VIO 7 Vio, Инструкция по эксплуатации

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20
Rev. 1 20.12.2019
EN
Switching from an acidic to a basic pH may take a few more seconds to achieve stability.
The actual measured value and the second Slope% flash on the display; subsequently the icon of the
beaker pH 10.01 appears next to the green and red beakers, indicating that the instrument is
calibrated in the basic field.

At the end of the third calibration point, the instrument automatically returns to measuring mode.

To perform a one- or two-point calibration, press the key once you have finished the first or
second point.
Note: Electrode calibration is an important operation to obtain a trustable value of pH during measurement.
Therefore, make sure that the buffers used are new, unpolluted and at similar temperature.
ATTENTION: Before proceeding with the calibration operations, carefully consult the safety data sheets
of the substances involved:

Buffer solutions for calibration

STORAGE solution for electrode maintenance

Refill electrode solution

Manual calibration
Example
:
two- point calibration pH 6.79 e pH 4.65 (DIN19267)

Access the Setup menu for pH and select in P1.1

Customer, press twice to return to the
measurement and position in pH mode .

Press to enter the calibration mode.

Rinse the electrode with distilled water and gently dab with absorbent paper.
Immerse the electrode in the first pH buffer solution (ex pH 6.79).

Wait for the pH value on the display to stabilize; when the icon appears and the value flashes, edit
it using the directional keys by entering the correct one (ex pH 6.79), as suggested by the string “ADJUST
THE VALUE” and by the icon .
Note: Check the buffer value according to the temperature

When the icon reappears, press to confirm the first point; the value measured actually flashes on
the display and the beaker icon appears with the buffer identification color .
..

Remove the electrode, rinse with distilled water, dab gently with absorbent paper and dip it in the next
pad (ex pH 4.65).

Wait for the pH value on the display to stabilize; when the icon appears and the value flashes,
modify it using the directional keys by entering the correct one (ex pH 4.65), as suggested by the string
“ADJUST THE VALUE” and by the icon .

When the icon reappears, press to confirm the second point; the value measured flashes
on the display, the Slope% and the icon appears next to the first beaker identifier of the second buffer