Endress+Hauser Liquiline CM44P - Page 146

Diagnostics and troubleshooting Liquiline CM44P
146 Endress+Hauser
No. Message Factory settings Sensor
type
Tests or remedial action
S
1)
D
2)
F
3)
122 Sensor glass F On Off P (glass) Impedance limit values exceeded/
undershot
Measuring can continue until the alarm
(122, 124) occurs.
1. Inspect sensor for hair-line cracks
and breakage.
2. Check or change limit values.
3. Replace sensor.
123 Sensor glass M On On P (glass)
124 Sensor glass M On Off P (glass)
125 Sensor glass F On Off P (glass)
126 Sensor check M On Off P (glass) Sensor condition check (SCC), poor
sensor condition
Glass membrane fouled or dry, junction
blocked
1. Clean sensor, regenerate
2. Replace sensor.
127 Sensor check M On Off P (glass) Sensor condition check (SCC), adequate
sensor condition
128 Sensor leakage F On Off P (ISFET),
O (amp.),
DI
Leak current alarm
Defective due to abrasion or damage
Damage to the gate (only ISFET)
‣
Replace sensor.
129 Sensor leakage F On Off P (ISFET),
O (amp.),
DI
Leak current warning
Measuring can continue until the alarm
occurs
130 Sensor supply F On Off P, O, I, DI Poor sensor power supply
1. Check sensor connection.
2. Replace sensor.
131 Sensor calibration M On Off O (opt.) Limit values for sensor relaxation time
(fluorescence decay time) exceeded/
undershot
Reasons: high oxygen content, incorrect
calibration
1. Repeat calibration.
2. Replace sensor cap.
3. Contact the Service Department.
132 Sensor calibration M On Off O (opt.)
133 Sensor signal F On Off O (opt.) No signal (fluorescence decay)
1. Replace sensor cap.
2. Contact the Service Department.
134 Sensor signal M On Off O (opt.) Low signal amplitude. Measurement can
still take place.
1. Replace sensor cap.
2. Contact the Service Department.
135 Sensor temp. low S On Off O Temperature outside specification
1. Check process.
2. Check installation.
136 Sensor temp. high S On Off O
137 Sensor LED F On Off O (opt.) Sensor LED: no voltage
‣
Contact the Service Department.
138 Sensor LED F On Off O (opt.) Sensor LED: no power
‣
Contact the Service Department.