- 5 -
Batt ery Replacement
Please install batteries according to the following steps.
*
Please note the correct direction of battery installation:
The Positive Side
(“+”) OF EVERY SINGLE Battery MUST
FACE UP.
(WRONG INSTALLATION OF BATTERIES WILL CAUSE DAMAGE TO THE TESTER AND POTENTIAL HAZARDS!)
Preparation bef ore Use
5.1
Pull out the battery insulation slip, and take off the probe cap.
5.2
Rinse off the probe in pure water (preferably distilled or deionized water. RO water
or tap water is the alternative) , then shake off excess water (see graph on the right).
5.3
Perform at least a 2-point calibration. For pH calibration tutorial, refer to
Section 6.
5.4
When you are not using the tester, always store the spear probe in the
3M KCL soaking solution. Never let it dry out. Replace the soaking solution if it gets contaminated.
pH Calibrat ion
6.1
Short press to power on the meter; rinse the probe in pure water. Shake off excess water.
6.2
Pour pH 7.00 and pH 4.00 buffer solution in the corresponding calibration vials (to about half volume of the vials).
6.3
Long press to enter calibration mode (screen turns green);
