Vernier Data Pro - Manual (Page 27)

Data Pro 25
Calibration of Sensors
When a sensor is selected, Data Pro automatically loads the standard calibration settings. Further
calibration is usually not needed.
If you choose to calibrate a sensor, tap
on the Setup screen.
There are two ways to calibrate a sensor. The first is to perform a new calibration; the second is
to manually enter the calibration values. The examples shown below are for the pH sensor.
To perform a new calibration for a pH sensor, you will need two solutions with known pH
values: for example, solutions with values of 4 and 10. Follow these steps:
1. On the Setup screen, tap .
If you have more than one sensor connected, then tap the button below
Calibration, and choose which sensor you want to calibrate.
2. The current calibration will be displayed. Tap .
Note: Not all sensors can be calibrated (e.g., Stainless Steel Temperature Probe). If you select a
sensor that cannot be calibrated, Data Pro does not respond when you tap
.
3.
Put the pH Sensor in the pH-4 solution. Wait until the voltage number on
the screen stabilizes, enter 4 under Value, and then tap
.
4. Rinse and put the pH Sensor into the pH-10 solution, entering 10 instead
of 4, since you are using the pH 10 buffer. After the reading stabilizes, tap
.
5. Tap to return to the Setup screen.