UGANDA STANDARD  
  FDUS 1030  
Second  Edition  
2013-mm-dd 
 
 
 Reference number  
FDUS 1030 : 2013 
© UNBS 2013  
  
Quantity of product in prepackages  
 FDUS 1030 : 2013 
ii © UNBS 2013 – All rights reserved  
 Compliance with this standard does not, of itself confer immunity from legal obligations  
A Uganda Standard does not purport to include all necessary provisions of a contract. Users are 
responsible for its correct appli cation  
© UNBS 2012   
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilised in any 
form or by any means, electronic or mechanical, including photocopying and microfilm, without prior written 
permission fro m UNBS.  
Requests for permission to reproduce this document should be addressed to  
The Executive Director  
Uganda National Bureau of Standards  
P.O. Box 6329  
Kampala  
Uganda  
Tel: 256 41 4 505 995  
Fax: 256 41 4 286 123  
E-mail: unbs@infocom.co.ug  
Web: www.unbs.go.ug  FDUS 1030 :2013 
© UNBS 2013 – All rights reserved  iii 
 Contents  Page 
1 Scope  ................................ ................................ ................................ ................................ ......................  1 
2 Terms and definitions  ................................ ................................ ................................ ...........................  1 
3 Metrological requirements for a prepackage  ................................ ................................ .....................  3 
3.1 General  ................................ ................................ ................................ ................................ ...................  3 
3.2 Average requirement ................................ ................................ ................................ .............................  3 
3.3 Individual prepackage requirement  ................................ ................................ ................................ ..... 3 
4 Reference test for metrological requirements  ................................ ................................ ...................  3 
4.1 General  ................................ ................................ ................................ ................................ ...................  3 
4.2 Statistical and general principles of control  ................................ ................................ ......................  3 
4.2.1  Criteria  ................................ ................................ ................................ ................................ ....................  3 
4.2.2  Significance level of the tests for the Type I Risk [1]  ................................ ................................ ........  4 
4.2.3  Significance level of the tests for the Type II Risk [1]  ................................ ................................ ....... 4 
4.3 Characteristics of the sampling plans used in market surveillance by legal metrology 
officials  ................................ ................................ ................................ ................................ ...................  4 
4.3.1  General  ................................ ................................ ................................ ................................ ...................  4 
4.3.2  Inspections carried out on the premises of the packer  ................................ ................................ ..... 4 
4.3.3  Inspection lot and sampling characteristics  ................................ ................................ ......................  5 
4.3.4  Tolerable deficiencies  ................................ ................................ ................................ ...........................  5 
Annex  A (informative)  Outline of examination procedure  ................................ ................................ ............  7 
A.1 General  ................................ ................................ ................................ ................................ ...................  7 
A.2 Procedure  ................................ ................................ ................................ ................................ ...............  7 
Annex  B (normative)  Tare procedures  ................................ ................................ ................................ ............  9 
B.1 General  ................................ ................................ ................................ ................................ ...................  9 
B.2 Terminology  ................................ ................................ ................................ ................................ ...........  9 
B.3 Procedure  ................................ ................................ ................................ ................................ ...............  9 
Annex C (informative)  Drained quan tity of products packed in a liquid medium  ................................ .... 10 
C.1 General  ................................ ................................ ................................ ................................ .................  10 
C.2 Terminology  ................................ ................................ ................................ ................................ .........  10 
C.3 Procedure for determining the actual quantity of product  ................................ .............................  11 
C.4 Apparatus  ................................ ................................ ................................ ................................ .............  11 
C.5 Determining the actual quan tity of product of a sample  ................................ ................................ . 11 
C.6 Recommended periods of time for checking drained weight  ................................ .........................  11 
Annex D (informative)  Test proced ures for determining the actual quantity of frozen products  ...........  13 
D.1 Frozen fruits and vegetables  ................................ ................................ ................................ ..............  13 
D.2 Glazed seafood (seafood t hat is covered with a film of water and then frozen to preserve 
its quality)  ................................ ................................ ................................ ................................ .............  13 
D.3 Frozen shrimp and crabmeat  ................................ ................................ ................................ .............  13 
Annex E (infor mative)  Prohibition of misleading prepackages  ................................ ................................ .. 14 
E.1 General  ................................ ................................ ................................ ................................ .................  14 
E.2 Terminology  ................................ ................................ ................................ ................................ .........  14 
E.3 Aerosol dispensers  ................................ ................................ ................................ .............................  14 
 FDUS 1030 : 2013 
iv © UNBS 2013 – All rights reserved  
 Foreword  
Uganda National Bureau of Standards (UNBS) is a parastatal under the Ministry of Tourism, Trade and 
Industry established under Cap 327 , of the Laws of Uganda.  UNBS is mandated to co -ordinate the 
elaboration of standards and is  
(a) a member of International Organisation for Standardisation (ISO) and  
(b) a contact point for the WHO/FAO Codex Alimentarius Commission on Food Standards, and  
(c) the National Enquiry Point on TBT/SPS A greements of the World Trade Organisation (WTO).  
The work of preparing Uganda Standards is carried out through Technical Committees. A Technical 
Committee is established to deliberate on standards in a given field or area and consists of representatives of  
consumers, traders, academicians, manufacturers, government and other stakeholders.  
Draft Uganda Standards adopted by the Technical Committee are widely circulated to stakeholders and the 
general public for comments. The committee reviews the comments bef ore recommending the draft standards 
for approval and declaration as Uganda Standards by the National Standards Council.  
Committee membership  
The following organizations were represented on the Metrology  standards Technical Committee (UNBS/TC 9), 
during th e development of this standard:  
 Civil Aviation Authority.  
 Kampala City Traders Association  
 Kyambogo University Kampala  
 Makerere University Kampala  
 Ministry of Defense  
 Ministry of Energy  
 Ministry of Health  
 Ministry of Internal Affairs  
 Ministry of Works and Transport  
 National Environmental Management Authority  
 Uganda National Bureau of Standards  
 UMEME  
 UGANDA STANDARD  FDUS 1030 : 2013 
 
© UNBS 2013 – All rights reserved  1 
 Quantity of product in prepackages  
1 Scope  
This Final Draft Uganda Standards specifies the  legal metrology requirements for prepackaged products (also 
called prepackaged commodities or prepackaged goods) label led in predetermined constant nominal 
quantities of weight, volume, linear measure, area, or count; and sampling plans and procedures for use by 
legal metrology officials in verifying the quantity of produ ct in prepackages.  
NOTE  The sampling plans are not for use in the quantity control processes of prepackagers . 
Informative annexes include an examination procedure outline, procedures for determining average tare 
weight, the drained quantity of products in liquid medium, and the actual quantity of frozen products. Also 
included is a mandatory annex on misleading prepackages.  
2 Term s and definitions  
2.1  
actual quantity  
actual quantity of product that a prepackage in fact contains as determined by measurement s ma de by legal 
metrology officials  
2.2 
average error  
sum of individual prepackage errors considering their arithmetic sign divided by the number o f prepackages in 
the sample [1]  
2.3  
content of a prepackage  
quan tity of product in a prepackage  
2.4  
inadequ ate prepackage (also called a non-conforming prepackage ) 
prepackage with an individual prepackage error (see 2.5) less than the nominal quantity (also called a  
negative error).  
2.4.1  
T1 error  
an inadequate prepackage found to contain an actual quantity les s than the nominal quantity minus the 
tolerable deficiency allowed in 4.3.4 for the nominal quantity is called a T1 error. T1 error: Actual contents < 
(Qn T) 
2.4.2  
T2 error  
an inadequate prepackage found to contain an actual quantity less than the nominal quantity minus twice the 
tolerable deficiency for a nominal quantity allowed in 4.2.3 is called a T2 error. T2 error : Actual contents < (Qn 
T2). FDUS 1030 : 2013 
2 © UNBS 2013 – All rights reserved  
 2.5  
individual prepackage error  
difference between the actual quantity of product in a prep ackage and its nominal quantity  
2.6  
inspection lot (batch ) 
definite quantity of prepackages produced at one time under conditions that are presumed to be uniform and 
from which a sample is drawn and inspected to determine conformance with specified criteria for acceptance 
or rejection o f the inspection lot as a whole  
2.7  
misleading prepackage  
prepackage that is made, formed, presented, marked or filled in any way that ma y mislead a consumer about 
the quanti ty of contents that it contains  
2.8  
nominal quantity  
quantity of product in a prepackage declar ed on the label by the packager  
NOTE 1  The symbol „ Qn‟ is used to designate the nominal quantity.  
NOTE 2  The nominal quanti ty should  be declared in accordance with US 1028 . 
2.9  
packing material  (also called individual package, tare, packaging or packaging material)  
everything of the prepackage that is intended to be left over after use of the product, except for items natural ly 
in the product. Use includes consumption or subjecting to a treatment.  
NOTE  Packing material is generally used to contain, protect, handle, deliver, preserve, transport, inform about and 
serve as an aid ( for example,  food serving tray) while using the p roduct it contains . 
2.10  
prepackage  
combination of a product and the packing ma terial in which it is prepacked  
2.11  
prepackaged product  
single item for presentation as such to a consumer, consisting of a product and the packing material into 
which it was  put before being offered for sale and in which the quantity of product has a predetermined value, 
whether the packing material encloses the product completely or only partially, but in any case in such a way 
that the actual quantity of product cannot be a ltered without the packing material either being opened or 
underg oing a perceptible modification  
2.12  
random sampling  
sample prepackages are chosen randomly ( that is, they all have the same probability to be included in the 
sample)  
2.13  
sample size  
prepackages taken from an inspection lot and used to provide information that will serve as the basis for a 
decision on the conformance of the inspection lot.  
NOTE  The symbol ‘n’ means sample size . 
2.14  
tolerable deficiency (also called the tolerable negative error)  
deficiency in the quantity of product permitted in a prepackage. See 4.3.4, 2.1 and 2.4 . 
NOTE  The symbol „ T‟ means tolerable deficiency.  FDUS 1030 : 2013 
© UNBS 2013 – All rights reserved  3 
 3 Metrological requirements for a prepackage  
3.1 General  
A prepackage shall meet the requirements below at any l evel of distribution including at the point -of-pack, 
import, distribution and wholesale transactions, and sale ( for example,  where a prepackage is offered or 
exposed for sale or sold).  
3.2 Average requirement  
The average actual quantity of product in a pre package in an inspection lot shall be at least equal to the 
nominal quantity. The criteria in Clause 4 shall be met if the average actual quantity of product in a 
prepackage of an inspection lot is estimated by sampling . 
3.3 Individual prepackage requireme nt 
The actual quantity of product in a prepackage shall accurately reflect the nominal quantity but reasonable 
deviations shall be allowed ( see 4.3 .4). An inspection lot shall be rejected if it contains:  
 more prepackages that exceed the tolerable deficien cies (see 2.4.1) than allowed in column 4 of 
Table 1; or   
 one or more inadequate prepackages that are T2 errors (see 2.4.2 and 4.3.4). 
4 Reference test for metrological requirements  
4.1 General  
Legal metrology officials shall conduct tests to determine if  prepackages comply with the requirements of this 
and other Standard s (for example,  US 1028)  The tests may be performed in accordance with quality 
acceptance inspection by sampling prepackages at any level of distribution including at the point -of pack, 
import, distribution and wholesale transactions, and sale. The expanded uncertainties at the 95 % confidence 
level associated with measuring instruments and test methods used for determining quantities shall not 
exceed 0.2 T. Examples of the source of uncert ainty include the maximum permissible error and repeatability 
in weighing and measuring instruments, variations in prepackage materials, and fluctuations in density 
determinations caused by the differing amounts of solids in the liquid or temperature chang es. This standard  
does not preclude a legal metrology official from conducting any other test at any level of distribution for the 
purpose of verifying that prepackages meet the requirements of this or any other standard s. Legal metrology 
officials may per mit reasonable deviations in the quantity of product ( that is,  hygroscopic products) caused by 
ordinary and customary exposure to environmental conditions that occur in storage and distribution in the 
evaluation of both the average and individual prepackag e requirements . 
4.2 Statistical and general principles of control  
4.2.1 Criteria  
The tests for acceptance or rejection of inspection lots shall take three parameters into consideration:   
 the average error of the quantity of product in a prepackage in the sample;  
 the percentage of prepackages in the sample that contain a quantity of product less than Qn – T is 
less than 2.5 % (also called a T1 error). This is equal to the requirement that an inspection lot shall be 
rejected if the sample includes more inad equate prepackages which contain a quantity of product less 
than Qn – T than permitted in column 4 of Table 1 (called a T1 error); and  FDUS 1030 : 2013 
4 © UNBS 2013 – All rights reserved  
  that an inspection lot must be rejected if one or more inadequate prepackages in the sample contains 
a quantity of produc t less than Qn – T2 (called a T2 error).  
An inspection lot is:  
 accepted if it satisfies the requirements fixed for the three parameters above; or   
 rejected if it does not satisfy one or more of the requirements . 
4.2.2 Significance level of the tests for the Type I Risk [1]  
The significance level (the value which is the upper limit of this type of error) shall be 0.005. The tests shall 
determine if the average of the quantity of product in a prepackage has a one -sided significance level of 99.5 
% using co efficients as derived from Student‟s t distribution:  
αp ≤ 
 μ = Qn  
That is, the probability of rejecting a correctly filled  inspection lot with μ = Qn shall not exceed 0.5 %.   
The test for Type I Risk [1] shall have a significance  level αp of:  
αp ≤ 
   
that is, the probability (p) of rejecting a inspection lot  containing 2.5 % of inadequate prepackages shall not   
exceed 5 %.  
4.2.3 Significance level of the tests for the Type II Risk [1]  
In at least 90 % of the cases the tests sh all detect inspection lots:  
 for which the average fill is less than ( Qn – 0.74 σ) where σ 
quantity of product in the prepackages of the inspection lot; and  
 which contain 9 % of inadequate prepackages.  
4.3 Character istics of the sampling plans used in market surveillance by legal metrology 
officials  
4.3.1  General  
Inspection lots shall be assumed to be homogeneous if there is no indication to the contrary. Sample 
prepackages shall be selected using random sampling . 
4.3.2 Inspections carried out on the premises of the packer  
An inspection lot taken from the production line shall consist of all prepackages not rejected by a checking 
system. Care shall be taken to prevent other than normal operating adjustments or other corrective actions in 
the production and prepackage filling process. Sample prepackages shall be collected after the point of final 
checking by the packer. When sample prepackages are : 
a) Collected from the production line: the size of the inspection lot shal l be equal to the maximum hourly 
output of the production line without any restriction as to the inspection lot size;  
b) Not collected from the production line at the premises of the packer, and when  the production line 
output :   FDUS 1030 : 2013 
© UNBS 2013 – All rights reserved  5 
 i) exceeds 10 000 prepackages pe r hour: the size of the inspection lot shall be equal to the 
maximum hourly output of the production line without any restriction as to the inspection lot size; 
or 
ii) is 10 000 or fewer prepackages per hour: the inspection lot size shall not exceed 10 000 
prepackages.  
4.3.3 Inspection lot and sampling characteristics  
See Table 1.  
4.3.4 Tolerable deficiencies  
For all prepackages, the tolerable deficiencies (T) are specified in Table 2 (see also 2.4). No prepackage shall 
have a negative error greater than twice the tolerable deficiency ( T2) specified in the previous paragraph. ( see 
2.4 and 3.2 regarding the  disposition of an inspection lot).  
Table 1  — Sampling plans for prepackages  
Inspection  
lot size  Sample  size 
(n) Sample correction factor  
(t1-α) 
n1  Number of prepackages in 
a sample allowed to 
exceed the tolerable 
deficiencies in 4.3 .4 (see 
also 2.4.1 ) 
100 to 500  50 0.379  3 
501 to 3200  80 0.295  5 
> 3 200 125 0.234  7 
 FDUS 1030 : 2013 
6 © UNBS 2013 – All rights reserved  
 Table 2 —Tolerable deficiencies in actual content for prepackages  
Nominal quantity of product  
(Qn) in g or mL  Tolerable deficiency (T) a 
Percent of Qn g or mL  
0 to 50  9 - 
50 to 100  - 4.5 
100 to 200  4.5 - 
200 to 300  - 9 
300 to 500  3 - 
500 to 1000  - 15 
1000 to 10000  1.5 - 
10000 to 15000  - 150 
15000 to 50000  1 - 
a T values are to be rounded up to the next 1/10 of a g or mL for Qn 1 000 g or mL and to the next  whole g or mL for Qn > 1 000 g or mL.  
 
Nominal quantity of product  
(Qn) in length  Percent of Qn 
 
Qn  ≤ 5 m No tolerable deficiency allowed  
Qn > 5 m  2 
 
Nominal quantity of product  
(Qn) in area  Percent of Qn 
 
All Qn 3 
 
Nominal quantity of product  
(Qn) in count  Percent of Qn 
 
Qn 
 
  No tolerable deficiency allowed  
Qn  > 50 items  1 b 
b Compute the value of T by multiplying the nominal quanti ty by 1 % and rounding the result up to the next  whole number. The value may 
be larger than 1 % due to the rounding but this is accepted because the  products are whole items and cannot be divided.  
 FDUS 1030 : 2013 
© UNBS 2013 – All rights reserved  7 
 Annex  A 
(informative)  
 
Outline of examination procedure  
A.1 General  
This outline may be used to develop test procedures for checking the quantity of product in prepackages to 
ensure compliance with Clause 3 . 
A.2 Procedure  
A.2.1  Define the inspection lot according to 4. 3. 
A.2.2  Determine a sample size appropriate  for the inspection lot from column 1 of Table 1.  
A.2.3  Determine the tolerable deficiency (T) appropriate for the nominal quantity of the prepackages 
according to 4.3 .4. 
A.2.4  Determine the number of prepackages allowed to exceed the tolerable deficiency from column  4 of 
Table 1.  
A.2.5  Measure (see notes below) and record the gross weight for each prepackage to be opened for tare 
determination. Determine the average tare weight using the procedures in  Annex B . 
NOTE 1  This step is followed only when gravime tric testing is used.  
NOTE 2  Packages with protective gas or vacuum packages sh ould be opened before weighing.  
A.2.6  Determine the individual prepackage error using either i) or ii) below : 
i) if gravimetric testing is used, compute the calculated gross weight  (CGW) that may be used for computing 
individual prepackage errors as follows ( see Note 1):  
CGW = Average weight of the packing material + Nominal quantity of product in the prepackage ( see 
Note 2).  
Determine individual prepackage errors by subtracting t he CGW from the actual gross weight of each 
prepackage.  
Individual prepackage error = Actual gross weight – CGW  
NOTE 1  This method is only a recommendation; any accurate method of computing individual prepackage errors (e.g. 
ii) below) is acceptable.  
NOTE  2 When gravimetric testing is used to determine the actual contents of prepackages of fluids labeled in units of 
volume, the nominal quantity of liquid product in the prepackage is the nominal volume multiplied by the density of a 
measured volume of the l iquid at a reference temperature. The internationally recommended temperature is 20 °C for the 
volume declaration of liquids that are not frozen .  
When a gravimetric method of test related  to weights of a density of 8.0 g/mL is used, a  quantity of product 
expressed in units of  volume can be calculated practically using  the formula below:  FDUS 1030 : 2013 
8 © UNBS 2013 – All rights reserved  
 
0.00120.9985

density Liquidproducttheof WeightVolum e 
ii) Determine the actual quantity of the product and subtract from it the nominal quantity ( Qn) of product to 
calculate the individual prepackage error.  
A.2.7  Determine if the test results meet the individual prepackage requirement. Compare each negative 
individual prepackage requirement. Compare each negative individual prepackage error obtained in step 6 
above to the values for T in 4.3 .4. 
i) If the absolu te value of a negative individual prepackage error is greater than the tolerable deficiency 
specified in 4.3 .4, a prepackage is inadequate (see 2.4).  
ii) If the number of inadequate prepackages exceeds the total permitted in column 4 of Table 1, or if any 
inadequate prepackage with a negative individual prepackage error greater than T2 (see 2.4) is found, 
the sample fails the individual prepackage requirement. If the sample meets these requirements, 
proceed to the next step.  
A.2.8 Determine if the test results meet the average prepackage requirement. To calculate the total 
prepackage error (TPE), sum the individual prepackage errors obtained in A.2.6 . Divide the TPE by the 
sample size to calculate the average error (AE). If the AE is a positive number, the sampl e (inspection lot) 
passes. If the AE is a negative number, calculate the sample error limit (SEL) as follows : 
a) compute the sample standard deviation.  
b) compute the sample error limit (SEL) by multiplying the sample standard deviation (s) times the 
sample corr ection factor (SCF) shown in column 3 of Table 1 for the sample size in column 2.  
SEL = Sample standard deviation (s) x 
  
c) add the SEL to the AE :  
 If the sum is a positive number, the sample (a nd inspection lot) passes; or  
 If the sum is a negative number, the sample (and inspection lot) fails.  
 FDUS 1030 : 2013 
© UNBS 2013 – All rights reserved  9 
 Annex  B 
(normative)  
 
Tare procedures  
B.1 General  
These procedures permit the use of either used or unused dry tare to determine the actual quantity of product 
in the prepackage as follows:  
Actual quantity of product = Weight of the prepackage – Average weight of the packing material  
B.2 Terminology  
B.2.1  
unused dry tare  
weight of unused packing material of one prepackages  
B.2.2  
used dry tare  
packing material that has been used as part of a pre -package and that has been separated from the product 
and cleaned using normal household procedures used by consumers of the product ( for exa mple,  the material 
should not be dried in an oven ) 
B.3 Procedure  
B.3.1  Determine the quantity of either the unused dry tare or used dry tare.  
B.3.2  Randomly select an initial tare sample of 10 or more packing materials (see 2.9) ( for example,  from 
the samp le taken from an inspection lot or from a lot of packing materials at the point -of-pack) and measure 
the weight of each packing material in accordance with Clause 4.  
B.3.3  Determine the average tare weight (ATW) and the sample standard deviation of the ini tial tare sample 
and proceed according to one of the criteria in Table B 1 . 
Table B.1 — Tare  
If Then  
 nominal quantity of 
product  Use the ATW to determine the actual quantity of product in pr epackages 
according to A.2. 7. 
The ATW i s > 10 % of the  nominal quantity and s < 
0.25 X 
T Use a total of 25 packages to compute the ATW and determine the actual 
quantity of product in the pr epackages according to A.2. 7. 
The ATW is > 10 % of the  nominal quantity and s > 
0.25 X 
T An ATW cannot be used. It is necessary to determine and to consider every 
individual tare weight.  
Determine the actual quantity of product in each  prepackage according to 
A.2.7. 
 FDUS 1030 : 2013 
10 © UNBS 2013 – All rights reserved  
 Annex C  
(informative)  
 
Drained quantity of products packed in a liquid medium  
C.1 General  
This procedure can be used to determine the drained quantity of product in a liquid medium and can be 
applied to prepackages with nominal quantities up to 50 kg. When a prepackage contains solid goods in a 
liquid medium there are three possibilities:  
a) the liquid medium is intended to be left over after use ( for example, cucumbers in vinegar water). The 
term “content of the prepackage” (equals “quantity of the product”) applies to the solid products. In this 
case the solid products are those contained in the prepackage excluding the packing material and the 
liquid medium. In this instance the “packing material” (everything that is intended to be left over after 
use) includes the liquid medium. The “content of a prepackage” is just the solid product.  
b) the liquid  medium is not intended to be left over after use ( for example, liquor with raisins, and also 
fruit juice with pulp). The term “content of the prepackage” (equals “quantity of the product”) applies to 
the solid products and the liquid medium. In this insta nce the “packing material” (everything that is 
intended to be left over after use) does not include the liquid medium. The “content of a prepackage” 
is the solid product together with the liquid medium.  This annex is not applicable to these products.  
c) the liquid medium might or might not be left over after use (e.g. sweetened juice with fruits, or fish in 
oil). The definition of packing material does not distinguish between the liquid medium and the goods. 
For instance, a recipe on the label could clarify if  the liquid medium “is meant to be left over after use” 
or not. In this case the quantity of solids and the quantity of liquid medium could be on the label.  
NOTE  The CODEX General standard for the labelling of prepackaged foods  (CODEX STAN 1 -1985) (publish ed by 
the Codex Alimentarius Commission (CAC) of the Food and Agriculture Organization (FAO) of the United Nations) 
requires in 4.3.3 Net contents and drained weight that “a food packed in a liquid medium shall carry a declaration....of the 
drained weight of the food”.  
C.2 Terminology  
C.2.1  
actual contents  
quantity of product in a prepackage after equilibrium of solution process is established and the liquid medium 
is drained according to C.5  
C.2.2  
liquid medium  
includes  the following products, possibly i n mixtures and also when frozen or quick -frozen, provided that the 
liquid is merely an adjunct to the essential elements of that preparation and is thus not a decisive factor for the 
purchase: water, aqueous solutions of salts, brine, aqueous solutions of food acids, vinegar, aqueous 
solutions of sugars, aqueous solutions of other sweetening substances, fruit or vegetable juices in the case of 
fruit or vegetables.  
C.2.3  
nominal quantity  
quantity of product in a prepackage less the liquid medium (see 2.9 an d C.1 ) FDUS 1030 : 2013 
© UNBS 2013 – All rights reserved  11 
 C.3 Procedure for determining the actual quantity of product  
Apply the requirements of Clause 3.  
Unless sampling periods are given in C.6, sampling shall be performed when the products are ready to be 
marketed according to the manufacturer or at any  time later than 30 days after sterilization, pasteurization or 
similar process. Select a sample of prepackages in accordance with 4. 3. The samples shall be  stored for a 
period of 12 h  before testing within the temperature range specified by the packer or between 20 °C and 24 
°C. 
C.4 Apparatus  
For draining the product from a prepackage, use a flat sieve with a square mesh of 2.5 mm (wire thickness 
1.12 mm). The diameter of this sieve should be 20 cm for use with prepackages of 850 mL or less, and 30 cm 
for use with containers over 850 mL. If the nominal quantity is 2.5 kg or more, the quantity may, after weighing 
the whole amount, be divided among several sieves.  
NOTE For standardized sieves see ISO 3310 -1 Test sieves - Technical requirements and testing  - Part 1: 
Test sieves of metal wire cloth .  
For determination of quantity, a weighing instrument shall meet the requirements of Clause 4.  
C.5 Determining the actual quantity of product of a sample  
C.5.1  Determine the sieve‟s weight.  
C.5.2  Open the prepackage and pour the product and liquid medium across the sieve. Distribute the product 
and liquid medium over the surface of the sieve but do not shake the material on the sieve. Tilt the sieve to an 
angle of 17° to 20° from the horizontal to facilitate draining.  Carefully invert by hand all solid product, or parts 
thereof, which have hollows or cavities if they fall on the sieve with the hollows or cavities facing upwards. 
Drain the hollows or cavities in soft products ( for example,  sliced fruit) by tilting the s ieve. Allow a 2 minute 
drain time.  
C.5.3  Reweigh the sieve plus contents and calculate the drained quantity as follows:  
P = Pe2 – Pe1  
where 
P is the  drained quantity of the product ; 
Pe1  is the  weight of the clean sieve ; 
Pe2  is the  weight of the sieve pl us product after draining . 
NOTE  A subsequent weighing of the same sieve should ensure that it is clean and free of product debris. The sieve 
does not have to be dry as long as it is weighed accurately before being used (see also C.6 ). 
C.6 Recommended perio ds of time for checking drained weight  
See examples in Table C.1 . 
 
 FDUS 1030 : 2013 
12 © UNBS 2013 – All rights reserved  
 Table C.1  — Recommended periods of time for checking drained weight  
Product  Period of time for checking  
From  To 
Fruit, vegetable and other vegetable foodstuffs (except 
for strawberries,  raspberries, blackberries, kiwis, 
loganberries)  30 days after  sterilization  Tenability  
Strawberries, raspberries, blackberries, kiwis, 
loganberries  30 days after sterilization  2 years after sterilization  
Products out of salted fish, anchovies, marinade s, 
stewed fish goods, preserved fish, mussels, shrimps, 
etc. Immediately after pouring on  14 days after pouring on  
Marinades of fried fish  48 h after pouring on  14 days after pouring on  
Small sausages and other meat products  5 days after sterilization  Tenability  
Other products  14 days after pouring on  Tenability  
 FDUS 1030 : 2013 
© UNBS 2013 – All rights reserved  13 
 Annex D  
(informative)  
 
Test procedures for determining the actual quantity  of frozen products  
D.1 Frozen fruits and vegetables  
D.1.1  Determine the (gross) weight of the prepackage and immerse it in water maintained at 20 °C (± 1 °C) 
with a continuous water flow (if the prepackage is not water -tight, place it in a plastic bag and remove any 
excess air using a vacuum and then seal it securely). Avoid agitating the prepackage while it is thawing. When 
all of the ice has melted, remove it from the water bath and wipe it dry. Open the prepackage with care and a 
minimum of agitation.  
D.1.2  Determine the weight of a sieve with 2.36 mm square openings and its drain pan. For prepackages 
with a nominal qu antity up to 1.4 kg, transfer the product to a 20 cm diameter sieve, or use a 30 cm diameter 
sieve for prepackages with a nominal quantity greater than 1.4 kg. With the sieve tilted approximately 17° to 
20° from the horizontal to facilitate drainage, distr ibute the product evenly over the sieve in one swee ping 
motion. Drain for 2 min  then transfer the sieve containing the product to the pre -weighed drip pan and 
determine the actual drained quantity of the product . 
D.1.3 Apply the requirements of Clause 3 Me trological requirements for prepackages . 
D.2 Glazed seafood (seafood that is covered with a film of water and then frozen to 
preserve its quality)  
D.2.1 T he actual quantity of the seafood shall be exclusive of the glaze . 
D.2.2 Remove the product from the prepackage and place it under a gentle spray of cold water until the ice 
glaze is removed. Agitate the product with care to avoid damage.  
D.2.3 Transfer the product to a 20 cm diameter sieve with 2.36 mm square openings for prepackages with 
nominal quantit ies of 900 g or less, or use a 30 cm diameter sieve for prepackages greater than 900 g. Incline 
the sieve to approximately 17° to 20° from the horizontal to facilitate drainage without shifting the product. 
Drain for 2 min  and then transfer the product to a pan that has been pre -weighed. Determine the actual 
drained quantity of product . 
D.3 Frozen shrimp and crabmeat  
D.3.1 To thaw the product, use a water bath and a wire mesh basket large enough to hold the contents of a 
prepackage and with openings small e nough to retain the product. Place the product in the basket and 
immerse it in the water bath ( for example,  a 15 L container of water) at 26  °C ± 1 °C so that the top of the 
basket extends above water level. Introduce water at the same temperature at the b ottom of the container at a 
flow rate of 4 L/min – 11 L/min until the product thaws, as determined by loss of rigidity.  
D.3.2 Transfer the product to a 20 cm in diameter sieve with 2.36 mm square openings for prepackages up 
to 450 g, or use a 30 cm diamete r sieve for prepackages greater than 450 g. Without shifting the product on 
the sieve, incline the sieve to approximately 30° from the horizontal to facilitate drainage. Drain for 2 min and 
then transfer the product to a pan that has been pre -weighed. Dete rmine the actual drained quantity of 
product . 
 FDUS 1030 : 2013 
14 © UNBS 2013 – All rights reserved  
 Annex E  
(informative ) 
 
Prohibition of misleading prepackages  
E.1 General  
A prepackage shall not have a false bottom, sidewalls, lid or covering, nor be constructed or filled, wholly or 
partially, in such a way  that may deceive the consumer.  
E.2 Terminology  
E.2.1  
slack fill  
difference between the actual capacity of the packing material and the volume of product it contains. Slack fill 
may be necessary for the following reasons:  
 protection of the product;  
 require ments of machines used for enclosing the contents of the prepackage;  
 unavoidable product settling during shipping and handling; and  
 the need for the prepackage to perform a specific function ( for example,  where packaging plays a role 
in the preparation or consumption of a food), where such a function is inherent to the nature of the 
product and is clearly communicated to consumers.  
E.2.2  
nonfunctional slack fill  
empty space in a prepackage when the prepackage is filled to less than its capacity. If a consum er cannot 
fully view the product in a prepackage, it shall be considered to be filled. A prepackage with excessive 
nonfunctional slack fill is considered to be a misleading one . 
E.3 Aerosol dispensers  
The percentage (grade) of fill by volume of aerosol dis pensers shall be as required in Annex III of European 
Directive 80/232/EEC [3].  and US 1028  FDUS 1030 : 2013 
© UNBS 2013 – All rights reserved  15 
 Table E.1  — Capacities of aerosol dispensers      
Volume of the liquid  phase  
mL Container capacities  
mL 
For p roducts propelled  by 
liquid gas  (a) For products pro pelled by compressed 
gas alone.  
(b) For products propelled by nitrous 
oxide or carbon  dioxide alone or by 
mixtures of the two alone  when the 
product has a Bunsen Coefficient of  1.2 or 
less.  
25 40 47 
50 75 89 
75 110 140 
100 140 175 
125 175 210 
150 210 270 
200 270 335 
250 335 405 
300 405 520 
400 520 650 
500 650 800 
600 800 1000  
750 1000   
 FDUS 1030 : 2013 
16 © UNBS 2013 – All rights reserved  
 Bibliography  
[1] Russing, J.: Special methods for testing of certain types of prepackages such as sparkling beverages, 
aerosols, ice cream  (OIML Bulletin - Number 96, September 1984).  
[2] Dalm, J.A, and Hogervorst, P.: Density measurement — Guidance for inspectors  (BIML, March 1987 ) 
[3] ISO 3534 -1: 1993 Statistics — vocabulary and  symbols — Part 1: Probability and general statistical 
terms . 
[4] Guide to the exp ression of uncertainty in measurement , First edition, 1993, corrected an d reprinted 
1995,  International Organization for Standardization (Geneva, Switzerland).  
[5] Council Directive 80/232/EEC of 15 January 1980 on the approximation of the laws of the Memb er 
States  relating to the ranges of nominal quantities and nominal capacities permitted for certain 
prepackaged  products. (OJ L 51, 25 February 1980, 7 pages).  
[6] OIML R 79 Labeling requirements for prepackaged products . OIML, Paris, 1997 . 
[7]  European D irective 80/232/EEC [3].  [ 
[8] ISO 3310 -1 Test sieves - Technical requirements and testing - Part 1: Test sieves of metal wire cloth .  
 
 FDUS 1030 : 2013 
© UNBS 2013 – All rights reserved  17 
 Certification marking  
Products that conform to Uganda standards may be marked with Uganda National Bureau of Standards  
(UNBS) Certification Mark shown in the figure below.  
The use of the UNBS Certification Mark is governed by the Standards Act, and the Regulations made 
thereunder. This mark can be used only by those licensed under the certification mark scheme operated b y 
the Uganda National Bureau of Standards and in conjunction with the relevant Uganda Standard. The 
presence of this mark on a product or in relation to a product is an assurance that the goods comply with the 
requirements of that standard under a system o f supervision, control and testing in accordance with the 
certification mark scheme of the Uganda National Bureau of Standards. UNBS marked products are 
continually checked by UNBS for conformity to that standard.  
Further particulars of the terms and cond itions of licensing may be obtained from the Director, Uganda 
National Bureau of Standards.  
 
 FDUS 1030: 2013   
 
ICS nn.nnn.nn  
Price based on nn pages  
© UNBS 2013 – All rights reserved