LEAST ONE FREQUENCY CLOSE TO EACH THE FOLLOWING : 45 , 90 , 220 MHZ .
.3 . IF DIFFERENCES OF NOT MORE THAN 2 DB ARE OBSERVED BETWEEN THE LEVELS OF INTERFERENCE AS MEASURED IN .1 AND .2 , FOR THE FREQUENCIES CONCERNED , THE CURVE OBTAINED UNDER .1 SHALL BE ADOPTED . IF THE DIFFERENCES ARE GREATER THAN 2 DB , THE MEASUREMENT SHALL BE REPEATED FOR THE ENTIRE SPECTRUM AND THE HIGHEST LEVEL OF ALL MEASUREMENTS AT EACH FREQUENCY SHALL BE ADOPTED .
6.2 . STANDARDIZED LOADS FOR ELECTRIC MOTOR-OPERATED APPLIANCES
6.2.1 . ELECTRIC MOTOR-OPERATED APPLIANCES FOR HOUSEHOLD AND SIMILAR PURPOSES
. VACUUM CLEANERS : TO BE OPERATED CONTINUOUSLY WITHOUT ACCESSORIES AND WITH MAXIMUM AIR FLOW , BUT WITH DUST BAG IN PLACE .
. FLOOR POLISHERS : TO BE OPERATED CONTINUOUSLY WITHOUT MECHANICAL LOAD ON THE POLISHING BRUSHES .
. SEWING MACHINES :
( A ) CONTINUOUS INTERFERENCE FROM THE MOTOR : THE MOTOR TO BE OPERATED CONTINUOUSLY WITH SEWING MECHANISM IN SITU BUT NOT SEWING A FABRIC . THE REGULATOR MUST BE SET IN THE POSITION FOR MAXIMUM SPEED .
( B ) INTERFERENCE DURING STARTING AND STOPPING : THE SPEED OF THE MOTOR TO BE INCREASED TO MAXIMUM SPEED OVER A FIVE-SECOND PERIOD . FOR STOPPING , THE REGULATOR IS TO BE RESET QUICKLY . TO DETERMINE THE CLICK RATE N , THE PERIOD BETWEEN TWO STARTS SHALL BE 15 SECONDS .
. JUICE EXTRACTORS : AS IN .
. CLOCKS : CONTINUOUS OPERATION .
. FANS : CONTINUOUS OPERATION WITH MAXIMUM AIR FLOW : IF HEATING IS INCORPORATED , THE FAN SHOULD BE TESTED BOTH WITH AND WITHOUT HEATING .
. FOOD MIXERS ( KITCHEN TYPE ) : TO BE OPERATED WITHOUT LOAD AND SET FIRST AT HALF SPEED , THEN AT MAXIMUM SPEED .
. LIQUID MIXERS : AS IN .
. REFRIGERATORS : TO BE OPERATED CONTINUOUSLY WITH DOOR CLOSED . THE THERMOSTAT TO BE SET TO THE MIDDLE OF THE RANGE . THE CABINET SHALL BE EMPTY AND NOT HEATED . MEASUREMENT IS MADE WHEN THE STEADY STATE HAS BEEN REACHED .
THE CLICK RATE N IS CALCULATED ON THE BASIS OF HALF THE NUMBER OF SWITCHING OPERATIONS PER HOUR .
. WASHING MACHINES : TO BE OPERATED WITH WATER BUT WITHOUT WASHING . WHEN A THERMOSTAT IS FITTED IT MUST BE ADJUSTED TO THE MAXIMUM SETTING OR TO 90 C WHICHEVER IS LOWER . THE PROGRAMME SHOULD BE SET TO PRODUCE THE HIGHEST VALUE FOR N .
. SPIN DRYERS : TO BE TESTED IN CONTINUOUS OPERATION WITHOUT LOAD .
. DISH-WASHING MACHINES : AS IN .
. HAIR DRYERS : AS IN .
. SHAVERS AND HAIR CLIPPERS : TO BE TESTED IN CONTINUOUS OPERATION WITHOUT LOAD FOR NOT MORE THAN 10 MINUTES .
. MASSAGE APPLIANCES : TO BE TESTED IN CONTINUOUS OPERATION WITHOUT LOAD .
.