Manual Cond Calibration - Dostmann pH 7 Vio Manuel D'utilisation

For each cell constant (P3.1), the instrument stores the calibration, to allow the user who uses
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multiple sensors with different constants not to be forced to recalibrate each time.
The instrument recalls the last calibration with respect to the selected parameters P3.1 (cell constant)
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and P3.2 (type of calibration solutions).
Important: Standard conductivity solutions are more vulnerable to contamination, dilution and direct
influence of CO2 than pH buffers, which, on the other hand, thanks to their buffer capacity, tend to be
more resistant. In addition, a slight change in temperature, if not adequately compensated, can have
significant effects on accuracy.
Therefore, pay attention in the calibration process of the Conductivity cell in order to obtain
accurate measurements.
Important: Always rinse the cell with distilled water before calibration and when switching
from one standard solution to another to avoid contamination.
Replace standard solutions frequently, especially low Conductivity ones.
Contaminated or expired solutions can affect the accuracy and precision of the measurement.
ATTENTION: Before proceeding with the calibration operations, carefully consult the safety data
sheets of the substances involved:
Calibration buffer solutions.
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• Manual COND calibration

Example: calibration at 5.00 µS / cm with sensor with Cell Constant 0.1.
• Access the Setup menu for COND SETTINGS and select in the P3.1  0.1 and in P3.2  Custom,
go back to the measurement and go into COND mode
• Press the key to enter the calibration mode.
• Rinse the cell with distilled water and dab gently with paper towel.
Apply few ml of standard solution and dip the sensor in the conductivity standard 5.00 µS/cm.
• The string "WAIT FOR STABILITY" and the flowing red bands indicate that the measurement is not
stable yet.
• Wait for the Conductivity value on the display to stabilize; when the icon
and to adjust the value by entering that of the standard solution (ex: 5.00 µS/cm), as
indicated by the string "ADJUST THE VALUE" and by the icon
• When the icon reappears confirm the calibration point by pressing the key
The actual measured value flashes on the display and the updated cell constant is then shown.
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• The icon appears, which indicates that the instrument is calibrated in the low conductivity
range.
Automatically, the device returns to measure mode.
For each cell constant (P3.1) the instrument stores the calibration in order to allow the user, who
•
uses multiple sensors with different constants not to be forced to recalibrate each time.
The instrument recalls the last calibration with the respect to the selected parameters P3.1 (cell
constant) and P3.2 (type of calibration solutions).
Series 7 Vio ENG Version 2.0 April 2020
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appears, use the keys
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EN