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Chapter 23: Activities 399
23ACTS.DOC TI-89/TI-92 Plus: Activities (English) Susan Gullord Revised: 02/23/01 1:24 PM Printed: 02/23/01 2:20 PM Page 399 of 26
Program Instruction Description
:cooltemp()
:Prgm
:Local i
:setMode("Graph","FUNCTION")
:PlotsOff
:FnOff
:ClrDraw
:ClrGraph
:ClrIO
:-10!xmin:99!xmax:10!xscl
:-20!ymin:100!ymax:10!yscl
:{0}!data
:{0}!time
:Send{1,0}
:Send{1,2,1}
:Disp "Press ENTER to start"
:Disp "graphingTemperature."
:Pause
:PtText "TEMP(C)",2,99
:PtText "T(S)",80,-5
:Send{3,1,-1,0}
:
:For i,1,99
:Get data[i]
:PtOn i,data[i]
:EndFor
:seq(i,i,1,99,1)!time
:NewPlot 1,1,time,data,,,,4
:DispG
:PtText "TEMP(C)",2,99
:PtText "T(S)",80,-5
:EndPrgm
Program name
Declare local variable; exists only at run time.
Set up the
TI
-
89 / TI
-
92 Plus
for function graphing.
Turn off any previous plots.
Turn off any previous functions.
Clear any items previously drawn on graph screens.
Clear any previous graphs.
Clear the
TI
-
89 / TI
-
92 Plus
Program IO (input/output) screen.
Set up the Window variables.
Create and/or clear a list named
data
.
Create and/or clear a list named
time
.
Send a command to clear the CBL 2/CBL unit.
Set up Chan. 2 of the CBL 2/CBL to AutoID to record temp.
Prompt the user to press
¸
.
Wait until the user is ready to start.
Label the y axis of the graph.
Label the x axis of the graph.
Send the
Trigger
command to the CBL 2/CBL; collect data in
real-time.
Repeat next two instructions for 99 temperature readings.
Get a temperature from the CBL 2/CBL and store it in a list.
Plot the temperature data on a graph.
Create a list to represent
time
or
data
sample number.
Plot
time
and
data
using
NewPlot
and the
Trace
tool.
Display the graph.
Re-label the axes.
Stop the program.
You can also use the Calculator-Based Ranger™ (CBR™) to explore the mathematical and
scientific relationships between distance, velocity, acceleration, and time using data collected
from activities you perform.
CBL 2/CBL Program for the TI-89 / TI-92 Plus
This activity provides a program that can be used when the TI
-
89 / TI
-
92 Plus is connected
to a Calculator-Based Laboratory
é
(CBL 2
é
/CBL™) unit. This program works with the
“Newton’s Law of Cooling” experiment, and is similar to the “Coffee To Go” experiment in
the
CBL System Experiment Workbook
. You can use your computer keyboard to type
lengthy text and then use TI-GRAPH LINK to send it to the TI
-
89 / TI
-
92 Plus.
More TI
-
89 / TI
-
92 Plus CBL 2/CBL programs are available from the TI web site at:
education.ti.com/cbl