Calibrate a conductivity sensor

Improve the accuracy of a conductivity sensor, such as the Wireless Conductivity Sensor (PS-3210A), by calibrating the conductivity measurement.

Before you start

Calibrating a conductivity sensor will require the following components:

• Two beakers
• Two standard solutions of known conductivity
• De-ionized water

Calibration

1. Connect the sensor to SPARKvue.
2. Create a Graph display with Conductivity as one of the measured properties.

3. From the Live Data Bar in the bottom left of the Experiment Screen, select the Conductivity measurement and select Calibrate measurement from the list of options.

   

4. Adjust the settings to the following options, as shown in the image below. Once you have done so, select Continue.

   • Sensor: {The name of the sensor being calibrated}
   • Measurement: Conductivity (µS/cm)
   • Calibration Type: 2 point (Adjust Slope and Offset)

   

5. Insert the probe of the conductivity sensor into a beaker containing your first standard solution, making sure the tip is fully immersed. Wait for the Sensor Value reading under Calibration Point 1 to stabilize before proceeding.

6. Under Calibration Point 1, enter the known conductivity of the first standard solution into the Standard Value box, then select Set Calibration.
7. Remove the conductivity probe from the first beaker and rinse the probe with de-ionized water.
8. Insert the probe into another beaker containing the second standard solution, making sure the tip is fully immersed. Wait for the Sensor Value reading under Calibration Point 2 to stabilize before proceeding.

9. Under Calibration Point 2, enter the known conductivity of the second standard solution into the Standard Value box, then select Set Calibration.

   

10. Review your new calibration to make sure it is appropriate, then select OK.