C
OPYING PERMITTED PROVIDED
TI
COPYRIGHT NOTICE IS INCLUDED
8
G
ETTING
S
TARTED WITH
CBR
© 1997 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
Hints for effective data collection
(cont.)
RANGER settings
Sample times
TIME
is the total time in seconds to complete all sampling. Enter an integer between 1
second (for fast moving objects) and 99 seconds (for slow moving objects). For
REALTIME=YES
,
TIME
is always 15 seconds.
When
TIME
is a lower number, the object must be closer to the
CBR
. For example, when
TIME=1 SECOND
, the object can be no more than 1.75 meters (5.5 feet) from the
CBR
.
Starting and stopping
The
SETUP
screen in the
RANGER
program provides several options for starting and stopping
sampling.
0
BEGIN ON: [ENTER]
. Starts sampling with the calculator’s
›
key when the person
initiating the sampling is closest to the calculator.
0
BEGIN ON: [TRIGGER]
. Starts and stops sampling with the
CBR
¤
button when the
person initiating the sampling is closest to the
CBR
.
In this option, you also can choose to detach the
CBR
. This lets you set up the sample,
disconnect the cord from the
CBR
, take the
CBR
where the action is, press
¤
,
sample, reattach the
CBR
, and press
›
to transfer the data. Use
BEGIN ON: [TRIGGER]
when the cord is not long enough or would interfere with data collection. This is not
available in
REALTIME=YES
mode (such as the
MATCH
application).
0
BEGIN ON: DELAY
. Starts sampling after a 10-second delay from the time you press
›
.
It is especially useful when only one person is doing an activity.
Trigger button
The effect of
¤
varies depending on the settings.
0
¤
starts sampling, even if
BEGIN ON: [ENTER]
or
BEGIN ON: DELAY
is selected. It also
stops sampling, but usually you will want to let a sample complete.
0
In
REALTIME=NO
, after sampling has stopped,
¤
automatically repeats the most
recent sample, but does not transfer the data to the calculator. To transfer this data, from
the
MAIN MENU
choose
TOOLS
, and then choose
GET CBR DATA
. (You also can repeat a
sample by choosing
REPEAT SAMPLE
from the
PLOT MENU
or
START NOW
from the
SETUP
screen.)