An Evaluation of Magnetic Mounting of Accelerometers.

The performance of magnetic clamps as a means of attaching accelerometers for machinery vibration surveys is investigated. Three conditions that might adversely affect magnetic clamp effectiveness are looked at in detail 1 the presence of cross-motion, 2 the mounting conditions, and 3 the presence of high levels of acceleration. Results are given for six commercially produced magnetic clamps. Cross-motion and high acceleration are found to have little effect on magnetic clamp response to the extent tested. Improper mounting is found to affect response greatly. Procedures are recommended for attachment of clamps and results of tests using these procedures are shown to be reproducible.