Statutory Rules 1983 No. 641
Weights and Measures (National Standards) Regulations2 (Amendment)
I, THE GOVERNOR-GENERAL of the Commonwealth of Australia, acting with the advice of the Federal Executive Council, hereby make the following Regulations under the Weights and Measures (National Standards) Act 1960.
Dated 17 May 1983.
N. M. STEPHEN
Governor-General
By His Excellency's Command,
(sgd) Barry Jones
Minister of State for Science and Technology
The candela
1. Regulation 56 of the Weights and Measures (National Standards) Regulations is repealed and the following regulation substituted:
“56. The candela is the luminous intensity, in a given direction, of a source that emits monochromatic radiation of the frequency 540 x 1012 hertz and has a radiant intensity in that direction of 
watt per steradian.”.
2. After Division 30 of Part II of the Weights and Measures (National Standards) Regulations the following Divisions are inserted:
“Division 31—Magnetic flux
Units of measurement of magnetic flux
“69. (1) The units of measurement of magnetic flux are the units specified in column 2 of Schedule 30a.
“(2) A unit of measurement specified in an item in Schedule 30a is related to the weber as specified in column 3 of that Schedule in that item.
“(3) A unit of measurement specified in an item in Schedule 30a may be referred to by the symbol specified in column 4 of that Schedule in that item.
S.R.20/83 Cat. No. Recommended retail price 20c 10/11.2.1983
The weber
“70. The weber is the magnetic flux that, linking a circuit of one turn, produces in that circuit an electromotive force of 1 volt if the magnetic flux is reduced to zero at a uniform rate in 1 second.
“Division 32—Magnetic flux density
Units of measurement of magnetic flux density
“71. (1) The unit of measurement of magnetic flux density are the units specified in column 2 of Schedule 30b.
“(2) A unit of measurement specified in an item in Schedule 30b is related to the tesla as specified in column 3 of that Schedule in that item.
“(3) A unit of measurement specified in an item in Schedule 30b may be referred to by the symbol specified in column 4 of that Schedule in that item.
The tesla
“72. The tesla is the magnetic flux density that results if a magnetic flux of 1 weber is uniformly distributed over a plane 1 square metre in area, the direction of the magnetic flux density being perpendicular to that plane.”.
Prescribed amount for the purposes of sub-section 18a (4) of the Act
3. Regulation 84 of the Weights and Measures (National Standards) Regulations is amended by omitting “$32,227” and substituting “$40,499”.
Schedule 2
4. Schedule 2 to the Weights and Measures (National Standards) Regulations is amended by omitting from column 3 in item 1 “108” and substituting “106”.
Schedule 8
5. Schedule 8 to the Weights and Measures (National Standards) Regulations is repealed and the following Schedule substituted:
“SCHEDULE 8 Regulation 22
UNITS OF MEASUREMENT OF FREQUENCY
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Frequency in hertz | Symbol |
1 | terahertz ................................ | 1012 | THz |
2 | gigahertz ............................... | 109 | GHz |
3 | megahertz ............................... | 106 | MHz |
4 | kilohertz ................................ | 103 | kHz |
5 | Hertz.................................. | 1 | Hz |
6 | millihertz ............................... | 10-3 | mHz |
7 | revolution per minute....................... | 1/60 | r/min |
8 | revolution per second ....................... | 1 | r/s”. |
Schedule 13
6. Schedule 13 to the Weights and Measures (National Standards) Regulations is amended by omitting item 7 and substituting the following items:
“7 | nanowatt ...................................... | 109 | nW |
8 | picowatt....................................... | 10-12 | pW |
9 | horsepower..................................... | 745.7 | hp”. |
Schedule 14
7. Schedule 14 to the Weights and Measures (National Standards) Regulations is amended by omitting items 5 and 6 and substituting the following items:
“5 | millipascal................................... | 10-3 | mPa |
6 | micropascal.................................. | 10-6 | μPa |
7 | millibar..................................... | 100 | mb or mbar |
8 | millimetre of mercury........................... | 133.322 19 | mmHg”. |
Insertion of Schedules 30a and 30b
8. After Schedule 30 to the Weights and Measures (National Standards) Regulations the following Schedules are inserted:
“SCHEDULE 30a Regulation 69
UNITS OF MEASUREMENT OF MAGNETIC FLUX
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Magnetic flux in webers | Symbol |
1 | weber................................... | 1 | Wb |
2 | milliweber................................ | 10-3 | mWb |
3 | microweber............................... | 10-6 | μWb |
“SCHEDULE 30b Regulation 71
UNITS OF MEASUREMENT OF MAGNETIC FLUX DENSITY
Column 1 | Column 2 | Column 3 | Column 4 |
Item | Name of unit | Magnetic flux density in teslas | Symbol |
1 | tesla.................................... | 1 | T |
2 | millitesla................................. | 10-3 | mT |
3 | microtesla................................ | 106 | μT |
4 | nanotesla................................. | 10-9 | nT”. |
NOTES
1. Notified in the Commonwealth of Australia Gazette on 24 May 1983.
2. Statutory Rules 1961 No. 142 as amended by 1963 No. 126; 1964 No. 146; 1965 No. 13; 1968 No. 150; 1970 No. 40; 1972 Nos. 62, 133 and 160; 1973 Nos. 68 and 253; 1977 No. 150; 1979 No. 65; 1981 No. 195.
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