Decree No. 134/2007/ND-CP dated August 15, 2007 of the Government providing for official units of measurement

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ATTRIBUTE

Decree No. 134/2007/ND-CP dated August 15, 2007 of the Government providing for official units of measurement
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Official number:134/2007/ND-CPSigner:Nguyen Tan Dung
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THE GOVERNMENT
--------

SOCIALIST REPUBLIC OF VIETNAM
Independence - Freedom - Happiness
---------------

No. 134/2007/ND-CP

Hanoi, August 15, 2007

 

DECREE

PROVIDING FOR OFFICIAL UNITS OF MEASUREMENT

THE GOVERNMENT

Pursuant to the Law on Government organization dated December 25, 2001;

Pursuant to the Ordinance on Measurement dated October 06, 1999;

At the request of the Minister of Science and Technology,

DECREES:

Chapter 1:

GENERAL PROVISIONS

Article 1. Scope of regulation

This Decree providing official measurement units regulated by the Socialist Republic of Vietnam.

Article 2. Interpretation of terms

In this Decree, these terms can be construed as follows:

1. The SI system is the international system of units (in French: Le Système International d Unités; in English: The International System of Units).

2. Official measurement units are the units specified in Article 7 and Article 8 of this Decree.

3. Other common measurement units are the units that are not mentioned in clause 2 of this Article, including traditional units and other measurement units.

Article 3. Rules for the use of measurement units

1. Official measurement units are compulsory in these following cases:

a) In the documents promulgated by a regulatory agency, except for the application of International Agreement as prescribed in Article 5 of this Decree;

b) On the measurement instruments used for the examination, inspection and other public services;

c) On the labels of quantitatively prepackaged products subject to examination according to the regulations in the Ordinance on Measurement;

d) In the manufacture, trade, import of measurement instruments subject to examination according to the Ordinance on Measurement.

2. Other common measurement units may be used in the activities other than the cases specified in clause 1 of this Article.

The conversion from a common measurement unit into an official measurement unit is expressed according to Article 4 of this Decree.

3. The state shall encourage organizations and individuals to use the official measurement units according to the regulations in this Decree.

Article 4. The conversion from the common units into the official measurement units

1. The conversion shall not lead to any change in the value of quantity.

2. The conversions from other common measurement units into official measurement units are regulated in Annex I enclosed herewith.

If a conversion from a common measurement unit into an official measurement unit is not specified in Annex I of this Decree, then the equivalent of the traditional measurement units shall be used in accordance with the Encyclopaedic Dictionary of Vietnam, the equivalent of other common measurement shall be in accordance with The International System of Units (SI) – 8th edition, 2006 by the Bureau International des Poids et Mesures (BIPM).

3. When expressing the values, the common quantities, values and units shall go after the official ones and shall be put in the brackets.

Ex: One (01) tael of gold shall be expressed as follow: 37,5 g (1 tael).

Article 5. The application of the International Agreement

If the Socialist Republic of Vietnam accedes an International Agreement on measurement units whose regulation is different from this Circular, such International Agreement shall prevail.

Article 6. The expression of official measurement units

The expression of measurement results, the conversion from a common measurement unit into an official measurement unit shall be in accordance with the regulation in Annex II enclosed herewith.

Chapter 2:

THE OFFICIAL MEASUREMENT UNITS

Article 7. The SI units

The SI units include:

1. SI base units specified in Table 1.

Table 1

No.

Quantity

Unit name

Unit symbol

1

length

metre

m

2

mass

kilogram

kg

3

time

second

s

4

electric current

ampere

A

5

thermodynamic temperature

kelvin

K

6

amount of substance

mole

mol

7

luminous intensity

candela

cd

2. The derived units specified in table 2.

Table 2

No.

Quantity

Unit

Expression in terms of SI base units

Name

Symbol

1. Units of space, time and the circulation

1.1   

plane angle (angle)

radian

rad

m/m

1.2   

solid angle

steradian

sr

m2/m2

1.3   

area

square metre

m2

m.m

1.4   

volume

cubic metre

m3

m.m.m

1.5   

frequency

hertz

Hz

s-1

1.6   

angular velocity

radian per second

rad/s

s-1

1.7   

angular acceleration

radian per second squared

rad/s2

s-2

1.8   

speed

metre per second

m/s

m.s-1

1.9   

acceleration

metre per second squared

m/s2

m.s-2

2. Mechanical units

2.1   

linear mass density (linear density)

kilogram per metre

kg/m

kg.m-1

2.2   

area density (surface density)

kilogram per square metre

kg/m2

kg.m-2

2.3   

mass density (density)

kilogram per cubic metre

kg/m3

kg.m-3

2.4   

force

newton

N

m.kg.s-2

2.5   

torque (moment of force)

newton metre

N.m

m2.kg.s-2

2.6   

pressure, stress

pascal

Pa

m-1.kg.s-2

2.7   

dynamic viscosity

pascal second

Pa×s

m-1.kg.s-1

2.8   

kinematic viscosity

square metre per second

m2/s

m2.s-1

2.9   

work, engergy

joule

J

m2.kg.s-2

2.10 

power

watt

W

m2.kg.s-3

2.11 

volumetric flow

cubic metre per second

m3/s

m3.s-1

2.12 

mass flow

kilogram per second

kg/s

kg.s-1

3. Units for the measurement of temperature

3.1   

degree Celsius

degree Celsius

°C

t = T - T0; where t is degree Celsius, T is thermodynamic temperature and T0= 273,15.

3.2   

calorific value

joule

J

m2.kg.s-2

3.3   

specific energy

joule per kilogram

J/kg

m2.s-2

3.4   

heat capacity

joule per kelvin

J/K

m2.kg.s-2.K-1

3.5   

specific heat capacity

joule per kilogram kelvin

J/(kg×K)

m2.s-2.K-1

3.6   

heat flux

watt

W

m2.kg.s-3

3.7   

surface heat flux (heat flux density)

watt per square metre

W/m2

kg.s-3

3.8   

thermal transmittance

watt per square metre kelvin

W/m2×K

kg.s-3.K-1

3.9   

thermal conductivity

watt per metre kelvin

W/(m×K)

m.kg.s-3.K-1

3.10 

thermal diffusivity

square metre per second

m2/s

m2.s-1

4. Units for the measurement of electric and magnetic

4.1   

quantity of electricity (electric charge)

coulomb

C

s.A

4.2   

voltage, electrical potential difference, electromotive force

volt

V

m2.kg.s-3.A-1

4.3   

electric field strength

volt per metre

V/m

m.kg.s-3.A-1

4.4   

electrical resistance

ohm

W

m2.kg.s-3.A-2

4.5   

electrical conductance

siemens

S

m-2.kg-1.s3.A2

4.6   

electric flux

coulomb

C

s.A

4.7   

electric flux density

coulomb per square metre

C/m2

m-2.s.A

4.8   

work, energy

joule

J

m2.kg.s-2

4.9   

magnetic field strength

ampere per metre

A/m

m-1.A

4.10 

electrical capacitance

farad

F

m-2.kg-1.s4.A2

4.11 

inductance

henry

H

m2.kg.s-2.A-2

4.12 

magnetic flux

weber

Wb

m2.kg.s-2.A-1

4.13 

magnetic flux density, magnetic induction

tesla

T

kg.s-2.A-1

4.14 

magnetomotive force

ampere

A

A

4.15 

power

watt

W

m2.kg.s-3

4.16 

apparent power

volt ampere

V.A

m2.kg.s-3

4.17 

reactive power

var

var

m2.kg.s-3

5. Units for the measurement of light and electromagnetic radiation

5.1   

radiant energy

joule

J

m2.kg.s-2

5.2   

radiant power (radiant flux)

watt

W

m2.kg.s-3

5.3   

radiant intensity

watt per steradian

W/sr

m2.kg.s-3

5.4   

spectral radiance

watt per steradian square metre

W/(sr×m2)

kg.s-3

5.5   

radiant emittance

watt per square metre

W/m2

kg.s-3

5.6   

irradiance

watt per square metre

W/m2

kg.s-3

5.7   

luminance

candela per square metre

cd/m2

m-2.cd

5.8   

luminous flux

lumen

lm

cd

5.9   

luminous energy

lumen second

lm×s

cd.s

5.10 

luminous emittance

lumen per square metre

lm/m2

m-2.cd

5.11 

illuminance

lux

lx

m-2.cd

5.12 

luminous exposure

lux second

lx×s

m-2.cd.s

5.13 

optical power

diopter

diopter

m-1

6. Measurement units of sound

6.1   

sound frequency

hertz

Hz

s-1

6.2   

sound pressure

pascal

Pa

m-1.kg.s-2

6.3   

speed of sound

metre per second

m/s

m.s-1

6.4   

sound energy density

joule per cubic metre

J/m3

m-1.kg.s-2

6.5   

sound energy

watt

W

m2.kg.s-3

6.6   

sound intensity

watt per square metre

W/m2

kg.s-3

6.7   

acoustic impedance

pascal second per cubic metre

Pa×s/m3

m-4.kg.s-1

6.8   

viscous damping

newton second per cubic metre

N×s/m

kg.s-1

7. Units for the mesurement of physical and chemical molecule

7.1   

atomic mass

kilogram

kg

kg

7.2   

molecular mass

kilogram

kg

kg

7.3   

molar concentration

mole per cubic metre

mol/m3

kg

7.4   

molar energy

joule per mole

J/mol

m-3.mol

7.5   

catalytic activity

katal

kat

m2.kg.s-2.mol-1

8. Measurement units of ionizing radiation

8.1   

radioactivity (activity)

becquerel

Bq

s-1

8.2   

absorbed dose, kerma

gray

Gy

m2.s-2

8.3   

dose equivalent

sievert

Sv

m2.s-2

8.4   

exposure

coulomb per kilogram

C/kg

kg-1.s.A

3. Decimal multiples and submultiples of SI units:

a) The names and symbols of the decimal multiples and submultiples of SI units are formed by attaching prefix names and prefix symbols to names and symbols of the original units

b) Names and symbols of SI prefixes and the multiplying factors are specified in Table 3

Table 3

Name

Symbol

Multiplying factor

International use

Vietnamese use

The multiple

yotta

yôtta

Y

1 000 000 000 000 000 000 000 000 = 1024

zetta

zetta

Z

1 000 000 000 000 000 000 000 = 1021

exa

exa

E

1 000 000 000 000 000 000 = 1018

peta

peta

P

1  000  000  000  000  000  =  1015

tera

tera

T

1  000  000  000  000  =  1012

giga

giga

G

1  000  000  000  =  109

mega

mega

M

1  000  000  =  106

kilo

kilô

k

1  000  =  103

hecto

hectô

h

100  =  102

deca

deca

da

10  =  101

The submultiple

deci

deci

d

0,1  =  10-1

centi

centi

c

0,01  =  10‑2

mili

mili

m

0,001  =  10-3

micro

micrô

m

0,000  001  =  10-6

nano

nanô

n

0,000  000  001  =  10-9

pico

picô

p

0,000  000  000  001  =  10-12

femto

femtô

f

0,000  000  000  000  001  =  10-15

atto

attô

a

0,000 000 000 000 000 001 = 10-18

zepto

zeptô

z

0,000 000 000 000 000 000 001 = 10-21

yocto

yoctô

y

0,000 000 000 000 000 000 000 001 = 10-24

c) Compound prefix names or symbols are not permitted for the formation of decimal multiples or submultiples of an official SI unit.

Ex: nanometer: 1 nm or 10-9m, not: millimicrometre: mµm.

Where nano is name; n is its symbol and 10-9is its multiplying factor.

Note: This rule does not apply to the kilogram.  For historical reasons, the name “kilogram” contains the prefix name “kilo” to the name “gram”. Thus, decimal multiples and submultiples of the kilogram are formed by attaching the SI prefixes for gram.

Article 8. The measurement units outside the SI (non-SI units)

The measurement units outside the SI include:

1. The measurement units in conformity with international practice specified in Table 4.

Table 4

No.

Quantity

Measurement units in conformity with international practice

Value

Note

Name

Symbol

In international practice

In SI unit system

1

plane angle

degree

o

1o

(p/180) rad

 

minute

1 = (1/60)o

(p/10 800) rad

 

second

"

1" = (1/60)

(p/648 000) rad

 

2

volume

litre

L

or l

1 L

1 dm3

Decimal submultiples may be formed according to clause 3 Article 7 of this Decree.

3

time

minute

min

1 min

60 s

 

hour

h

1 h = 60 min

3 600 s

 

day

d

1 d = 24 h

86 400 s

 

4

mass

tonne

t

1 t

1 000 kg

Decimal multiples may be formed according to clause 3 Article 7 of this Decree.

unified atomic mass unit

u

1 u

1,660 538 86.10-27kg

 

5

pressure

bar

bar

1 bar

100 000 Pa

Decimal submultiples and multiples may be formed according to clause 3 Article 7 of this Decree.

6

work, energy

watt hour

W.h

1 W.h

3 600 J

Decimal submultiples and multiples may be formed according to clause 3 Article 7 of this Decree.

electronvolt

eV

1 eV

1,602 177.10-19J

Decimal submultiples and multiples may be formed according to clause 3 Article 7 of this Decree.

7

frequency level

octave

octave

1 octave

_

lg2(f2/f1) = lg22

8

loudness level

phon

phon

1 phon

_

With regard to monochrome sound, at 1 kHz, loudness in phons and dB are the same.

9. Logarithmic quantities

9.1

Level-of-a-field-quantity

neper

Np

1 Np

_

ln (F/Fo) = ln e

bel

B

1 B

_

ln (F/Fo)

= 2 lg101/2B

decibel

dB

1 dB

_

1 dB = (1/10) B

9.2

Level-of-a-power-quantity

neper

Np

1 Np

_

(1/2) ln (P/Po)

= (1/2) lne2

bel

B

1 B

_

(1/2) ln (P/Po)

= lg 10 B

decibel

dB

1 dB

_

1 dB = (1/10) B

2. The specialized measurement units specified Table 5.

Table 5

No.

Quantity

The specialized measurement units

Value

Purpose

Name

Symbol

Value in particular filed

Value in SI unit system

1

area

hectare

ha

1 ha

10 000 m2

Particularly used for the measurement of land.

barn

b

1 b

10-28m2

Particularly used in nuclear physics and radioactivity

2

frequency

round per second

r/s

1 r/s

 

1 Hz

 

Particularly used for the measurement of the frequency of circular motion

round per minute

r/min

1 r/min

 

1/60 Hz

 

Particularly used for the measurement of the frequency of circular motion

3

pressure

millimetre of mercury

mmHg

 

1 mmHg

 

133,322 Pa

 

Particularly used for the measurement of blood pressure

4

calorific value

calorie

cal

1 cal

4,186 8 J

Particularly used as a unit of food energy

5

mass

carat

ct

1 ct

 

0,2 g

 

Particularly used for the measurement of gemstones and pearls

3. Measurement units that are formed based on the combination of the units specified in Article 7 (ex: km/s); the units specified in clause 1 of this Article (ex: L/min); the units specified in Article 7 and clause 1 of this Article (ex: kg/min).

4. The measurement units other than the units specified in Article 7, clause 1, 2, 3 Article 8 of this Decree but accepted by multiple countries.

Chapter 3:

RESPONSIBILITIES OF REGULATORY AGENCIES, ORGANIZATIONS AND INDIVIDUALS

Article 9. Responsibilities of the Ministry of Science and Technology

1. The Ministry of Science and Technology has a responsibility towards the Government for the consistency of the management in the official measurement units according to the regulations in this Decree.

2. The Ministry of Science and Technology shall take lead, cooperate with relevant Ministries and regulatory bodies in:

a) Organizing the implementation of the regulations on measurement units in this Decree;

b) Conducting scientific researches, trainings, international cooperation relating to the official measurement units; informing, propagating the knowledge relating to the application of official measurement units regulated in this Decree;

c) Inspecting, examining the implementation of the regulation on the official measurement units in this Decree;

d) Taking lead, cooperating with the Ministry of Finance in the management of budget and the investment in technical ability and facilities of national measurement system.

Article 10. Responsibilities of Ministries and regulatory bodies

1. Comply with the regulation on the official measurement units prescribed in this Decree when making legislative documents.

2. Monitor, provide guidance and conduct the examination on the use of measurement instruments, the expression of measurement results that are expressed in accordance with the measurement units in the activities under the management of Ministries and regulatory bodies according to the regulation on measurement units prescribed in this Decree.

3. Take lead, cooperating with the Ministry of Finance and the Ministry of Science and Technology in the management of budget, the investment in technical ability and facilities of national measurement system.

Article 11. Responsibilities of People’s Committees of provinces

1. Comply with the regulation on the official measurement units prescribed in this Decree when making legislative and administrative documents.

2. Within their functions and competence, People’s Committees of provinces shall:

a) Provide monitor and guidance for local regulatory agencies, organizations and individuals on the implementation of the regulation on the official measurement units according to the regulations in this Decree.

b) Conduct the inspection and examination in the administrative division on the implementation of the regulations on official measurement units according to the regulations in this Decree

3. Manage the budget; invest in technical ability and facilities of national measurement system under the authority.

Article 12. Responsibilities of organizations and individuals

1. Organizations and individuals shall implement the regulations on official measurement units in this Decree in the use of measurement instruments, the expression of measurement results that are expressed in accordance with the measurement units in the manufacture, trade and import of measurement instruments subject to evaluation, in the production of the labels of quantitatively prepackaged products subject to examination according to the regulation in the Ordinance on Measurement.

2. With regard to foreign organization/individual importing goods from Vietnam, if the requirements for measurement noted in the contract are different from the regulation in this Decree and comply with the regulations of the importing countries as well as the regulations of Vietnam and such organization/individual takes responsibility for the requirements, then the contract may be carried out.

Article 4:

IMPLEMENTATION

Article 13. Effect

1. This Decree takes effect since the 16th day after the day on which it is placed on the official gazette. This Decree replaces the Decree No. 65/2001/ND-CP dated September 28, 2001 by the Government on the official measurement units of the Socialist Republic of Vietnam .

2. The products and measurement instruments containing other common measurement units that are written or carved exist before the day on which this Decree takes effect may be kept using for the cases prescribed in clause 1 Article 3 of this Decree.

3. If the measurement instruments prescribed in clause 2 of this Article are directly used for the cases prescribed in clause 1 Article 3 of this Decree, the measurement results must be converted according to the regulation in Article 4 and expressed according to the regulation in Article 6 of this Decree.

Article 14. Implementation

1. The Minister of Science and Technology is responsible for the organization for the implementation of this Decree.

2. The Ministers, Heads of ministerial-level agencies, Heads of Governmental agencies, the Presidents of People’s Committees of provinces are responsible for the implementation of this Decree./.

 

 

ON BEHAFT OF THE GOVERNMENT
THE PRIME MINISTER




Nguyen Tan Dung

 

ANNEX I

THE CONVERSION FROM THE COMMON UNITS INTO THE OFFICIAL MEASUREMENT UNITS
(Enclosed with the Decree No. 134/2007/ND-CP dated August 15, 2007 by the Government)

No.

The other measurement units

Value

Note

Name

Symbol

Value in other common measurement units

Value in official measurement units

1

Mass

 

 

 

 

1.1

quintal

q

1 q

100 kg

 

1.2

pound

lb

1 lb

0,453 5924 kg

 

1.3

ounce

oz

1 oz

28,349 52 g

 

1.4

tael

tael

1 tael

37,5 g

mass of gold, silver (traditional measurement units)

mace

mace

1 mace

3,75 g

candareen

candareen

1 candareen

0,375 g

1.5

tex

tex

1 tex

0,000 001 kg.m-1

linear density

1.6

kilogram per litre

kg/L

1 kg/L

1 kg/dm3

density

1.7

tonne per square metre

t/m3

1 t/m3

1 000 kg/m3

density

2

Length

 

 

 

 

2.1

Ångström

1

0,1 nm

 

2.2

nautical mile

n. mile

1 n. mile

1 852 m

nautical mile

2.3

mile

mile, mi

1 mile = 1 mi

1 609,344 m

mile

2.4

inch

in

1 in

2,54 cm

 

2.5

foot

ft

1 ft

0,3048 m

 

2.6

yard

yd

1 yd

0,9144 m

 

2.7

light year

l.y.

1 l.y.

9,460 73.1015m

light year

3

Area

 

 

 

 

3.1

square inch

in2

1 in2

6,4516 cm2

square inch

3.2

square mile

mile2, mi2

1 mile2=1 mi2

2,589 988 km2

square mile

3.3

square foot

ft2

1 ft2

9,290 304 dm2

square foot

3.4

square yard

yd2

1 yd2

0,836 1274 m2

square yard

3.5

are

a

1 a

100 m2

 

3.6

“mẫu” (the North and the Central parts of Vietnam)

“mẫu”

1 “mẫu” (North part)= 10 sào (North part)

3 600 m2

Units of land area (traditional units)

1 “mẫu” (Central part) = 10 sào (Central part)

4 999,5 m2

“sào“ (Bắc Bộ

“sào“ (the North and the Center parts of Vietnam)

“sào”

1sào(North part) = 15thước(Central part)

360 m2

1 “sào“ (Central part) = 15 “thước“ (Central part)

499,95 m2

“thước“ (the North and the Center parts of Vietnam)

“thước“

1 “thước“ (North part)

24 m2

1thước(Central part)

33,33 m2

“mẫu“ (South part)

“mẫu“

1mẫu= 10công

12 960 m2

công(South part)

“công“

1 công

1 296 m2

4

Volume

 

 

 

 

4.1

cubic inch

in3

1 in3

16,387 06 cm3

cubic inch

4.2

cubic foot

ft3

1 ft3

28,316 85 dm3

cubic foot

4.3

 

gallon

gal

1 gal

4,546 09 dm3

British gallon

1 gal

3,785 412 dm3

US gallon

4.4

 

fluid ounce

fl.oz

1 fl.oz

1 fl.oz

28,413 06 cm3

29,573 53 cm3

British fluid ounce

US fluid ounce

4.5

barrel

bbl

1 bbl

0,158 9873 m3

barrel

4.6

stere

st

1 st

1 m3

amount of timber

5

Temperature

 

 

 

 

5.1

Fahrenheit degree

OF

1OF

5/9 K

oF = (K-273,15) .1,8+ 3,2

6

Work, energy

 

 

 

6.1

kilogram force metre

kgf.m

1 kgf.m

9,806 65 J

 

6.2

thermal unit

Btu

1 Btu

1 055,06 J

 

6.3

horsepower

hp

1 hp

745,7 W

horsepower (British)

cv

1 cv

735,499 W

horsepower (metric unit)

7

Viscosity, strain

 

 

 

7.1

poise

centipoise

P

cP

1 P

1 cP

0,1 Pa.s

1 mPa.s = 0,001 Pa.s

viscosity

motive power

7.2

stocker

centistocker

St

cSt

1 St

1 cSt

0,0001 m2/s

1 mm2/s

viscosity

kinetics

7.3

dyne per centimetre

dyn/cm

1 dyn/cm

0,001 N/m

 

8

Force, torque (moment of force)

 

 

 

8.1

kilogram force

kgf, kG, kp

1 kgf = 1 kG

= 1 kp

9,806 65 N

 

8.2

kilogram force metre

kgf.m

1 kgf.m

9,806 65 N.m

 

8.3

dyne

dyn

1 dyn

0,000 01 N

 

8.4

dyne centimetre

dyn.cm

1 dyn.cm

10-7N.m

 

9

Pressure, stress

 

 

 

9.1

standard atmosphere

atm

1 atm

101 325 Pa

 

9.2

technical atmosphere

at

1 at

98 066,5 Pa

 

9.3

dyne per square centimetre

dyn/cm2

1 dyn/cm2

0,1 Pa

 

9.4

kilogram force per square centimetre

kgf/cm2

kG/cm2

kp/cm2

1 kgf/cm2

= 1 kG/cm2

= 1 kp/cm2

98 066,5 Pa

 

9.5

torr

Torr

1 Torr

133,322 Pa

 

9.6

metres of water gauge

mH2O

1 mH2O

9 806,65 Pa

 

9.7

millimetres of water gauge

mmH2O

1 mmH2O

9,806 65 Pa

 

9.8

pound-force per square inch

psi

1 psi

6 894,757 Pa

pound-force per square inch

9.9

kilopound-force per square inch

inch vuông

ksi

1 ksi

6 894 757 Pa

kilopound-force per square inch

9.10

inch of

mercury

inHg

1 inHg

3 376,85 Pa

inch of

mercury (60oF)

9.11

inch of water

inH2O

1 inH2O

248,84 Pa

inch of water

(60oF)

9.12

foot of

mercury

ftHg

1 ftHg

40 636,66 Pa

foot of mercury, conventional

9.13

foot of water

ftH2O

1 ftH2O

2 988,98 Pa

foot of water (39,2oF)

10

Speed, acceleration

 

 

 

10.1

foot per minute

ft/min

1 ft/min

0,005 08 m/s

foot per minute

10.2

mile per hour

mi/h,

mile/h

1 mi/h

= 1 mile/h

1,609 344 km/h

mile per hour

10.3

round per minute

r/min,

rpm

1 r/min

= 1 rpm

0,104 7198 rad/s

 

10.4

standard acceleration of free fall

gn

1gn

9,806 65 m/s2

acceleration

of free fall, standard

10.5

foot per second square

ft/s2

1 ft/s2

0,3048 m/s2

foot per

second square

10.6

gal

Gal

1 Gal

0,01 m/s2

 

10.7

inch per second square

in/s2

1 in/s2

0,0254 m/s2

inch per

second square

11

Quantity of electricity

 

 

 

 

11.1

faraday

faraday

1 faraday

96 485,31 C

 

12

Radiation

 

 

 

 

12.1

stilb

sb

1 sb

10 000 cd/m2

luminance

12.2

curie

Ci

1 Ci

3,7.1010Bq

radioactivity

12.3

rad

rad

1 rad

0,01 Gy

absorbed dose

12.4

rem

rem

1 rem

0,01 Sv

equivalent dose

12.5

roentgen

R

1 R

0,000 258 C/kg

exposure

 

ANNEX II

WRITING OFFICIAL UNITS OF MEASUREMENT
(Enclosed with the Decree No. 134/2007/ND-CP dated August 15, 2007 by the Government)

The official measurement units shall be written as follows:

1. Names and symbols of a unit shall be printed in a consistent style (only name or only symbol of the unit).

Ex: Kilometre/hour or km/h, not kilometer/h or km/hour.

2. Names of units shall be printed in upright type and start with a lower-case letter, including the units derived form proper names, except for Celsius degree.

Ex: metre, second, ampere, kelvin, pascal,…

3. Names of units shall be printed in upright type and start with a lower-case letter, except for the litre (L)

Ex: m, s…

If the name of unit is derived from a proper name,  the first character of the symbol must be an upper-case letter.

Ex: A, K, Pa…

4. The official measurement units must not be attached any affixes or other symbols.

Ex: “We” must not be used as a symbol of power instead of W.

5. Multiplication must be indicated by a dot (.).

Ex: The unit of resistance power is metre kelvin per watt: m.K/W (where m  is the symbol of metre), apart from millikelvin per watt: mK/W (where m is the SI prefix milli)

6. Division is indicated by a horizontal line, by a solidus (oblique stroke, /) or by negative exponents.

Ex:or m/s or m.s-1for metre per second.

When several unit symbols are combined, the symbols shall be put in brackets or negative exponents shall be used.

Ex: J/(kg.K); m.kg/(s3.A) or J.kg-1.K-1; m.kg.S-3.A-1.

7. The value of a quantity shall be expressed as the product of a number and a unit. A space is left between the

numerical value and the unit symbol.

Ex: 22 m, not 22m or 22  m.

Note 1: The symbol of Celsius degree shall not include any space between the degree symbol (o) and the Celsius symbol (C).

Ex: 15oC, not 15oC or 15oC.

Note 2: The symbol of plane angles that iso(degree);¢(minute);²(second) shall not include any space between the quantity value and the symbol (o); (¢); (²).

Ex: 15o20¢30¢¢,not 15o20¢30¢¢or  15o20¢30¢¢.

Note 3: When express quantity value by operation, the unit symbols shall be preceded by the numbers or the brackets containing the numbers of the operation.

Ex: 12 m – 10 m = 2 m or (12-10) m, not 12 m – 10 = 2 m or 12 – 10 m = 2 m.

12 m x 12 m x 12 m or (12 x 12 x 12) m, not 12 x 12 x 12 m.

23oC ± 2oC or (23 ± 2)oC, not : 23 ± 2oC or 23oC ± 2

Note 4: Comma (,) shall be used as the decimal mark of the quantity value, not point (.)

Ex: 245,12 mm, not 245.12 mm

 

 

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