Texas Instruments TINSPIRE Teacher Software Guidebook - Page 731

Setting a Time Based collection mode The Time Based option captures data with respect to time. This is the default mode for new experiments. To set the collection mode as Time Based: 1. Select Experiment > Collection Mode > Time Based. The Configure Time Based Data Collection dialog box opens with either Interval or Rate selected. (It uses your previous settings as the opening value.) or Rate (samples/second) Interval (seconds/sample) 2. Select Rate or Interval mode from the drop-down menu. Rate and Interval are used to determine how often data points are collected. For convenience, you have two methods in which to enter this information. Rate and Interval are simply reciprocals of each other. • Rate (samples/second): Enter the number of samples per second. The interval is calculated. • Interval (seconds per sample): Enter the number of seconds per sample. The rate is calculated. 3. Enter the rest of values in the Configure Time Based Data Collection dialog box. • Duration (seconds): Enter the duration that the data collection should last. • Number of points: This is a calculated field. Review this value to ensure your rate and duration are reasonable. This value is determined by the formula, Rate * Duration + 1. Important: Collecting too many data points impacts system performance. Data Collection and Analysis 719