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Vernier CBL Made Easy User Manual

Page 18

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Step 4

Collect Data

CBL Made Easy!

14

4. Turn on the CBL unit and the calculator. Follow these steps to start the

CHEMBIO, PHYSICS, or

PHYSCI

program on your calculator:

TI-73, 82 or 83 Calculators:

Press

PRGM

, then press the calculator key for the number that precedes

CHEMBIO,

PHYSICS, or

PHYSCI

program (usually

1

). Press

ENTER

, then press

ENTER

again to go to the

MAIN MENU

.

TI-83 Plus Calculators

Press

APPS

, then press the calculator key

for the number that precedes

CHEMBIO,

PHYSICS, or

PHYSCI

program. Press

ENTER

, then press

ENTER

again to go to the

MAIN MENU

.

TI-85 or 86 Calculators:


Press

PRGM

, press

F1

to select <

NAMES

>, and press a menu key to select

< CHEMB >,

<

PHYSIC >,

or

< PHYSCI >

(usually

F1

). Press

ENTER

, then press

ENTER

again to go to the

MAIN MENU

.

TI-89, 92 or 92 Plus Calculators:


Press

2nd

[

VAR-LINK

]. Use the cursor pad to scroll down to “chembio,” “physics,” or “physci”

then press

ENTER

. Press

)

to complete the open parenthesis that follows “chembio,” “physics,”

or “physci” on the entry line and press

ENTER

. Press

ENTER

again to go to the

MAIN MENU

.


5. Set up the calculator and CBL for one temperature probe and a temperature calibration.

Select

SET UP PROBES

from the

MAIN MENU

.

Select “1” as the number of probes.

Select

TEMPERATURE

5

from the

SELECT PROBE

menu.

Enter “1” as the channel number (in the

PHYSICS

program, press

ENTER

).

Select

USE STORED

from the

CALIBRATION

menu (this menu will appear only if you are using the

Vernier Direct-Connect Temperature Probe or Standard Temperature Probe).


6. Set up the calculator and CBL for data collection.

Select

COLLECT DATA

from the

MAIN MENU

.

Select

TIME GRAPH

from the

DATA COLLECTION

menu.

Enter “4” as the time between samples, in seconds.

Enter “25” as the number of samples (the CBL will collect data for a total of 100 seconds).

Press

ENTER

, then select

USE TIME SETUP

to continue. Note: If you want to change the sample

time or sample number you entered, select

MODIFY SETUP

. Then choose, on the TI-85, “

LIVE =

LIVE DISPLAY

.”

Enter “0” as the minimum temperature (Ymin).

Enter “80” as the maximum temperature (Ymax).

Enter “10” as the temperature increment (Yscl). Do not press

ENTER

to begin data collection until

Step 8.


7. Get about 150 ml of hot water in a second 250-ml beaker.

Note: In Step 9, you will switch the temperature probe from the cold water to the hot water at exactly
20 seconds after you have begun data collection. This will be done as the fifth data point appears on
the calculator screen (5

X

4 seconds = 20 seconds).


8. When everything is ready, press

ENTER

on the calculator to begin data collection. Do not stir or move

the water.

5

If you are using a Standard Temperature Probe (with a box in the cable), select 1:VERNR STD TEMP.