Horiba Scientific 6560S-10C Instruction Manual page 63

Check item
Is the temperature of
the solution being
stirred rising?
Is measurement
being performed
while air bubbles are
on the ion selective
membrane?
Is a solution at a
temperature outside
the measurement
temperature range
being measured?
Is the electrode
dirty?
Solution
A gradual rise in solution
temperature due to the magnetic
stirrer generating heat may cause
an apparent potential drift.
Reduce the influence of the
temperature changes by covering
the magnetic stirrer with heat
insulation such as polystyrene
foam or using a thermostatic bath.
( "Measurement hints" (page
31))
Shake the electrode to remove
any air bubbles remaining on the
ion selective membrane.
If air bubbles remain on the ion
selective membrane, it may result
in inaccurate measurement.
( Note on page 35)
Adjust the temperature of the
solution so that it is within the
measurement temperature range
before measurement. If not, it
may cause measurement errors
as well as damages or
deterioration to the electrode.
( "Specifications" (page 70))
Rinse the electrode. A dirty
electrode will cause measurement
errors or a decrease in the
response rate during calibration.
( "Rinsing the electrode"
(page 15))
( "How to polish the
electrode" (page 42))
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