This setup is for measurement of vibrations with a frequency of 1 Hz or lower, which cannot be measured with a conventional accelerometer. It is suitable for measurement of vibrations in buildings and other large structures.
Measurement of blasting vibrations may be performed either by measuring vibration acceleration levels or vibration velocity levels. The measuring equipment has to be selected accordingly.
A level recorder is an analog device that transcribes time-based changes in sound pressure level or vibration level onto recording paper.