PASCO SPARK Science Learning System Ver. 1.4.0 User's Guide - Manual (Page 22)

3 Setting up an experiment
Calibrating sensors
calibration is appropriate for your sensor.
6. Touch NEXT.
The Calibrate Sensor: Enter Values screen opens.
Now that you have selected a measurement, you can perform a calibration as described in the
next task.
Performing a calibration
After you have selected a measurement to be calibrated and a calibration type (see previous
task), you are ready to perform a calibration.
Depending on the calibration type that you have selected, perform a 2-point calibration, a 1-
point offset-only calibration, or a 1-point slope-only calibration.
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Performing a 2-point calibration
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Performing a 1-point offset-only calibration
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Performing a 1-point slope-only calibration
Performing a 2-point calibration
In the Calibrate Sensor: Enter Values screen, complete these steps:
1. Apply a known quantity to the sensor.
For example, place a pH probe in a pH 4 buffer solution.
2. Under Calibration Point 1 touch the Standard Value: box and enter the known value.
For example, enter the known pH of the buffer solution.
3. Under Calibration Point 1 touch Read From Sensor.
The value measured by the sensor is transferred to the Sensor Value: box.
4. Apply a different known quantity to the sensor. For example, place the pH probe in a
pH 7 buffer solution.
5. Under Calibration Point 2 touch the Standard Value: box and enter the known value.
For example, enter the known pH of the buffer solution.
6. Under Calibration Point 2 touch Read From Sensor.
The value measured by the sensor is transferred to the Sensor Value: box.
7. Touch OK.
Calibration is complete.
Performing a 1-point offset-only calibration
In the Calibrate Sensor: Enter Values screen, complete these steps:
1. Apply a known quantity to the sensor.
For example, place a temperature probe in ice water known to be 0 °C.
2. Under Calibration Point 1 touch the Standard Value: box and enter the known value.
For example, enter the known temperature of the water.
3. Under Calibration Point 1 touch Read From Sensor.
The value measured by the sensor is transferred to the Sensor Value: box.
4. Touch OK.
Calibration is complete.
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