Texas Instruments CBR 2 manual Case of difficulty, If you have this problem Try this

In case of difficulty

If you have this problem:

Try this:

Difficulty collecting data		Check for a poor calculator-to-CBR 2™ motion detector connection. Always push
		in firmly on both ends of the cable.
		Check for low batteries (see page 40).
The CBR 2™ motion detector		If you set down the CBR 2™ motion detector with the ¤ button face down,
begins collecting data by itself		the ¤ button may depress and activate sampling. Press ¤ again to
		stop sampling.
		Before storing the CBR 2™ motion detector, properly exit the EasyData App (using
		Quit) or any other CBR 2™ motion detector or CBL 2™ system App.
The CBR 2™ motion detector		Press ¤ to stop sampling. Repeat sample. If problem continues, remove
doesn’t quit collecting data		one battery and put it back in. Note: Any data stored in the CBR 2™ motion
		detector will be lost.
Communication Error		Attach the CBR 2™ motion detector to the calculator with the Standard-B to Mini-
		A USB cable (unit-to-CBR 2™).
		Check for a poor calculator-to-CBR 2™ motion detector connection. Always push
		in firmly on both ends of the cable.
		If you do not want to (or cannot) attach the CBR ™ motion detector to the
		calculator, quit the EasyData App.
Insufficient memory		You must have sufficient memory for the EasyData App and the data lists.
		EasyData needs 5000 bytes to run effectively. You need to delete items from the
		calculator memory.
		On the TI calculator, press yL2:Mem Mgmt./Del. Choose items to delete
		and press DEL to delete the selected items.
Calculator doesn’t match activity		This guide applies to all the TI calculators that can load the EasyData App. You
instructions		may find that some of the menu names, screens, or keys in this guide do not
		match exactly those on your calculator. If using Ranger, or other programs, choose
		the closest match. For example, if the instructions say “Choose DISTANCE MATCH,”
		on the TI-83 you would choose DIST MATCH.
Data doesn’t look right:		Repeat the sample, ensuring that the CBR 2™ motion detector is aimed directly at
0 points not on the curve		the object.
		Read pages 6–9 on getting good data samples.
0	jagged plots
		Check that the clear zone does not contain students, tables, or other objects.
0	flat plots
		Check the position of the Sensitivity switch.
0	broken plot
		When using two CBR 2™ units at the same time in the same room, one group
		should complete a sample before the next group begins their sample.
		Check for a poor calculator-to-CBR 2™ motion detector connection. Always push
		in firmly on both ends of the cable.
		Check for low batteries (see page 40).
Lost unit-to-CBR 2™ cable		You can use the I/O unit-to-unit cable that came with the calculator. (The unit-to-
		CBR 2™ cable allows auto-launching of EasyData and a more reliable connection,
		so you may wish to order a replacement cable.)
Frequently low batteries		Before storing the CBR 2™ motion detector, properly exit the EasyData App (using
		Quit) or any other CBR 2™ motion detector or CBL 2™ program, and disconnect
		the CBR 2™ motion detector from the calculator.

© 1997, 2004, 2006 TEXAS INSTRUMENTS INCORPORATED GETTING STARTED WITH THE CBR 2™ SONIC MOTION DETECTOR 41