Diagnostics and troubleshooting
Liquiline CM44P
146
Hauser
No.
Message
Factory settings
Sensor
type
Tests or remedial action
S
D
F
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.
