Bluelab pH Meter - Manual (Page 10)

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10
11.0 Troubleshooting guide
Trouble Reason Correction
pH reading inaccurate
Contaminated pH probe /
glassware not clean.
Clean pH probe (see section 6.0);
then calibrate.
Wick contaminated,
blocked or dry.
Hydrate probe in KCl storage
solution for 24 hours, see section
7.0. Do not measure proteins or
oils with this unit. Replace unit.
Incorrect pH calibration.
Ensure calibration solutions are
accurate. Replace if in doubt.
Wait longer for readings to
stabilize before calibrating to a
constant value.
pH calibration unreliable. Calibrate pH probe
(see section 3.0).
pH probe damaged or
old.
Replace pH probe.
pH reading does not
change from solution
to solution
Broken glass bulb,
tube or connector.
Check pH probe for damage.
Replace probe.
Displays low
battery indicator
Insuffi cient power to take
a reliable reading.
Replace the batteries.
DO NOT use rechargeable
batteries.
No display
Batteries dead or
inserted incorrectly.
Check batteries are inserted
correctly. Replace if necessary.
Display shows ‘Err’
Problem with pH
calibration.
See error message descriptions in
section 9.0 of this document.
Or
Ur
While in pH mode
Over range pH.
Under range pH. Solution > 14.0 pH.
Solution < 0.0 pH.
Check pH probe connection.
pH probe could be faulty.
pH meter could be wet inside.