In the Set Distance or Length dialog you can set up the characteristic distance you want to use for calculations of position, velocity and acceleration. This distance, often the width of a flag or object, allows Logger Pro to calculate velocities from the raw photogate timing data. You can also manually enter a value for a custom device. Access the dialog by choosing Set Up Sensors from the Experiment menu. Click the Photogate port and select Set Distance or Length from the drop-down menu.
To set up your device, perform the following in the Set Distance or Length dialog according to the mode you are using:
When using the Pulse or Gate setting, you can select the length of the object that will be passing through the gate.
The distance or length value is stored in a user parameter. You can insert a parameter control for easy adjustment if desired.