PASCO PS-2108 Dissolved Oxygen Sensor - Manual (Page 19)

Model No. PS-2108 Dissolved Oxygen Sensor
15 ®
Experiment 1: Introduction to the Operation of the
Dissolved O
2
Sensor
Purpose
The purpose of the experiment is to explore the basic operation of the Dissolved Oxygen
Sensor: how to set it up, how to calibrate it, and how to obtain the most accurate
measurements with it.
Materials and Equipment Needed
• Dissolved Oxygen Sensor (PS-2108)
• 600 ml beaker
• PASCO ScienceWorkshop
• 400 ml deionized water saturated with air
• PASPort Interface and DataStudio software
• Reference tables for dissolved oxygen
• aquarium pump (optional)
Optional Equipment Suggested
To saturate deionized water with air, fill a clean container one-third full with deionized water,
seal it, and shake vigorously for 10 seconds. Alternatively, bubble air through the deionized
water for 15 minutes using an aquarium pump.
Procedure
1. Set up and calibrate the Dissolved Oxygen Sensor in DataStudio
according to the calibration procedure detailed in this manual.
2. Place the probe in the test solution and stir it gently for thirty
seconds.
3. Click the Start button on the DataStudio toolbar to begin recording
data (Data Run #1).
4. Being careful to keep the stainless steel band submerged to at least
1 cm under the surface of the water, gently stir the probe in the test
solution until the dissolved O
2
readings stabilize.
5. Click the Stop button on the DataStudio toolbar to end data
recording.
Figure 1
Gently stir the probe in the
test solution