Ph And Redox (Orp); Preparation Of The Ph / Redox Electrode; Calibration Of The Ph Electrode - Lovibond Tintometer SD 335 Multi Bedienungsanleitung

5 pH and redox (ORP)

5.1 Preparation of the pH / redox electrode

dry?

5.2 Calibration of the pH electrode

The electrode data of the pH electrode is subject to large fl uctuations due to ageing and
specimen scatter. A check of the last calibration with suitable buffer solutions should therefore
be carried out before any measurement. If there are deviations, recalibration is recommended.
Please observe the parameter settings before calibration and set the USB mode to mass storage
in the device confi guration. Proceed as follows:
(1)
(2)
2-PT
pH A pH B pH C
1-PT
3-PT
SD_335_1 06/2020
Remove the storage fl ask. Check the condition of the
electrode. If the sensor is dry, place the electrode in fresh
storage solution (3 M KCl) for at least 5 hours.
5 h
Check the sensor tip for air bubbles. If any are present,
they can be removed by gently shaking the sensor.
Select the pH parameter in operating mode. The calibration mode
can now be started by pressing and holding the F1 key.
Prepare the required number of calibration solutions. (1-5 point
calibration possible)
Set the calibration with the F2 key.
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