PASCO SPARKvue ver.2.0 - Manual (Page 30)

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 Click the Standard Value box and enter the known
value.
For example, enter the known temperature of the water.
3. Under Calibration Point 1 Click Read From Sensor.
The value measured by the sensor is transferred to the Sensor Value box.
4. Click OK.
Calibration is complete.
Performing a 1-point slope-only calibration
In the Calibrate Sensor Enter Values screen,complete these steps:
1. Apply a known quantity to the sensor. For example, place a dissolved oxygen
probe in a bottle known to contain 9.1 mg/L of dissolved oxygen.
2. Under Calibration Point 2 Click the Standard Value box and enter the known
value.
For example, enter the known dissolved oxygen concentration.
3. Under Calibration Point 2 Click Read From Sensor.
The value measured by the sensor is transferred to the Sensor Value box.
4. Click OK.
Calibration is complete.
Calibrating a Drop Count sensor (example)
Tip: The Drop Dispenser has two stopcocks. The top stop cock is used to regulate flow
rate and the bottom stopcock is used to turn the flow on and off. The bottom stopcock
should either be in the completely open or completely closed position.
The drop counter is calibrated, using the SPARKvue Experiment Tools to correlate the
number of drops counted to the volume of liquid dispensed from the Drop Dispenser.
1. Attach the Drop Dispenser (syringe, two stopcocks and drop tip) to a support rod.
2. Fill the syringe with titrant.
3. Open both stopcock valves and adjust the valve on the top stopcock so that the
drops fall at a rate of about 1 drop per second. Close the bottom valve after the rate
is achieved.
4. Connect the Drop Counter and launch SPARKvue.
Document Number: 012-11074D 18
SPARKvue
®
3 Setting up an experiment
Calibrating sensors