Troubleshooting
- Primary test: When you start data collection, do you hear a clicking from the CBR 2? If not, the sensor may be defective. Sometimes the switch on the inside of the Motion Detector gets stuck between the two positions. Try vigorously flipping the switch back and forth.
- Secondary test: If the CBR 2 is not working, the cable could be malfunctioning. Try a cable from a working unit.
- Tertiary test: To test accuracy, find a wall with no desks, chairs, doors, or other obstructions within a 2 m field. Hold the CBR 2 in your hand, 0.5 m from the wall with the gold disc pointing directly at the wall. Do you get the expected 0.5 m reading? Back off to 1.0 m. Do you get 1.0 m? Back farther off to 1.5 m. Do you get 1.5 m?
- Quaternary test: Motion Detectors use ultrasound to measure position. Other sources of ultrasound may be interfering with the signal. Those sources include air tracks, CRT computer monitors, fluorescent lights, and power distribution panels. Identifying these sources can be challenging. You may have to resort to moving the CBR 2 away from interfering equipment. In the case of noisy fluorescent lights, turn them off (but we rarely see this problem).
Additional Troubleshooting
For additional tips related to using motion detectors, see Motion Detector Troubleshooting and FAQs
- Can I use my CBR 2 with Graphical Analysis, LabQuest App, or Logger Pro?
- What's the difference between the CBR and the CBR2?
- Can I connect an EasyTemp, EasyLink or CBR 2 directly to a TI-Nspire Lab Cradle?
- Can I use a CBR 2 with a TI-89 Titanium?
- Texas Instruments (TI) Troubleshooting and FAQs
- Can I use Go! devices with TI-84 Plus or TI-Nspire calculators or Easy devices with computers or Chromebooks?
- Is there a way to calibrate a Motion Detector?
- Should I use a photogate or a Motion Detector?
- Will your Motion Detector show the speed of a (car, baseball, racquetball)?
- Why am I getting Motion Detector readings that are noisy or max out at a certain distance?
- Why don't I get a freefall acceleration value of 9.8 m/s2 when using a Motion Detector?
- My Motion Detector is not collecting data with DataMate and LabPro.
- How do I improve the results from a Motion Detector with an air track?
- A mass fell into my Motion Detector and dented the screen. Can the gold mesh screen be repaired?
- How do I attach the Motion Detector bracket to the Vernier track?
- Which motion detector should I buy? What are the differences between them?
- Which motion detector should I get to use with my TI Calculator?
- Should I buy CBR 2, Go!Motion, or Go Direct Motion to work with Texas Instruments calculators, computers, and Chromebooks?
Specifications
- ultrasound frequency: 50 kHz
- resolution: 1 mm
- accuracy: 2 mm
- range: 0.15 m to 6 m
- speed of ultrasound used to calculate distance: 343 m/s
- power: 51 mA while running
Calibration
There is no need to calibrate the CBR 2.
Related Products
- Motion Detector Clamp (MD-CLAMP)
- Go!Motion to Computer Cable (GMC-USB)
- Digital Sensor Cable (MDC-BTD)
- Digital Extension Cable (EXT-BTD)
- Motion Detector Bracket (DTS-MDB)
- Go! Motion (GO-MOT)
- Motion Detector (MD-BTD)
- Go Direct® Motion Detector (GDX-MD)