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If no further measurements are to be made, put the protective cap of
the electrode back onto the end of the probe to protect it from
contamination or damage.
Proceed as follows:
1.
Remove the protective cap from the electrode.
2.
Clean the electrode with distilled water and dry it well.
3.
Press “ON” to switch on.
4.
Immerse the electrode in the test solution and stir gently with
the electrode.
5.
Press "Temp / Cal" to toggle between ° C and ° F. Press and
hold "Temp / Cal" for 5 seconds to calibrate the electrode.
6.
Wash the electrode after use. Switch off and put on protective
cap.
4.2 Calibration of the pH meter.
For calibration, standard buffer solutions pH6.86, pH4.00 and pH
9.18 are required, which can be obtained from specialist dealers. The
measuring device can identify the standard buffer solution of pH 4.00
and pH 6.86 itself and automatically calibrates this value.
1.
Pour the standard buffer solution pH 6.86 and pH 4.00 (at
approx. 25 ° C) separately into three different clean beakers.
2.
Press "ON" to switch on the device.
3.
Immerse the electrode in a standard buffer solution pH 6.86 and
then stir gently until the value is stable. Press the "Temp / Cal"
button for 5 seconds. When the display value "686" corresponds
to the standard buffer solution, the calibration is finished.
4.
Clean the electrode.
5.
Immerse the electrode in a standard buffer solution pH 4.00 and
when the measuring value has stabilized, press "Temp / Cal" for
5 seconds.
6.
When the display shows "401", the meter changes to the
automatic pH4.01 calibration mode. When the display value
corresponds to the standard buffer solution, calibration is