Accelerometer Type 4515-B is specially designed for the measurement of whole-body vibration. It consists of a triaxial accelerometer housed in a semi-rigid nitrile rubber disc and complies with ISO 7096, ISO 2631 and ISO 10326-1. It can be placed under a seated person, on a vibrating surface with a suitable weight on top, or strapped onto the body. It detects vibration in directions along the body, back-to-front, and side-by-side.
Uses
Field measurements of human whole-body vibration
Test and measurement of passenger and work vehicles
Features
Complies with ISO 2631, ISO 7096, and ISO 10326-1
Removable triaxial accelerometer built into rubber pad
Low impedance output
High resolution : 100 mV/g
Exceptional lower limiting frequency
The built-in accelerometer is mounted inside the rubber pad by means of a clip facilitating easy removal, calibration, and subsequent remounting.
The 3 m integral cable terminates in 3 x 10-32 UNF connectors. Furthermore, 3 x JP 0145 adaptors 10-32 UNF to BNC are supplied for flexible connectivity.
Characteristics
Type 4515-B has a DeltaTron® built-in preamplifier providing a low-impedance output. The sensitivity is expressed in voltage per unit acceleration - mV/m/s².
The OrthoShear® design used in Type 4515-B is built around a common seismic mass. This uni-mass design results in a very compact triaxial accelerometer with excellent low-frequency response. All the axes have the same point of reference and the design also ensures accurate and consistent measurements, even when the accelerometer is exposed to complex vibration patterns.
Calibration
Prior to mounting the accelerometer in the rubber pad it is individually calibrated, providing an 800-point, high-resolution calibration (magnitude and phase) giving a unique characterisation and securing the integrity of the typical frequency response of the seat pad.
The sensitivity given in the calibration chart has been measured at 159.2 Hz with an acceleration of 100 m/s². For a 99.9% confidence level, the accuracy of the factory calibration is ± 2%.
