Troubleshooting
37
Section 5: Troubleshooting
Table 5-1: Troubleshooting
Trouble
Probable Cause
Remedy
Meter reads off scale. (Display
reads overrange.)
T.C. element shorted.
Check T.C. element as instructed in Section 4.2
and replace sensor if defective.
Sensor not in process or sample stream is low. Make sure sensor is in process with sufficient
sample stream (refer to Section 2.0 for
installation details).
Open glass electrode.
Replace sensor.
Reference element open - no contact.
Replace sensor.
Display reads between 3 and 6
pH regardless of actual pH of
solution or sample.
Electrode cracked.
Replace sensor.
Meter or display indication
swings or jumps widely in
AUTO T.C. Mode.
T.C. element shorted.
Check T.C. element as instructed in Section 4.2
and replace sensor if defective.
Span between buffers
extremely short in AUTO T.C.
Mode.
T.C. element open.
Check T.C. element as instructed in Section 4.2
and replace sensor if defective.
Sluggish or slow meter
indication for real changes in
pH level.
Electrode coated.
Clean sensor as instructed in Sections 4.1
Replace sensor if cracked.
Electrode at end of life.
Replace sensor.
Transmitter cannot be
standardized.
Electrode coated or cracked.
Clean sensor as instructed in Sections 4.1
Replace sensor if cracked.
Transmitter short spans
between two different buffer
values.
Electrode at end of life, due to old glass or high
temperature exposure.
Replace sensor.
Coated glass.
Clean sensor as instructed in Sections 4.1
Replace sensor if cracked.
Instruction Manual
Troubleshooting
LIQ-MAN-396-396VP-397-398-398VP
March 2017
Note:
For any repair or warranty inquiries please contact our Customer Care group.