Calibration With Manual Values - Dostmann pH 7 Vio Manuel D'utilisation

At the end of the third calibration point, the instrument returns automatically to measure mode.
•
To perform a one- or two-point calibration, press the key
•
point.
Note: electrode calibration is an essential operation for the quality and truthfulness of a
measurement. Therefore, make sure that the buffers used are new, unpolluted and
at the same temperature
ATTENTION: Before proceeding with the calibration operations, carefully consult the safety data
sheets of the substances involved:
Calibration buffer solutions.
•
• STORAGE solution for pH electrodes.
• Filling solution for pH electrodes.

• Calibration with manual values

Example two- point calibration pH 6.79 e pH 4.65 (DIN19267).
:
• Access the Setup menu for pH and select in P1.1 Custom, press twice the key
measurement and position in pH mode
Press to enter the calibration mode.
•
Rinse the electrode with distilled water and gently dab it with paper towel. Dip the electrode in the
•
first pH buffer solution (e.g. pH 6.79).
• Wait for the pH value on the display to stabilize; when the icon
modify it using the directional keys by entering the correct one (e.g. 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
measured value flashes on the display and the beaker icon appears with the buffer identification
colour .
• Remove the electrode, rinse with distilled water, dab it gently with paper towel and dip it in the next
buffer (e.g. pH 4.65).
• Wait for the pH value on the display to stabilize; when the icon
flashes, modify it using the directional keys by entering the correct one (e.g. pH 4.65), as suggested
by the string "ADJUST THE VALUE" and by the icon
• When the icon
measured value flashes on the display, the Slope% and, next to the first beaker, the icon with the
identifying colour of the second buffer
At the end of the second calibration point, the instrument automatically returns to measure mode.
•
• To perform a one-point calibration just press the key
Note: If you are working with manual temperature compensation (MTC), update the value before
calibrating the instrument.
Series 7 Vio ENG Version 2.0 April 2020
.
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appears again, press the key
appears again, press the key
appears.
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once finished the first or second
appears and the value flashes,
to confirm the first point; the actual
appears and the actual value
.
to confirm the second point; the actual
after finishing the first point.
to return to the
EN