There are four condition indicators RMS, Max RMS, PEAK, and Crest Factor. Easy to explain and use, it can give you an overview of an assets health with just one reading.
Let’s go over them in more detail:
- RMS – use it to indicate trends in friction levels (lubrication, stage 1&2 bearing failure)
- Max RMS – use it to indicate ultrasound signal stability (steam traps, chain drives, flexible couplings, linear bearings)
- PEAK – use it to indicate impacting (shift from stage 2 to stage 3 bearing failure, fatigue, gear mesh, broken gear teeth)
- Crest Factor – use it to correlate the relationship between friction and impacting on any asset (perfect for VFDs!!)
- Gas & Valve Leak – RMS
- Lubrication – RMS
- Steam Trap – RMS & Max RMS (+Peak for flash steam)
Impacting:
- Bearing, Gears – Peak & RMS (+Crest Factor)
Cavitation:
- Cavitation – Peak
Check out our SDT 200, 270, and 340Â featuring the four condition indicators to detect, trend and analyze ultrasound and vibration.
Filed under:
Maintenance Tips, Ultrasound by Allan Rienstra - SDT Ultrasound Solutions