The design of the Physics program allows you to delete subprograms which will free up space for data.

***If you are using a TI-83plus calculator, the PHYSICS program is stored on the calculator as an Application. The PHYSICS Application is stored in a special part of memory, and the subprograms are not available for selective deleting. Due to the extra memory available on a TI-83plus, it is not necessary to worry about freeing up memory.***

The following is a brief description of the subprograms that make up the Physics program. The subprograms you delete will depend upon the type of data you collect or the analysis features you use. For example if you are not going to use photogates or smart pulleys, delete the PHZTIMER subprogram. If you are not going to use a microphone, delete the PHZMICRO subprogram. These two examples are safe choices for deletion. Other subprograms can be deleted but with care. One concern is that if you delete subprograms, students may choose menu options that call on those subprograms. If the subprograms are not present, the program will crash.

Contact Vernier Software if you have further questions.

PHYSICS – This is the main program that controls the set up of the probes and the experiment.

PHZCALIB – This calibration program provides three options allowing you to: 1) to use a default calibration, 2) perform a new calibration, and 3) manually enter the slope and intercept for a known calibration.

PHZCALS – This file contains the intercept and slope values for each Vernier analog probe. You can edit this file with the calibrations of your set of probes.

PHZMATCH – The PHZMATCH program is called to allow your students to try to match distance and velocity graphs. (This is another good candidate.)

PHZGRAPH – This program performs various graphing functions.

PHZMICRO – PHZMICRO is called when you select the Microphone from the list of probes. It handles data collection with the Microphone.

PHZMONIT – This program is called when you want to monitor the readings from one or more channels.

PHZOPTIO – PHZOPTIO is used to select regions of data, determine integrals, and set experiment triggering. (If you do not use the analysis features of the program, delete this.)

PHZTIMEG – This program produces graphs of active channels as a function of time. If only one probe is active, a real time graph can be displayed on the calculator as the data is collected. If more than one channel is active, a real time graph will not be available. You will have to wait until the data collection is done in order to see the graphs.

PHZTIMER – This program is called when you select the photogate from the list of probes.

PHZTRIGG – This program supports the trigger/prompt and trigger data collection modes. Each time you press the [TRIGGER] button data is stored in the CBL. In the trigger/prompt mode you will be prompted for an independent variable. In the trigger mode, you will not be prompted for a variable.

PHZUTILS – This program performs modeling and curve-fitting functions. (A good candidate if you do not use the modeling and curve fitting features of the program.)