33
CALIBRA
TION
5. Slowly place the sensors in the solution. Dislodge bubbles that may adhere to the sensors.
6. Use the arrow keys to select “Conductivity” and press
Select
to start the calibration.
7. If necessary, press
Cal. point
to select the correct standard. To use a custom standard, press
Custom
. A text box window will appear. Use the keypad to enter the value of the standard
(100 to 200000 µS/cm) at the current temperature. Press
Accept
to confirm the standard value.
8. Once the reading has stabilized, the stability timer will count down until the display shows the
“Ready“ message.
9. Press
Confirm
to save the calibration. The message “Storing” followed by “Calibration
completed” will be displayed.
10. Press
OK
to return to the calibration menu or
Measure
to return to the measurement screen.
Absolute Conductivity (EC) Calibration Procedure
1. Remove the shield from the probe. Rinse the probe with purified water.
2. Fill the calibration beaker 2/3 full with conductivity standard solution with known concentration.
3. Immerse the sensors in solution. Raise and lower the probe several times. Discard this solution.
4. Fill the calibration beaker 2/3 full with conductivity standard solution with known concentration.
5. Slowly place the sensors in the solution. Dislodge bubbles that may adhere to the sensors.
6. Wait a few minutes for the measurement to stabilize. Use the arrow keys to select “Absolute
Conductivity” and press
Select
to start the calibration. A text box window will appear. Use the
keypad to enter the value of the standard at the current temperature. Press
Accept
to confirm
the standard value.
7. The stability timer will count down until the display shows the “Ready” message.
8. Note the temperature and adjust the conductivity value if needed.
9. Press
Confirm
to save the calibration. The message “Storing” followed by “Calibration
completed” messages will be displayed.
10. Press
OK
to return to the calibration menu or
Measure
to return to the measurement screen.
