07
PHscan20
Cal
Enter
PHscan
POCKET PH TESTER
allows up to 3 points calibration.
tester can
—
—
—
Press CAL key the tester shows “pH7.00/CAL1”(or “pH6.86/CAL1”).
4. Dip the
pH electrode into the
pH7.00
(or
pH6.86)
standard
buffer
solution,
the end
of
the electrode must be completely immersed into
the
calibration
solution. Stir the tester gently.
5. Press
ENTER
key
to confirm. W
pH Calibration
During pH mode, the tester
We recommend
that you perform
at
least 2
points calibration for high accuracy
measurement.
The
Single point calibration should only be carried out with pH 7.00 or pH 6.86,
otherwise calibration will not be accepted.
automatically recognise and calibrate to following standard
buffer values.
USA Standard:
pH4.01, 7.00, 10.01
NIST Standard: pH4.01, 6.86, 9.18
The
tester
must be calibrated prior to first use or new electrode replaced. To
ensure
accuracy,
regular
calibration
is
recommended.
Do
not
reuse
calibration
solution
after
calibration,
contaminants
in
solution
will
affect
the
calibration
and
eventually the accuracy of the measurement.
Single Point Calibration
1. Make sure that you have selected 1 point calibration in the system menu.
2. Rinse the pH
electrode
with distilled water, press MEAS
key
to
turn
on
the
tester.
3.
,
ait for the measured value to stabilize, the
display shows “END”. Single point calibration is done.
PHscan20
08
Enter
Enter
2 Points Calibration
Make sure that you have selected
2 points calibration in the system menu.
Repeat
steps
2
to
5
above.
When
the
first
calibration
point
is
completed
,
the
display will show
“CAL2”. The tester prompts you to continue with second
point calibration.
Rinse
the
electrode
with
distilled
water,
ait for the measured value to stabilize, the
display shows electrode slope and “END”. Second point calibration is done.
3 Points Calibration
Make sure that you have selected
3 points calibration in the system menu.
Repeat
steps
2
to
5
above.
When
the
first
calibration
point
is
completed
,
the
display will show
“pH4.01/CAL2”.
The tester prompts you to continue with
second point calibration.
Rinse
the
electrode
with
distilled
water,
ait for the measured value to stabilize, the
display shows electrode slope and “pH10.01/CAL3” (or “pH9.18/CAL3”).
—
—
—
dip the electrode into the pH4.01
or 10.01
(pH4.01 or 9.18) standard buffer solution.
—
Press
ENTER
key
to
confirm.
W
—
—
—
dip the electrode into the pH4.01
standard buffer solution.
—
Press
ENTER
key
to
confirm.
W
