Czech Metrology Institute  
 
Okružní 31, 638 00 Brno  
 
1. ------IND- 2015 0530 CZ - EN- ------ 20151005 --- --- 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 61 -1. 
Some parameters specified in this document are properties of measuring instruments in new condition 
and are provided only because the preservation of these proper ties when the instrument is in use is 
subject to visual or other checks in the context of verification.  
(End of executive summary.)  
Ref. No: 0313/004/15/Pos.  
Contact person: Ing. Miroslav Pospíšil  
Telephone: 545  555 135, -131 
As the authority with substan tive 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 the “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 -C053 -15 
Ref. No  0313/004/15/Pos.,  
 
laying down metrological and technical req uirements for legal measuring instruments, 
including the tests for the verification of legal measuring instruments:  
“automatic weighing instruments – gravimetric filling instruments”  General Measure No  0111 -OOP -C053 -15 
2  
This General Measure lays down the metrological and technical requiremen ts for automatic weighing 
instruments – gravimetric filling instruments to be applied when verifying these instruments after they 
have been placed on the market or put into use. These requirements comply with the requirements of 
Government Regulation 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 automatic weighing ins truments 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 metrological 
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 weighing device  serving to determine the mass of a body, liquid or dry material by using the action 
of gravity on that body, liquid or dry material  
1.2 
automatic weighing instrument  
a weighing device that weighs without the intervention of an operator and/or follows a pr edetermined 
programme of automatic processes characteristic of the weighing instrument  
1.3 
automatic gravimetric filling instrument  
an automatic weighing device that fills containers with a predetermined and virtually constant mass of 
product from bulk  
1.4 
maximum permissible deviation of each fill  
maximum permissible deviation of each fill from the average value of all the fills of a test sequence  
2 Metrological requirements  
The metrological requirements are based on the requirements of the Government Regu lation on 
Measuring Instruments, applying the relevant requirements under OIML Recommendation R 61 -1 
Automatic gravimetric filling instruments – Part 1: Metrological and technical requirements – Tests 3). 
The verification of measuring instruments type appr oved 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 Governmen t 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) are part of the technical harmonisation 
compendium “Terminology in the Area of Metrology”, which is publicly accessible at www.unmz.cz.  
3)   OIML  R 61-1 “Automatic gravimetric fi lling instruments  –  Part 1: Metrological and technical requirements  – 
Tests” – publicly available at  www.oiml.org  General Measure No  0111 -OOP -C053 -15 
3 2.1 Rated operating conditions  
The rated operating conditions shall be established by the manuf acturer 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 term s of the maximum and minimum capacity.  
2.3 Accuracy classes  
2.3.1  The reference accuracy classes Ref ( x) and operational accuracy class(es) X( x) of the 
gravimetric filling instrument shall be specified by the manufacturer.  
2.3.2   An instrument type is desi gnated a reference accuracy class, Ref( x), corresponding to the best 
possible accuracy for instruments of the type.  After installation, individual instruments are designated 
for one or more operational accuracy classes, X( x), having taken account of the sp ecific products to be 
weighed.  The class designation factor ( x) shall be ≤  2, and in the form 1 × 10k, 2 × 10k or 5 × 10k, 
where k is a negative whole number or zero.  
2.3.3  The reference accuracy class, Ref ( x), shall be applicable for static loads.  
2.3.4  For the operational accuracy class X( x), X is a regime relating accuracy to load weight and ( x) 
is a multiplier for the limits of error specified for class X(1) in Article  2.4.1.  
2.4 Maximum permissible errors  
2.4.1  Mass deviation from average fill  
Table  1 – Mass deviation from average fill in verification  
Value of the  mass, m (g), of the fill  Maximum permissible deviation of each 
fill from the average for class  X(1)  
m  50 7.2 % 
50  m  100 3.6 g 
100  m  200 3.6 % 
200  m  300 7.2 g 
300  m  500 2.4 % 
500  m  1 000 12 g 
1 000  m  10 000 1.2 % 
10 000  m  15 000 120 g 
15 000  m 0.8 % 
NOTE  The calculated deviation of each fill from the average may be adjusted to 
take account for the effect of material particle size.  
 
2.4.2  Maximum permissible in -service errors  General Measure No  0111 -OOP -C053 -15 
4 When inspecting weighing instruments in service or carrying out verification of legal measuring 
instruments in accordance with §  11a(1) of the Metrology Act at the 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 – Mass deviation from average fill in service  
Value of the mass, m (g), of the fill  Maximum permissible deviation of each fill 
from the average for class  X(1)  
m  50 9 % 
50  m  100 4.5 g 
100  m  200 4.5 % 
200  m  300 9 g 
300  m  500 3 % 
500  m  1 000 15 g 
1 000  m  10 000 1.5 % 
10 000  m  15 000 150 g 
15 000  m 1 % 
NOTE  The calculated deviation of each fill from the average may be adjusted to take 
account for the effect of material particle size.  
 
2.4.3  Error relative to pre -set value (setting error)  
For weighing instruments where it is possible to pre -set a fill weight, the maximum difference between 
the pre -set value and the average mass of the fills shall not exceed 0.312 of the maximum permissible 
deviat ion of each fill from the average referred to in Table  1. 
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 61 -1 
Automatic gravimetric filling instruments – Part 1: Metrological and technical requirements – Tests 3). 
The verification of measuring instruments type approved prior to the entry into force of the Metrology 
Act shall be subject to the metrological r equirements applicable at the time they were put into 
circulation.  
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 hand ling 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 clear and effective.  
3.4 The integrity of the display (where present) shall be verifia ble 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.  General Measure No  0111 -OOP -C053 -15 
5 3.6 Weighing results shall contain the names or symbols of the units of mass in which th ey are 
expressed. The scale intervals of the indicating and printing devices shall be in the form of 1  × 10k, 
2 × 10k or 5 × 10k of units in which the result is expressed, where k is a positive or negative whole 
number or zero.  
3.7 The units of measurement  shall be the kilogram (kg), tonne (t), milligram (mg), gram (g) and the 
metric carat (ct).  
3.8 Weighing instruments shall be proofed against fraudulent use. Components that may not be 
dismantled or adjusted by the user shall be secured against such action s. 
4 Instrument markings  
4.1 Markings on the instrument  
The instruments shall bear the following markings:  
– trademark or name of the manufacturer;  
– the number of the type approval certificate, if any;  
– the accuracy class in the form:  X(x);  
– the reference accu racy class in the form  Ref (x);  
– scale interval in the form:  d = … ;  
– maximum capacity, in the form:  Max…;  
– minimum capacity, in the form:  Min…..;  
– maximum additive tare in the form:  T = +…..;  
– maximum subtractive tare in the form:  T = –…..; 
– product design ation;  
– temperature range ...... °C / ...... °C;  
– electrical supply: ...... V;  
– electrical supply frequency: ….  Hz; 
– pneumatic/hydraulic pressure (if applicable) in the form: ….. kPa or bar;  
– average number of loads/fills (if applicable);  
– maximum fill value (if  applicable) in the form  Maxfill…..;  
– rated minimum fill value (if applicable) in the form: Minfill;  
– maximum rate of operation (if applicable) in the form: ……loads per minute.  
The label bearing the compulsory markings shall be sealed unless it cannot be rem oved 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 m arks 
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 provisio ns applied within the context of conformity 
assessment when placing the device on the market and putting it into use.  General Measure No  0111 -OOP -C053 -15 
6 5 Type approval of measuring instruments  
Automatic weighing instruments – gravimetric filling instruments shall be placed on the market an d 
put into use after conformity assessment in accordance with the Government Regulation on Measuring 
Instruments.  
6 Initial verification  
A procedure identical to that used for follow -up verification referred to in Chapter  7 shall be applied in 
initial veri fication.  
7 Follow -up verification  
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 with this measure regardless of whether the 
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 i nstruments shall be subject to the 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) accurac y test (material weighing test).  
7.2 Visual inspection  
The purpose of visual inspection of the filling instrument shall be to check that:  
– the measuring instrument presented for verification complies with the approved type or design 
of the measuring instrum ent for which conformity was declared in the context of its placement 
on the market, while attention 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 trace s 
of corrosion that could have an adverse effect on the function of the instrument.  
If the measuring instrument fails to meet the visual inspection requirements, no further tests are 
performed.  
7.3 Test conditions and equipment  
7.3.1  The weighing instrumen t shall be fully assembled and fixed in the position in which it is 
intended to be used under typical in -service conditions. The tests shall be carried out in the scope 
given by the descriptive markings using the product(s) that are or are intended to be w eighed when the 
instrument is in service.  
7.3.2  The tests shall be carried out at, or near to, the Max value and at, or near to, the Minfill value.  
In the case of cumulative weighers, the above tests shall be carried out with the maximum practical 
number o f loads per fill and with the minimum number of loads per fill.  
In the case of selective combination weighers, the tests shall be carried out with the average or 
optimum number of loads per fill.  General Measure No  0111 -OOP -C053 -15 
7 7.3.3  If the Minfill value is less than one  third of the Max fill then tests shall also be carried out near 
the centre of the load weighing range preferably at a value close to, but not above, 100  g, 300  g, 
1 000 g or 15  000 g (as appropriate).  
7.3.4  Prior to the start of a new test, for a time period the weighing i nstrument shall be operated 
under normal operating conditions to enable stability.  
Automatic zero -setting and other corrective devices shall be in operation during the tests, in 
accordance with the manufacturer’s instructions.  
7.3.5  The minimum number of i ndividual test fills depends upon the pre -set value FP referred to in 
Table  3. 
Table  3 - Number of test fills  
Pre-set value of the fills, Fp (kg) Minimum number of test fills, n 
Fp ≤ 1 kg 
1 kg < Fp ≤ 10 kg 
10 kg < Fp ≤25 kg 
25 kg < Fp 60 fills  
30 fills  
20 fills  
10 fills  
 
7.3.6  Test equipment – the control weighing instrument shall make it possible to determine the true 
weight of each test fill to an error not greater than 1/3 of the relevant maximum permissible deviation 
(MPD) and error (MPE) 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. Where the control wei ghing instrument does not have a 
suitable scale interval, suitable resolution may be obtained by using additional weights to determine 
the changeover point. It must be ensured that the control weighing instrument can be used to weigh 
any test fills of the given product.  
7.4 Accuracy test – material test  
When carrying out an accuracy test using the weighed material, the steps below shall be followed:  
a) Measurement is taken as referred to in Article  7.3. 
b) The pre -set fill value is recorded (if applicable).  
c) The t est load is weighed using a control weighing instrument and the result is considered as 
the conventional mass value of each test fill.  
d) The average value of all test fills is calculated and recorded.  
e) The automatic weighing deviation, which is compared with the maximum permissible values 
in Table  1, shall be the difference between the conventional value of the test fill and the 
average value of all test fills.  
f) The pre -set value error, which is compared with the maximum permissible values, shall be the 
differe nce between the average of the conventional mass values of the test fills and the pre -set 
fill value.  
Measurement errors shall not exceed the relevant maximum permissible errors for the given category 
of weighing instruments under Article  2.4.1 for verific ations 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. 
8 Notified standards  General Measure No  0111 -OOP -C053 -15 
8 For the purposes of specifying the metrological and technical requirements for mea suring instruments 
and the verification methods arising from this General Measure, the CMI shall provide notification of 
the Czech technical standards, other technical standards or technical documents of international or 
foreign organisations, or other tec hnical 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 considered, 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 metrological and technical requirements for 
legal measuring instruments and tests for the verification of these legal m easuring instruments in 
accordance with §  14(1)(j) of the Metrology Act to implement §  9(1), §  9(9) and  § 11a(3) of the 
Metrology Act.  
Under (e) 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 approval, as amended, filling 
instruments and catchweighers 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 – 
gravimetric filling instruments” laying down th e metrological and technical requirements for 
automatic weighing instruments – gravimetric filling instruments and the tests for the verification of 
these legal measuring instruments.  
This legislation (General Measure) was notified in accordance with Europ ean 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 wit h § 173(2) of the CAP, no appeals may be made regarding general measures.  
In accordance with the provisions of §  172(5) of the 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 of the 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.  
 
 General Measure No  0111 -OOP -C053 -15 
9 IV. 
E N T R Y  I N T O  F O R C E  
This general measure shall enter into force on the fifteenth day as of its date of publication (§  24d of 
the Metrology Act).  
...…………………………..............  
RNDr. Pavel Klenovský  
Director General