horiba U-51, Инструкция по эксплуатации

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4 Maintenance
95
Last span calibration
invalid
pH sensor
1. The pH standard solution is contaminated.
2. The pH-responsive membrane is dirty.
3. The concentration of the reference
electrode's internal solution has changed.
4. The pH-responsive membrane is torn.
pH sensor
1. Replace the standard solution with new
solution.
2. Clean the pH-responsive membrane.
3. Refill the reference electrode's internal
solution.
4. Replace the sensor.
ORP sensor
1. The ORP standard solution is
contaminated.
2. The ORP electrode is dirty.
3. The concentration of the reference
electrode's internal solution has changed.
4. The ORP sensor glass is broken. ORP sensor
1. Replace the standard solution with new
solution.
2. Clean the ORP electrode.
3. Refill the reference electrode's internal
solution.
4. Replace the sensor.
COND sensor
1. The calibration solution is not correct.
2. The sensor is dirty.
3. The COND sensor has failed.
COND sensor
1. Use the correct calibration solution for
calibration.
2. Clean the sensor.
3. Contact your nearest sales outlet.
TURB sensor
1. There are air bubbles on the cell.
2. The cell window is dirty.
3. The sensor is being affected by ambient
light.
4. The solution is dirty.
5. The TURB sensor has failed.
TURB sensor
1. Shake the sensor probe vigorously.
2. Clean the cell window.
3. Calibrate using the calibration cup provided.
4. Replace the solution with new solution.
5. Replace the TURB sensor.
DO sensor
1. The diaphragm is torn.
2. There are air bubbles in the internal
solution.
3. The DO sensor has failed.
DO sensor
1. Replace the diaphragm with a new one, and fill
the DO sensor with new internal solution.
2. Replace the diaphragm with a new one, and fill
the DO sensor with new internal solution.
3. Replace the DO sensor.
Temperature sensor

The temperature sensor has failed.
Temperature sensor

Contact your nearest sales outlet.
Out of measurement
range
[See above.] [See above.]
Last zero-point
calibration invalid
Last span calibration
invalid
The calibration value of an individual
parameter is not stable.
1. The sensor is dirty.
2. The sensor has not adjusted to the
standard solution.
3. The temperature was unstable during
calibration.
1. Clean the sensors.
2. Fill the transparent calibration cup with pH 4
standard solution, and wait for at least 20 minutes
of conditioning before starting calibration.
3. Start calibration after the temperature has
stabilized.
Out of measurement
range
[See above.] [See above.]
Last zero-point
calibration invalid
Calibration value is
factory default value.
Internal IC failure
Turn the power OFF, then restart the system. If
the error persists, initialize the system from the
"System" menu. If the error still persists, contact
your nearest sales outlet to have the sensor
probe repaired.
Error Cause Solution