Ph Calibration - Hanna Instruments HI 8510 Instruction Manual

pH CALIBRATION

Make sure that the instrument
is in measurement mode
(MEASURE LED is on) before
proceeding with calibration.
Measure the temperature of
the calibration buffer with a
ChecktempC or another
accurate thermometer.
Remove the protective cap
from the electrode, rinse and
immerse in pH 7.01 solution
(HI 7007).
Note: The electrode should be
submerged at least 4
cm (1½") into the solu-
tion. The thermometer
should be located as
close as possible to the
pH electrode.
Shake briefly and wait one minute before
adjusting the Δ0 trimmer to display the buffer
solution value, i.e. "pH 7.01" at 25°C (77°F).
DOSAGE
SLOPE
ACID BASE
ΔO
MEA
SET
SURE
COARSE
SET
FINE
If the buffer solution temperature is different
from 25°C (77°F), refer to the "pH vs.
temperaturare" chart on page 36 for the ap-
propriate pH value at the noted temperature.
34
MEA
SURE
COARSE
SET
FINE
HI 7007
HI 7004
pH
34£
Rinse pH electrode and thermometer probe
thoroughly with water, then immerse them in
pH4.01 (HI 7004) or pH 10.01 (HI 7010) buffer
solution.
Note: For accurate readings, use pH 4.01 if
you are going to measure acid samples
or pH 10.01 for alkaline measurements.
Shake briefly and wait one minute before
adjusting the slope trimmer to display the ph
value of the buffer solution, i.e. pH 4.01 (or
10.01) at 25°C (77°F).
DOSAGE
SLOPE
ACID BASE
ΔO
MEA
SET
SURE
COARSE
SET
FINE
If the buffer solution temperature is different
from 25°C (77°F), refer to the "pH vs.
temperaturare" chart on page 36 for the ap-
propriate pH value at the noted temperature.
The calibration is now complete and the in-
strument is ready for use.
Note: If a Pt100 temperature sensor is used,
immerse it into the buffer solutions
during calibration.
35
pH