29
Rev. 1 20.12.2019
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
Manual Conductivity calibration
Example: Calibration at 5.00 µS/cm using a K=0.1 cell constant
Access the Setup menu for COND SETTINGS and select in the P3.1 0.1 and into the program P3.2
Custom, then 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 absorbent paper.
Start with a few ml of standard solution and immerse 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 yet
stable.
Wait for the Conductivity value on the display to stabilize; when the icon appears, use the keys
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.
The icon appears, which indicates that the instrument is calibrated in the low Conductivity range.
Automatically the device returns to measurement 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 respect to parameter P3.1 (cell constant) and P3.2 (type
of calibration solutions) selected.
Note: if you are not aware of the exact compensation coefficient, to obtain a calibration and an accurate
measurement set in P3.4
0.00 %/°C and then work by bringing the solutions exactly to the reference
temperature
Another method for working without temperature compensation is to use the appropriate thermal tables
To Next Page
Loading...