SATO 6433-00, Инструкция по эксплуатации, Страница: 13 / 16

11
Troubleshooting
Type of trouble Possible cause Solution
Some numeric pH
value is blinking The sample is lower than 1.00pH Use the unit within the measuring range
Unstable measured
values
The sample amount is not enough. Immerge the sensor into the sample 3cm deep
from the distal end of the sensor.
The sample may have low
conductivity such as pure water. For stable sensor measurement, the conductivity
of sample requires about 100µS/cm or larger
The temperature of the sample
may be changing. Stabilize the temperature of the sample.
Probable abnormal
measured values
The glass electrode may be dirty. Clean the glass electrode.
(Refer to the 'About the glass electrode' section)
The glass electrode may be dry.
The glass electrode is broken. Replace the sensor with a new one.
No calibration was performed. Perform a calibration.
The sample amount is not enough. Immerge the sensor into the sample 3cm deep
from the distal end of the sensor.
The measured sample temperature
and the temperature during
calibration is significantly different. Recalibrate the unit at close temperature to the
sample temperature.
If above measures do not improve the situation, glass electrode degradation or
damage is suspected. Please purchase a new one.
Calibration failure
The standard solution is used other
than pH 4, 7 or 10. Use the pH standard solution with pH 4, 7 or 10.
The standard solution is
deteriorated Clean the glass electrode.
(Refer to “About the glass electrode.”)
The glass electrode is dry Wash the glass electrode of the sensor probe.
(Refer to “About the glass electrode”)
If above measures do not improve the situation, glass electrode degradation or
damage is suspected. Please purchase a new one.