Milkotester Master Series Operation Manual

Appendices towards the Operation Manual of Ultrasonic milk analyzer Master
Measurement of pH
General information
PH probe is a unit, measuring the solution acidity or alkalinity degree. It is measured on
scale of 0 to 14. The term pH is derived from "p", the mathematical symbol for the negative
logarithm, and "H", the chemical symbol of Hydrogen. The formal definition of pH is the
negative logarithm of the Hydrogen ion activity.
pH Electrode
For pH measurement the milk analyzer needs a combination electrode, compatible with
most pH electrodes that have BNC connectors and zero potential (the pH where the mill volt
output of the electrode equals 0) near 7 pH.
Electrode part
The electrode is the most important part of the pH measurement. The electrode glass
membrane is fragile and must be handled with care. To protect the glass membrane and to
maintain activation, a protective rubber cap containing a suitable storage solution covers the
glass membrane.
Electrode care & Electrode maintenance
pH Electrodes are susceptible to dirt and contamination and need to be clean regularly
depending on the extent and condition of use. At no time should one touch or rub the glass
bulb as this causes the build-up of electrostatic charge.