Instruction Manual

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5.5.6. Time setting (P5)

(a) Short press <MODE> key in mode P4 to enter into mode P5, see picture (4-6)

(b) Press < UNIT > key, the number will move rightward and flash，press < ▲ > or < ▼ >

key to alter the number.

conform and return to measuring mode.

5.5.7. Restore to factory setting (P6)

(a) Short press <MODE> key in mode P5 to enter into mode P6, see picture (4-7)

(b) Press <▲> key to choose “On”, indicating parameter setting has been restored

to the factory setting state. It will then return to measuring mode after 2s.

5.6 Notes

1) After immerging the pH combination electrode into the solution, please stir the solution

briefly in order to remove air bubbles and obtain a faster response and stable measurement

value.

2) If a temperature electrode is not present, users can press < ▲ > or < ▼ > key to

perform manual temperature compensation.

3) There is a protection bottle surrounding the tip of the pH electrode. This contains the KCL

soaking solution. The tip of the electrode should be immerged in the solution to keep the

glass bulb junction’s activation. Unscrew the cap, pull out the electrode and rinse it in distilled

water before measuring. Once done testing, put in the electrode in the soaking bottle and

screw the cap tightly to prevent solution leakage. If the soaking solution is turbid or moldy,

please replace the solution and clean the probe immediately.

4) Users should prevent the electrode from being soaked into distilled water, protein solution

and acid fluoride solution and from contacting with organic solutions.

5) In order to improve the accuracy, the pH value of the buffer solution should be known and