Czech Metrology Institute  
Okružní 31, 638 00  Brno  
 
1. ------IND- 2015 0532 CZ - EN- ------ 20151006 --- --- PROJET 
 
Executive summary for the Commission (not part of this legislation)  
The placing on the market and putting into use in the Czech Republic of automatic weighing 
instruments is governed by Direct ive 2004/22/EC (MID). Once they have been put into use, they 
become subject to national metrological regulation – verification (at specified intervals). The 
legislation which is the subject of this notification only applies to the verification of measuring  
instruments that have already been put into use. It does not concern their placing on the market or 
putting into use (with the exception of the cases referred to in Article  23 of the MID).  
The requirements imposed on these measuring instruments when in us e are fully compatible with the 
MID and also stem from the recommendations under OIML  R 106-1. 
Some parameters specified in this document are properties of measuring instruments in new condition 
and are provided only because the preservation of these prope rties when the instrument is in use is 
subject to visual or other checks within the scope of verification.  
(End of executive summary.)  
 
 
REF. No: 0313/007/15/Pos.  
Contact person: Ing. Miroslav Pospíšil  
Telephone: 545  555 135, -131 
As the authority with sub stantive and territorial jurisdiction in the matter of laying down metrological 
and technical requirements for legal measuring instruments and laying down the methods for type 
approval and verification of legal measuring instruments under §  14(1) of Act No  505/1990 on 
metrology, as amended (hereinafter the “Metrology Act”), and in accordance with the provisions of 
§ 172 et seq. of Act No  500/2004, the Code of Administrative Procedure (hereinafter “CAP”), the 
Czech Metrology Institute (hereinafter the “CMI”)  commenced ex officio proceedings on 2  July 2015 
under §  46 of the CAP and, based on the supporting documents, hereby issues the following:  
 
 
I. 
G E N E R A L  M E A S U R E  
 
number: 0111 -OOP -C056 -15 
Ref. No 0313/007/15/Pos.,  
 General Measure No  0111 -OOP -C056 -15 
2 laying down metrological and technical req uirements for legal measuring instruments, 
including the tests for the verification of legal measuring instruments:  
“automatic weighing instruments – instruments for weighing railway vehicles in 
motion”  
 
This General Measure lays down the metrological and technical requirements for automatic weighing 
instruments – rail-weighbridges to be applied in the verification of these instruments after they have 
been placed on the market or put into use. These requirements comply with the requirements of 
Government Re gulation No  464/2005 laying down the technical requirements for measuring 
instruments1), as amended (hereinafter the “Government Regulation on Measuring Instruments”) and 
the requirements of harmonised standards/OIML documents.  
The verification of automati c weighing instruments type approved under the Metrology Act effective 
until 30  October  2006, i.e. prior to the transposition of Directive  2004/22/EC of the European 
Parliament and of the Council, as amended, into Czech law, shall be subject to metrologica l 
requirements applicable at the time they were put into circulation.  
1 Definitions  
For the purposes of this General Measure, the terms and definitions according to VIM and VIML2) and 
the terms and definitions below shall apply.  
1.1 
weighing  instrument  
a measuring instrument serving to determine the mass of a body by using the action of gravity on that 
body  
1.2 
automatic  weighing  instrument  
a weighing device that weighs without the intervention of an operator and/or follows a predetermined 
program me of auto matic processes characteristic of the weighing instrument  
1.3 
rail-weighbridge  
an automatic weighing device having a load receptor inclusive of rails for conveying railway vehicles  
2 Metrological requirements  
The metrological requirements are based on the requirements of the Government Regulation on 
Measuring Instruments, applying the relevant requirements under OIML Recommendation R  106-1 
Automatic rail -weighbridges – Part 1: Metrological and technical requirements  – Tests 3). 
Measuring instruments type ap proved prior to the entry into force of the Metrology Act shall be 
subject to the metrological requirements applicable at the time they were put into circulation.  
                                                      
1)   This Government Regulation implements Directive  2004/22/EC of the European Parliament and of the 
Council of 31 March  2004 on measuring instruments, as amended, into Czech legislation.  
2)   International Vocabulary of Metrology – Basic and General Concepts and Associated Terms (VIM) and 
International Vocabulary of Terms in Legal Metrology (VIML) ar e part of the technical harmonisation 
compendium “Terminology in the Area of Metrology”, which is publicly accessible at www.unmz.cz.  
3)   OIML  R 106-1 “Automatic rail -weighbridges  – Part 1: Metrological and technical requirements  – Tests” – 
publicly avail able at www.oiml.org  General Measure No  0111 -OOP -C056 -15 
3 2.1 Rated operating conditions  
The rated operating conditions shall be established by the man ufacturer with the minimum operating 
temperature range being 30  °C. 
For other influence quantities (if applicable):  
a) the rate(s) of operation;  
b) the characteristics of the product to be weighed.  
2.2 Measuring range  
The measuring range shall be expressed in te rms of the maximum and minimum capacity.  
2.3 Accuracy classes  
Rail-weighbridges are divided into four accuracy classes as follows:  
0.2; 0.5; 1 and 2.  
2.4 Maximum permissible errors  
2.4.1  Maximum permissible error in verification  
The maximum permissible err ors in verification of instruments for weighing -in-motion of a single rail 
vehicle (hereinafter “wagon”) or a total train are shown in Table  1. 
Table  1 – Maximum permissible error in verification  
Accuracy class  Maximum permissible error in verification  
0.2 ± 0.10 % 
0.5 ± 0.25 % 
1 ± 0.50 % 
2 ± 1.0 % 
 
2.4.2  Maximum permissible in -service errors  
When inspecting weighing instruments in service or carrying out verification of legal measuring 
instruments in accordance with §  11a(1) of the Metrology Act at th e request of a person who may be 
affected by incorrect measurement, the maximum permissible in -service errors referred to in Table  2 
shall be applied.  
Table 2  – Maximum permissible in -service errors  
Accuracy class  Maximum permissible in -service errors  
0.2 ± 0.2 % 
0.5 ± 0.5 % 
1 ± 1.0 % 
2 ± 2.0 % General Measure No  0111 -OOP -C056 -15 
4  
2.4.3  The maximum permissible errors for the weight of coupled or uncoupled wagons weighing -in-
motion shall be one of the following values, whichever is the greatest:  
a) the value calculated for the given accuracy  class in accordance with Table  1, rounded to the 
nearest scale interval;  
b) the value calculated for the given accuracy class according to Table  1, rounded to the nearest 
scale interval for a weight equal to 35  % of the maximum wagon weight (as inscribed on the 
descriptive markings);  
c) one scale interval ( d). 
2.4.4  The maximum permissible errors for the weight of train weighing -in-motion shall be one of 
the following values, whichever is the greatest : 
a) the value calculated for the given accuracy class in accorda nce with Table  1, rounded to the 
nearest scale interval;  
b) the value calculated for the given accuracy according to Table  1, for the weight of a single 
wagon equal to 35  % of the maximum wagon weight (as inscribed on the descriptive 
markings) multiplied by t he number of reference wagons (not exceeding  10) in the train, and 
rounded to the nearest scale interval;  
c) one scale interval ( d) for each wagon in the train, but not exceeding 10  d. 
2.4.4  When weighing coupled wagons, the errors of not more than 10  % of th e weighing results 
taken from one or more passes of the train may exceed the appropriate maximum permissible error 
given in Table  1, but shall not exceed twice the maximum permissible error.  
2.5 Scale interval (d) 
The relationship between the accuracy clas s and the scale interval shall be as specified in Table  3. 
Table  3 – Scale intervals  
Accuracy class  Scale interval  (d) 
0.2 d  50 kg 
0.5 d  100 kg 
1 d  200 kg 
2 d  500 kg 
 
2.6 Weighing range  
2.6.1  The minimum capacity shall not be less than 1  t and  not greater than the value of the result of 
the minimum wagon weight divided by the number of partial weighings.  
2.6.2  The minimum wagon weight shall not be less than 50  d. 
3 Technical requirements  
The technical requirements are based on the requirements of the Government Regulation on 
Measuring Instruments, applying the relevant requirements under OIML Recommendation R  106-1 
Automatic rail -weighbridges – Part 1: Metrological and technical requirements  – Tests 3). 
Measuring instruments type approved prior to the entry into force of the Metrology Act shall be 
subject to the metrological requirements applicable at the time they were put into circulation.  General Measure No  0111 -OOP -C056 -15 
5 3.1 Means shall be provided to limit the effects of tilt, loading and rate of operation such that 
maximum permissible errors are not exceeded in normal operation.  
3.2 Adequate material handling facilities shall be provided to enable the instrument to respect the 
maximum permissible errors during normal operation.  
3.3 Any operator control interface shall be cle ar and effective.  
3.4 The integrity of the display (where present) shall be verifiable by the operator . 
3.5 Adequate zero setting capability shall be provided to enable the instrument to respect the 
maximum permissible errors during normal operation.  
3.6 Where a printout is possible, any result outside the measurement range shall be identifiable. All 
printing must be clear and durable for the intended use. Printed figures shall be at least 2  mm high.  
The printout and /or data storage shall contain at least t he date, time, operating speeds, error messages, 
instrument identification, each wagon mass and (in the case of train weighing) the train mass and 
number of wagons in the train. If a train mass is printed, the locomotive mass shall be excluded. If the 
train includes wagons where no mass was recorded, the total printout must indicate the number of 
these wagons and the number of the wagons omitted from the total train mass.  
3.7 For a particular method of weighing -in-motion and combination of load receptors, a ll mass 
indications, records and printing devices shall have the same scale interval.  The scale intervals of the 
indicating, recording and printing devices shall be in the form of 1  × 10k, 2 × 10k or 5 × 10k, k being a 
positive or negative whole number or zero.  
3.8 The units of mass are the kilogram (kg) and the  tonne (t).  
3.9 The weigh -in-motion indication shall include either the speed in  km/h at which the entire wagon 
was weighed, or a notification of speed fault detection.  
3.10 Rail-weighbridges  shall n ot indicate or print the mass of any wagon or train as a weighing 
result which is less than Min or greater than Max +9  d unless clear warning is given in the indication 
or printout.  
The indicator shall display at least each wagon mass and, in the case of t rain weighing, the train mass 
and the number of wagons in the train.  
3.11 Weighing instruments shall be proofed against fraudulent use. Components that may not be 
dismantled or adjusted by the user shall be secured against such actions.  
4 Instrument markin gs 
4.1 Markings on the instrument  
The weighing instruments shall bear the following markings as a minimum:  
– trade mark or name of the manufacturer;  
– serial number;  
– weighing method;  
– maximum wagon mass ..... kg or t;  
– minimum wagon mass ..... kg or t;  
– not to be used for liquid products (if applicable);  
– number of partial weighings per wagon (if applicable);  General Measure No  0111 -OOP -C056 -15 
6 – maximum operating speed  km/h;  
– direction of weighing (if applicable);  
– wagons pushed/pulled (whichever is applicable);  
– scale interval for stationary load (if ap plicable) kg or t;  
– supply voltage ....... V;  
– supply frequency ….  Hz; 
– temperature range (when not –10 °C to 40  °C); 
– the number of the type approval certificate, if any;  
– accuracy class for wagon mass (each weighing method, if applicable) 0.2, 0.5, 1 or 2;  
– accuracy class for train mass 0.2, 0.5, 1 or 2;  
– maximum capacity Max = ....... kg or t;  
– minimum capacity Min = ....... kg or t;  
– scale interval d = ...... kg or t;  
– maximum operating speed vmax = ....... km/h;  
– minimum operating speed vmin = ....... km/h.  
For t rain weighing:  
– maximum number of wagons per train nmax = .......  
– minimum number of wagons per train nmin = .......  
The label bearing the compulsory markings shall be sealed unless it cannot be removed without being 
destroyed.  
4.2 Placement of the official mark  
The official marks shall be placed in such a manner that after they have been affixed the weighing 
instrument cannot be adjusted or components, for which access is prohibited, accessed. The marks 
shall be of such design that they cannot be dismantled without being damaged or destructed.  
The manner of placement of the official marks is provided in the type approval certificate or the EC 
type-examination certificate or other document or provisions applied within the context of conformity 
assessment when placing the device on the market and putting it into use.  
5 Type approval of measuring instruments  
Automatic weighing instruments – rail-weighbridges shall be placed on the market and put into use 
after conformity assessment in accordance with the Governme nt Regulation on Measuring Instruments 
and thus are not subject to type approval.  
6 Initial verification  
A procedure identical to that used for follow -up verification referred to in Chapter  7 shall be applied in 
initial verification.  
7 Follow -up verificati on 
Follow -up verification, i.e. any verification of the measuring instrument conducted after prior 
verification or conformity assessment and, if applicable, examination in accordance with §  11a(1) of 
the Metrology Act shall be carried out in accordance wit h this measure regardless of whether the General Measure No  0111 -OOP -C056 -15 
7 instrument was placed on the market and put into circulation in accordance with the Metrology Act or 
the Government Regulation on Measuring Instruments.  
The verification of weighing instruments shall be subject to t he metrological and technical 
requirements applicable when they were placed into circulation.  
7.1 Overview of the tests conducted  
Each verification shall consist of the following actions and tests:  
a) visual inspection;  
b) accuracy test (in -motion weighing  test).  
The scope of the tests depends on the markings (see Chapter  4). Modes of operation may include 
loaded or empty wagons, wagons pushed or pulled  and one or both directions of weighing.  
7.2 Visual inspection  
The purpose of the visual inspection of rai l-weighbridges shall be to check that:  
– the measuring instrument presented for verification complies with the approved type or design 
of the measuring instrument for which conformity was declared in the context of its placement 
on the market, while attentio n shall be paid to checking the markings referred to in Chapter  4; 
– the measuring instrument is not mechanically damaged and its metal parts do not have traces 
of corrosion that could have an adverse effect on the function of the instrument.  
If the measurin g instrument fails to meet the visual inspection requirements, no further tests are 
performed.  
7.3 Test conditions and equipment  
7.3.1  The weighing instrument shall be fully assembled and fixed in the position in which it is 
intended to be used under typic al in-service conditions.  
7.3.2  The reference wagons used for testing shall represent the range of wagons for which the 
instrument is intended. The selection of the reference wagons shall be such that, as far as practicable, 
each mode of operation inscribe d on the descriptive markings is covered.  
7.3.3  Test equipment – the control weighing instrument shall make it possible to determine the true 
mass of each reference wagon to an error not greater than 1/3 of the relevant maximum permissible 
error for automa tic weighing referred to in Table  1. 
Where necessary, the control weighing instrument shall be verified immediately after the tests to 
check that its characteristics have not changed.  
7.3.4  Where the control weighing instrument does not have a suitable sca le interval, suitable 
resolution may be obtained by using additional weights to determine the changeover point or using a 
device which permits suitable resolution.  
It must be ensured that the control weighing instrument can be used to weigh each reference wagon at 
one time. Where suitable control weighing instrument for weighing at one time is not available, a 
control weighing instrument for partial weighing may be used.  
7.3.5  If a rail -weighbridge is also constructed for use as a control weighing instrumen t, it shall have 
an appropriate scale interval or scale interval for stationary load.  
Where the scale interval for stationary load ds is not equal to the scale interval d, it shall be 
automatically out of service when the instrument is in use for weighing -in-motion.  General Measure No  0111 -OOP -C056 -15 
8 7.3.6  Where the control weighing instrument is not constructed only for partial stationary weighing 
of reference wagons, it shall have a scale interval for stationary weighing.  
7.3.7  Partial weighing of reference wagons shall comprise at least f our weighings of axles or bogies 
of the wagon so that each axle or bogie is gradually statically weighed in two directions. The 
correction described below shall be applied to the weighing result.  
The correction is established by weighing an empty wagon and  a wagon with standard weights evenly 
distributed in the wagon.  
The weighing to determine the correction shall be carried out as follows:  
Each axle of a two -axle wagon is statically weighed at the beginning, in the centre and at the end of 
the load recepto r and the results are recorded. The mean value for the axles and the mean value of the 
total mass of the wagon are calculated. Measurements shall be performed with an empty wagon and 
with weights evenly distributed on the wagon.  
7.3.8  The mass of the stand ard weights shall be equal to the larger of the following values:  
a) the difference between the maximum capacity and 1.5 times the weight of a partially weighed 
empty wagon; the result is rounded down to the nearest tonne;  
b) 10 t 
The error of standard weights s hall not exceed 1/3 of the maximum permissible error for the given load 
referred to in Article  2.4.1.  
7.3.9  The correction shall be equal to the difference between the mass of the weights and the mass 
of the weights obtained by calculation (the value for t he empty wagon shall be deducted from the 
value for the wagon with a load). This correction shall be added to the value determined for the 
reference wagon.  
7.4 In-motion weighing accuracy test  
All test runs shall be conducted at operating speeds that are w ithin the range of speeds inscribed on the 
descriptive markings with at least one test run at or close to:  
– maximum operating speed, vmax; 
– minimum operating speed, vmin; 
– typical site operating speed.  
7.4.1  Uncoupled wagons test  
A minimum of five reference w agons having a range of loads from zero load to that of a fully loaded 
wagon shall be weighed. A minimum of five results is obtained for each reference wagon. The 
maximum error between the results obtained by in -motion weighing and static weighing shall co mply 
with the requirements of Article  2.4.1 for verifications or Article  2.4.2 for in -service checks of 
weighing instruments or examination of legal measuring instruments under §  11a(1) of the Metrology 
Act. 
7.4.2  Coupled wagons or train test  
The test trai n shall comprise a number of wagons equal to the maximum number of wagons of a train 
that the weighing instrument is intended to weigh in accordance with the descriptive markings. Where 
the test train may not contain only reference wagons, the number of re ference wagons may be 
distributed in accordance with Table  4. The reference wagons shall be coupled in groups at the front, 
middle and rear of the train. Instruments designed to determine the total mass of a train shall be tested 
by using a test train of e mpty reference wagons, partially loaded reference wagons and a train of full General Measure No  0111 -OOP -C056 -15 
9 wagons. Each test train shall be weighed repeatedly in the given direction (according to the descriptive 
markings) to obtain not less than 60 wagon weights.  
Table 4  – Proportion o f reference wagons in a test train  
Total number of wagons in test train (n)  Minimum number of reference wagons  
n ≤ 10 5  
10 < n ≤ 30 10 
30 < n 15 
 
When weighing wagons, the maximum error between the results obtained by in -motion weighing and 
static wei ghing shall comply with the requirements of Article  2.4.1 for verifications or Article  2.4.2 
for in -service checks of weighing instruments or examination of legal measuring instruments under 
§ 11a(1) of the Metrology Act.  
When weighing a train, the weighin g error is calculated as the difference of the results of weighing 
reference wagons and the sum of reference wagon mass determined using the control weighing 
instrument. The error shall comply with the maximum permissible error under Article  2.4.1 for 
verifications or Article  2.4.2 for in -service checks of weighing instruments or examination of legal 
measuring instruments under §  11a(1) of the Metrology Act.  
7.4.3  Functionality test when the speed limits given by the descriptive markings are exceeded.  
The t est shall be performed with one reference wagon at a speed outside the range given by the 
descriptive markings:  
a)  at a speed at least 5  % higher than the maximum operating speed according to the descriptive 
markings, vmax; 
b) at a speed at least 5  % lower than  the minimum operating speed according to the descriptive 
markings, vmin, (if applicable).  
Where the indication or printout does not give a clear speed fault notification, the instrument must not 
indicate or print weighing results when the above conditions  are detected.  
8 Notified standards  
For the purposes of specifying the metrological and technical requirements for measuring instruments 
and the verification methods arising from this General Measure, the CMI shall provide notification of 
the Czech technic al standards, other technical standards or technical documents of international or 
foreign organisations, or other technical documents containing more detailed technical requirements 
(hereinafter “notified standards”). The CMI shall publish a list of these  notified standards attached to 
the relevant measures, together with the General Measure in a manner accessible to the public (on the 
www.cmi.cz website).  
Compliance with notified standards or parts thereof shall be conside red, to the extent and under the 
conditions laid down in a General Measure, as compliance with those requirements laid down in this 
measure to which these standards or parts thereof apply.  
 
 
II. 
G R O U N D S  
The CMI has issued this General Measure laying down m etrological and technical requirements for 
legal measuring instruments and tests for the verification of these legal measuring instruments in General Measure No  0111 -OOP -C056 -15 
10 accordance with §  14(1)(j) of the Metrology Act to implement §  9(1), §  9(9) and  § 11a(3) of the 
Metrology Act.  
Under (a) of Item  2.1.3, Automatic weighing instruments, in the Annex “List of the Types of Legal 
Measuring Instruments” to Decree No  345/2002 specifying the measuring instruments whose 
verification is mandatory and the measuring instruments subject to type a pproval, as amended, 
instruments for weighing railway vehicles in motion of class 0.2, 0.5 and 1 are classified as measuring 
instruments that are subject to verification.  
As such, the CMI has issued this General Measure to implement §  9(1), §  9(9) and  § 11a(3) of the 
Metrology Act for this specific type of measuring instruments, “automatic weighing instruments – 
instruments for weighing railway vehicles in motions” laying down the metrological and technical 
requirements for automatic weighing instruments – instruments for weighing railway vehicles in 
motions and the tests for the verification of these legal measuring instruments.  
This legislation (General Measure) was notified in accordance with European Parliament and Council 
Directive  98/34/EC of 22  June 1998 on the procedure for the provision of information in the field of 
technical standards and regulations and rules on Information Society services, as amended.  
 
 
III. 
I N S T R U C T I O N S  
In accordance with §  173(2) CAP, no appeals may be made regarding general m easures.  
In accordance with the provisions of §  172(5) CAP, decisions on objections are final and appeals may 
not be made against them.  
Compliance of general measures with legislation may be subject to a review process in accordance 
with §§  94 to 96 CAP. A  party to the proceedings may initiate review proceedings to be conducted by 
the administrative authority which issued the General Measure. If the administrative authority finds no 
reason to commence the review proceedings, it shall communicate and provide  grounds for this within 
30 days. Pursuant to §  174(2) of the CAP, a ruling on the commencement of review proceedings may 
be issued within three years of the entry into force of the General Measure.  
 
 
IV. 
E N T R Y  I N T O  F O R C E  
This General Measure shall enter i nto force on the fifteenth day as of its date of publication (§  24d of 
the Metrology Act).  
...…………………………..............  
RNDr. Pavel Klenovský  
Director General