Below are some of the most commonly asked questions. If you are unable to find the information you're looking for please contact us.
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General Frequently Asked Questions
to the directive. The list is unique for each of the CE marking directives and a copy of the most recent for many of the directives can be found
on the European Commission web site.
before this time please feel free to contact us.
operational modes. It also allows us to prepare for any special ancillary test equipment that may be required in order to properly exercise and
monitor the unit under test. The questionnaire also allows us to verify the correct amount of test time has been allocated, and most importantly
forms the basis of any test reports/certificates that may be issued. Failure to provide a completed questionnaire before test will slow down testing
as the information will be obtained before test commence.
configurations, specific test modes, any EUT risk analysis (potential for patient harm under immunity testing etc.), special cabling earthing
considerations and declarations on equipment types and applicable test levels.
equipment, both of these are also required for carrying out safety testing.
laboratory seeking UKAS accreditation has to satisfy UKAS Assessment Managers and independent assessors that it is technically competent
and operates a quality system to rigorous international standards. Following successful assessment, UKAS will issue a schedule of accreditation
to the laboratory, which will specify those tests the laboratory has been accredited for, and for which it should issue reports bearing the UKAS
testing mark. It is in the interest of customers to specify clearly in their orders that a UKAS testing report is required for the work done by the UKAS
accredited laboratories they are using.
There may also be no need to re-test your product if there have been no technical/test changes or additions. If you would like advice on whether or not
a new version of a standard has implications on your product, please contact us and we would be happy to help.
be viewed here.
EMC Frequently Asked Questions
affixing the CE mark the manufacturer, its authorized representative, or person placing the product on the market or putting it into service asserts that
the item meets all the essential requirements of the relevant European Directive(s).
it in the design cycle, the harder and more costly it becomes to implement EMC.
that your installers have no control over the cables, then it is necessary to be more careful over the cable specification and/or the interface design.
circuits, it’s necessary for correct operation, let alone for EMC. But a ground plane needs to be applied carefully and with some thought as to its
purpose, or it won’t be effective.
is carried out. Whilst not fully conforming to the requirements of the relevant standard, it should still be carried out in a manner which will give meaningful
ESD and Surges.
• A reference to the 2004/108/EC EMC directive.
• An identification of the apparatus to which it refers.
• The name and address of the manufacturer and, where applicable, the name and address of their authorised representive. • A dated reference to the
specifications under which conformity is declared.
• Date of the declaration.
• Identity and signature of the person empowered to bind the manufacture or there authorised representive.This documentation shall be retained and kept
available for up to ten years from the time of last manufacture of the machinery.
Directive, as a general guide the following items should be included:
• Description of the apparatus, usually accompanied by block diagram
• Wiring and circuit diagrams
• General Arrangement drawing
• List of standards applied
• Records of assessment to standards
• Description of control philosophy/logic
• Datasheets for critical sub-assemblies
• Part list
• Copies of any markings and labels
• Copy of instructions (user, maintenance, installation)
• Test reports
• Quality control & commissioning procedures
• Declaration of Conformity The technical documentation shall be retained and kept available for up to ten years from the time of last manufacture of the
intended to be used permanently at a predefined location.
Radio Frequently Asked Questions
channel or channels as required by the product standard. For certain tests and to allow faster test lines, a method of getting the transmitter into a
constant RF transmission state, with and without modulation.
mode) and if not easily configured more than one test sample would be advantageous.
different power levels are also sometimes required for testing if user adjustable. Therefore software control and or hardware modifications of the devices
under test is a requirement.
improved by designing it for a wide dynamic range, so that out-of-band high level signals don’t cause non-linear operation. Low-cost designs are naturally
the hardest to optimise.
Safety Frequently Asked Questions
European (very much like the EMC Directive). It lists a set of safety requirements for electrical products sold in the EU. It applies to most electrical
products and is not limited to electrical safety but also covers mechanical, thermal, fire, energy, chemical & radiation hazards. The Low Voltage
Directive is not a ‘standard’ in the traditional sense but it’s a set of safety objectives that all electrical products should comply with. The main theme of
all the safety objectives is that the equipment should not cause any physical harm or any other kind of damage to any person, animal or building. There
are several product specific and generic standards that are listed in the Official Journal (OJ) of the European Union. Compliance with these standards
leads to the presumption of conformity with the Low Voltage Directive.
to the equipment. All telecommunications (radio + wireless) products must be tested to LVD regardless of their input/output voltage rating.
a new system. The way the PSU is loaded in end application is not necessarily the way it is loaded during testing; therefore further evaluation of the whole
unit put together is necessary.
falling under the R&TTE directive need to comply with LVD requirements irrespective of their voltage. If product is below 75 V dc yes LVD does not
apply, however the product still needs to be safe and can be tested under the General Product Safety directive. For examples most digital cameras
runs at below 75 V dc but most manufacturers still CE mark them with respect to the Low Voltage Directive. This is because they are supplied with a
mains powered battery charger, therefore as a system the unit falls under the limits of the LVD directive.
at testing systems and can be quite helpful in ensuring you comply with the safety regulations of target market. Most manufacturers are not familiar
with the regulations and changing standards w.r.t safety, therefore use of a test laboratory can save valuable time & money. Third party evaluation also
give you a marketing edge as you could use evidence of testing to promote your product (shows that you product is of a high quality). Moreover in case
of a challenge the presence of third party assessment report can work in your favour.
VCA Frequently Asked Questions
a vehicle without a host computer. A modern vehicle may have as many as 70 electronic control units (ECU) for various subsystems. Typically the
biggest processor is the engine control unit, which is also referred to as "ECU" in the context of vehicles; others are used for transmission, airbags,
antilock braking, cruise control, audio systems, windows, doors, mirror adjustment, etc. Some of these form independent subsystems, but
communications among others are essential. The CAN bus may be used in vehicles to connect engine control unit and transmission, or
(on a different bus) to connect the door locks, climate control, seat control, etc.
FCC Frequently Asked Questions
are "Intentional Radiators" and "Unintentional Radiators". An Intentional Radiator is a device that broadcasts radio energy to perform its
function. An Unintentional Radiator is an electronic device that produces radio signals that are broadcast through space, or conducted along
devices also cannot connect for the purpose of recharging batteries. Digital devices that use less than 6 billionths of a watt (6 nW) of electrical
power. Devices only used in vehicles. Specialized medical, electrical utility or commercial test and measurement devices. Appliances (white
goods), or devices used exclusively in appliances. Non-digital simple passive devices.
or lease covered equipment that has not undergone the required equipment authorization procedure. Additionally, operators must cease to use
equipment that causes interference upon notification by the FCC. The FCC does have the ability to levy fines, impose seizures and even jail
offenders. The FCC frequently targets end-users with fines to bring pressure to bear on retailers.
If the unit is not supplied with an AC/DC supply then it is reasonable to test AC conducted emissions with a random (off the shelf supply).
Cable Frequently Asked Questions