Rockwell Automation 1441-PEN25-Z Enpac 2500 Data Collector - Manual (Page 256)

256 Rockwell Automation Publication GMSI10-UM002D-EN-E - August 2012
Chapter 10 Run Up/Coast Down Application
The application acquires a simultaneous noise or vibration signal and a
tachometer signal.
Figure 35 illustrates a typical Run Up/Coast Down setup.
The setup includes an accelerometer attached to channel 1 of the Enpac 2500, an
optical tachometer signal connected to the units power socket, a tripod for
tachometer signal stability, and a speed reference trigger. A small piece of
reflective tape on the part of the shaft can serve as a reference trigger or you can
simply pass the laser over a notch in the shaft.
Figure 35 - Run Up/Coast Down Setup
The recorded data is saved in the form of a time waveform (a Microsoft .wav file).
It can be analyzed as many times as required and can be viewed in a variety of
different formats including:
• Bode Plot
• Nyquist Plot
• Table
• Waterfall
• Spectrogram
Accelerometer
Tripod
Tachometer
Reflective Tape