Vernier DataMate Guidebook - Manual (Page 14)

12 DataMate Guidebook
5. A list of modes will appear in the SELECT MODE screen. Press the
number preceding EVENTS WITH ENTRY . You will be returned to the
Setup screen. Then select OK to return to the setup screen.
6. Select OK to return to the Main screen.
You are now ready to collect pressure and volume data. It is best for one
person to take care of the gas syringe and for another to operate the
calculator.
7.
Select START. Notice that a graph is not initially displayed; instead, it is
going to wait for you to collect at least two data points.
8. Move the piston so the front edge of the inside black ring (indicated by the
arrow) is positioned at the 5.0-mL line on the syringe.
Hold the piston firmly in this position until the pressure value displayed
on the calculator screen stabilizes (in this example, the number to the
right, 194.32 kPa). The number to the left indicates the sample number.
9.
Press
ENTER
, which tells DataMate to record the pressure. Type in “5”, the
gas volume (in mL) on the calculator. Press
ENTER
to store this pressure-
volume data pair.
To collect another data pair, move the syringe to 7.5 mL. When the
pressure reading stabilizes, press
ENTER
and enter “7.5” as the volume.
Repeat the above procedure for volumes of 10.0, 12.5, 15.0, 17.5, and 20.0
mL.
As you work your way through the experiment, you get to view the data
being collected (see the picture on the right). Notice the sample number
(5), the value given (68.9 kPa) and the graph in progress.
10. When you are done, press
STO
to end data collection.
11.
Move the cursor right or left (using the arrow keys) to examine the data
pairs on the displayed graph.
12. Press
ENTER
to return to the Main menu, then select QUIT to quit the
program.