Texas Instruments PLUS TI-89 - Manual (Page 416)

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