Vibration Instruments

Question 1

Data Collectors Provide can Provide:

Answer 1

Raw Data
Phase Readings
Spectra
Time Wave

Question 2

What collector only provides part of the information and no detailed analysis? What does it provide?

Answer 2

Meter

It Provides Vibration Severity/Amplitude

Question 3

What is an Oscilloscope?

Answer 3

An instrument for examining waveforms with an uncorrupted vibration signal

Question 4

What is an FFT?

Answer 4

Fast Fourier Transform

Converts a time-based waveform, amplitude vs. time, INTO a Spectrum, which is amplitude vs. frequency.

Question 4

If you have 400 Lines and a Frequency Span of 1,000 Hz on a Spectrum, what is your bin width?

What does your bin tell you?

Answer 4

1,000Hz/400 = 2.5 Hz.

The Bin tells me that no two frequencies closer than 2.5 Hz can be distinguished from each other.

Question 5

The spectrum which broken down into ______ or ______ on the horizontal scale shows the __________ content of the waveform.

Question 6

Measured frequencies on a Spectrum are matched to?

Answer 6

Known machine frequencies like operating speed to diagnose faults

Question 7

What is a Bin?

How do you find Bin Width?

Answer 7

Area inclusive of the line/frequencies where data is stored.

Highest Frequency divided by number of lines