Application Guide

Adjusting the Playback Rate
To adjust the playback rate:
1. Select Experiment > Replay > Playback Rate.
The Playback Rate dialog box opens.
2. In the Playback Rate field, click ▼ to open the drop-down list.
3. Select the rate at which the playback will play.
Normal speed is 1.00. A higher value is faster, and a lower value is slower.
4. Select one of the following options:
• Click Start to start the playback and save the settings.
• Click OK to save the settings for use on the next playback.
Repeating the Playback
1. Select Experiment > Replay > Start Playback.
2. Click Start to start the playback and save the settings.
Adjusting Derivative Settings
Use this option to select the number of points to use in derivative calculations. This
value affects the tangent tool, velocity, and acceleration values.
Find pH derivative settings using a calculated column.
The Vernier DataQuest™ application can determine a numeric derivative from a list of
data with respect to another list of data. The data can be collected using sensors, input
manually, or linked with other applications. The numerical derivative is found using a
calculated column.
To determine the numerical 1st derivative of List B with respect to List A, enter the
following expression in the Column Options dialog:
derivative(B,A,1,0) or derivative(B,A,1,1)
Data Collection 465