Understanding the Interactive Waterfall Plot

This article outlines what the Interactive Waterfall Plot is, how it helps you, and how you can access it.

How can it help you?

The waterfall plot is designed to help you identify trends and changes in an FFT over time by comparing the collected frequency and amplitude data. 

This plot provides the context you need to understand what is a normal FFT for your asset, and what is not - and thus what has changed and needs investigating. 

It can also be used after you have maintained the equipment to check if there has been a decrease in the changes back towards the "normal" levels.

How does it work?

What is the Waterfall Plot?

The waterfall plot is a three-dimensional plot whereby the frequencies of an asset over time are displayed simultaneously. 

_Users_David_Downloads_plotlyWaterfall.html(Old School)

Our waterfall plot displays the collected FFT data for your asset over the past few days, weeks and months. The plot will be updated with the latest FFT every 2 days. 

How can I access it?

The chart will be located on the device page for any asset. Clicking the 'Waterfall' button will bring up the interactive plot. Please ensure that pop-ups are enabled on your web browser. Otherwise, this will stop the plot from being able to load. 

Waterfall location on dash

How do I use it?

The waterfall plot is interactive, meaning you can zoom, rotate, pan, and change the dates you are viewing. 

To pan, right-click and drag (on a trackpad you need to click and drag with two fingers). This will adjust where the plot sits on your screen.

To rotate, left click and drag (one finger on a trackpad). Doing so will allow you to rotate your view, so you can compare the data from different angles or change which axes time and frequency sit on (see below).

waterfall angle 2

waterfall angle 1

Mouseover (hovering over) the FFTs shows the frequency/magnitude.

By double-clicking on a date in the top right-hand corner you can isolate an FFT. To compare several frequencies over time, you can then (with a single click) select other dates (see below).

waterfall one date selected Screen Shot 2021-07-13 at 1.55.55 pm

Please note the colours do not have any significance. The plot simply rotates through ten different colours to help you distinguish between each FFT, and act as an indicator of time.


What else should I be looking at?

Other diagnostic features that you might be interested in are:

  • Interactive FFT: this shows you a high-resolution FFT. With some vibration analysis knowledge, you can use information about the bearings/equipment to determine a potential cause of changes in the health of your equipment.
  • Time Waveform: this allows you to listen to the accelerometer output of your machine. This gives you more information about what is going on with your equipment before going out to maintain it.


Thanks for reading. As always, if you have any questions or concerns please reach out to MOVUS Support here.