PASCO PS-3219 Product Manual

Wireless Motion Sensor
Hardware
Included Equipment
• Wireless Motion Sensor
• Micro USB Cable
Required Item*
• PASCO Capstone or SPARKvue
Other Items
• PASCO Cart and Track Dynamics System
• Motion Sensor Guard
• Motion Sensor Bracket
• Cart Adapter Accessory
Sensing Element
ON/OFF button
Micro USB port
Angle Indicator
Micro USB cable
Bluetooth LED
Device ID
Battery LED
Thumb screw
Introduction
The Wireless Motion Sensor is a combination wireless and USB
sensor that connects to a computer or a tablet device through
Bluetooth, and can also connect to a computer with a USB cable
(included). The sensor measures distances to an object from 15
centimeters to 4 meters. The sensing element can be rotated
180 degrees. The sensor can be mounted on the end of any
PASCO track, or on a support rod up to 12.5 millimeters in
diameter. Use the Cart Adapter Accessory to mount the sensor
on any PASCO Dynamics Cart. (See "Equipment Mounting".)
(PS-3219)
How It Works
An electrostatic transducer in the face of the Wireless Motion
Sensor transmits a burst of sixteen ultrasonic pulses with a
frequency of about 49 kHz. This burst of pulses can be heard as
a single click. The ultrasonic pulses reflect off the target and
return to the face of the sensor.
Sound intensity decreases with distance; to compensate, the
sensor increases the gain of the receiver amplifier as it waits for
the echo. The increased gain allows the sensor to detect an
object up to 4 m away. The lower gain at the beginning of the
cycle reduces the circuit's sensitivity to echoes from false
targets.
The sensor measures the time between the outgoing pulses and
the returning echoes. It uses this time and the speed of sound to
calculate the distance to the target. To determine velocity, the
software uses consecutive position measurements to calculate
the rate of change of position. Similarly, the software determines
acceleration by using consecutive velocity measurements.
Using the Sensor
The sensor is designed to work with PASCO data collection
software to measure distances to an object in front of the
sensing element. The software displays position, velocity, and
acceleration.
Software Help
See the SPARKvue Help or PASCO Capstone Help for
information about collecting, displaying, and analyzing data.
• In SPARKvue, select the HELP button (
including the Home Screen.
• In PASCO Capstone, select PASCO Capstone Help from
the Help menu, or press F1.
Initial Step: Charge the Battery
• Connect the Cable: Use the Micro USB Cable to connect
the micro USB port on the end of the sensor to a USB port
or USB charger such as the PASCO PS-2575A Universal
USB Charger. Charging begins automatically. The charger
circuit inside the sensor turns itself off when the unit is fully
charged. The battery status LED will shine yellow as the
battery as charging, and will shine green when the battery
is charged. The battery is partially charged at the factory.
Initial charging time may be three hours or longer
depending on the power source and the condition of the
battery.
Product Guide | 012-15991B
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