National Measurement System Act 2007 Second Schedule

Second Schedule SECOND SCHEDULESupplementary

[Subsection 4(3)] Other permissible units of measurement PART 1 Units accepted internationally for use with the International System of Units (SI): Name Symbol Value in SI units minute min 1 min = 60 s hour h 1 h = 60 min = 3600 s day d 1 d = 24 h = 86 400 s degree º 1º = ( / /180) rad , minute 1’ = (1/60)° = ( / /10 800) rad ,, second 1’’ = (1/60)’ = ( / /648 000) rad litre l, L 1 l = 1 dm3 = 10-3 m3 tonne t 1 t = 103 kg neper Np 1 Np = 1 bel B 1 B = (1/2) In 10 (Np) PART 2 Units accepted for use with the International System of Units (SI), whose values in SI units are obtained experimentally— Name Symbol Value in SI Units Note electronvolt eV 1 eV = 1.602 17653 (14) x 10-19 J (a) XQLÀHGDWRPLFPDVV u 1 u = 1.660 53886 (28) x (10) -27 kg (b) unit astronomical unit ua 1 ua = 1.495 978 706 91 (6) x 1011 m (c) (a) The electronvolt is the kinetic energy acquired by an electron in passing through a potential difference of 1 V in vacuum6 (b) The unified atomic mass unit is equal to 1/12 of the mass of an unbound atom of the nuclide 12C, at rest and in its ground state. The unified atomic mass unit is also called the dalton (Da), in the field of biochemistry. (c) The astronomical unit is a unit of length; it is approximately equal to the mean Earth-Sun distance. Its value is such that, when used to describe the motion of bodies in the solar system, the heliocentric gravitational constant is (0.017 207 098 95)2 ua3 . d-2. PART 3 Units of measurement and denominations which may be used temporarily: Name Symbol Value 1. Area barn b 1 b = 100 fm2 = 10-28 m2 Its use is authorized only in atomic and nuclear physics. 2. Dynamic viscosity poise P 1 P = 0.1 Pa . s = 10-1 Pa . s centipoises cP 1 cP = 1 mPa . s = 10-3 Pa . s 3. Kinematic viscosity stokes St 1 St = 100 mm2/s = 10-4 m2/s centistokes cSt 1 cSt = 1 mm2/s = 10-6 m2/s 4. Activity (of a radioactive source) curie and the multiples and Ci 1 Ci = 37 GBq = 3.7 x 1010 Bq sub-multiples of the curie 5. Absorbed dose rad and the multiples and rad 1 rad = 0.01 Gy = 10-2 Gy submultiples of the rad Name Symbol Value 6. Exposure röntgen and the multiples R 1 R = 0.258 mC/kg = 2.58 x 10-4 C/kg and submultiples of the röntgen 7. Pressure millimetre of mercury mmHg 1 mmHg = 133.322 Pa (Its use is authorized only in specialized fields) bar and the multiples and submultiples of the bar bar 1 bar = 100 kPa = 105 Pa 8. Plane angle revolution (turn) R  U  › UDG 9. Vergency of optical systems diopter 1 diopter = 1 m-1 10. Area of farmland and estates are a 1 a = 100 m2 = 102 m2 hectare ha 1 ha = 0.01 km2 = 104 m2 11. Metric carat metric carat (Its use is authorized only ct 1 ct = 0.2 g = 2 x 10-4 kg for indicating the mass of pearls and precious stones) Name Symbol Value 12. Length ångström Å 1 Å = 0.1 nm = 10-10 m nautical mile 1 nautical mile = 1852 m knot 1 nautical mile per hour = (1852/3600) m/s 13. Volume (forestry management and timber trade) stere st 1 st = 1 m3 14. Mass quintal q 1 q = 100 kg = 102 kg 15. Force kilogram-force kgf 1 kgf = 1 kp = 9.806 65 N kilopond kp and its decimal multiples and submultiples 16. Pressure standard atmosphere atm 1 atm = 101.325 kPa = 1.013 25 x 105 Pa technical atmosphere at 1 at = 98.066 5 kPa = 0.980 665 x 105 Pa torr Torr 1 Torr = 101 325 Pa metre of water mH2O 1 mH2 O = 9.806 65 kPa = 9.806 65 x 103 Pa Name Symbol Value 17. Work, energy, quantity of heat kilogram force metre = kgf . m 1kgf . m=1kp . m=9.80665J kilopond metre kp . m calorie cal 1 cal = 4.186 8 J and its decimal multiples and submultiples 18. Power metric horsepower (cheval- 1 metric horsepower = vapeur) 0.735 498 75 kW=735.498 75W 19. Luminance stilb sb 1 sb = 10 kcd/m2 = 104 cd/m2