- 10 -
the LCD will show a blinking
7.00 pH
, indicating the 1
st
point of calibration is completed;
a stable pH value and a blinking
C2
will be displayed, indicating the first point calibration
has been finished and the meterenters the second point of calibration.
5.2.3. Rinse the pH electrode in distilled water and dry it, then soak it into the pH4.00 buffer
solution, stir the electrode gently and let it stand still,, waiting for a stable reading and a
smiley face icon
to appear and stay, then again press
, the LCD will show a blinking
4.00 pH
, a stable pH value and a blinking
C3
will be displayed, indicating the second-
point calibration has been finished and the meter enters the third-point calibration.
5.2.4. Rinse the pH electrode in distilled water and dry it, then soak
it into the pH 10.01 buffer solution, stir the electrode gently
and let it stand still,, waiting for a stable reading and a smiley
face icon
to appear and stay, then again press
, the
LCD will show a blinking
10.01 pH.
A stable reading and
L M H
calibration icons will be
displayed, see picture (4-1), indicating the three-point calibration has been finished and the
meter automatically returns to measuring mode.
5.2.5.
Notes
(a) This meter can perform one-point, two-point or three-point automatic calibrations. After the
first point calibration (see item 5.2.2.), press
to confirm one-point calibration and
return to measuring mode. The indication icon
M
standing for one-point calibration will
appear on the lower left corner of LCD. When the requirement of accuracy is ≤±0.1pH,
users can perform a one-point calibration with the pH7.00 buffer solution.
(b) After the second-point calibration, (see item 5.2.3.), press
to confirm two-point
calibration and return to measuring mode. The indication icon
L and M
for twp-point
calibration will appear on the lower left corner of LCD. User can choose pH4.00 and pH7.00
to calibrate if the measurement is within the acidity range and choose pH7.00 and pH10.01
to calibrate if within the alkalinity range.
