User Manual

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(a) Check the electrode bulb and see if there are any air bubbles. If any are present, flick

the electrode with your wrist until the bubbles have been removed. Be sure to have a firm

grip when doing so.

(b) Check the pH buffer solution and see if it goes bad or has a bigger error.

If the sensor doesn’t work after the above checks, please replace the pH electrode.

4 mV and ORP Measurement

4.1 Sample Test

5.1.1. Press < > to turn on the meter, press < MODE > to switch to , then

press < UNIT > key to choose or ;

(a) — This is the electrode potential measuring mode. mV value and the

temperature will be showed at the same time;

(b) — This is the ORP electrode measuring mode. ORP measurement has no

temperature compensation, so there is no temperature appears in this mode;

Note: — ORP is the abbreviation of “Oxidation-Reduction Potential”, representing the

Oxidation-Reduction Potential of the solution, ORP is the measuring parameter for the

oxidation reduction potential of the aqueous solution. Use mV as its unit.

5.1.2. Connect ORP electrode or ion electrode, immerge it into the sample solution, stir

briefly and then set it still. When icon appears, the reading is the ORP value or the

potential value of the ion electrode.

4.2 Notes

5.2.1. ORP measurement does not require calibration. When the user is not sure about ORP

electrode quality or measuring value, use ORP standard solution to test mV value and see

whether ORP electrode or meter works properly.

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