Monitoring the a motor/air handler can be accomplished by installing a single accelerometer on each bearing, 2 for the motor and 2 for the air handler. The output signal should be routed to CMCP530A Vibration Velocity Monitor. A more economical approach would be to mount accelerometers at the motor output bearing and the bearing on the pulley end of the air handler shaft since these are the bearings with the highest load, and are most likely to fail.

A complete vibration monitoring system includes:

• One accelerometer mounted to each bearing - CMCP1100

• 4 Vibration Velocity Monitors - CMCP530A

• Options include:

  • Enclosures

  • Power supplies

For additional reading STI offers several application notes with a more in depth discussion at