There are so many types of accelerometer that is often difficult to know what type of accelerometer to use. An IEPE accelerometer will have a high pass filter at about 5Hz. The charge type will, by it’s nature have what is effectively a high pass filter at about 0.1Hz. Therefore neither type will show DC levels. The charge type will usually have a lower frequency bandwidth than the IEPE type. Charge accelerometers can be used at higher temperatures however. Continue reading What Type of Accelerometer Should I Use? IEPE, Charge or Bridge-based?3381class="post-3381 post type-post status-publish format-video hentry category-p8000 category-tutorial category-video tag-acoustic tag-data-acquisition tag-data-capture tag-noise tag-p8000 tag-scheduler tag-scheduling tag-sound tag-vibration post_format-post-format-video"
A video that explains how to set up the DATS Data Acquisition software to perform captures at specific, scheduled times.
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The DATS Modal Analysis software consists of Hammer Impact Testing, Modal Analysis & Structural Animation (often referred to as Operational Deflection Shapes or ODS and Running Modes). Having measured and analysed your data the Structural Animation software allows you to visualisation your structure under certain operating conditions. These visualisations can then be saved as AVI files. This video shows you how…
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In the process of looking at some order data, a question about the accuracy of the measurement of the signal level of discrete frequency signals which were close to the general noise level. To answer this question, a small DATS worksheet was created which generated 2 signals. The first signal was a 35 Hz sinusoid which, by itself the spectrum level was measured to be approximately -9 dB (ref 1 V) as seen in Figure 1.
Continue reading Relative signal levels of a sinusoid with and without background noise3330class="post-3330 post type-post status-publish format-standard hentry category-dats category-p8000 category-tutorial tag-acquisition tag-calculated-channel tag-data-acquisition tag-data-capture tag-dats tag-hardware tag-non-linear tag-p8000 tag-polynomial tag-software tag-thermocouple"
Case Study: What can I do if the transducer I am using has a non-linear sensitivity over its measuring range?
Recently a PROSIG user wanted to measure a specific temperature parameter on a running engine. The transducer being used was one of the engine sensors built into the engine operating system to minimize engine emissions and maximize fuel economy. Unfortunately, the sensitivity of this transducer was not constant over the desired temperature range. The question then became, how can the output from this non-linear transducer be used to accurately measure the desired temperature parameter? Continue reading Creating calculated signals with DATS Acquisition3100class="post-3100 post type-post status-publish format-standard hentry category-p8000 category-signal-processing tag-angle-domain tag-encoder tag-order-domain tag-order-plot tag-orders tag-pulses tag-pulses-per-rev tag-revolutions tag-shaft tag-synchronous"
When working in the synchronous/angle domain, how many samples per revolution are required to study a particular order.
To study the nth order we need samples per revolution. Continue reading How Many Samples Per Revolution Are Required To Study A Particular Order3320class="post-3320 post type-post status-publish format-video hentry category-tutorial category-video tag-dats tag-noise tag-order-tracking tag-rotating-machinery tag-rotational-speed tag-speed-signals tag-tacho tag-tacho-signal tag-tachometer tag-vibration tag-vibration-data tag-vibration-signals tag-video tag-waterfall-plot post_format-post-format-video"
So you’ve got some noise and/or vibration data from a rotating machine, but no speed information. Surely that means you can’t analyse against speed or do any order analysis, right? Well, not quite!
The DATS Rotating Machinery option now comes with a tool to create speed v time data using your noise or vibration signals.
Watch the video to find out how…
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The DATS Rotor Runout Measurement package can be used on any shaft where the following probes are available…
With these three sensors it is possible using the DATS Rotor Runout Measurement package to find both electrical and mechanical runout.
* Total runout is a composite tolerance including the effects of cylindricity and concentricity, co-axiality, straightness and parallelism along the axis.3305class="post-3305 post type-post status-publish format-video hentry category-dats category-tutorial category-video tag-acoustics tag-analysis tag-cursors tag-measurement tag-noise tag-sound tag-vibration tag-video post_format-post-format-video"
A tutorial by James Wren (Prosig UK) on how to use the reference cursors in the DATS software to precisely measure features in your data.
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There are a number of ways to find the natural frequency (resonance) of a part like an automotive inlet manifold. Here are three different types of popular test technique. But which one should you use and why? Continue reading How do I find the natural frequency of an inlet manifold?Proudly powered byWordPressDesign byBlogoLife