Texas Instruments CBL 2, Руководство по началу работы

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64 G
ETTING
S
TARTED WITH THE
CBL 2™ S
YSTEM
© 2000, 2003 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
Analysis
1.
Sketch the graph on question 9 on the Student Data Reporting Sheet and answer
question 10.
2.
To determine the rate at which the battery voltage dropped, we need to
perform a regression on our data. Before we do that, we want to select data
from the first part of the graph, usually about 2 hours (7200 seconds), where the
voltage drop appears linear.
From the graph screen, press Í to return to the Main Screen.
3.
Press  GRAPH to go to the graph, and press Í to go to the Graph Options
screen.
4.
Press
Á
SELECT REGION and follow the instructions on the screen to select the
linear part of the graph.
5.
Press
Í
to see the new graph.
6.
From the Graph Menu screen, press À to return to the
Main Screen, and press ¶ ANALYZE to go to the Analyze
Options menu.
7.
Press
Á
CURVE FIT.
8.
Press
À
LINEAR (CH1 VS TIME) to perform a linear regression on our voltage
data. The calculator displays the linear equation and the corresponding values.
Enter this information on question 11 of your Student Data Reporting Sheet.
9.
Answer questions 12-16.