James Wren

Author's details

Name: James Wren
Date registered: September 1, 2011
URL: http://www.linkedin.com/profile/view?id=70047234


James Wren is an Application Engineer and the Sales Manager for Prosig Limited. James graduated from Portsmouth University in 2001, with a Masters degree in Electronic Engineering. He is a member of the Institution of Engineering and Technology. He has been involved with motorsport from a very early age with special interest in data acquisition. James is a founder member of the Dalmeny Racing team.

Latest posts

  1. Is it possible to connect the BNC outer to ground when using a P8000? — April 1, 2015
  2. Automatic Reports Using The Intaglio Report Generator — March 19, 2015
  3. What is the maximum analysis frequency for a waterfall in DATS? — March 19, 2015
  4. Creating Order Plots Using The DATS Rotating Machinery Software — March 3, 2015
  5. Making an Orbit Plot — January 23, 2015

Most commented posts

  1. How To Choose A Sample Rate For A Required Analysis Frequency Range — 2 comments
  2. What engineering decisions are made by measuring a power spectrum? — 2 comments

Author's posts listings

Apr 01

Is it possible to connect the BNC outer to ground when using a P8000?


A question was recently posed regarding the grounding conditions of a BNC type input. The shield or outer of a BNC cable or connector is not connected to the chassis or ground. What would happen if it was connected to ground?

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Automatic Reports Using The Intaglio Report Generator

Mar 19

What is the maximum analysis frequency for a waterfall in DATS?

The maximum analysis frequency is always half the sample rate of the input signal. So if your data is captured at 50kHz the maximum analysis frequency will be 25kHz.

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Mar 03

Creating Order Plots Using The DATS Rotating Machinery Software

Time series loaded into DATS software

In this tutorial we will be creating order plots using waterfall and intensity displays using use the DATS.toolbox and Rotating Machinery Analysis option. To begin, a noise, vibration or other signal of interest should be captured along with a tachometer signal. In Figure 1 we have loaded a time series (in this case an acceleration …

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Making an Orbit Plot

A short video tutorial describing how to create an orbit plot using the DATS software

Jan 21

How to use an Analogue Channel with Tachometer Signals on the P8000

When using an analogue channel input channel of a P8000, with a tachometer sensor, is it possible to utilise the tachometer processing functions as you would if you were using a tachometer input of the P8000? For example could you display an RPM on an analogue channel? When using an analogue channel it is possible …

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Sound Mapping Software Example

Aug 28

What is waterfall frequency spacing? And how does the DATS parameter ‘Requested Frequency Spacing’ work?

Let us try to understand what waterfall frequency spacing is. Waterfall frequency spacing is the gap between spectral lines in an FFT plot. For example, if you had an analysis frequency of 0Hz to 100Hz and 100 spectral lines, then Frequency Spacing is 1Hz. So why is there a ‘Requested Frequency Spacing’ and an ‘Actual Frequency …

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Aug 20

What is “waterfall smearing”?

Waterfall created using a suitable frequency resolution

When analysing a waterfall or performing order analysis it is important to consider the frequency resolution or the frequency spacing. There is often a desire to increase the resolution to finer and finer detail. But that is a process of diminishing returns, and actually fraught with danger. And that danger is waterfall smearing.

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Jul 28

Multiplane Balancing – Zero Imbalance or Specified Imbalance

In the DATS Multiplane Balancing Software, there are two options, optimise for ‘Zero imbalance’ or optimise for ‘Specified imbalance’, but what is the objective of these two options?

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