A heritage screen is a starting screen derived from recent successful screening experience on equipment of comparable design and manufacture. Ideally, this experience would have been based on Method A. A heritage screen should only be considered if there are data substantiating its effectiveness. Government approval is required for use of Method D.
The baseline vibration profile in Table 3-3
is a heritage screen derived from general vibration screening experience. It can be used as a starting screen when it is not possible to perform a vibration survey.