Unique Solutions for Clinical And Research Applications - Biometrics Ltd.
Accelerometers - 3 axes
Precision sensors providing a complete ready to go solution for measurements of acceleration in 3 axes
ACL300
2 Model Options:
ACL300 range ± 10G
S3-100G-HA range ± 1000G
The sensors are focused to the needs of the researcher with high precision yet ease of use in mind. Designed for general research applications in the fields of medicine, industrial ergonomics and sports science, the accelerometers when combined with the versatility of the Biometrics’ DataLINK or DataLOG data acquisition systems make an ideal research and teaching tool.
Features
- 3 independent axes, X, Y, Z
- Variable full scale measuring range (adjusted within DataLINK or DataLOG management software, 100%, 30% or 10% of full scale)
- 3 levels of adjustable frequency response
- 8th order anti-aliasing filter on each channel with user selectable corner frequencies
- Low impedance outputs for excellent noise performance
- Non critical input power requirements
- Electronic calibration adjustments giving high stability under vibration and over time
- Signal conditioning electronics housed in a separate small enclosure allowing for miniaturization of the accelerometer probe
- Easy interface to many other data acquisition systems
By simply plugging either accelerometer model into the Biometrics’ DataLOG, DataLINK or K800 instruments, accelerations may be displayed & analysed in units of G or m/s2
The small lightweight “active” head may be mounted practically anywhere using double sided adhesive tape,
or held securely in place using a mechanical clamp for higher loading.
There is no need to calibrate either model as this is done during manufacture. They are ready to go giving accurate readings for both static and dynamic applications.
The ACL300 will measure both dynamic acceleration (i.e. vibration) and static acceleration (i.e. gravity). It is ideal for multiple research applications as it comes with selectable low pass filter settings standard at 100Hz, 500Hz and 2500Hz. We are pleased to produce custom units with different combinations of low pass filter settings at your request.
Specifications
| Model | ACL300 | S3-1000G-HA |
| Range | ± 10G | ± 1000G |
| Mass | 10g | 8g |
| Dimensions | 19.0 x 12.7 x 10.9 mm (L x D x H) | 14 x 13 x 14 mm |
| Case material | anodised aluminium | Titanium alloy |
| Supply Voltage | +4.50 to +5.50 Vdc | +4.50 to +5.50 Vdc |
| Sensitivity | ± 100mV / G | ± 1mV / G |
| Cross talk | < 5% | < 5% |
| Accuracy | Better than ± 2 % full scale | Better than ± 2 % full scale |
| Bandwidth | DC to 100, 500, 1000 Hz | DC to 1250, 2500, 5000 Hz |
| Filter | 8 pole, 8th order 1.2 Elliptic | 8 pole, 8th order 1.2 Elliptic |
| Shock survival | 500 G | 5000 G |
Direct interface to Biometrics’ DataLOG, DataLINK & K800
Easy interface to many other data acquisition systems
Bandwidth Limiting (cut-off) Filters
Each channel of both models of accelerometer are fitted with an 8th order 1.2 elliptic filter with user selectable cut-off frequencies. This provides the optimum compromise between pass-band ripple and roll-off steepness; 60 dB of rejection is achieved at 1.2 times the selected corner frequency. The filter has 3 values, which are selected by positioning a simple switch within the accelerometer interface unit.
The following table shows the possible set corner frequencies and the recommended sampling frequency set within the DataLINK or DataLOG to avoid anti aliasing according to the Nyquist Sampling Theorem.
| Model | Bandwidth | Recommended Sampling Frequency per channel of DataLINK or DataLOG |
| ACL300 | DC to 100 Hz | 200 Hz |
| DC to 500Hz | 1000 Hz | |
| DC to 1000 Hz | 2500 Hz | |
| S3-1000G-HA | DC to 1250 Hz | 2500 Hz |
| DC to 2500 Hz | 5000 Hz | |
| DC to 5000 Hz | 10000 Hz |
For a particular corner frequency it is possible to sample at rates higher than those recommended above but nothing will be gained due to the frequency limit. Using frequencies lower than those shown above is NOT recommended as the recorded waveforms will be distorted due to aliasing.