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Drives, Gears & Motors

Pre-compliance EMC Test

Roxburgh EMC answered a few of our questions about their pre-compliance EMC testing service

Can you tell us a little bit about Roxburgh EMC? A brand of the Alpha 3 Manufacturing Ltd group, Roxburgh EMC is a UK manufacturer of EMC Filters and EMC Components. We work with a wide variety of market sectors from IT and Security to HVAC, Renewables, Military and more, assisting customers in meeting the relevant EMC directives for their industry. To support our range of products, we also offer Pre-Compliance EMC testing which can be performed in our laboratory or on the customers’ site at their own convenience

What is a pre-compliance EMC test? A notified body is an organisation designated by an EU country to assess the conformity of certain products before being placed on the market. Part of the requirements placed on manufacturers of electrical and electronic equipment is EMC compliance testing which verifies that the product is not liable to cause electromagnetic disturbance or the performance of which is not liable to be affected by such disturbance.


Roxburgh EMC have a pre-compliance EMC laboratory which is equipped with calibrated equipment similar to that used by notified bodies. We can perform the same tests and experiment with solutions until the equipment passes. Alternatively, some manufacturers prefer to self-certify their products for sale in the EU. Here a file of supporting evidence should be kept to demonstrate that due diligence has been followed with respect to compliance with the relevant standards. A pre-compliance test report such as that produced by Roxburgh EMC can be used as evidence of this due diligence.

Who is required to prove compliancy? All producers of electronic and electrical equipment onto the European market must either have an assessment by a notified body or self-certify and be able to demonstrate due diligence. Many changes to existing compliant products can also alter the EMC performance and render a product non-compliant. Changes to wiring routes, power supplies, case materials or

construction and device functionality can all adversely affect EMC.

What are the implications of non-compliant products? The main aim of the regulations are to prevent a producer’s equipment from interfering with the function of another piece of equipment. If a non-compliant product were to affect something safety critical such as medical equipment or industrial machinery then very serious consequences could occur including fatality. If a producer has chosen (or by dint of the type of product they produce has been forced to) employ the services of a notified body then non-compliant products will not be allowed onto the market. If a producer has self-certified and due diligence cannot be demonstrated during the investigation that follows any compliant or incident then the leaders of the self-certifying company are at risk of criminal convictions and in some cases prison.

Health & Safety

Quantifit respirator fit tester MEPCA caught up with Shawcity to ask them a few questions about their Quantifit Respirator Fit Tester. Can you tell us about Shawcity? As one of the pioneers in detection instrument technology for over 40 years, we at Shawcity have always focused on introducing the latest monitoring technology to the UK and Ireland. Our customers work in Health and Safety, Occupational Hygiene and Environmental applications. We provide monitoring instrumentation for: Personal and Area Gas Detection, Ground Gas, Contaminated Land, Noise, Sound, Vibration, Air Quality and Dust, Heat Stress, Fit Testing and Audiometry.

What is the Quantifit Respirator Fit Tester? Quantifit, a well-established product in the USA already used by hundreds of companies and organisations including industrial manufacturers, fire departments, law enforcement, has just become available in the UK and Ireland, exclusively through Shawcity Ltd. It is widely recognised as the industry breakthrough in portable mask-fit technology as it uses Controlled Negative Pressure (CNP) technology instead of traditional aerosol particle counting. Its simpler testing technology means it’s ready to test after just a one-minute daily calibration in virtually any environment – even out in the field - so long as air and a power supply is present, a unique benefit over its competitors. It is suitable for use in any industry where respirator fit testing is applicable – including hazardous or explosive environments - and as it requires no set-up or special conditions, it also speeds up the process of fit-testing.

So how does Quantifit work? Face mask fit is measured by simulating movements approximating real life and the easy-to-use, simple operation means many users self-test once trained. During a fit test the respirator inlets are capped with test adapters and the inhalation valves are propped open or removed from


the mask. With the test subject holding his or her breath for no more than ten seconds, the Quantifit then establishes and maintains a slight vacuum, or controlled negative pressure, inside the mask. Since the respirator inlets are sealed, all sources of leakage into the mask are through the face-to-facepiece seal or due to integrity issues. The volume of air drawn out of the mask by the Quantifit during this short period of time is equal to the leak rate into the mask through the face-to-facepiece seal. Offering very quiet operational noise, Quantifit is a standalone unit weighing less than 3.5kg. It also stores up to 500 fit tests on the unit and can retain this data without power for two years.

Is Quantifit more efficient? Quantifit’s design and technology help to make it a more time- and cost-efficient system compared to other technologies. As an example, it contains no internal optics, which can become contaminated during aerosol testing. Sometimes this contamination, which is specific to aerosol technology, means the unit must be sent back to the manufacturer for cleaning. Quantifit also doesn’t need time to create aerosol testing conditions or any need for replacement consumables.

If customers have a limited number of employees to test, Quantifit can also be hired instead of purchased, removing the cost of ownership altogether.

MEPCA Magazine May 2018  
MEPCA Magazine May 2018