MemoTrans
45
No. Message
S
1)
D
2)
F
3)
Sensor type Configurable Tests or remedial action
734 Calibration quality
M
On
Off
All
No
Min. calibration quality warning.
Measurement can still take place. There is
a significant change in calibration quality
since the last calibration.
1. Repeat calibration.
2. Check sensor and replace if necessary.
740 Sensor defective
F
On
On
C
No
Internal electrode failure.
1. Replace sensor.
2. Contact the Service Department.
832 Temp. range
exceeded
S
Off
Off
All
Yes
Outside temperature specification.
1. Check application.
2. Check temperature sensor.
841 Operating range
S
Off
Off
All
Yes
Process value outside operational range.
1. Check application.
2. Check sensor.
842 Process value
S
Off
Off
P
Yes
Process limit value exceeded/undershot.
Reasons: sensor in air, air pockets in
fitting, incorrect flow to sensor, sensor
defective.
1. Change process value.
2. Check electrode system.
3. Change sensor type.
843 Process value
S
Off
Off
P
904 Process check alarm F
On
On
All
No
Stagnating measuring signal.
Reasons: sensor in air, sensor fouling,
incorrect flow to sensor, sensor defective.
1. Check electrode system.
2. Check sensor.
3. Restart the device.
910 Limit switches
S
On
Off
No
Limit switch activated.
914 USP / EP alarm
M
On
Off
C
Yes
USP limit values exceeded.
• Check process.
915 USP / EP warning
M
On
Off
C
942 Process value
S
Off
Off
P
No
Process value high.
1. Do not increase process value.
2. Check electrode system.
3. Change sensor type.
943 Process value
S
Off
Off
P
No
Process value low.
1. Do not decrease process value.
2. Check electrode system.
3. Change sensor type.
987 Calibration required M
On
On
I, DI
No
Electrode replacement.
• Calibrate sensor.
1)
Status signal factory setting
2)
Diagnostics message factory setting
3)
Fault current factory setting
