In addition to "Special Use Keys," the links below provide step by step instructions for each of the listed processes:

Mode Settings

Calibrating a Sensor

Saving an Experiment

Special Use Keys

There are three keys on the top of the CBL unit that are visible when it is placed in the cradle with the calculator.

1. TRANSFER: Transfers the DataMate programs from the CBL 2 unit to the attached calculator. The CBL 2 unit identifies which version on the TI graphing calculator is attached and sends the appropriate program.

2. QUICK SET-UP: This button is used to collect data without a calculator attached to the CBL 2 unit and works only with auto-ID sensors.

3. START/STOP: Used with QUICK SET-UP to begin or end sampling.

Two of the keys on the TI-83 Plus calculator can be used for special functions when attached to the CBL 2 unit.

1. CLEAR: When pressed from the main screen or the set-up screen, it functions to restore the default settings in the DataMate program. For example, if you have changed the sensor set-up, pressing the CLEAR key will reset default settings.

2. STO>: When pressed during data collection, it will stop the current data collection and display the data.

Larger view of calculator screen with the location of the CLEAR key circled in white.
Larger view of calculator screen with the location of the STO key circled in white.


Mode Settings

If you do not want to use the default experiment, press 1 on the main screen which is "SETUP." Arrow down to the the "MODE" setting and then Press "ENTER." A list of the different types of modes will be displayed.


LOG DATA: Quick set-up procedure which allows you to use the CBL 2 to collect data without having a calculator attached. This is used in conjunction with the following two keys on the CBL 2:
    • QUICK SET-UP: This button is used to collect data without a calculator attached to the CBL 2 unit and works only with auto-ID sensors.
    • START/STOP: Used with QUICK SET-UP to begin or end sampling.
A message will be displayed which says: TO COLLECT DATA, QUIT THE PROGRAM, ATTACH AUTO ID SENSORS, PRESS THE QUICK SETUP BUTTON, THEN PRESS THE START/STOP BUTTON.

This can be used to collect data in the field or where calculators are available on a limited basis.

TIME GRAPH:This is the default mode and may be modified to suit your individual needs. Allows you to set the time intervals between sampling and the number of data points which may be taken. Advanced time settings can also be changed by pressing 3 which is "ADVANCED."

EVENTS WITH ENTRY: This setting collects a point each time you press "ENTER" and then asks the user to correlate that data point to a number.

SINGLE POINT: Collects a single point per second for a 10 second period of time and then displays a single averaged point at the conclusion of the 10 second period. This is useful when collecting data which is going through a continual change.

SELECTED EVENTS: Collects a single data point each time you click on the "ENTER" key on the calculator.

Calibrating a Sensor

When a sensor is chosen or auto detected by the software, a default calibration is loaded. It is not necessary to calibrate the sensors, but if you would like to calibrate a sensor manually, it is easy to accomplish.

1. After attaching the sensor to the appropriate channel on the CBL 2 unit, on the main screen, press 1 which is "SETUP."

2. Arrow down to the sensor you need to calibrate and press 2 which is "CALIBRATE." Not all sensors can be calibrated. If you choose one that cannot be calibrated, then the DataMate program will not respond to your request.

3. Your will be instructed on the steps necessary to continue. Consult the literature which comes with each sensor to determine the proper calibration technique to use.

Saving an Experiment

1. From the graph window, press "ENTER" to return to the main screen.

2. From the main screen menu, select 1 which is "SETUP."

3. Choose 4 which is "SAVE/LOAD."4. Choose 1 which is "SAVE THE EXPERIMENT." From this window you can also choose 2 which is "LOAD EXPERIMENT," 3 which is "DELETE EXPERIMENT" or 4 which is "DELETE ALL EXPERIMENTS."

5. You will then be prompted to "ENTER NAME."

6. Choose "2nd" then "ALPHA" to use the letter keys which are above the letter to type in a name for your experiment. The name can be up to 20 characters (a combination of letters and numbers) long.

7. Press "ENTER" and a "SAVING...." message will appear. Once the experiment is saved, you will be returned to the "EXPERIMENT MENU." Press 5 to return to the "SETUP MENU" and then 1 to return to the main screen.

Larger view of calculator screen with the location of the 2nd and ALPHA keys circled in white.

For instruction and resources related to the CBL, visit the following web sites:


©2000-2002 April A. Cleveland for Science Junction, NC State University.
All rights reserved.
URL: http://www.ncsu.edu/sciencejunction/route/usetech/cbl2/cbl2additionalinfo.html
Last updated 07/29/02

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