Stroboscope
Commissioning Air Systems (BG 49/2015), written by Chris Parsloe and published by BSRIA in March 2015, explains how to commission ducted air distribution systems in buildings. It was originally published in 2013 and was then updated in 2015.
It states: ‘The stroboscope is a source of variable frequency light pulses and its technique is to match the source pulse frequency to the rotational speed. A chalk mark (or similar) is made on the pulley and the stroboscope is adjusted until the mark appears stationary. It is, however, possible to obtain a stationary image with a sub-multiple (50%, 25% and 33% etc.) of the actual shaft speed and such errors of harmonics need to be eliminated to assess the correct speed. A convenient method is to start at high speeds where multiple images are obtained. Due to this inherent problem and the need for experience in its use, the stroboscope is only recommended when it is impossible to use one of the other rotational speed measurement instruments.’
--BSRIA
[edit] Related articles on Designing Buildings
Featured articles and news
Top 50 firms awarded 52bn of projects in the last year
New engineering data shows.
Enhancing construction site reporting efficiency
Through digitisation and the digital revolution.
Noise in the built environment
BSRIA guide TG 20/2021.
17,000 people suffer conditions as a result of exposure to excessive noise at work.
Turning down the noise: Auditory health
A pervasive risk with far-reaching consequences.
UK Construction Week, London is here !
Debuting major international pavilions and much more.
Getting the most out of heat pumps and heating
How heat pumps work and how they work best.
Plumbing and heating for successful retrofit and renovation
Low temperature underfloor systems and heat pumps.
Cost-of-living crisis and home improvement plans
Starting on the right footing and top tips for projects.
Delays on construction projects
Types, mitigation and the acceleration of works.
From Chaucer to Fawlty Towers.
Electrotechnical excellence, now open for entries.
Net zero electricity grids BSRIA guide NZG 5/2024
Outlining the changes needed to transition to net zero.
CIOB Global Student Challenge 2024
Universitas Indonesia wins for second year running.
ECA 2024 Apprentice of the Year Award
Entries open for submission until May 31.