The Czech Metrology Institute  
Okružní 31, 638 00 Brno  
 
1. ------IND- 2015 0534 CZ - EN- ------ 20150930 --- --- PROJET 
 
Executive summary for the European Commission (not part of this legislation)  
In the Czech Republic, automatic weighing instruments are placed on the market and into use 
according to Directive  2004/22/EC (MID). Once they have been put into use, they become subject to 
national metrological regulation – verification (at specified intervals). This notified legislation only 
applies to the verification of measuring instruments that have already been put into use. It does not 
concern placing them on the market or putting them into use (with the exception of cases under 
Article  23 of the MID).  
The requirements imposed on these measuring instruments when in use are fully compatible with the 
MID and are a lso based on recommendations of OIML R  107-1. 
Some parameters specified in this document are properties of measuring instruments in new 
conditions and are provided only because the preservation of these properties when the instrument is 
in use is subject t o visual or other checks within the scope of verification.  
(End of executive summary.)  
REF. no.: 0313/005/15/Pos.  
Compiled by: Eng. Miroslav Pospíšil  
Telephone: 545  555 135, -131 
As the authority with substantive and territorial jurisdiction in laying dow n metrological and technical 
requirements for specified measuring instruments and stipulating test methods for type approval and 
verification of specified measuring instruments according to §  14(1) of Act No  505/1990, on 
metrology, as amended (hereinafter the "Metrology Act"), and according to §  172 et seq. of Act 
No 500/2004, the Administrative Code (hereinafter the "AC"), the Czech Metrology Institute 
(hereinafter the "CMI") commenced ex officio proceedings on 2   July  2015 according to §  46 of the 
AC, an d based on the supporting documents, hereby issues the following:  
I. 
MEASURE OF A GENERAL  NATURE  
 
No: 0111 -OOP -C054 -15 
ref. no. 0313/005/15/Pos.,  
 
laying down metrological and technical requirements for specified measuring 
instruments, including test metho ds for the verification of specified measuring 
instruments:  Measure of a General Nature No  0111 -OOP -C050 -15 
2 "automatic weighing instruments – discontinuous totalisers"  
 
This measure of a general nature stipulates metrological and technical requirements for automatic 
weighing instruments – discontinuous totalisers , which are applied after they are placed on the market 
or put into use during their verification. These requirements are in accordance with requirements of 
Government Order No  464/2005, which stipulates technical requirements for measuring instr uments1), 
as amended (hereinafter the "Government Order on Measuring Instruments") and with requirements of 
harmonised OIML standards/documents.  
The verification of automatic weighing instruments of the types approved under the Metrology Act 
effective unti l 30 October  2006, i.e. before the transposition of Directive  2004/22/EC of the European 
Parliament and of the Council, as amended, into Czech law, shall be subject to metrological 
requirements applicable at the time they were put into circulation.  
1 Basic  definitions  
The terms and definitions according to the VIM and VIML2) as well as the terms and definitions 
specified in the following shall apply for the purposes of this Measure of a General Nature:  
1.1 
weighing instruments  
weighing equipment that determ ines the mass of an object or loose substance utilising the effect of 
gravity on this object, liquid or loose substance  
1.2 
automatic weighing instrument s 
weighing equipment that requires no operator intervention and/or follows a pre -set automatic process 
program that is characteristic for the given weighing instrument  
1.3 
Discontinuous totalising weighing instruments (totalising hopper weighers)   
automatic weighing equipment that determines the mass of a large amount of loose product  by 
separating this am ount into discrete portions. Each discrete batch is weighed and gradually totalled. 
Each discrete batch is then added to the total amount already weighed.  
2 Metrological requirements  
Metrological requirements are based on the requirements of the Government  Order on Measuring 
Instruments and utilising relevant requirements of recommendations of - OIML R 107 -1 
Discontinuous totalising automatic weighing instruments (totalising hopper weighers) Part 
1: Metrological and technical requirements – Tests 3). 
Measur ing instruments of the types approved under the Metrology Act shall be subject to the 
metrological requirements applicable at the time they were put into circulation.  
                                                      
1)  This Gov ernment Order implements Directive  2004/22/EC of the European Parliament and of the Council 
of 31  March  2004 on measuring instruments, as amended.  
2)  International Vocabulary of Metrology – Basic and General Concepts and Associated Terms (VIM) and 
International Vocabulary of Terms in Legal Metrology (VIML) are part of the technical harmonisation 
compendium "Terminology in the Area of Metrology", which is publicly accessible at www.unmz.cz.  
3)  OIML  R 107-1 "Discontinuous totalising automatic wei ghing instruments (totalising hopper weighers)  – 
Part 1: Metrological and technical requirements  – Tests" – publicly available at  www.oiml.org  Measure of a General Nature No  0111 -OOP -C050 -15 
3 2.1 Rated operating conditions  
The manufacturer specifies rated operating conditions for discontinuous totalising weighing 
instruments , where the minimum operating temperature range is 30  °C. 
For other influencing variables (if applicable):  
a) operating speed(s);  
b) properties of the weighed product.  
2.2 Measuring range  
The measuring range is expres sed as maximum and minimum weighing capacity.  
2.3 Accuracy classes  
Weighing instruments are classified into four accuracy classes: 0.2), 0.5), 1 and 2.  
2.4 Maximum permissible errors  
2.4.1  Maximum permissible error during verification  
During verification, maximum permissible errors according to Table 1 are used.  
Table 1  – Maximum permissible errors of totalised load  
Accuracy class  Maximum permissible error of totalised load  
0.2 ±0.10  % 
0.5 ±0.25  % 
1 ±0.50  % 
2 ±1.00  % 
 
2.4.2  Maximum permissible error du ring use  
When weighing instruments are being checked while in use or during re -testing of a specified 
measuring instrument performed according to §  11a(1) of the Metrology Act upon request by a subject 
that can be affected by incorrect measurement, the max imum permissible operating errors listed in 
Table 2 are used.  
Table 2  – Maximum permissible errors of totalised load during use  
Accuracy class  Maximum permissible error of totalised load during use  
0.2 ±0.20  % 
0.5 ±0.50  % 
1 ±1.00  % 
2 ±2.00  % 
 
2.5 Tota lising scale division  
The totalising scale division ( dt) must be within the following range: 0.01  % Max ≤ dt ≤ 0.2  % Max Measure of a General Nature No  0111 -OOP -C050 -15 
4 2.6 Minimum totalised load ( Σmin) 
The minimum totalised load (Σ min) must not be less than the load for which the maximum permissible 
error is equal to a division of the totalising scale ( dt), and must not be less than the minimum load 
rated by the manufacturer. The value of the minimum totalised load Σ min is defined in Table 3.  
Table 3  – Minimum totalised load  
Accuracy class  Σmin must be less than any of the following values:  
0.2 1 000 × dt, and Min  
0.5 400 × dt, and Min  
1 200 × dt, and Min 
2 100 × dt, and Min  
2.7 Zeroing  
Weighing instruments that are not tared each time they are emptied must have a zeroing apparatus. 
Automatic activity must be forbidden if the zero indication differs by:  
a) 1 dt for measuring instruments with an automatic  zeroing apparatus;  
b) 0.5 dt for measuring instruments with a semi -automatic or non -automatic zeroing apparatus.  
3 Technical requirements  
Technical requirements are based on the requirements of the Government Order on Measuring 
Instruments and utilising rele vant requirements of recommendations of - OIML R 107 -1 
Discontinuous totalising automatic weighing instruments (totalising hopper weighers) Part 
1: Metrological and technical requirements – Tests3). 
Measuring instruments of the types approved under the Met rology Act shall be subject to the 
metrological requirements applicable at the time they were put into circulation.  
3.1 To restrict the influence of tilting, loading and operating speed, means must be available to ensure 
that maximum permissible errors wil l not be exceeded under normal operating conditions.  
3.2 Appropriate control equipment must be provided to ensure that the weighing instrument will 
operate within the limits of maximum permissible errors under normal conditions.  
3.3 Every control interface  must be clear and effective for the operator.  
3.4 The operator must be able to verify the integrity of the indicator (if any) . 
3.5 Appropriate means of zeroing the indicator must be available to ensure that the weighing 
instrument will operate within the limits of maximum permissible errors under normal conditions.  
3.6 The design must ensure that the weighing results are not affected by the size of the load that 
remains in the weighing hopper/carrier at the end of a weighing cycle.  
3.7 Automatic operation must be interrupted, recording and printing of results must be prevented, or 
the recording and printout must be marked with a clear warning and a warning signal must be issued in 
the following cases:  
a) if the maximum weighing capacity, Max, has been exceeded  in every weighing range by more 
than 9 di; Measure of a General Nature No  0111 -OOP -C050 -15 
5 b) if this is not the last discrete loading of this transaction and the weighed and released load 
value is less than the minimum weighing capacity, Min.  
3.8 Weighing results must include names or markings of the uni ts of mass in which they are 
expressed. The division value of indicators and printers must be in the form 1  × 10k, 2 × 10k , or 
5 × 10k units, in which the result is expressed, where the index k is a positive or negative whole 
number, or is equal to zero.  
3.9 The measuring units are the kilogram (kg), the tonne (t) or the gram (g).  
3.10 Weighing instruments must be secured against fraudulent use. Components that the user is not 
allowed to disassemble or adjust must be secured to prevent such activity.  
4 Measuring instrument marking  
4.1 Measuring instrument markings  
Weighing instruments must have the following markings:  
– the trademark or name of the manufacturer;  
– the number of the type approval certificate, if available;  
– the temperature range ...... °C / ... ... °C;  
– accuracy class  0.2, 0.5, 1, or 2;  
– maximum weighing capacity  Max = ... g or kg or t;  
– minimum weighing capacity  Min = ... g or kg or t;  
– minimum totalised  Min = ... g or kg or t;  
– totalising scale division  dt = ... g or kg or t.  
The plate bearing manda tory markings must be sealed or must be impossible to remove without 
destroying it.  
4.2 Official mark placement  
Official marks must be placed so that after their installation, the weighing instrument cannot be 
adjusted or components cannot be accessed for  which this is forbidden. Marks must be designed so 
that they cannot be removed without damaging or destroying them.  
Placement of official marks is stipulated in the type approval certificate or the EC type -examination 
certificate or other document or acti vity applied within the context of conformity assessment when 
placing the device on the market and putting it into use.  
5 Measuring instrument type approval  
Automatic weighing instruments - discontinuous totalisers are placed on the market and into service  
with a conformity assessment according to the Government Order on Measuring Instruments, and are 
therefore not subject to type approval.  
6 Initial verification  
During initial verification after measuring instrument repair, a procedure identical to that us ed for 
subsequent verification according to Chapter  7 is applied.  Measure of a General Nature No  0111 -OOP -C050 -15 
6 7 Subsequent verification  
Subsequent verification, i.e. any verification of the measuring instrument conducted after prior 
verification or conformity assessment and, if applicable, verificat ion according to §  11a(1) of the 
Metrology Act, shall be carried out under this measure regardless of whether the instrument was 
placed on the market and put into circulation under the Metrology Act or the Government Order on 
Measuring Instruments.  
The sam e metrological requirements that were decisive in placing a weighing instrument on the 
market will be applied during its verification.  
7.1 Test overview  
Each verification consists of the following actions and tests:  
a) visual inspection;  
b) accuracy test (materi al weighing test).  
7.2 Visual inspection  
The following are assessed during a visual inspection of a discontinuous totalising weighing 
instrument:  
– that the measuring instrument presented for verification complies with the approved type or 
design of the meas uring instrument for which conformity was declared in the context of its 
placement on the market, and markings according to Chapter  4 must be checked;  
– the measuring instrument is not mechanically damaged and its metal parts do not have traces 
of corrosion that could have an adverse effect on instrument function.  
If the measuring instrument fails to meet visual inspection requirements, no further tests are 
performed.  
7.3 Test conditions and equipment  
7.3.1  The weighing instrument must be complete and install ed in a position for intended use under 
typical operating conditions. Tests must be performed using a product or products that are or will be 
weighed during operation.  
7.3.2  At least three material tests will be performed, one at Max, one at Min and one at  a value near 
the minimum totalised weight according to Table 3.  
The material used for tests shall be chosen to represent the range and type of product for which the 
weighing instrument is intended.  
Each test is performed at the maximum rate of weighing cy cles per hour.  
At least five weighing cycles are performed during each test.  
7.3.3  Test equipment - a reference weighing instrument must permit the true mass value of every 
test load to be determined with an accuracy of at least 1/3 applicable to the maxim um permissible error 
for automatic weighing listed in Table 1.  
7.3.4  If necessary, the reference weighing instrument must be checked immediately after the tests 
are performed to determine whether its characteristics have not changed. If the reference weigh ing 
instrument does not have a suitable division size, suitable resolution can be ensured using auxiliary 
loads to determine the tipping point. It must be ensured that the reference weighing instrument can be 
used to weigh every test load of the given prod uct. Measure of a General Nature No  0111 -OOP -C050 -15 
7 7.4 Accuracy test - material test  
During an accuracy test using weighed material, the following steps are followed:  
a) Automatic weighing mode is turned on, including surrounding equipment that is usually used 
in the installation location during weighing ins trument operation.  
b) Five weighing cycles are initiated in a manner that ensures normal operating conditions.  
c) Automatic weighing mode is turned off and the total load value is recorded.  
d) Automatic weighing mode is turned on for every test as described in Arti cle 7.4, wherein it 
must be ensured that the material used for the tests can be weighed on the reference weighing 
instrument.  
e) Automatic weighing mode is turned off and the final total load value is recorded.  
f) The total load value is determined from the diff erence of the values obtained in steps c) and e).  
g) The above steps are repeated for further tests.  
h) The material test error is determined from the difference between the indicated total load 
determined according to 6) and the valued determined on the referen ce weighing instrument.  
Each result is compared to the value that corresponds to the maximum permitted error listed in 
Article  2.4.1 for verification or Article  2.4.2 for checking weighing instruments in operation or re -
testing of a specified measuring ins trument according to §  11a(1) of the Metrology Act.  
8 Notified standards  
For the purposes of specifying metrological and technical requirements for measuring instruments and 
specifying test methods for verification arising from this Measure of a General Na ture, the CMI shall 
provide notification of Czech technical standards, other technical standards, or technical documents of 
international or foreign organisations, or other technical documents containing more detailed technical 
requirements (hereinafter “n otified standards”). The CMI shall publish a list of these notified standards 
attached to the relevant measures, together with the Measure of a General Nature, in a manner 
accessible to the public (on www.cmi.cz ). 
Complian ce with notified standards or parts thereof shall be considered, to the extent and under the 
conditions laid down in a Measure of a General Nature, as compliance with those requirements laid 
down in this measure to which these standards or parts thereof ap ply. 
 
 
II. 
JUSTIFICATION  
The CMI issues, under §  14(1)(j) of the Metrology Act, towards the implementation of §§  9(1), 9(9) 
and 11a(3) of the Metrology Act, this Measure of a General Nature, stipulating metrological and 
technical requirements for specifie d measuring devices and test methods for verification of these 
specified measuring devices.  
In Decree No  345/2002, specifying measuring instruments for mandatory verification and measuring 
instruments subject to type approval, as amended, the annex "List o f Specified Measuring Device 
Types" classifies automatic weighing instruments under item 2.1.3, and gravimetric filling and catch 
weighers under e) as measuring instruments subject to type approval and verification.  
The CMI thus issues, towards the impleme ntation of §§  9(1), 9(9) and 11a(3) of the Metrology Act, 
for the measuring instrument type specified as "automatic weighing instruments – discontinuous 
totalisers ", this Measure of a General Nature, stipulating metrological and technical requirements for Measure of a General Nature No  0111 -OOP -C050 -15 
8 automatic weighing instruments – discontinuous totalisers  and test methods for type approval and 
verification of these specified measuring instruments.  
This regulation (Measure of a General Nature) has been notified according to Directive  98/34/EC of 
the E uropean Parliament and of the Council of 22  June 1998 on the procedure for providing 
information in the field of technical standards and regulations and of rules on Information Society 
services, as amended.  
 
 
III. 
INSTRUCTIONS  
A Measure of a General Nature  cannot be appealed (§  173(2) of the Administrative Code).  
According to §  172(5) of the Administrative Code, a decision on objections cannot be appealed.  
Compliance of the Measure of a General Nature with legislation may be subject to a review process 
unde r §§ 94 to 96 of the Administrative Code. A party to the proceedings may initiate review 
proceedings to be conducted by the administrative authority that issued this Measure of a General 
Nature. If the administrative authority finds no reason to commence r eview proceedings, it shall 
communicate and provide grounds for this to the submitter within 30 days. According to §  174(2) of 
the Administrative Code, a ruling on the commencement of review proceedings can be issued within 
three years of the effective dat e of the Measure of a General Nature.  
 
 
IV. 
EFFECTIVE DATE  
This General Measure takes effect on the 15th day following the date of its publication (§  24d of the 
Metrology Act).  
...…………………………..............  
RNDr. Pavel Klenovský  
Director General