horiba d-51, Инструкция по эксплуатации

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4 Maintenance and Troubleshooting
4.2 Troubleshooting
66 HORIBA
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The measured value is blinking
The pH value exceeds the measurement range (when
pH value is displayed).
Measurement range: pH 0.00 – pH 14.00
Check this point
As shown in the diagram, use a jumper wire or bent
paper clip to short the meter by touching both the center
pin and some metal part in the electrode connector.
If the flaching measured value disappears when this
done, the meter is nomal.
Cause How to solve problem
The sample
solution is
inappropriate. Change to a sample solution with
properties within the measurement
range.
The liquid
junction is not
immersed in the
sample solution. Immerse the electrode in the
sample solution all the way until the
liquid junction or deeper.
The electrode
cable has been
severed. Replace the electrode.
The main body
of the pH meter
is defective. Check the point described below.
The meter has
not been
calibrated or it
has been
calibrated
incorrectly. Calibrate the meter correctly.