Go Direct Motion accurately tracks objects as close as 15 cm and as far away as 3.5 m. The compact design and wireless capabilities of this motion detector eliminate the concern of a dangling cable getting in the way.
Use the temperature compensation channel of Go Direct Motion to adjust for the difference in the speed of sound in cold and warm locations.
Go Direct Motion can be used in a variety of experiments:
- Study position, velocity, and acceleration of carts on a track.
- Match graphs created in data-collection software.
- Analyze the effects of air resistance on falling coffee filters.
- Investigate simple harmonic motion by monitoring a mass on a spring.
Note: Vernier products are designed for educational use. Our products are not designed nor are they recommended for any industrial, medical, or commercial process such as life support, patient diagnosis, control of a manufacturing process, or industrial testing of any kind.
Using the Product
Connect the sensor following the steps in the Getting Started section of this user manual.
Go Direct Motion has three measurement channels. The channel names are
- Motion (cart)
- Motion with TC
The default channel that is active when the sensor is connected is motion. The motion channel is set to measure the distance between the sensor and the nearest object based on the speed of sound at 22°C. This channel has a high gain and is best for most uses, such as measuring the motion of a tossed ball, a walking student, or a mass on a spring.
This channel has a lower gain setting than the default motion channel. It is useful for measuring a cart on a track as this channel is less likely to pick up objects to either side of the track. Use this channel for small objects close to the motion detector.
Motion with TC
Use the motion with TC channel for automatic temperature compensation, which adjusts the speed of sound used in the distance calculation based on an internal temperature sensor. This is particularly useful if you are using the sensor in an environment that is much warmer or much cooler than room temperature.
Care and Maintenance
Go Direct Motion contains a small lithium-ion battery. The system is designed to consume very little power and not put heavy demands on the battery. Although the battery is warranted for one year, the expected battery life should be several years. Replacement batteries are available from Vernier (order code: GDX-BAT-650).
Storage and Maintenance
To store Go Direct Motion for extended periods of time, put the device in sleep mode by holding the button down for at least three seconds. The red LED will stop flashing to show that the unit is in sleep mode. Over several months, the battery will discharge but will not be damaged. After such storage, charge the device for a few hours, and the unit will be ready to go.
Exposing the battery to temperatures over 35°C (95°F) will reduce its lifespan. If possible, store the device in an area that is not exposed to temperature extremes.
Go Direct Motion is not water resistant and should never be immersed in water.
If water gets into the device, immediately power the unit down (press and hold the power button for more than three seconds). Disconnect the sensor and charging cable, and remove the battery. Allow the device to dry thoroughly before attempting to use the device again. Do not attempt to dry using an external heat source.