Bluelab Soil pH Meter - Manual (Page 12)

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12
13.0 Troubleshooting guide
Trouble Reason Correction
pH reading inaccurate
Contaminated soil pH
probe / glassware not
clean.
Clean soil pH probe (see section
8.0); then calibrate.
Wick contaminated,
blocked or dry.
Hydrate probe in KCl storage
solution for 24 hours, see section
9.0. 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 soil pH probe
(see section 3.0).
soil pH probe damaged
or old.
Replace soil pH probe.
pH reading does not
change from solution
to solution
Broken glass bulb,
tube or connector.
Check soil 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 11.0 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.