Atec Best-Plus User Manual
BESTplus / BESTemc
BESTplus / BESTemc
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Best
emc
conducted immunity
test system
The need to test
The need to test electronic equipment for
electromagnetic compatibility - in the development
lab and on the production floor - is now widely
recognized as essential for quality assurance. Not
only are the financial service and repair
implications of not doing so too great to risk, but
the manufacturer’s reputation is at stake.
By their very nature, electromagnetic interference
phenomena occur sporadically, making faults caused
by insufficient protection difficult to detect.
The European EMC Directive makes the
manufacturer directly responsible. Commercially
available equipment must not only generate no
electromagnetic interference itself, but must also be
largely immune to such influences. Through the
implementation of these laws, EMC testing has
assumed legal aspects pertaining to product liability.
Other
countries are
on the way to
introducing
similar
regulations.
The BEST family
With the right equipment, the EMC tests
most important for product quality can be
carried out in any electronics laboratory.
Self-certification - as required by the law - is
then little more than a matter of logging the
results.
Schaffner has created the BEST family of
instruments to meet this need, costeffectively. Compliance testing with BEST
not only ensures electromagnetic
compatibility to the required standards, but
also guarantees EMC product quality.
BEST is a range of compact bench
instruments that incorporates all six EMC
pulse test procedures in a single housing.
The instruments incorporate all you need to
test and certify your products, in your own
laboratory and with minimal effort.
Test parameters are user-adjustable within
wide limits and offer generous test margins,
so that BEST is also ideal for product
analysis, or for checking compliance with
in-house EMC quality standards.
• Future proof
BEST already meets foreseeable future standards.
Interfaces are designed for future expansion.
• Cost-effective
BEST is designed to suit the needs - and the budget -
of the smaller manufacturer. In larger laboratories,
it helps to relieve pressure on other
high-end installations.
• An all-in-one solution
BEST is an ideal compact, portable test rig for
on-site investigations.
BEST checks interference immunity by
injecting standard-calibrated burst pulses on to
power supply and data lines, and provides
functions to identify weak points.
BEST includes an ergonomically styled ÔpistolÕ
for the simulation of electrostatic discharges.
Like the other test pulses generated by BEST,
test parameters are set up and results are
automatically recorded on the bench-top unit.
BEST checks the equipment being tested with
these energy-rich pulses in a safe, controlled
procedure. Safety connectors and well-designed
interlock circuits protect the operator.
BEST needs no ancillary equipment to perform
these tests. Standard test conditions are
pre-programmed, and functional limits are
easily determined by simply entering particular
test values. For more demanding test scenarios,
an external variac can be used with BEST.
Burst
Burst, or fast transient, pulses are high frequency packets of
spikes that occur during switching operations on power lines
and which spread throughout the supply network. Modern
electronic devices running at ever faster speeds are
vulnerable, particularly if the PCB layout is poor. They tend to
react by functioning incorrectly and/or losing data.
ESD
Electrostatic discharges are familiar as, for example, a small
spark that occurs when a charged person touches a
conductive object. The effect is harmless to the human body,
but can be damaging to microprocessors and logic circuitry.
Surge
Surge pulses take the form of low frequency disturbances
which contain considerable energy. They occur in power
supply networks as a result of a lightning strike or when a
heavy load is switched off, for example. Input circuits and
power supplies for electronic instruments are particularly at
risk from being over-driven or over-loaded.
Transient
Transient power variations occur in the mains supply as,
voltage interruptions or dips, for example. In keeping with
the best engineering practice, and to conform with European
EMC regulations, items of equipment must behave
reasonably in the face of such disruptions.
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