Error messages and trouble shooting
41
How to check for instrument defect
Short the metal part of the outer tube to the center pin of the electrode
connector of the corresponding channel of the instrument. If Ur or Or
appears in this condition, consult your dealer.
Repeatability of the measured value is poor.
Nothing appears when the power is turned ON
Swelling of keypad
Part of the display is missing
Cause
How to solve problem
Effect of the sample solution.
Repeatability becomes poor when the pH of the sample
changes over time.
The electrode is dirty.
Clean the electrode.
The electrode is broken.
Replace the electrode.
The internal solution of the
electrode is partially depleted or
contaminated.
Replace the electrode.
Cause
How to solve problem
Power is not supplied.
Insert batteries.
Battery polarity (+, ) is reversed.
Insert the batteries with the polarity (+, ) correctly
oriented.
Battery life is low.
Replace the batteries.
Instrument defect.
Consult your dealer.
Cause
How to solve problem
Using the instrument at high
elevation or other location where
the air pressure is different from
sea level.
To eliminate the pressure difference between the inside
and outside of the instrument, briefly open and then close
the serial connector and battery cover. After opening,
correctly close the cover to maintain dust and water
proofing.
Instrument defect
Consult your dealer.
Cause
How to solve problem
Instrument defect.
Check the display by switching ON the instrument when all
the LCD segments are lit.
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