GROUPINGS
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Section
500 Content Consideration
WARNING Many of the
items in this Section are designed to operate at high, possibly LETHAL voltages
and energy levels, create sudden audible discharges and require a high degree
of responsibility, care and commonsense in their use. Normal high voltage safety practices MUST be
exercised when using this equipment.
Untrained operators, wearers of electronic life support equipment (pace-makers etc), personnel with heart problems, nervous disorders and similar problems should not be allowed to operate these items or be present during their use.
Under
the sub section Signal Generators, sweepers & Noise sources
the signal generators can be divided into the synthesized devices (whose
frequency is generally very stable & as accurate as the generator’s
own clock) and the older analogue devices with for example cavity oscillators.
These older cavity devices although characterized by offering a relatively
short frequency span produce a pure single frequency without numerous spurious
signals. They also enable the operator to simultaneously adjust the frequency
& level. This, with a non-computerised immunity system can be an advantage.
Nearly all the digital generators are under bus control. Included in this
sub section are impulse generators whose pulse rise time allows a signal
to be observed up to a Gigahertz on all peak detector analysers. For the
low frequencies items 501 & 502 provide a couple of function generators.
There are also selections of white noise sources under the York CNE group.
These will give a continuous white noise spectrum of signal up to 1 or 2GHz.
A couple of low frequency power sweepers and oscillators have been included
within this section. When considering any of the microwave generators they
can be delivered with the appropriate output connector suited to their range
of operation,. i.e. precision N or K. Please specify to the hire department
when ordering. There are a range of microwave cables and adaptors in section
700 to assist in systemizing the set-up.
Sub section Harmonic
& Flicker, Transient, Burst & Surge generation
embraces a wide range of Schaffner LF immunity testing equipment along with
the Laplace AC2000. e.g. the harmonic & flicker test apparatus for 61000-3-2/3.
The Schaffner units mainly cover “Surge & interrupt”, “fast transient/
burst generation”& “Data line interference simulation” tests.
Coupling De-coupling Networks from the Richard Marshall Company. These are prefixed with RML-S46XXX
and come with their own Cal jig, a full set of I/O cables to match the design
of the CDN, earthing lead and ground plane. A more detailed write up on
these is included within the general catalogue or web site. There are also
the Schaffner range of CDNs which are matched to some of the Schaffner generators
listed within the section. As a supplement to the above groups a further
three CDN’s are available from MEB which is now part of the Schaffner group.
Look at the web site for details on CDNs.
Sub section ESD,
Transient & Surge mainly
with laptop & s/w contains many of the Haefely designs very similar to the Schaffner
group, covering such functions as “burst testing”, “mains surge generation”
& “interference simulation”. It is within this sub section that the
ESD guns from various manufacturers have been listed. Although the Haefely
units can be operated from the front panel, laptops are offered with the
winpats software installed ready for use.
Sub section Modular units
embracing ESD & generally 61000-4-x are available under Items 581 (UCS-500-M) and 582 (CWS 500). These
are new to the list and makes an attractive economic alternative to many
of the separated items offered above especially conducted immunity. The
CWS 500 puts a signal generator, a power amplifier & a power meter plus
coupler all in one box. It embraces testing to standards IEC61000-4-6/ENV
50141. The output power from the amplifier within is approx 75Watts. The
customer then adds the appropriate CDN, 6dB pad & 50 Ohm load to complete
the working passage. Similarly, the UCS-500M does numerous tests from EN61000-4-2
/4/8/9/11/12/29 and all contained within one single box. Many of the low
frequency test systems have software to enhance or speed up the test. This
can be added by choosing a sub-item, i.e.item 581E.