Texas Instruments TI-73 Explorer Appendix page 2

Using
TI GRAPHING DEVICE
Main Screen
The main screen of DataMate is divided into
two parts. The top half of the screen shows
the current sensor setup and data collection
mode. The bottom half displays the menu
options.
The CBL 2™ or the Vernier LabPro will
automatically identify auto-ID sensors, dis-
play the channel each is connected to, and
display the current reading. Only active
channels will be displayed. The screen will
update as auto-ID sensors are added and
removed from the interface. Some sensors
will not have auto-ID and need to be manu-
ally set up.
The main screen supports a "meter
mode" displaying readings for active
sensors every few seconds.
SETUP
If you want to change the current setup,
choose SETUP from the main screen. From
here you can change sensors, change the
data-collection mode, and calibrate or zero
a sensor.
Sensors
To change a sensor or add a sensor that is
not auto-ID, use the # key to position the
cursor opposite the desired channel. Press
b and a list of sensors will be dis-
played. Select the appropriate sensor or
choose MORE for the next list of sensors.
Data-Collection Modes
To change modes, move the cursor to
MODE and press b.
TIME GRAPH is the default data collection
mode. The sensor you are using will set its
own sample interval and length of run.
These settings can be changed by choosing
CHANGE TIME SETTINGS from the TIME
GRAPH SETTINGS screen.
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This feature is not available on the TI-73 Explorer
and DataMate
A TIME GRAPH will be displayed live
unless you are sampling at a rate faster
than 10 samples per second or slower than
one sample every 270 seconds. If you are
using multiple sensors and they are identi-
cal, all of the data will be displayed live on
one graph. If they are not identical, only one
channel can be displayed live.
LOG DATA – Data can be collected using
the interface without being attached to the
graphing device using the LOG DATA mode.
DataMate can then retrieve the data from
the interface.
EVENTS WITH ENTRY – Data are
collected one point at a time and only when
the b button on the graphing device is
pressed. The graphing device will then
prompt you to enter the corresponding
value, such as volume, concentration, or
trial. This mode is used for titrations, Boyle's
law, etc.
SINGLE POINT – One averaged data point
is displayed. The interface will collect data
for 10 seconds and report a single, aver-
aged value on the graphing device screen.
SELECTED EVENTS – Data are collected
one point at a time and only when the
b button on the graphing device is
pressed.
START
The START option begins data collection
using the current mode. If at any time you
wish to stop the data collection prematurely
in a TIME GRAPH, press the X key.
GRAPH
The GRAPH option allows you to
manipulate your graph. When chosen, the
graph will be redrawn.
due to memory constraints.
TM
APPENDIX A
SELECT REGION – Allows the selection of
a region of the graph for further analysis.
Be aware that this will delete the portion of
data that was not selected.
RESCALE – Allows you to change the x
or y-axis scale or autoscale your graph.
ANALYZE
The ANALYZE option produces this list of
analysis features.
CURVE FIT – Displays a list of curve fit
options including linear, power, quadratic,
and exponential fits.
ADD MODEL – Allows manipulation of
the coefficients of a function entered in
Y1 = (outside the DataMate program)
STATISTICS – Displays the mean, min,
max, standard deviation, and number of
data points of a selected region.
INTEGRAL – Integrates a selected region
of the graph.
TOOLS
The TOOLS option produces this list of
features.
STORE LATEST RUN – Temporarily stores
the latest run. Only one sensor can be used
and only two runs can be stored.
RETRIEVE DATA – Retrieves data stored
on the interface from remote data collection.
CHECK BATTERY – Displays the battery
power of the interface.
Related instructions adapted from
Vernier Software & Technology
TEXAS INSTRUMENTS INCORPORATED
.
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