wait for the calibration to finish.
131 PV not stable M
– Sensor too old
– Cable or connector defective
132 Temperature not stable M
134 Zero pnt. too high alarm M
– Sensor old or defective
– Diaphragm blocked
– Buffer solutions too old or contaminated
135 Zero pnt. too high warning M
136 Zero pnt. too low warning M
137 Zero pnt. too low alarm M
138 Slope too low alarm M
139 Slope too low warning M
No. Display text Cat. Tests and/or remedial measures
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