PASCO CI-6729 (1X) CONDUCTIVITY SENSOR - Manual (Page 13)

9
012–06485B Conductivity Sensor
Experiment 1: Introduction to the Operation of the
Conductivity Sensor
Purpose
The purpose of this experiment is to learn the basic operation of the Conductivity Sensor.
Materials and Equipment Needed
• Conductivity Sensor • 150 ml distilled or deionized H
2
O
• Science Workshop version 2.2.5 or higher • 150 ml tap H
2
O
• PASCO computer interface • 150 ml mineral H
2
O
• computer • 150 ml bottled drinking H
2
O
• 250 ml beaker (5) • wash bottle of distilled or deionized H
2
O
• Conductivity Sensor manual
Procedure
1. Soak the Conductivity Electrode in distilled or deionized H
2
O for 5–10 minutes.
2. Set up the Conductivity Sensor according to the procedure detailed in the Conductivity
Sensor manual (select Digits display only). Select the 200 scale on the amplifier box.
➤ Note: Calibration is not needed for this experiment.
3. Make sure all water samples are at room temperature. Define a labeling scheme to identify
the water samples.
4. Insert the Conductivity Electrode into the first 150 ml water sample. Wait until the display
stabilizes, and record the conductivity value below.
5. Remove the electrode and rinse it with the wash bottle.
6. Repeat steps 4 and 5 with the remaining samples. Note that you might need to switch to the
2k scale for one or more of samples.
κ(distilled or deionized H
2
O) =__________ µS/cm
κ(tap H
2
O) =___________ µS/cm
κ(bottled H
2
O) = __________ µS/cm
κ(mineral H
2
O) =__________ µS/cm
Data Analysis