Accelerometer
Precision sensors providing a complete ready to go solution for measurements of acceleration in 3 axes.
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.
Full Specifications
Accelerometer Specifications
| 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 100Hz +/- 1dB DC to 500Hz +/- 1dB DC to 1000Hz +1dB / – 3dB |
DC to 312, 625, 1250, 2500, 5000 Hz |
| Filter | 8 pole, 8th order 1.2 Elliptic | 8 pole, 8th order 1.2 Elliptic |
| Shock Survival | 500G | 5000G |
Direct interface to Biometrics' DataLOG, DataLINK and 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 on the ACL300 has 3 values, and the filter on the S3-1000G-HA has 5 values. These 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.
| Bandwidth | Minimum Sampling Frequency per channel of DataLINK or DataLOG |
|
|---|---|---|
| ACL300 | DC to 100Hz | 200Hz |
| DC to 500Hz | 1000Hz | |
| DC to 1000Hz | 2500Hz | |
| S3-1000G-HA | DC to 312Hz | 1000Hz |
| DC to 625Hz | 1250Hz | |
| DC to 1250Hz | 2500Hz | |
| DC to 2500Hz | 5000Hz | |
| DC to 5000Hz | 10000Hz |
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.
There are two model options - the ACL300 (range ± 10G) and the S3-1000G-HA (range ± 1000G).
By simply plugging either accelerometer model into the Biometrics' DataLOG or DataLINK instruments, accelerations may be displayed and analyzed 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 1000Hz. We are pleased to produce custom units with different combinations of low pass filter settings at your request.
