to hydrate the pH sensor.
4.2 Short press to turn on. Rinse in distilled water; shake the meter in the
air and use tissue paper to dap off excess water.
4.3 Long press to enter calibration mode; Short press to exit.
4.4 Insert the probe in the 7.00 pH calibration solution; Stir gently;
leave it to stand; Wait for the smiley face to appear and
stay on the screen (see Diagram 3); short press to complete
1
st
point calibration, tester returns to measurement mode;
calibration icon displays on button left side of the screen.
4.5 Rinse probe in distilled water. Long press to enter calibration
mode; insert the probe in the pH 4.00 calibration solution, stir gently; leave it
to stand; wait for the smiley face to appear and stay on the screen; then
short press to complete the 2
nd
point calibration,
tester returns to measuring mode, calibration icons display on
bottom left side of LCD.
■ Notes
a) Tester will automatically recognize pH buffer solution, users can choose
calibration points: 1 point, 2 points, or 3 points. But the 1st point calibration
must be in calibration solution of 7.00 pH, then followed by 2nd or 3rd point
calibration. For details, please refer to the following table:
Calibration
Indication icon
Recommended Accuracy
and Range
7.00 pH, 4.00 pH
and 10.01 pH
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