Use; Before Taking A Measurement - Parkside PPHM 14 A1 Operation And Safety Notes

The product clears the calibrated data from its
memory. The display enters into pH measuring mode.
pH 7 is shown in the display. Calibrate the product
again (see "Calibration").
˜ Use
˜ Before taking a measurement
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.
Otherwise, the measured value may not be accurate.
After taking any measurement: Clean the electrode
probe 1 and the test liquid absorption rod 1a (see
"Cleaning the electrode probe and the test liquid
absorption rod").
GB 33