![[image]](gifs/pasco6742.gif)
Description
The PASCO CI-6742 Motion Sensor II is a sonar ranging device with a sensing
range of 0.15 to about 8 meters. When used with an interface, the Motion Sensor
II emits ultrasonic pulses and detects pulses returned as echoes from the target.
The Science Workshop program calculates the distance to the object from
the speed of sound and half the sonic pulse round trip time. The program can also
calculate velocity and acceleration from the distance and time measurements. The
trigger rate for the Motion Sensor can be set in the Science Workshop program
to trigger as few as 5 times per second (for recording relatively slow events
over large distances) or for as many as 120 times per second (for quick events
such as a free-fall experiment).
| Range | 0.15 to 8 metres |
|---|---|
| Audible | 16 pulses at 49 KHz |
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Insert the yellow phone plug into digital channel I (or 1, 2, or 3 for ScienceWorkshop series 700 and 750 interfaces). Insert the black phone plug into digital channel 2 (or 2, 3, or 4 for Science Workshop series 700 and 750 interfaces).
Note: The Motion Sensor can be connected to any two adjacent digital channels on the interface, with the yellow plug in the channel with the lower number. The yellow plug carries the transmit signal from the ScienceWorkshop interface to the sensor, and the black plug carries the return, echo signal, from the sensor to the Science Workshop interface.
Run the ScienceWorkshop program. In the Experiment Setup window, set up the ScienceWorkshop interface and sensor so the Motion Sensor is connected to the correct digital channels of the interface.
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