National Measurement Amendment Guidelines 2004 (No. 1)

National Measurement Amendment Guidelines 2004 (No. 1)

The National Standards Commission makes these Guidelines under section 7B of the National Measurement Act 1960.

Dated 9 June 2004

J. M. BENNETT

Executive Director

National Standards Commission

1 Name of Guidelines

  These Guidelines are the National Measurement Amendment Guidelines 2004 (No. 1).

2 Commencement

  These Guidelines commence on 1 July 2004.

3 Amendment of National Measurement Guidelines 1999

  Schedule 1 amends the National Measurement Guidelines 1999.

Schedule 1 Amendments

(section 3)

[1] Reader’s guide, Australian legal units of measurement, second paragraph, paragraphs (b), (c) and (d)

substitute

 (b) a unit of measurement derived by the application of guidelines issued by the Chief Metrologist under subsection 7B (1), or 2 or more successive applications of those guidelines.

[2] Paragraph 3 (b)

omit

an Australian legal unit

insert

Australian legal units

[3] Section 5, including the note

substitute

5 Physical quantities

  Australian legal units of measurement may be formed only for the following physical quantities:

  absorbed dose, absorbed dose index, kerma and specific energy imparted (ionising radiation)

  absorbed dose rate (ionising radiation)

  acceleration

  activity of radioactive nuclides

  amount of substance

  apparent energy

  apparent power

  area

  catalytic activity

  concentration of protein in grains (weight/weight)

  current  density

  density

  dose equivalent and dose equivalent index (ionising radiation)

  electric capacitance

  electric charge

  electric conductance

  electric current

  electric field strength

  electric inductance

  electric resistance

  energy

  exposure to ionising radiation

  exposure rate

  flow rate

  force

  frequency

  illuminance

  kinematic viscosity

  length

  luminance

  luminous flux

  luminous intensity

  magnetic field strength

  magnetic flux

  magnetic flux density

  magnetic permeability

  mass

  permittivity

  plane angle

  position

  potential difference (and electromotive force)

  power

  power density

  pressure

  reactive energy

  reactive power

  sound intensity level

  sound power level

  sound pressure level

  specific energy absorption

  specific energy absorption rate

  temperature

  time

  velocity and speed

  viscosity

  volume

  work.

Note   Position is defined in terms of a group of 3 coordinates.  The Australian Fiducial Network has been determined under subsection 8A (1) of the Act as a recognised-value standard of position by the Commission at the request of the Inter-Government Committee on Surveying Measurements.

[4] Section 10, example

omit

para (d).

insert

paragraph (b).

[5] Subsection 11 (10), example 1

omit

insert

[6] After subsection 11 (10)

insert

 (11) A space must be left after the numerical value of an Australian legal unit of measurement and before the name or symbol of the unit of measurement.

Examples

1   22 m, but not 22m.

2   27 volts, but not 27volts.

3   15 ºC, but not 15ºC.

Note 1   When expressing temperature in degrees Celsius, a space must not be left between the symbol for degrees and the symbol for Celsius.  See example 3.

Note 2   When expressing a percentage in relation to an Australian legal unit of measurement, a space must not be left between the number and the symbol for percentage: eg 25%, but not 25 %.