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CALIBRATION
10. Press Confirm to save the calibration. The message “Storing” followed by “Calibration
completed” will be displayed.
11. Press OK to return to the calibration menu or Measure to return to the measurement screen.
To Calibrate Offset
1. Remove the shield from the probe. Rinse the probe with purified water.
2. Shake all water from the probe.
3. Use a tissue to dry off the EC sensor. There should be no moisture in or on the sensor.
4. Suspend the probe in the air (infinite resistance).
5. Press Start to initiate the calibration.
6. Press Cal point and Use the arrow keys to choose 0uS/cm. Press Select.
7. Once the reading has stabilized, the stability timer will count down until the display shows the
“Ready“ message.
8. Press Confirm. Calibration Complete will be displayed.
9. Press OK to return to the calibration menu
Absolute Conductivity (EC) Calibration
1. Remove the shield from the probe. Rinse the probe with purified water.
2. Fill the calibration beaker 2/3 full with the test solution with known concentration.
3. Immerse the sensors in the solution. Raise and lower the probe several times then discard this
solution.
4. Fill the calibration beaker 2/3 full with the test solution with known concentration.
5. Slowly place the sensors in the solution. Dislodge bubbles that may adhere to the sensors.
6. Screw the calibration beaker completely onto the probe body. Some solution may overflow.
7. Wait a few minutes for the measurement to stabilize. Use the arrow keys to select “Absolute
Conductivity” and press Start to start the calibration. 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.
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