424/2009 Sb.
DECREE
of 18 May. November 2009,
amending the Decree of the Ministry of industry and trade no. 264/2000
Coll. on the basic units of measurement and other units and their
labelling
The Ministry of industry and trade shall determine in accordance with section 27 of Act No. 506/1990
Coll. on metrology, as amended by Act No. 121/2000 Coll., to implement section 2
paragraph. 1 of the Act:
Article. (I)
The annex to Decree No. 264/2000 Coll., on the basic units of measurement and
other units and their labelling, reads as follows:
"The annex to Decree No 264/2000 Sb.
SI UNITS AND THEIR DECIMAL MULTIPLES AND PARTS; UNITS THAT ARE
DEFINED ON THE BASIS OF SI UNITS BUT ARE NOT MULTIPLES OR DEKADICKÝMI
PARTS OF THESE UNITS; THE UNITS USED IN THE SI, WHOSE VALUES HAVE BEEN
DETERMINED EXPERIMENTALLY; UNITS AND NAMES OF UNITS PERMITTED IN
SPECIALIZED AREAS; COMPOUND UNITS
1.
SI UNITS AND THEIR DECIMAL MULTIPLES AND PARTS
1.1 Basic SI units
+----------------------+-----------------------------------------+
| Quantity | Unit |
| +---------------------+-------------------+
| | The name | Brand |
+----------------------+---------------------+-------------------+
| Length | meter | m |
+----------------------+---------------------+-------------------+
| Weight | kilogram | kg |
+----------------------+---------------------+-------------------+
|Čas | second | s |
+----------------------+---------------------+-------------------+
| Electric current | Ampere | A |
+----------------------+---------------------+-------------------+
| Thermodynamic temperature | Kelvin | K |
+----------------------+---------------------+-------------------+
| Fabric quantities | MOL | MOL |
+----------------------+---------------------+-------------------+
| The intensity of the | candela | CD |
+----------------------+---------------------+-------------------+
Note:
Definition of the unit of thermodynamic temperature, is mentioned in the Act are covered by the
to the water with a plutonium isotopic assay composition defined by fabric
quantity: 0.00015576 mol 2 h per mole of 1 h, 17O per Mole 0.0003799 mole of 16O, and
0.0020052 mol of 18O per mole of 16O.
(thirteenth CGPM (1967), resolution 4 and 23. CGPM (2007), resolution 10).
1.1.1. Special name and brand for the temperature unit
expressing the temperature
+----------------------+-----------------------------------------+
| Quantity | Unit |
| +---------------------+-------------------+
| | The name | Brand |
+----------------------+---------------------+-------------------+
| Celsius temperature | degree Celsius | St. C |
+----------------------+---------------------+-------------------+
Celsius temperature t is defined as the difference t = T-T0 between the two
thermodynamic temperatures T and T0 = 273.15 k. Interval or difference
temperature may be expressed either in kelvins or in degrees Celsius.
The unit "degree Celsius" is equal to the unit "kelvin".
1.2 derived SI units
1.2.1 the general rule for the derived SI units
Units derived systematically from the base units are expressed
as algebraic expressions in the form of products of powers of the SI base units
with a numerical factor equal to 1.
1.2.2 derived SI units with special names and symbols
+----------------------------- +-------------------------+--------------------------------------+
| Quantity | Unit | Observations |
| +-------------+-----------+---------------+----------------------+
| | The name | Brand | In units | In the basic |
| | | | YOU | SI units |
+----------------------------- +-------------+-----------+---------------+----------------------+
| Plane angle | the radian | rad | | m. m-1 |
+----------------------------- +-------------+-----------+---------------+----------------------+
| Solid angle | steradian | SR | | square meters. m-2 |
+----------------------------- +-------------+-----------+---------------+----------------------+
| Frequency | Hertz | Hz | | s-1 |
+----------------------------- +-------------+-----------+---------------+----------------------+
| The force | Newton | N | | m. kg. s-2 |
+----------------------------- +-------------+-----------+---------------+----------------------+
| Pressure, stress | Pascal | PA | N. m-2 | m-1. kg. s-2 |
+----------------------------- +-------------+-----------+---------------+----------------------+
| Energy, work, quantity | | | | |
| heat | Joule | J | N. m | M2 kg. s-2 |
+----------------------------- +-------------+-----------+---------------+----------------------+
| Exercise 1), radiant flux | Watt | W | (J). s-1 | M2 kg. s-3 |
+----------------------------- +-------------+-----------+---------------+----------------------+
| The amount of electrical energy, | | | | |
| electric charge | Coulomb | C | | with. A |
+----------------------------- +-------------+-----------+---------------+----------------------+
| Electric potential difference | | | | |
electrical potentials, | | | | | |
| electromotive force | Volt | V | W. And-1 | M2 kg. s-3. And-1 |
+----------------------------- +-------------+-----------+---------------+----------------------+
| Electrical resistance | ohm | Omega | In the. And-1 | M2 kg. s-3. A-2 |
+----------------------------- +-------------+-----------+---------------+----------------------+
| Electrical conductivity | Siemens | S | And. In-1 | m-2. kg-1. S3. A2 |
+----------------------------- +-------------+-----------+---------------+----------------------+
| Electric capacity | farad | F | (C). In-1 | m-2. kg-1. S4. A2 |
+----------------------------- +-------------+-----------+---------------+----------------------+
| Magnetic flux | Weber | WB | In the. s | M2 kg. s-2. And-1 |
+----------------------------- +-------------+-----------+---------------+----------------------+
| Magnetic induction | Tesla | T | WB. m-2 | kg s-2. And-1 |
+----------------------------- +-------------+-----------+---------------+----------------------+
| Inductance | Henry | H | WB. And-1 | M2 kg. s-2. A-2 |
+----------------------------- +-------------+-----------+---------------+----------------------+
| Luminous flux | lumen | LM | CD. SR | cd |
+----------------------------- +-------------+-----------+---------------+----------------------+
| Lighting | Lux | LX | LM. m-2 | m-2. cd |
+----------------------------- +-------------+-----------+---------------+----------------------+
| Activity (of a radionuclide) | Becquerel | Bq | | s-1 |
+----------------------------- +-------------+-----------+---------------+----------------------+
| Absorbed dose, specific | | | | |
| (by weight) communicated energy | | | | |
kerma, absorbed by the index | benefits | Gray | Gy | (J). kg-1 | M2.-2 |
+----------------------------- +-------------+-----------+---------------+----------------------+
| Dose equivalent | sievert | SV | (J). kg-1 | M2.-2 |
+----------------------------- +-------------+-----------+---------------+----------------------+
| Catalytic activity | catalogue | Kat | | MOL. s-2 |
+----------------------------- +-------------+-----------+---------------+----------------------+
| 1) special names for the unit of output: the name volt-ampere (symbol "VA"), if used, |
| expresses the apparent power of alternating electric current, and var (symbol "var") |
| If used, reactive electric power. The unit of the var is not included in the resolutions |
| meeting of the CGPM. |
+----------------------------- -----------------------------------------------------------------+
Units derived from SI base units may be expressed by using the
the units listed in point 1.
Derived SI units may be expressed by the special names and symbols
listed in the table above; for example, the SI unit of dynamic viscosity may be
expressed as m-1. kg. s-1 or N. with. m-2 or Pa. with.
1.3. Prefixes and their symbols used to designate certain
decimal multiples and submultiples
+---------+----------+----------+---------+-----------+---------+
| Factor | The prefix | Brand | Factor | The prefix | Brand |
+---------+----------+----------+---------+-----------+---------+
| 1024 | Yotta-| Y | 10-1 | Deci | d |
+---------+----------+----------+---------+-----------+---------+
| 1021 | zetta | Z | 10-2 | centi-| c |
+---------+----------+----------+---------+-----------+---------+
| 1018 | EXA | E | 10-3 | Mili | m |
+---------+----------+----------+---------+-----------+---------+
| 1015 | PETA | P | 10-6 | micro | micro |
+---------+----------+----------+---------+-----------+---------+
| 1012 | Tera | T | 10-9 | Nano | n |
+---------+----------+----------+---------+-----------+---------+
| 109 | Giga | G | 10-12 | piko | p |
+---------+----------+----------+---------+-----------+---------+
| 106 | Mega | M | 10-15 | Femto | f |
+---------+----------+----------+---------+-----------+---------+
| 103 | kilo | k | 10-18 | Atto | a |
+---------+----------+----------+---------+-----------+---------+
| 102 | hecto | h | 10-21 | zepto | z |
+---------+----------+----------+---------+-----------+---------+
| 101 | blanket | da | 10-24 | yocto-| y |
+---------+----------+----------+---------+-----------+---------+
Names and symbols of decimal multiples and submultiples unit of mass is created
appending the prefix to the word "gram" and their brands to the mark "g".
Where are derived units expressed as a fraction, to their
decimal multiples and submultiples appending a prefix to drive in
the numerator or the denominator, or both of these parts.
Compound prefixes, that is, a prefix, which are created by merging
several of the above prefixes should not be used.
1.4. Special authorized names and symbols of decimal multiples and submultiples
SI units
+------------------+---------------------------------------------+
| Quantity | Unit |
| +--------+------------+-----------------------+
| | The name | Brand | The value of |
+------------------+--------+------------+-----------------------+
| Volume | Lite | L or L 1) | 1 l = 1 dm3 = 10-3 m3 |
+------------------+--------+------------+-----------------------+
| Weight | tuna | t | 1 t = 1 Mg = 103 kg |
+------------------+--------+------------+-----------------------+
| Pressure, stress | bar | bar 2) | 1 bar = 105 Pa |
+------------------+--------+------------+-----------------------+
1) for the unit litre is possible to use two tags: the "l" or "L".
(16th meeting of the CGPM (1979), resolution 6).
2) the units listed in the brochure of the International Bureau of weights and measures between the
units which are allowed temporarily.
Note: the prefixes and their symbols listed in 1.3 may be used in
conjunction with the units and symbols contained in table 1.4.
2.
UNITS WHICH ARE DEFINED ON THE BASIS OF SI UNITS BUT ARE NOT
DEKADICKÝMI MULTIPLES OR PARTS OF THESE UNITS
+-------------+--------------------------------------------------+
| Quantity | Unit |
| +-----------------+--------+-----------------------+
| | The name | Brand | The value of |
+-------------+-----------------+--------+-----------------------+
| Plane angle | circulation * 1) and) | circulation = | 1 2 pi rad |
+-------------+-----------------+--------+-----------------------+
| grad or gon | * | GON * | pí |
| | | | 1 =-gon-rad |
| | | | 200 |
+-------------+-----------------+--------+-----------------------+
| | degree | degree | PI |
| | | 1 degree =-|--rad |
| | | | 180 |
+-------------+-----------------+--------+-----------------------+
| angular minute | | min | PI |
| | | | 1 minute =-----rad |
| | | | 10800 |
+-------------+-----------------+--------+-----------------------+
| angular second | | second | PI |
| | | | 1 second =------rad |
| | | | 648000 |
+-------------+-----------------+--------+-----------------------+
| | Minutes | min | 1 min = 60 s |
+-------------+-----------------+--------+-----------------------+
| | hour | h | 1 h = 3 600 s |
+-------------+-----------------+--------+-----------------------+
| | day | 1 d = d | 86 400 s |
+-------------+-----------------+--------+-----------------------+
| 1) mark (*), that follows the name or mark of drive |
| indicates that this drive does not appear in the lists drawn up |
| CGPM, CIPM, or BIPM. This is true for the whole of this attachment. |
|, and) there is no international brand. |
+----------------------------------------------------------------+
Note: the prefixes listed in 1.3 may be used only in
connection with the names "degree" or "gon" and by the symbol "gon".
3.
THE UNITS USED IN THE SI, WHOSE VALUES HAVE BEEN DETERMINED EXPERIMENTALLY
+-----------+---------------------------+------------------------------------+
| | Unit |
| Veličina +--------------+------------+------------------------------------|
| | The name | Brand | The definition |
+-----------+--------------+------------+------------------------------------+
| Energy | electronvolt | EV | The electronvolt is the kinetic energy |
| | | | It acquires an electron when it passes through |
| | | | a potential difference of 1 volt in |
| | | | vacuum |
+-----------+--------------+------------+------------------------------------+
| Weight | Unified | u | Unified atomic mass |
| | Atomic | | Unit is equal to 1/12 of the mass |
| | mass | | an atom of the nuclide 12 6 C |
| | Unit | | |
| | | | |
+-----------+--------------+------------+------------------------------------+
Note: the prefixes and their symbols listed in 1.3 may be used in
conjunction with these two units and with their symbols.
4.
UNITS AND NAMES OF UNITS PERMITTED IN SPECIALIZED FIELDS ONLY
+-----------------------+--------------------------------------------------+
| Quantity | Unit |
| +-----------------+--------+-----------------------+
| | The name | Brand | The value of |
+-----------------------+-----------------+--------+-----------------------+
| Optical power | | | |
optical systems | | diopters | | 1 diopters = 1 m-1 |
+-----------------------+-----------------+--------+-----------------------+
| The weight of precious metals | | metric carat = | 1 |
| and stones | Carat | | 2.10-4 kg |
+-----------------------+-----------------+--------+-----------------------+
| Agricultural area | | | |
| & plots | AR | and | 1 ar = 102 m2 |
+-----------------------+-----------------+--------+-----------------------+
| The weight of the textile | | | |
to outlining and | | | | |
| length unit | TeX | TeX tex | 1 = 10-6 kg m-1 |
+-----------------------+-----------------+--------+-----------------------+
| Blood pressure and other | mm | | |
| body fluids | Mercury | mmHg 1 mmHg = | 133.322 Pa |
+-----------------------+-----------------+--------+-----------------------+
| The area of the effective | | | |
| cross-section | barn | (b) | 1 b = 10-28 m2 |
+-----------------------+-----------------+--------+-----------------------+
The prefixes and their symbols listed in 1.3 may be used in conjunction with
the above units and symbols, with the exception of the millimetre of mercury and its
tags. Multiple of 102 aru, however, called a "hectare".
5.
COMPOUND UNITS
The combination of the units listed in chapter I to form compound units. '.
Article. (II)
The effectiveness of the
This Decree shall enter into force on 1 January 2000. January 1, 2010.
Minister:
Ing. Tošovský in r.
