Hach-Lange 1200-S sc - Manual (Page 20)

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Operation
5.6.3 Calibration using a sample solution
1. Remove the sensor from the flow of product and clean it.
2. Place the sensor and the sample solution at the same temperature.
3. Hold the sensor in the sample solution for 10 minutes and accept to continue.
4. Wait until the measured value has stabilised and enter the pH value for the
sample solution. The value for the sample can be determined by a laboratory
analysis or a comparative indication.
5.6.4 Calibration using two sample solutions
The calibration is performed in exactly the same way for the calibration with one
sample solution. In addition, the controller prompts you to:
1. Clean the sensor and hold it in the second sample solution for 10 minutes.
2. Enter the pH value for the second sample solution.
5.7 Sensor calibration (REDOX)
Calibration using a sample solution is available for calibrating the sensor for
Redox.
1. Remove the sensor from the flow of product and clean it.
2. Place the sensor and the sample solution at the same temperature.
3. Hold the sensor in the sample solution for 10 minutes and accept to continue.
4. Wait until the measured value has stabilised and enter the value for the
sample solution. The value for the sample can be determined by a laboratory
analysis or a comparative indication.