GIVE MAXIMUM INDICATION ON THE MEASURING APPARATUS AT EACH FREQUENCY .
5.1.2 . ELECTRIC FENCE SUPPLY UNITS
THE UNIT UNDER TEST SHALL BE SET UP IN ACCORDANCE WITH FIGURE 4 , THE FENCE BEING REPLACED BY A CIRCUIT HAVING A 300 OHMS RESISTANCE IN SERIES WITH A 10 NF CAPACITANCE ( RATED VOLTAGE 10 KV DC . ) .
THE EARTH TERMINAL OF THE FENCE CIRCUIT SHALL BE CONNECTED TO THE EARTH TERMINAL OF THE ARTIFICIAL MAINS V-NETWORK . IF THE TERMINALS OF THE FENCE CIRCUIT ARE NOT CLEARLY MARKED THEY SHALL EACH BE EARTHED IN TURN .
ELECTRIC FENCE SUPPLY UNITS DESIGNED TO OPERATE ON AC OR DC SHALL BE TESTED WITH BOTH KINDS OF CURRENT .
IF THE CONNECTING DEVICE OF THE CURRENT SOURCE DOES NOT PROVIDE A FIXED POLARITY , TESTS SHALL BE MADE WITH BOTH POLARITIES .
THE INTERFERENCE VOLTAGE SHALL BE MEASURED AT TERMINALS A , B AND C OF THE CIRCUIT SHOWN IN FIGURE 4 , THE APPLIANCE BEING IN ITS NORMAL POSITION , WITH A MAXIMUM INCLINATION OF 15 * FROM THE VERTICAL , AND THE CONTROLS ACCESSIBLE WITHOUT TOOLS SET TO THE POSITIONS OF MAXIMUM INTERFERENCE .
5.2 . FREQUENCY RANGE 30 TO 300 MHZ
THE MEASURING APPARATUS SHALL COMPLY WITH CISPR PUBLICATION 2 " SPECIFICATION FOR CISPR RADIO INTERFERENCE MEASURING APPARATUS FOR THE FREQUENCY RANGE 25 MHZ TO 300 MHZ " ( 1961 ) AND AMENDMENT N 1 ( 1969 ) .
5.3 . DISCONTINUOUS INTERFERENCE MEASURING APPARATUS SHALL COMPLY WITH CISPR RECOMMENDATION 41 ( 1970 ) " AUTOMATIC ASSESSMENT OF INTERFERENCE PRODUCED BY SWITCHING OPERATIONS " .
OTHER METHODS SHALL BE ALLOWED IF THEY YIELD THE SAME RESULTS WITH THE SAME DEGREE OF ACCURACY .
5.4 . MEASUREMENT OF THE DURATION OF DISTURBANCES SHORTER THAN 10 MS
IT IS NECESSARY TO DETERMINE THE DURATION OF THE DISTURBANCES CAUSED BY THE THERMOSTATS OF APPLIANCES REFERRED TO IN HAVING INSTANTANEOUS SWITCHING . THIS DURATION MAY BE DETERMINED IN THE FOLLOWING MANNER : THE APPLIANCE TO BE TESTED IS CONNECTED TO A CISPR ARTIFICIAL MAINS V-NETWORK . IF A CISPR METER IS AVAILABLE , IT IS CONNECTED TO THE V-NETWORK AND A CATHODE-RAY OSCILLOSCOPE IS CONNECTED TO THE I . F . OUTPUT OF THE CISPR METER . IF A CISPR METER IS NOT AVAILABLE , THE OSCILLOSCOPE IS CONNECTED DIRECTLY TO THE V-NETWORK . THE TIME BASE OF THE OSCILLOSCOPE CAN BE STARTED BY THE DISTURBANCES TO BE TESTED ; THE VELOCITY OF THE TIME BASE IS SET TO A VALUE OF 1-10 MS / CM . THE PHENOMENA CAN EITHER BE RECORDED ON THE SCREEN OF A STORAGE OSCILLOSCOPE OR A PHOTOGRAPH CAN BE MADE , THUS ENABLING THE TIME DURATION TO BE MEASURED .
6 . OPERATING CONDITIONS FOR APPLIANCES DURING TESTS
6.1 . CONDITIONS AND DURATION OF OPERATIONS AND INTERPRETATION OF RESULTS
6.1.1 . THE APPLIANCE IS TO BE OPERATED UNDER THE FOLLOWING CONDITIONS :
. THE LOAD SHALL BE AS DEFINED IN 6.2 , AND 6.3