How to Calibrate the Hanna HALO Wireless pH Meter

For consistent and accurate measurements with your Hanna HALO pH meter, it is essential to perform regular pH calibration. This how-to guide explains the correct calibration method for this excellent device.

Figure 1 Watch an Instrument Choice scientist demonstrate how to calibrate the Hanna HALO series of Wireless pH Meter here.

Materials

• The Hanna HALO Wireless Soil pH Meter
• One of the following compatible devices:
  • Android Device. The HALO is compatible with most devices equipped with Bluetooth Smart Technology (Bluetooth 4.0) and running Android 4.3 or later.
  • Apple iOS. The HALO is compatible with iPad (3rd generation or newer), iPhone (4S or newer), iPod Touch (5th generation or newer).
  • HI2202 Edge Blu Meter
• Deionised Water
• pH buffer solution (For this example, we use 01 and pH4.01).

How To Connect The Hanna HALO Wireless Soil Ph Meter To The Hanna Lab App.

1. Download Hanna Lab App. Available for Android and Apple
2. Open the app and agree to any required permissions.
3. The app opens on the device connection page. To connect a new device, press the small Bluetooth icon in the top right corner. The app will begin to search for nearby devices.
4. On the probe: Press the operation button located on the top. The blue LED HALO will begin to flash in half-second intervals, indicating it’s in discovery mode.
5. The probe ID will appear in the list of probes on the second half of the app screen.
6. When your probe appears, press “Connect” next to the device name. If you have multiple devices, you can confirm the device serial number against the name listed on the app. The serial number is located on the neck of the probe.
7. Wait a moment, and the device will connect and automatically begin wirelessly sending pH and temperature information to the application.

pH Automatic Buffer Selection

1. If you have not already, you will need to confirm or check the automatically recognised buffers. Press the settings icon on the top right of the app.
2. Scroll down to “Calibration Buffers”.
3. Choose between HANNA (1.68, 4.01, 7.01, 10.01, 12.45) and NIST (1.68, 4.01, 6.86, 9.18, 12.45) buffer sets. As we are using pH 4.01 and pH7.01, we will select the HANNA buffer set.
4. Press OK to confirm your selection.
5. Hit the back button on your phone to return to the measurement mode.

pH Calibration

1. Place the probe into the pH 7.01 buffer solution.
2. Navigate to the settings menu by pressing the settings icon on the top right of the app.
3. Select “Calibration”.
4. The screen will display “Calibration Probe” up the top to indicate it is in calibration mode, and the calibration instructions will be at the bottom of the app.
5. Wait as the meter automatically recognises the pH 7.01 solution.
6. Once recognised, press “Confirm” to confirm that the solution identified solution is correct.
7. Wait - The pH meter will calibrate to the value of 7.01.
8. Once complete, the notification down the bottom says “Save Calibration”. Press Save.
9. After a moment, the app will have a pop-up notification saying “User calibration completed”. Calibration to pH 7.01 is complete.
10. Rinse the electrode in deionised water and gently shake dry.
11. Place the electrode into the pH4.01 buffer solution.
12. Again, navigate to the settings menu by pressing the settings icon on the top right of the app.
13. Select “Calibration”
14. Wait for the device to recognise the standard solution automatically.
15. Once recognised, the app will say “Calibrating to pH 4.01”. Press “Confirm” to confirm that the solution identified solution is correct.
16. After confirming, the device will calibrate to the established value. Then press “Save” to save the calibration point.
17. After a moment, the device will return to measurement mode, and a notification will appear saying “User Calibration Completed.”
18. Rinse the electrode in deionised water.
19. From this point, you can perform additional points of calibration (up to 5 points), repeating the steps mentioned. Otherwise, the meter is ready to take accurate, wireless pH measurements!

Conclusion

pH meters require regular calibration to ensure accurate measurements. Calibration of the Hanna Wireless pH meter could not be more straightforward - place the relevant electrode into any of the pre-selected standards and follow the instructions given in the app! 

For more information on Hanna Instrument’s series of HALO pH meters, see the links below or contact us!

Additional links

• View the Hanna Hanna HALO Wireless Soil pH Meter here
• Browse other wireless Hanna HALO pH meters;
  • HALO Wireless Beer pH Meter
  • Halo Pvdf Body Ph Electrode With Bluetooth
  • Halo Ph Electrode With Clogging Prevention System
  • Halo Pei Body Gel-Filled Ph Electrode With Bluetooth
  • Halo Glass, Gel Filled pH Electrode With Bluetooth
  • Halo Bluetooth Glass Refillable pH Electrode
• Edge Blu Bluetooth Smart pH Electrode And Meter
• Hanna Lab App for Android
• Hanna Lab App for Apple devices
• Browse all Hanna Instruments available at Instrument Choice here
• Watch “How to Calibrate the HALO Wireless Soil pH Meter (IC-HI12922)” again
• Learn “How to Set Up the HALO Wireless Soil pH Meter (IC-HI12922)” here
• Browse pH Buffer solutions
• Purchase deionised water for rinsing pH electrodes