Bluelab Soil pH Meter User Manual download pdf (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.

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