Checklist For Faults In The Measurement Of The Ph Or Rx Values; Errors In Ph - swim-tec CL2 Deluxe WiFi Salz 1,6 l/h Bedienungsanleitung

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Checklist for faults in the measurement of the pH or Rx values*

6.1 Errors in pH

Determine the values for pH and chlorine content in the pool using a manual
measurement (by taking a sample using the skimmer) and compare this value with the
display on the dosing system.
[?] My manual measurement for pH deviates considerably from the display.
Check the pH – sensor (see calibration instructions in the operating instructions)
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[?] After calibration, the following error message appears: [Displays: Error
zero point, error slope or calibration error]
Possible causes:
Sensor defective

Incorrect buffer solutions used

 Buffer solutions too old (more than 1 year)
Use a new sensor or buffer solution
Other potential causes:
 Defective connection between the sensor and board, e.g. defective measuring
cable of sensor or connector for sensor/device (SN6 or BNC)
 Defective measuring cable from connection to board or electronics
Short circuit Fixed display around value pH 7, since 0 mV = pH 7
Broken cable Open channel, i.e. display fluctuates or shows "- -"
The measuring duct can be checked with a simulator (special accessory).
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[?] Calibration was successful. Nevertheless, the value still deviates
considerably from the manual measurement.
In this case, a water sample (close to skimmer) must be taken. Then dip the pH sensor
in the buffers for pH 4, pH 7 and the water sample.
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