VIO 7 Vio, Инструкция по эксплуатации

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18
Rev. 1 20.12.2019
EN
During calibration press to exit and save the points calibrated up to that moment
(see calibration paragraph).
The instrument automatically recognizes 2 families of buffers (USA and NIST) also the user has the
possibility to perform a manual calibration up to 2 points with customizable values.
USA Buffers: 1,68 - 4,01 - 7,00** - 10,01 (Factory)
NIST Buffers: 1,68 - 4,00 - 6,86** - 9,18
**Neutral point always requested as first
In the measurement mode at the bottom left of the display, a series of
beakers indicates the buffers with which the last automatic and manual
calibration was carried out.
P1.2 Resolution
Access this menu to choose the resolution you want to have when
reading the pH parameter:

0.1

0.01 -default-
P1.3 Stability criteria in pH measurement
To consider the reading of a value truthful, we recommend to wait for a stable measurement, indicated by
the icon . When the measurement is not stable, four red bands appear flowing on the display .
Access this menu to change the measurement stability criteria.
“LOW”: choose this option to make the stability icon appear even in conditions of poor stability.
Readings included within 1.2 mV.
“MEDIUM” (default value): readings included within 0.6 mV.
“HIGH”: choose this option to display the stability icon only in conditions of high measurement stability,
readings within 0.3 mV.
P1.6 pH Calibration data
Access this menu to get information on the last calibration performed. The following screens will
automatically scroll on the display:

first screen: beakers indicating the buffers used;

second screen: OFFSET value of the electrode expressed in mV;

third and possibly fourth screen: Slope% in the measuring range (one Slope% only if two calibration
points are performed, two Slope% if three points are performed).
Note: The instrument only accepts calibrations with pH electrodes with Slope% between 80 - 120%.
Outside this range of acceptability, the instrument does not allow to complete the calibration and displays
the error message SLOPE OUT OF RANGE
Beaker Buffer value
Acid
< 6.5
Neutral
6.5 ~ 7.5
Basic
> 6.5