Technical Library

To support and assist engineers in the test and measurement field we will feature a range of technical articles and links on this page that can be used as reference material. In addition you will find technical details of the standard Kemo filter responses.

We also have a range of case studies that highlight some of the applications for Kemo products, this includes filters, impact hammers, accelerometers and low noise cables. Visit the APPLICATIONS page

To kick off this section we have created an introduction to electronic filters for your reference, learn all about high pass filters, low pass filters, band pass filters as well as the types of filter response such as Bessel, Butterworth and Anti-aliasing

What is Triboelectric Noise?

Many engineers are not aware of the phenomenon of triboelectric noise, this can cause siginificant noise issues in a measurement system. Triboelectric noise is ‘motion induced noise’ which can be caused in cables which are carrying a charge signal from devices such as piezoelectric sensors (for example accelerometers). As the cables flex due to movement the layers within the cable rub together causing electrostatic charge to build up, this charge must go somewhere and if the correct cable type is not used it can be added to the signal charge causing a noisy output. This issue is limited by using Low Noise Cables. This video demonstrates how low noise cable can minmise triboelectric noise.

Explaining Electronic Filters

KEMO Article – An Introduction to Electronic Filters

  • Article 1 – What is an Electronic Filter? Passive filter or Active Filter…..

KEMO Article – An Introduction to Electronic Filters

  • Article 2 – What type of Electronic Filters can I use? High Pass, Low Pass…..

KEMO Article – An Introduction to Electronic Filters

  • Article 3 – Specifying an Electronic Filter? Bessel, Butterworth, 4 Pole, 8 Pole…..

Wikipedia definition of electronic filter – Here

Wikipedia definition of analogue filter – Here

The Relationship between Acceleration, Velocity and Displacement

  • The relationship between Acceleration, velocity and displacement – DOWNLOAD

Kemo Filter Response Details

Kemo Instruments Private Ltd standard filter responses, 01, 03,05,07,09 and 41 can be used with the full range of Kemo filter products, details of these filter responses can be seen below, download the datasheet for full filteramplitude and phase response.

Filter Response 01 – Anti AliasingDownload Technical Detail

Filter Response 03 – 8 pole ButterworthDownload Technical Detail

Filter Response 05 – 4 pole ButterworthDownload Technical Detail

Filter Response 07 – 8 pole BesselDownload Technical Detail

Filter Response 09 – 4 pole BesselDownload Technical Detail

Filter Response 41 – General Purpose – Download Technical Detail

Vibration Control and Set up Articles

We are pleased to feature a number of useful articles provided by our partner in the India region RULA Technologies, we hope you find them useful.

Multi shaker Testing with RL-C21 and RL-C25 systems – DOWNLOAD

Notching Control and Why you should use it – DOWNLOAD

Setting Additional Shock limits – DOWNLOAD

What is Fatigue Damage Spectrum – DOWNLOAD

Why do we need vibration testing – DOWNLOAD