Parkside PPHM 14 A1 Bedienungs- Und Sicherheitshinweise Seite 70

Calibrate the product using the 9.18 pH buffer
solution: Repeat the full procedure of the
"pH calibration: 6.86 pH" section.
NOTES:
For best measuring results: Calibrate before each
measurement.
If the pH buffer solutions have air bubbles: Remove the
air bubbles prior to pH measurement.
70 GB/IE
Otherwise, the measured value may not be accurate.
The pH value slightly changes as the temperature of
the pH buffer solution changes:
°C 4.01 pH
10 4.00
15 4.00
20 4.00
25 4.00
6.86 pH 9.18 pH
6.92 9.33
6.90 9.28
6.88 9.23
6.86 9.18