CNMV 76                                                          第 1 頁，共 16 頁 
  
  Draft of Technical Specification for the  
Verification and Inspection of Weighing 
Instruments  No. CNMV  76 
Edition  7th Edition  
1. These Guidelines are formulated  in accordance with Paragraph 2 of Article 14 and Paragraph 2 of Article  16 of the We ights and 
Measurements Act.  
2. The promulgation dates, document numbers and enforcement dates of these Guidelines and made revisions are as follows:  
Edition  Promulgation 
Date  Document No. (Jing 
Biaos 4)  Enforcement 
Date  Content of Revision  
１ March 13, 2003  No. 09240002410  April 1, 2003   
2  Aug 20, 2003  No. 09240007320   Sep 1, 2003  1. Unification of weighing instrument terminology, 
consolidation of contents of related section, and removal of 
regulations for balances.  
2. Addition of terminol ogy definition.  
3. Simplification of regulations for proof of verification.  
3  Mar 3 0, 2005  No. 09440001110  July 1, 2005  1. Addition of regulations  for verification of portable 
weighbridges.  
2. Revision of accuracy classes and tolerances for 
non-automa tic weighing instruments other than 
weighbridges.  
3. Addition of regulations for conversion of “Taiwan catty ”, 
“Taiwan tael ” and Taiwan qian ”.  
4. Removal of additional performance tests for electronic 
non-automatic weighing instruments with the price 
comp uting function and the number of verification scale 
intervals exceeding 10,000.  
5. Removal of regulations for verification tolerances for balance 
weights.  
4  Feb.02, 2010  No. 09940000600  Mar16, 
2010  1. Redefining the catchweigher as automatic gravimetr ic filling 
weighing instrument.  
2. Adding the requirements  of verification of auxiliary 
indicating devices, multi -interval weighing instruments, and 
multiple range weighing instruments.  
3. Adding the procedures for gradual increase and decrease 
procedures in verification of non -automatic weighing 
instruments.  
4. Adding the requirements for reservation of space and size to 
place the verification mark.  
5 Oct 31, 2012  No. 10140006423  Jan 1, 2014  1. Revising the method of eccentricity  verification . 
2. The cla use of the validity  of automatic gravimetric filling 
weighing  instrument  and discontinuous totalizing automatic 
weighing instrument . 
3. The clause of seal on electric types of weighing instrument s 
with price -computing function . 
6 Jun 23,2014  No. 103400039 30 Jun 23,2014  1. Removing the clause of seal on electric types of weighing 
instrument s with price -computing function . 
2. Adding the requirements  on issuing the verif ication certificate 
of discontinuous totalizing automatic weighing instrument  
and automati c gravimetric filling weighing instruments . 
7 00 00,2022  No. 1 114000 0000 00 00,2022  Adding the  requirements  for sampling verification  
3. These Guidelines have been established in line with the following international guidelines:  
 
OIML R76 -1 Nonautomatic w eighing instruments  Part 1：Metrological and technical requirements -Tests（1992） 
OIML R107 -1 Discontinuous totalizing automatic weighing instruments （totalizing hopper weighers ）Part 1：
Metrological and technical requirements -Tests（1997） 
CNMV 76                                                          第 2 頁，共 16 頁 
  
 Promulgated on: 00 00, 2022  Bureau of Standards, Metrology and 
Inspection, Ministry of Economic Affairs  Enforced on : 00 00, 2022 CNMV 76                                                          第 3 頁，共 16 頁 
  
 1. Terminology  
1.1 Weighing instrument  
Measuring instrument that serves to determine the mass of a body by using the 
action of gravity on this bod y. 
The instrument  may also be used to determine other quantities, magnitudes, 
parameters or characteristics related to mass. According to its method of 
operation, a weighing instrument is classified as an automatic or non -automatic 
instrument.  
1.2 Non -automatic weighing instrument  
Instrument that requires the intervention of an operator during the weighing 
process, for example to deposit on or remove the measured load from the 
receptor the load to obtain the result. The result can be observed directly eithe r 
by displaying or printing. The term of indication will represent the result of 
measurement in both indicating methods. . 
According  to the method of measurement, weighing instruments can be 
classified as static and dynamic types.  
1.2.1 Non -self-indicating  instrument  
Instrument  the position of equilibrium is obtained entirely by the operator.  
1.2.2 Price -computing instrument  
Instrument  calculates the price to pay on the basis of the indicated mass and the 
unit price . 
1.2.3 Fixed weighbridge  
A non-automatic  weighing instrument  that is fixed on the ground permanently 
measure s the weight of an object remaining still on its carrier.  
1.2.4 Portable weighbridge  
A portable weighbridge is a portable weighing pad that can be place on the 
ground to accommodate a stil l motor vehicle to measure the load on each wheel 
(or the axle) of the vehicle and summarize  its total weight.  
1.3 A utomatic weighing instrument  
Automatic weighing i nstrument is an instrument that weighs without the 
intervention of  an operator and/or foll ows a predetermined program of  
automatic process characteristic of the instrument.    
1.3.1 Discontinuous totalizing automatic weighing instrument  
An automatic weighing instrument that weighs a bulk product by dividing it 
into discrete loads, determining th e mass of each discrete load in sequence, 
summing the weighing results and delivering the discrete loads to bulk.  (e.g., 
the so -called hopper weighers ).  
1.3.2  Automatic gravimetric filling weighing  instrument  
Instruments which fill containers with predete rmined and virtually constant 
mass of product from bulk by automatic weighing, and which comprises CNMV 76                                                          第 4 頁，共 16 頁 
  
 essentially automatic feeding device(s) associated with weighing unit(s) and the 
appropriate control and discharge devices.    
1.4 Electronic instrument  
An el ectronic instrument is a weighing instrument equipped with electronic 
devices.  
1.5 Weighing capacity  
1.5.1 Maximum capacity (Max)  
Maximum weighing capacity, not taking into account the additive tare capacity.  
1.5.2 Minimum capacity (Min)  
Value of the load below that the weighing results  may be subject to an exces -
sive relative error.  
1.5.3 Weighing range  
Range between the minimum and maximum capacities.  
1.6 Scale divisions  
1.6.1 A ctual scale interval  (d) 
Value, expressed in units of mass of the difference  between the values 
corresponding to two consecutive scale arks or the difference between two 
consecutive indicated values.   
1.6.2 Verification scale interval (e)  
Value, expressed  in units of mass, used for the classification and verification of 
an instru ment.  
1.6.3 Number of verification scale intervals  
Quotient  of the maximum capacity and the verification scale interval:   
n = Max/e  
1.6.4 Multi -interval instrument  
Instrument  having one weighing range that  is divided into partial weighing 
ranges each with  different scale intervals, with the weighing range determined 
automatically according to the load applied, both on increasing and decreasing 
loads.   
1.6.5 Multiple range instrument  
Instrument having two or more weighing ranges with different maximum 
capac ities and different scale intervals for the same load receptor, each range 
extending from zero to its maximum capacity.   
1.7 Tare device  
Device for setting the indication to zero when a load is on the load receptor:  
- Without altering the weighing range fo r net loads (additive tare device) ; or 
- Reducing the weighing range for net loads (subtractive tare device).   
1.8 Auxiliary indicating devices  
1.8.1 Rider  
Detachable  poise  of small mass may be placed and moved either on a graduated 
bar integral with the beam or on the beam itself.   CNMV 76                                                          第 5 頁，共 16 頁 
  
 1.8.2 Device for interpolation of reading (vernier or nonius)  
Device  connected to the indicating element and sub -dividing the scale of an 
instrument, without special adjustment.  
1.8.3 Complementary indicating device  
Adjustable  devic e by means of which it is possible to estimate, in units of mass, 
the value corresponding to the distance between a scale mark and the indicating 
component.  
1.8.4 Indicating device with a differentiated scale division  
Adjustable  device by means of which it  is possible to estimate, in units of mass, 
the value corresponding to the distance between a scale mark and the indicating 
component.  
1.9 Build -up system  
The testing processes  that using a certain device such as a hydraulic press to 
simulate a specific lo ad and read the load via a transducer.  
2. Scope: This specification applies to non-automatic weighing instruments, automatic 
gravimetric filling weighing instruments and discontinuous totalizing automatic 
weighing instruments (together hereafter referred t o as weighing instruments)  
subject to verification and inspection, but do not apply to dynamic non -automatic 
weighing instruments.  
3. Metrology require ments and construction  
3.1 Accuracy class  
The verification scale interval, number of verification scale intervals and 
minimum capacity of non -automatic weighing instrument s except for fixed 
weighbridge  shall comply with Table 1.   
Table 1  
Accuracy 
Class  Verification Scale 
Interval  
e Number of Verification 
Scale Intervals  
n＝Max/e  Minimum 
Capacity  
Min 
(lower li mit) Min Max 
Special class  
 0.001 g 
  e  50000  － 100 e  
High class  
 0.001g
 e
0.05g  
0.1 g 
  e 100 
5000  100000  
100000  20 e 
50 e 
Medium class  
 0.1 g
  e 
 2 g 
5 g 
  e 100 
500 10000 
10000 20 e 
20 e 
Ordinary class  
 5 g 
  e 100 1000  10 e 
Symbol s of accuracy  classes  are ovals of any shape, or two horizontal lines 
joined by two half -circles are permitted. A circle shall not be used.    
3.2 The following items must be clearly indicated on each weighing instrument:  CNMV 76                                                          第 6 頁，共 16 頁 
  
 （1）Serial number.  
（2）Verification scale interval (e)  
（3）Maximum weighing capacity (Max).  
（4）Minimum weighing capacity (Min).  
（5）Name of manufacturer ; for imported  instruments, name of importer must 
also be marked ; instruments applied  for re -verification w ithout the 
aforesaid labeling, name of repairer must be indicated.  
（6）When power supply required, the voltage, current and frequency must be 
indicated. However, the indicat ion of frequen cy is not needed if direct 
current is being  used.  
（7）Accuracy class ( fixed weighbridges, automatic gravimetric filling 
weighing instruments and discontinuous totalizing automatic weighing 
instruments excluded).  
（8）Actual scale interval (d=) ( when  d<e) 
（9）Original country  
Indication of the items  prescribed in the preceding p aragraph must be direct, 
tightly secured and wear -resistant.  
The following are examples of indication of the maximum capacity, 
minimum capacity and verification scale interval for multi -interval 
instruments:  
Max 3/6/15 kg  
Min 20 g  
e = 1/2/5 g  
The following  are examples of indication of the maximum capacity, 
minimum capacity and verification scale interval for multiple range 
instruments:  
W1: Max 3 kg  Min 20g  e= 1 g  
W2: Max 6 kg  Min 40g  e= 2 g  
W3: Max 15 kg  Min 100g  e= 5 g  
3.3 The numbers of verificatio n scale intervals of weighing instruments must 
comply with the following  requirements : 
3.3.1 For mechanical or electronic non -automatic weighing instrument s with 
ratio platforms  or sliding poises  lever, the number of verification scale 
intervals shall be n ot less than 1000 ; for simple steelyards with scale 
pointer or sliding poises , the number of verification scale intervals shall be 
not less than 200.  
3.3.2 For discontinuous totalizing automatic weighing instrument s, the number 
of verification scale inter vals shall be not less than 200. 
3.3.3 For fixed weighbridge s, the number of verification scale intervals shall be 
not less than 1000 . CNMV 76                                                          第 7 頁，共 16 頁 
  
 3.3.4 For portable weigh bridges , the number of verification scale intervals shall 
be not less than 100.  
3.3.5 For automa tic gravimetric filling weighing  instrument , the number of 
verification scale intervals shall be not less than 100. 
3.4 If a measuring instrument equip s with a level indicator , the level indicator  shall 
be installed at a place convenient  for observation.  
3.5 The graduat ion plate or graduat ion pan of a mechanical weighing  instrument  
shall  be installed firmly, free from danger of loosening or deformation.   
3.6 If an instrument is provided with a ratio platform for extending the indicating 
range of the numbere d scale, the ratio between the value of the weights placed 
on the platform to balance a load and the load itself shall  be 1/5, 1/10, 1/50, 
1/100 or 1/200 and shall be indicated legibly and permanently on the beam in a 
position close to the ratio platform a nd the weights.  .  
3.7 For mechanical weighing instrument s using ratio platform with weights or 
sliding poises , the ratio platform  and the graduated bar  shall be marked with the 
same serial  number .  
3.8 If made of cast iron, weights and increment of ration  platform shall have holes 
for the purpose of embedding metal to make them easy to engrave marks.  
3.9 For verification against a fixed weighbridge, if the  verification cannot be 
performed according to the claimed maximum capacity, the actual maximum 
tested capacity shall be regarded as the maximum capacity of the fixed 
weighbridge under test . 
3.10 The sling for the  weights shall  not be made of metal.   
3.11 Verification scale interval  
The verification scale interval of all types of weighing instruments shall  
comply with the require ments in Table 2.  
Table 2  
Instrument Type  Verification Scale Interval  
Graduated, without 
auxiliary indicating device  
 e = d  
Graduated, with auxiliary 
indicating device  e is chosen by the manufacturer 
according to the requirements  in 3.1 
and 3. 12.2 
Non-graduated  e is chosen by the manufacturer 
according to the requirements in 3. 1.  
3.12 Additional requirements for auxiliary indicating devices  
3.12.1 Type and application  
Only instruments  of Class
  and Class
  may be fitted with one of the 
following auxiliary indicating devices, namely rider, device for CNMV 76                                                          第 8 頁，共 16 頁 
  
 interpolation of reading, complementary display ing device, or indicating 
device with a differentiated scale division.  
These auxiliary  devices  are permitted only to the right of the decimal sign . 
A multi -interval instrument shall not be fitted with an auxiliary indicating 
device.  
3.12.2 Verification scale interval  
The verification scale interval, e, is determined by the expression:  
d < e ≤ 10 d（See T able 3a and Table 3b ） 
e = 10k kg，k is a positive or negative integer, or zero.  
This requirement  does not apply to Class
  instruments with d<1 mg. 
See examples for instruments with e=1mg as shown in Table 3b:  
 
 
Table 3a  
d = 0.1 g  0.2 g  0.5 g 
e = 1 g 1 g 1 g 
e = 10 d 5 d 2 d 
Table 3b  
d = 0.01 mg  0.02 mg  0.05 mg  < 0.01 mg  
e = 1 mg  1 mg  1 mg  1 mg  
e = 100 d  50 d 20 d > 100 d  
3.12.3 Minimum capacity  
The minimum capacity of the instrument is determined in conformity with 
the requirements  in Table 1 in Section 3.1 . However, in the last column of 
this Table, the verification scale interval, e, is replaced by the actual scale 
interval, d.. 
3.12.4 Minimum number of verification scale intervals  
For an instrument of Class
  with d<0.1mg , n may be less than 50,000.  
3.13 Additional  requirements  for multi -interval weighing instruments  
3.13.1 Partial weighing range  
Each partial range (index i = 1, 2, …) is defined by :  
its verification scale interval e i, ei+1>ei;  
its maximum weighin g capacity Max i; and 
its m inimum weighing capacity Min i= Max i-1 (if i = 1, the minimum 
capacity Min 1 = Min)。 
The number of verification scale intervals, ni, for each partial range is 
equal to   
ni=Max i/ei 
3.13.2 Accuracy class  
ei and ni in each partial weighing range, and Min 1 shall comply with the 
requirements given  in Table 1 in Section 3.1  according to the accuracy CNMV 76                                                          第 9 頁，共 16 頁 
  
 class of the instrument .  
3.13.3 Maximum capacity of the partial weighing range  
With the exception of the last partial weighing range, the requirements  in 
Table 4 shall be complied with, according to the accuracy class of the 
instrument :  
Table  4 
Accuracy 
Class  
  
  
  
  
Max i/ei+1 
 50000  
 5000  
 500 
 50 
3.14 Additional Requirements for mul tiple range weighing instruments  
3.14.1 On multiple range instruments the verification scale intervals are e1, 
e2, …, er with e1 < e2 < … < er. Similar subscripts are also used with the 
terms Min, ( n) and Max.  
3.14.2 On multiple range instruments, each ran ge is treated as if it were an 
instrument with one range .  
4. Verification, inspection and tolerances  
4.1 Verification equipment: Traceability is required.  
（1）Errors  of standard weights  used for verification of the weighing 
instrument s shall be not more than 1/3 of the maximum permissible 
errors of the corresponding weighing capacity of the weighing 
instrument s. 
（2）Not less than ten 1t standard weights  shall be prepared for verification of 
a fixed weighbridge with a maximum capacity of 10t or above .   
（3）An appropriately assessed Build -up system may be used for verification 
of the portable weighbridge.   
4.2 Verification  process of weighing instruments  (suspens ion type  excluded ) shall 
be conducted on stable horizontal plane . 
4.3 When  the verification of a weighing instrument and its auxiliary devices cannot 
be implemented separate ly, the verification of the instrument and its auxiliary 
devices shall be implement ed as an integrated instrument . .  
4.4 Whe n a weighing instrument has two or more mass indicating devices , the 
differences between the indicated values shall be not more than 1/3 of the 
verification maximum permissible errors .  
4.5 The accumulated errors o f the indicator of any weighing instrument shall be not 
exceed the sum of the verification maximum permissible errors.  
4.6 If a weighing instrument equips  with a stopper of indication, the difference 
between the indicated values  before and after the stopp er shall be  not exceed the 
verification maximum permissible errors . 
4.7 For electronic weighing instruments (fixed weighbridge and discontinuous 
totalizing automatic weighing instrument s excluded ) if the loaded capacity is CNMV 76                                                          第 10 頁，共 16 頁 
  
 more than the maximum capacity pl us nine times the verification scale interval s, 
the display shall not have digital indicat ion.   
4.8 Weighing instrument s shall adopt the legal units of measure ment  as the main 
metrological units and may adopt other units as auxiliary units  (if Tai -Chin, 
Tai-Liang and Tai -Chien are used, the conversions are as follows: 1 
Tai-Chin=0.6 kg, 1 Tai -Liang=37.5g, 1 Tai -Chin=16 Tai -Liang, and 1 
Tai-Liang=10 Tai -Chien.)  
4.9 The interval  of price to pay of price -computing weighing instrument shall be 
NTD1. The price to pay shall be calculated by multiplication of weighting result 
and unit price (the price to pay shall be rounded off to dollar.)  
4.10 The function  of automatic  zero setting of electronic fixed weighbridges shall 
be disabled during verification.  
4.11 Weights  shall  be used for verification of weighing instruments except portable 
weighbridges.  
4.11.1 In verification  of non -automatic weighing instruments with a load 
capacity exceeding 10t, substitut ive object s may be used to replace weights 
and loaded on one by one for verification .  
4.11.2 In verification  of discontinuous totalizing automatic weighing instruments 
with a load capacity exceeding the maximum weighing capacity by more 
than 1/2 or 1t, substitutive objects of may be used to replace weights and 
loaded on one by one for verification . 
4.12 When  a fixed weighbridge over 10t in capacity is to be verified, the applicant 
or user is required to prepare the needed weights or substitutive objects.  
4.13 Weighing  verification  
This verification is to test the  weighing performance  of weighing instruments 
under different load capacities; each testing  error shall not exceed the 
verification maximum permissible errors.  
4.13.1 Weighing  verification against fixed weighbridges and discontinuous 
totalizing automatic weighing instruments shall be conducted on five 
different load capacities respectively, including the maximum capacity and 
load not more than 10% of the maximum capacity. The forementioned 
maximum capacity shall be the maximum capacity indicated on the 
weighing instrument.  
4.13.2 Weighing  verification against non -automatic weighing instruments, 
portable and fixed weighbridges exclude d, shall be conducted on at least 
three different load capacities respectively, including the maximum 
capacity. Addition and removal of each load capacity shall be performed 
gradually in the ascending and descending order respective ly.  
4.13.3 Weighing  verification of portable weighbridges shall be conducted on five 
different load capacities respectively and addition and removal  of each load CNMV 76                                                          第 11 頁，共 16 頁 
  
 capacity shall be performed gradually in the ascending and descending 
order respective ly. The principles for selecting load capacity are as follows:  
（1）The load capacities must be separated  between the minimum and 
maximum weighing capacities  near equally.  
（2）The change point of maximum permissible error shall be included. 
Instruments with multi -interval weighing instruments equipped with 
partial weighing ranges, the load capacities all change points of maximum 
permissible error shall be inclu ded. 
（3）The load capacity at the point of scale interval shall be excluded . A load 
capacity 5e smaller than this point is recommended .  
（4）of maximum permissible error shall be included., a load capacity 5e 
smaller than the maximum weighing capacity is re commended.  
4.13.4 Weighing  verification against automatic gravimetric filling weighing 
instruments shall be conducted on at least three different load capacities 
respective ly, including the maximum capacity.  
4.14 Eccentricity  verification  
This verificatio n is to test the weighing performance  of an instrument  when 
loading object s on different  position s of the load receptor . Each testing  error 
shall not exceed the verification maximum permissible errors.  
If the surface area of the load receptor is  too small to accommodate the load 
on a specific position  for verification, the verification loads or position s can 
be reduced.  
This verification is not required for suspended non -automatic weighing 
instruments.  
4.14.1 To implement the eccentricity  verification o n non-automatic weighing 
instrument s (fixed and portable weighbridge  excluded), place capacity  not 
less than 1/4 of the maximum capacity on the load  receptor  at the positions 
as shown in Figure 1   
Figure 1  
 
 
 
 
4.14.2 To implement the eccentricity  verificati on on fixed weighbridge, use 
either  one of following  method:  Load capacity  not less than 1/3 of the 
maximum capacity shall be placed on the load receptor  at the positions as 
shown in Figure 2 or Figure 3 respectively to conduct the eccentricity  
verificatio n of a fixed weighbridge with the load supported on two or 
more sections .       CNMV 76                                                          第 12 頁，共 16 頁 
  
 （1）place capacity  not less than 1/4 of the maximum capacity  on each 
load receptor  respectively at the positions as shown in Figure 2. 
Fig. 2  
 
 
 
 
 
 
 
 
（2）place capacity  not less than 1/3 of the maximum capacity  on each 
load receptor  respectively at the posi tions as shown in Figure  3. 
Fig. 3 
 
 
 
 
 
4.14.3 Load of  1/3 of the maximum capacity shall be placed on the load  receptor  
at the positions as shown  in Figure 4 respectively to conduct the 
eccentricity  verification of a portable weighbridge.  
Fig. 4  
 
 
 
 
 
 
4.15 Repeatability verification  
This verification is to test the performance of the weighing instrument in 
weighing identical  loaded capacit ies. The difference between any two 
weighing results shall  not exceed the verification maximum permissible 
error .  
4.15.1 For the repeatability verification of portable weighbridge , the load that is 
nearest to the second change point of maximum permissible errors  shall 
be designated  as the load capacity. If a weighing instrument does not have 
a second change point of maximum permissible errors , 2/3 of the 
maximum capacity shall be used as the load capacity.      
   
  CNMV 76                                                          第 13 頁，共 16 頁 
  
 4.15.2 For the repeatability verification of automatic gravimetric filling weighing 
instruments , the defined filling weight  shall be designated  as the load 
capacity. If the said filling weight is not defined, 2/3 of the maximum 
capacity shall be adopted as the load capacity.  
4.16 The verification maximum permissible errors  of weighing instruments can be  
plus or minus and are  as below : 
4.16.1 The maximum permissible erro rs of non -automatic weighing instruments 
(except for fixed weighbridge s) shall comply with  Table 5.  
Table 5  
Verific
ation 
Tolera
nce Load m Expressed in Verification Scale Interval e  
 
  
  
  
±0.5 e 0 
 m 
 50000 0 
 m 
 5000 0 
 m 
 500 0 
 m 
 50 
±1.0 e 50000 ＜ m 
 
200000 5000 ＜ m 
 20000 500 ＜ m 
 2000  50 ＜ m 
 200 
±1.5 e 200000 ＜ m 20000 ＜ m 
 
100000  2000  ＜ m 
 
10000  200 ＜ m 
 1000  
 
4.16.2 The maximum permissible error  of fixed weighbridge s is 1/1000 of the 
load capacity. However, if 1/1000 of the load capacity is less than 
verification scale interval, the maximum permissible error  shall be the 
verificatio n scale interval .  
4.16.3 The maximum permissible error  of discontinuous totalizing automatic 
weighing instrument s is 1/200 of the load capacity. However, if 1/200 of 
the load capacity is less than verification scale interval, the maximum 
permissible error  shall be the verification scale interval . 
4.16.4 The maximum permissible errors  of automatic gravimetric filling 
weighing instruments  are as shown in Table 6.  
Table 6  
Verification 
Tolerance  Load m Expressed in Verification 
Scale Interval e  
±0.5 e  0 
 m 
 500 
±1.0 e 500 ＜ m 
 2000  
±1.5 e 2000  ＜ m 
 
4.16.5 The maximum permissible errors  of increment  weights are as shown in 
Table 7  
Table 7  
Actual Weight  Tolerance  
Lighter than 20g 1/2000  of the actual  weight  CNMV 76                                                          第 14 頁，共 16 頁 
  
 Lighter than 100g  1/3000  of the actual we ight 
Heavier than 100g  1/5000  of the actual weight  
 
4.16.6 The maximum permissible error of weights is 1/1000 of the actual weight 
of the weight.  
4.17 The maximum permissible error  of inspection is twice  as that of verification .  
4.18 The validity of ver ification of fixed, portable weighbridges, automatic 
gravimetric filling weighing  instrument  and discontinuous totalizing automatic 
weighing instrument  validates since the day that the verification mark is 
attached until the first day of the next thirteen months .  
4.19 Sampling Verification  
4.19.1 If weighing  instruments comply with the following requirements, the 
applicant may apply for sampling verification:  
(1) The weighing instruments of the same brand and type manufactured 
by the applicant have b een continuously verified for equal to or more 
than 10 batches within 3 years, the cumulative number of such 
instruments being verified is equal to or more than 1,000, and the 
defective rate is equal to or less than 0.5 %. For electronic weighing 
instrumen ts, they shall be type -approved . 
(2) The applicant shall take relevant quality management measures, and 
produce products under the same conditions of manufacturing facility, 
process, material specifications and suppliers. For electronic 
weighi ng instruments, they shall be consistent  with the approved type, 
and quality management statement  shall be provided . 
4.19.2 The weighing instruments sampled from the same batch shall be verified 
in accordance with all the verification items; the other un -sampled ones 
shall be verified in accordance with items in the section 3.  
4.19.3 The sampling plan is shown in Table 8, and the verification results and 
processing methods of the first sampling are shown in Table 9. If the 
result of the first sampling can ’t be confirmed as pass or not, the second 
sampling will be carried out. If all of the weighing instruments in the 
second sampling passes verification requirements, the batch passes the 
sampling verification; if it fails, all weighing instruments in the batch will 
be verified individually(100 % verif ication). For those weighing 
instruments failed the verification will be handled by relevant provisions 
accordingly . 
 
Table 8 Sampling plan table (selective double sampling plan)  
Lot Size  1st Sampling  2nd Sampling  
Sample 
Size Max. qty 
allowed to fail, 
C-Conforming Qty fail triggers 
100% verification, 
R-Reject (R)  Sample 
Size Cumulative  Max. 
qty allowed to 
fail, CNMV 76                                                          第 15 頁，共 16 頁 
  
 (C1) C-Conforming 
(C2) 
51~99  35 0 1 -- -- 
100~300  50 0 2 30 1 
301~600  80 1 3 40 2 
601~1,000  120 2 4 60 3 
 
Table 9 Results of the first sampl ing verification and processing methods  
Test result  processing methods  
 X1 C1 The batch passe s random verification . 
X1 R The batch does not pass the sampling 
verification, and 100% verification  shall be 
performed . 
C1 < X1 < R 2nd sampling  shall be performed.  
(Note: X 1 is the number of non -conforming in the first sampling.)  
 
4.19.4 If there are 2 batches of 100% verification occured in the 10 consecutive 
sampling verification batches, then the applicant can only  apply for 
sampling test again  once the subsequent batches of the same brand and 
type of weighing instruments manufactured by the applicant compl ies 
with the requirement of Section 4.19.1 . 
4.19.5 The competent authority  of weights and measures may, when necessary, 
dispatch personnel to audit whether the applicant for sampling verification 
has executed the relevant quality management measures in accordance 
with the provisions in Section 4.19.1. In case of non -conformance found, 
the applicant will not  be allowed to apply for sampling verification until 
the non -conformance is corrected. The applicant can only  apply for 
sampling test again  once the subsequent batches complies with the 
requirement of Section 4.19.1 . 
5. Verification compliance tag  
5.1 There shall be a reserved spot on each weighing instrument to accommodate the 
verif ication mark. The sizes are as follows:  
（1）With the exception of weighbridges, The reserved spot for the verification 
mark shall be 30mm x 20mm, weighbridges exclude d. 
（2）The reserved spot for weighbridges for   the verification mark shall be 
80mm x 40mm  
（3）The reserved  spot for verification mark  engraved shall be 10mm x 10mm.  
5.2 The positions  for the verification mark for weighing instruments are as follows:  
5.2.1 Non -automatic  weighing instruments:  
5.2.1.1 Mechanical types:  CNMV 76                                                          第 16 頁，共 16 頁 
  
 （1）For those  with a dial indicator, the verification mark shall be pl aced on 
the dial indicator and covered over the dial gauge fastening screw.  
（2）For those with a ratio platform or a bar with accessible  sliding poises, the 
“
” symbol shall be engraved on the side of the end of the bar 
where the weighing capacity  is marke d, the side of the sliding poises, 
the top of the copper increment  weights, the side of the iron increment 
weights, and above the serial number on the ration platform ; a 
verification compliance tag  shall be attached on the weighing 
instrument body.  
（3）For a steelyard with a sliding poises, the “
” symbol shall be 
engraved on the side of the pivot and the top side of the weight.  
（4）For fixed weighbridges, the “
” symbol shall be engraved on the 
side of the end of the bar where the weighing capacity  is mark ed, the 
end of the secondary bar, the side of the sliding poise and the top side of 
the hanging weight; a verification compliance tag shall be clearly 
attached to a visible spot o f the weighing instrument body.  
5.2.1.2 Electronic types: the verification co mpliance tag shall be clearly 
attached on a visible spot of the instrument body.  
5.2.1.3 A verification  certificate shall be issued for fixed or portable 
weighbridges that has passed verification.  
5.2.2 Discontinuous  totalizing automatic weighing instrumen ts: 
5.2.2.1 Mechanical types : The “
” symbol shall be engraved on the side of the 
end of the bar where the weighing capacity  is marked, the end of the 
secondary bar, the side of the sliding poises, and the top side of the 
hanging weight. A verification com pliance tag shall be attached on the 
instrument body.  
5.2.2.2 Electronic types : A verification compliance tag shall be attached on to 
the side of the marking showing the total weighing capacity or the 
serial number.  
5.2.2.3 A verification  certificate shal l be issued for d iscontinuous totalizing 
automatic weighing instruments  that ha s passed verification.  
5.2.3 Weights : The “
” symbol shall be engraved on the top side of the 
weights or the copper locking screw of the iron weight.  
5.2.4 Automatic  gravimetric  filling weighing instruments: Th ose passed the 
verification process shall be affix with the verification compliance tag s on a 
position easy scrutiny  and verification certificate s shall be issued.