AS/NZS 1044:1995

1 - AS/NZS 1044:1995 LIMITS AND METHODS OF MEASUREMENT OF RADIO DISTURBANCE CHARACTERISTICS OF ELECTRICAL MOTOR-OPERATED AND ....
4 - PREFACE
5 - CONTENTS
7 - 1 Scope
8 - 2 Normative references
8 - 3 Definitions
9 - 3.2 click:
9 - 3.3 switching operation:
9 - 3.4 minimum observation time T:
9 - 3.5 click rate N:
9 - 3.6 click limit L q :
9 - 3.7 upper quartile method:
9 - 4 Limits of disturbance
9 - 4.1 Continuous disturbance
14 - 4.2 Discontinuous disturbance
17 - 5 Methods of measurement of terminal disturbance voltages (148,5 kHz to 30 MHz)
17 - 5.1 Measuring devices
18 - 5.2 Measuring procedures and arrangements
22 - 5.3 Reduction of disturbance not produced by the equipment under test
23 - 6 Methods of measurement of disturbance power (30 MHz to 300 MHz)
23 - 6.1 Measuring devices
23 - 6.2 Measurement procedure on the mains lead
24 - 6.3 Special requirements for appliances having auxiliary apparatus connected at the end of a lead other than the mains lead
25 - 6.4 Assessment of measuring results
25 - 7 Operating conditions and interpretation of results
25 - 7.1 General
26 - 7.2 Operating conditions for particular equipment and integrated parts
29 - 7.3 Standard operating conditions and normal loads
45 - 7.4 Interpretation of results
48 - 8 Interpretation of CISPR radio disturbance limit
48 - 8.1 Significance of a CISPR limit
48 - 8.2 Type tests
49 - 8.3 Compliance with limits for appliances in large-scale production
60 - Annex A - Limits of disturbance caused by the switching operations of specific appliances when the formula 20 Ig 30/ Nis applica
62 - Annex B - Example of the use of the upper quartile method to determine compliance with disturbance limits (see 7.4.2.6)
64 - Annex C - Guidance notes for the measurement of discontinuous disturbance
64 - C.1 General
66 - C.2 Measurement of the basic parameters
67 - C.3 Measurement of discontinuous disturbance

Specifies limits and methods of measurement of electromagnetic radiation and conduction disturbances from household appliances and electric tools whose main functions are performed by electric motors and switching or regulating devices. It is identical with and reproduced from IEC/CISPR 14:1993.

This standard applies to the conduction and the radiation of radio-frequency disturbances from appliances whose main functions are performed by motors and switching or regulating devices, unless the r.f. energy is intentionally generated or intended for illumination.It includes such equipment as: household electrical appliances, electric tools, regulating controls using semiconductor devices, motor-drivenelectro-medical apparatus,electric toys, automatic dispensing machines as well as cine or slide projectors.Also included in the scope of this standard are:- separate parts of the above mentioned equipment such as motors, switching devices e.g. (power or protective) relays, however no emission requirements apply unless formulated in this standard.This standard gives for the time being no requirements for apparatus that cannot be measured on a test site; requirements for in situ measurements are under consideration.Requirements concerning immunity are under consideration.Excluded from the scope of this standard are:- apparatus for which all emission requirements in the radio frequency range are explicitly formulated in other IEC or CISPR standards;NOTE - Examples are:- Luminaires, discharge lamps and other lighting devices: CISPR 15;- Audio and video equipment and electronic music instruments: CISPR 13 and 20 (see also 7.3.5.4.2);- Mains communication devices: IEC XX (to be published);- Equipment for generating and use of radio frequency energy for heating and therapeutic purposes:CISPR 11;- Microwave ovens: CISPR 11 (but be aware of subclause 1.3 on multifunction equipment);- Information technology equipment, e.g. home computers, personal computers: CISPR 22;- Electric equipment to be used on motor vehicles: CISPR 12.- regulating controls and equipment with regulating controls incorporating semiconductor devices with a rated input current of more than 25 A per phase;- stand-alone power supplies.The frequency range covered is 9 kHz to 400 GHz.Multifunction equipment which is subjected simultaneously to different clauses of this standard and/or other standards shall meet the provisions of each clause/standard with the relevant functions in operation; details are given in 7.2.1.The limits in this standard have been determined on a probabilistic basis, to keep the suppression of disturbances economically feasible while still achieving an adequate radio protection. In exceptional cases radio frequency interference may occur, in spite of compliance with the limits. In such a case, additionalprovisions may be required.

First published in Australia as AS C321-1959.
Revised and redesignated AS 1044-1973.
Second edition 1990.
Revised and designated as Joint Standard AS/NZS 1044:1992.
Second edition 1995.