Standards
EU standard 55011
(CISPR11)
As/NZ standard 2064.1/2
Limits and methods of measurement of radio disturbance characteristics of industrial, scientific and medical (ISM) radio-frequency equipment.
The limits and methods of measurement laid down in this publication apply
to industrial, scientific and medical (ISM) equipment and to spark erosion
equipment.
ISM qualifies equipment or appliances designed to generate and/or use
locally generated radio frequency energy for industrial, scientific, medical,
domestic or similar purposes, excluding applications in the field of telecoms
and information technology and other applications covered by other CENELEC
EMC Standards.
The equipment shall be labelled and tested according to the following
Class and Group designation:
Group 1 ISM equipment: All ISM equipment in which radio frequency
energy is intentionally generated and/or used conductive coupled which
is necessary for the internal functioning of the equipment itself.
Group 2 ISM equipment: All ISM equipment in which radio frequency
energy is intentionally generated and/or used in the form of electromagnetic
radiation for the treatment of metal, and spark erosion equipment.
Class A equipment is equipment suitable for use in all establishments
other than domestic and those directly connected to a low voltage power
supply network which supplies buildings for domestic purposes.
Class B equipment is equipment suitable for use in domestic establishments
and in establishments directly connected to a low voltage power supply
network which supplies buildings used for domestic purposes.
Radiated:
Requires the use of a broadband antenna to measure the level of RF energy radiated from the product into ‘space’. Ideally an Open Area Test Site (OATS) or equivalent should be used. Uncalibrated test sites will require the use of an ERS to quantify test site distortion. Frequency range 30MHz to 1000MHz.
Conducted:
The RF conducted back down the mains lead is measured preferably with a LISN (Line Impedance Stabilisation Network), or alternatively with a voltage probe if a LISN is not suitable, and from other terminals with a voltage probe. Frequency range 150KHz to 30MHz.
The signals from the antenna, LISN or voltage probe are all analysed in a CISPR16 EMC analyser.
The complete basic kit to cover both radiated and conducted emissions
measurement in accordance with the standard, including a 16A single phase
LISN and RF200 broadband antenna and ERS (emissions reference source to
calibrate the test site. ...RFG-4BC
A comprehensive range of alternative LISNs for up to 150A rating and 3
phases are available. If applicable, a voltage probe can be supplied in
place of the LISN. ...RFG-5BC
Recommended option: RF910 pre-selector. Essential if the EUT generates
broadband noise (e.g. variable speed motors, motors with commutators,
power controllers, phase angle controllers) ...add -R
RF200 broadband antenna
ERS
LISN
Voltage probe (PLIP)
RF910 automatic pre-selector
RF800 Band B filter
|
|
||
|
LAPLACE INSTRUMENTS LTD |
Tel: + 44 (0)1263 515160 Fax: + 44 (0)1263 512532 E-mail:tech@laplace.co.uk |
|
|
|
||
