Automatic Ph Calibration - XS Instruments 70 Serie Manuel D'utilisation

Outside this range of acceptability, the instrument does not allow to end the calibration and
displays the error message
P1.7 pH calibration deadline
Access this menu to set a calibration deadline; this option is very important in GLP protocols.
 By default, no calibration deadline is set. Use the directional keys to select HOURS or DAYS and access
with button . Use the directional keys to change the number that appears in the center of the
display, entering the hours or days that must elapse between two settings, and confirm with
 If a calibration deadline is set, the icon
 When the calibration deadline is activated, the instrument prevents further measurements.
The error icon and the icon representing the calibration deadline
The string "MAKE A NEW CAL" invites the user to perform a new calibration of the pH sensor to be able to
work again.
Press the key to start the calibration.
P1.8 Reset of the pH parameter
If the instrument does not work properly or incorrect calibrations have been carried out, confirm YES with
the button to take all the parameters of the pH menu back to the default settings.
IMPORTANT: The factory reset of the parameters DOES NOT erase the stored data.
P1.9 Temperature calibration
All the instruments of this series are pre-calibrated for a correct temperature reading. However, if there is a
difference between the measured and the real temperature (usually due to a probe malfunction), it is
possible to perform an offset adjustment of + 5°C.
Use the keys and
 Automatic pH calibration
Example: three-point calibration with USA type buffers (7.00 / 4.01 / 10.01)
In pH measure mode

The string "1ST POINT PH 7.00" appears on the display; the device requires the neutral value as the
first calibration point.
 Rinse the electrode with distilled water and gently dab with paper towel. Dip the electrode in the pH
7.00 buffer solution.
 When the signal is stable, the red bands are replaced by the stability
icon .
Press the key

The measured value flashes on the display and then the icon of the pH
7.00 beaker appears at the bottom left, indicating that the instrument is calibrated on the neutral
point.
 Remove the electrode, rinse with distilled water and dab gently with absorbent paper. Dip the sensor
in the pH 4.01 buffer solution ("CHANGE BUFFER").
UM Serie 70Vio EN rev. 1 04.06.2020
SLOPE OUT OF RANGE.
is present on the display in measure mode.
to correct the temperature offset value and confirm with
press the key to enter calibration mode.
as indicated by the string "PRESS OK".
17
flash on the display.
.
EN
.