Lutron Electronics PH-222, Руководство пользователя

Страница: 7 / 10

pH 4 Calibration
1) Rinse the electrode in distilled water to remove remnants of pH 7.00 buffer solution.
2) If the instrument isn’t already on, turn it on by pressing the “POWER” Button (3 -2,
Front Panel Description).
3) Press the “HOLD” Button (3 -3, Front Panel Description) once and then press the .
button (3-4, Front Panel Description) once. The display will then show the following
sequence:
4) Press the again and the display will show:
5) Remove the electrode from your distilled water and place it into the pH 4.00 Buffer
solution (PH-
04A) that came supplied. Press the “HOLD” button once. The display
will s how “4.00” flashing, followed by “END”. It will then return to the standard
measurement screen and this concludes the pH 4.00 calibration process as shown
below.
Calibration Clear Function
If for some reason, the calibration procedure is executed in the incorrect way, the meter
offers the ability to clear the meter of calibration data.
1) Power on the instrument by pressing the “POWER” button (3 -2, Front Panel
Description).
2) Press the “HOLD” button (3-3, Front Panel Description) once and the display will show
the “HOLD” Symbol. Press the button (3-4, Front Panel Description) once and the
display will show the following sequence: