Vernier Data Pro User Manual

Page 13

Data Pro

LabPro Tutorial 3: Events with Entry and Boyle’s Law

The Events with Entry mode collects reading from a sensor each time you tap

and

then asks you to enter a corresponding value for that sensor reading (e.g., a volume or a
concentration)

This tutorial will guide you through the setup procedure of an experiment

using Events with Entry and investigate the relationship between the pressure and volume of
a gas.

MATERIALS

Palm handheld

20-mL gas syringe

LabPro interface

Data Pro program

Vernier Gas Pressure Sensor

PROCEDURE

1. Prepare the Gas Pressure Sensor and an air sample for data collection.

Plug the Gas Pressure Sensor into Channel 1 of the LabPro. Use the interface cable to
connect the Palm to the LabPro. Firmly press in the cable ends.

With the 20-mL syringe disconnected from the Gas Pressure Sensor, move the piston
of the syringe until the front edge of the inside black ring (indicated by the arrow in
the figure shown above) is positioned at the 10.0 mL mark.

Attach the 20-mL syringe to the valve of the Gas Pressure Sensor. The Vernier Gas
Pressure Sensors have a white stem protruding from the end of the sensor box—
attach the syringe directly to the white stem with a gentle half-turn.

2. Turn on the Palm and start the Data Pro program. If you are on the Main

screen, tap

to clear any sensors and default settings. (Or, if you are

not on the Main screen, tap Data Pro at the top of screen, and choose New
from the pull-down menu.) Notice how the program automatically
identified the Gas Pressure Sensor (an auto-ID sensor). It displays the
channel it is connected to and the current reading, in units of kPa. Note: If
you are not using an auto-ID sensor, you will need to set it up manually.
See Tutorial 2 for directions on doing this.

3. Set up the Palm OS device and interface for a Gas Pressure Sensor.

On the Main screen, a live pressure reading should be displayed for
the Gas Pressure Sensor in

CH1

(in units of kPa).

Tap

On the setup screen (see right), tap the Mode button, and then choose
Events with Entry mode.