Corrective action
Possible causes
Problem
Verify that the connectors are
clean and dry. The connector
may be cleaned with isopropyl
or methyl alcohol to assist with
the removal of water from be-
neath the contacts.
Note:
Do not immerse the plug ends in
liquid. Use an aerosol spray to
introduce the alcohol.
pH or conductivity connector
was wetted and did not dry
completely.
Measurement value is not as
expected.
Make sure the probe is calibrat-
ed prior to installation. Standard-
ize the probe if needed. See
tion 6.4.1 Calibrate the pH probe,
on page 176
for more informa-
tion.
The pH probe was not calibrated
prior to installation to XDUO
2500 Mixer.
See the manufacturer's docu-
mentation.
The conductivity probe offset
value should be changed.
1
Remove and re-attach the
sensor from the cable.
2
Carefully push the connector
together as it is being tight-
ened.
pH or conductivity connector is
not properly tightened or in-
stalled.
Replace the probe.
Probe may be at the end of its
life cycle.
Calibrate pH probes before use.
One of the pH probes is not cali-
brated.
Different probes in the same so-
lution show different pH read-
ings.
Replace the probe.
Probe may be at the end of its
life cycle.
272
Xcellerex XDUO 2500 Mixer Operating Instructions 29146667 AH
9 Troubleshooting
9.6 pH/Conductivity monitoring or control
