Hanna Instruments HI 2002, Инструкция по эксплуатации

Страница: 27 / 52

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The custom buffers allow the user to calibrate in a buffer solution different from a standard one. Two
custom buffers can be set in SETUP menu. See page 28 for more information about using custom
buffers.
The instrument will automatically skip custom buffers which are in a ±0.2 pH window of an already
calibrated buffer.
Submerse the pH electrode approximately 3 cm (1¼”) into a buffer solution and stir gently. Press
CAL/MODIFY key to enter calibration.
The “CAL” tag will appear and the “7.01” buffer will be displayed on
the third LCD line. If necessary, press the
keys to select a
different buffer value. The “ ” along with “STIR” tag will be displayed
and “WAIT” will blink on the LCD until the reading is stable.
When the reading is stable and close to the selected buffer, “CFM” tag
will blink. Press
GLP/CFM key to confirm calibration.
After confirming the first point, the calibrated value will be displayed
on the first LCD line and the second expected buffer value on the third
LCD line (i.e. pH 4.01).
Rinse and submerse the pH electrode approximately 3 cm (1¼”) into the second buffer solution and
stir gently. If necessary, press the
keys to select a different buffer value.
The “ ” along with “STIR” tag will be displayed and “WAIT” will blink on the LCD until the reading
is stable.
OPERA
TIONAL GUIDE