Instruction Manual

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after it’s dipped into the test solution and then let it stand still. Wait for the stable

measurement (a smiley face appears and stays) and then record the readings. When test is

finished, place the electrode in the storage bottle and tighten the cap in order to keep the

sensitivity of the pH sensor.

5.3 Calibration:

5.3.1. Switch in power, press < > key to turn on.

5.3.2. Short press < MODE > key to switch to mode.

5.3.3. Insert the pH electrode (remove the storage cap) into the meter’s socket.

5.3.4. Press < CAL > to enter calibration mode, LCD flashes indicating to make

the 1

point calibration.

5.3.5. Rinse pH electrode in distilled water, allow it to dry and submerge it in pH7.00 buffer

solution. Stir the solution briefly and allow it to stay in the buffer solution until reading is

stable and icon appears and stays, then press < CAL >, LCD flashes 7.00 pH,

calibration finishes after several seconds and then flashes, indicating the 1

point

calibration has been finished and the 2

point calibration begins.

5.3.6. Take out the pH electrode, rinse it in distilled water, allow it to dry and submerge it in

pH4.00 buffer solution. Stir the solution briefly and allow it to stay in the buffer solution until

reading is stable and

icon appears and stays, then press < CAL >, LCD flashes

4.00pH, calibration finishes after several seconds and then flashes, indicating the

point calibration has been finished and the 3rd point calibration begins.

5.3.7. Take out the pH electrode, rinse it in distilled water, allow

it to dry and submerge it in pH 10.01 buffer solution. Stir the

solution briefly and allow it to stay in the buffer solution until

reading is stable and icon appears and stays, then press

< CAL >, LCD flashes 10.01pH,calibration finishes while

displaying a stable pH and temperature value.

icon appears on the screen,

indicating 3 points calibration has been finished. See picture (4-1).

5.3.8. Notes

(a) The meter can perform 1 point, 2 points and 3 points of automatic calibration. When the 1

point calibration finished, press < ENTER > key to confirm and enter measuring mode.

OFF