This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles

for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Designation: E617 − 18

Standard Specification for

Laboratory Weights and Precision Mass Standards1
This standard is issued under the fixed designation E617; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.

1. Scope 1.7 This international standard was developed in accor-

1.1 This specification covers weights and mass standards dance with internationally recognized principles on standard-
used in laboratories, specifically classes 000, 00, 0, 1, 2, 3, 4, ization established in the Decision on Principles for the
5, 6, and 7. This specification replaces National Bureau of Development of International Standards, Guides and Recom-
Standards Circular 547, Section 1, which is out of print. mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
1.2 This specification and calibration method is intended for
use by weight manufacturers, national metrology institutes, 2. Referenced Documents
weight calibration laboratories, accreditation bodies, users of
weights, and regulatory bodies. 2.1 ISO Standards:2
ISO/IEC 17025 General Requirements for the Competence
1.3 This specification contains the principal physical char- of Testing and Calibration Laboratories (2005)
acteristics and metrological requirements for weights that are
2.2 NIST Standards:3
used.
NIST Handbook 143 State Weights and Measures Laborato-
iTeh Standards
1.3.1 For the verification of weighing instruments;
ries Program Handbook (2007)
1.3.2 For the calibration of weights of a lower class of
NIST SP 811 Guide for the Use of the International System
accuracy; and
(https://standards.iteh.ai)
of Unit (SI) 2008 Edition
1.3.3 With weighing instruments.
NIST SP 1038 The International System of Units (SI) –
1.4 Maximum Permissible Errors (formerly tolerances) and Conversion Factors for General Use (May 2006)
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design restrictions for each class are described in order that
both individual weights or sets of weights can be chosen for
NISTIR 5672 Advanced Mass Calibration and Measurement
Assurance Program for State Calibration Laboratories
appropriate applications. (2014)
1.5 Weight manufacturers must be able to provideASTM NISTIR
E617-18
evidence 6969 Selected Laboratory and Measurement Prac-
that all new weights comply with specifications in this standard tices to Support Basic Mass Calibrations (2017)
https://standards.iteh.ai/catalog/standards/sist/a1a870f8-33e8-487a-8f75-fe2eaa0d3266/astm-e617-18
(for example, material, density, magnetism, surface finish, NIST Technical Note 1297 (1994) Guidelines for Evaluating
mass values, uncertainties). Statements of compliance by and Expressing the Uncertainty of NIST Measurement
calibration laboratories during subsequent calibrations must Results
meet the requirements of ISO/IEC 17025, 5.10.4.2 and indicate 2.3 OIML Standards:4
on the calibration report which sections have or have not been OIML D 28 Conventional Value of the Result of Weighing in
assessed. Subsequent calibrations must meet all the require- Air (2004)
ments (including environmental parameters as shown in OIML R111–1e04 Weights of classes E1, E2, F1, F2, M1,
Table 11, of Sections 7, 8, and 9; and the requirements of M1–2, M2, M2–3 and M3 Part 1: Metrological and
ISO/IEC 17025:2005, 5.10.4.2 to make any claim of compli- Technical Requirements (2004)
ance to Specification E617, Maximum Permissible Errors, 2.4 BIPM Standards:5
weight classes, or metrological traceability. VIM: JCGM 200:2012 International Vocabulary of Metrolo-
1.6 The values stated in SI units are to be regarded as gy–Basic and General Concepts and Associated Terms
standard.
2
Available from International Organization for Standardization (ISO), 1, ch. de
la Voie-Creuse, CP 56, CH-1211 Geneva 20, Switzerland, http://www.iso.org.
1 3
This specification is under the jurisdiction of ASTM Committee E41 on Available from National Institute of Standards and Technology (NIST), 100
Laboratory Apparatusand is the direct responsibility of Subcommittee E41.06 on Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http://www.nist.gov.
4
Laboratory Instruments and Equipment. Available from Organisation Internationale de Metrologie Legale, 11 Rue
Current edition approved Oct. 1, 2018. Published November 2018. Originally Turgot, 75009 Paris, France, http://www.oiml.org.
5
approved in 1978. Last previous edition approved in 2013 as E617 – 13. DOI: Available from Bureau International des Poids et Mesures (BIPM), Pavilion de
10.1520/E0617-18. Breteuil, F-92312, Sèvres Cedex, France, http://www.bipm.org.

Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States

1
 E617 − 18
GUM: JCGM 100:2008 Evaluation of Measurement assigned nominal value plus the assigned correction. Positive
Data–Guide to the Expression of Uncertainty in Measure- corrections indicate that the weight embodies more mass than
ment is indicated by the assigned nominal value. Negative correc-
2.5 EURAMET Standards:6 tions indicate that the weight embodies less mass than is
EURAMET/cg-18/V. 4.0 Guidelines on the Calibration of indicated by the assigned nominal value. The correction is
Non-Automatic Weighing Instruments (2015) equivalent to the “error.”
3.1.7 international prototype kilogram—the platinum-
3. Terminology iridium cylinder maintained at the International Bureau of
3.1 Definitions of Terms Specific to This Standard: Weights and Measures (BIPM), at Sevres, France with an
3.1.1 accuracy class of weights—a class of weights that internationally accepted defined mass of 1 kg.
meets certain metrological requirements intended to keep the 3.1.8 magnetism—effect that generates an attractive or re-
errors within specified limits. pulsive force.
3.1.2 balance—instrument indicating apparent mass that is 3.1.8.1 (volume) magnetic susceptibility (χ)—measure of the
sensitive to the following forces: ability of a medium to modify a magnetic field. It is related to
F g 5 m·g
Force due to gravity the magnetic permeability (µ) by the relation: µ/µ0 = 1 + χ. The
quantity µ/µ0 is sometimes referred to as the relative
m
Air buoyancy equal to the weight of permeability, µr.
F b 5 v·ρ a ·g 5 ρ a ·g the displaced air.
ρ 3.1.8.2 (permanent) magnetization (M)—parameter that
specifies a magnetic state of material bodies such as weights, in
Vertical component of the magnetic
F z 5 µ o eee s M 1 χ H d
≠H
dV interaction between the weight and the absence of an external magnetic field (most generally,
v
≠z the balance or the environment, or magnetization is a vector whose magnitude and direction are
both. not necessarily constant within the material). The magnetiza-
H and M are vectors; z is the vertical cartesian coordinate. tion of a body generates an inhomogeneous magnetic field in
If magnetic effects are negligible, that is, the permanent space and thus may produce magnetic forces on other materi-
iTeh Standards
magnetization (M) of the weight and the magnetic suscepti-
bility (χ) are sufficiently small, and the balance is calibrated
als.
3.1.9 mass—physical quantity, which can be ascribed to any
(https://standards.iteh.ai)
with reference weights of well-known mass, the balance can
be used to indicate the conventional mass, mc, of a body
under conventionally chosen conditions.
material object and which gives a measure of its quantity of
matter. The unit of mass is the kilogram.

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3.1.3 calibration (of weights)—the acts of determining the
mass difference between a standard of known mass value and
3.1.10 maximum permissible errors—the maximum amount
by which the sum of the conventional mass of the weight, its
deviation from nominal value, and its associated uncertainty is
an “unknown” test weight or set of weights, establishing the allowed to deviate from the assigned nominal value.
mass value and conventional mass value of the “unknown,” ASTM E617-18
3.1.11 metrological traceability—property of a measure-
andhttps://standards.iteh.ai/catalog/standards/sist/a1a870f8-33e8-487a-8f75-fe2eaa0d3266/astm-e617-18
of determining a quantitative estimate of the uncertainty to
be assigned to the stated mass or conventional mass value of ment result whereby the result can be related to a reference
the “unknown,” or both, and providing metrological traceabil- through a documented unbroken chain of calibrations, each
ity to the “unknown.” contributing to the measurement uncertainty. Metrological
traceability requires an established calibration hierarchy. Ele-
3.1.3.1 calibration (generally)—set of operations that ments for confirming metrological traceability to be an unbro-
establish, under specified conditions, the relationship between ken chain to an international measurement standard or a
values of quantities indicated by a measuring instrument or national measurement standard (IPK or NPS), shall include a
measuring system, or values represented by a material measure documented measurement uncertainty, a documented measure-
or a reference material, and the corresponding values realized ment procedure, accredited technical competence, metrological
by standards. traceability to the SI, and established calibration intervals (see
3.1.4 calibration certificate—certificate issued by calibra- current VIM: JCGM 200).
tion laboratories to document the results of a calibration. 3.1.12 reference standard—a standard, generally of the
3.1.5 conventional mass—conventional value of the result highest metrological quality available at a given location, from
of weighing in air, in accordance to International Recommen- which measurements made at that location are derived.
dation OIML D 28. For a weight taken at 20°C, the conven- 3.1.13 roughness parameter or R-parameter (Ra or Rz)—
tional mass is the mass of a reference weight of a density of parameter that describes the assessed roughness profile of a
3 3
8000 kg/m which it balances in air of density of 1.2 kg/m . sample. The letter R is indicative of the type of assessed
3.1.6 correction—mass values are traditionally expressed by profile, in this case R for roughness profile. The assessed
two numbers, one being the nominal mass of the weight, and profile of a sample can be in terms of different profile types: a
the second being a correction. The mass of the weight is the roughness profile or R-parameter, primary profile or
P-parameter, a waviness profile or W-parameter.
6
Available from Euramet, Bundesallee 100, 38116 Braunschweig, Germany, 3.1.14 set of weights—a series of weights, usually presented
http://www.euramet.org. in a case so arranged to make possible any weighing of all

2
 E617 − 18
loads between the mass of the weight with the smallest nominal Symbol Unit Definition
value and the sum of the masses of all weights of the series ∆I2 kg indication difference using an
automatic exchange mechanism with
with a progression in which the mass of the smallest nominal weights in reversed position
value weight constitutes the smallest step of the series. ∆Is kg change in indication of balance due to
sensitivity weight
3.1.15 temperature (t)—in degrees Celsius, is related to the i – subscript used as an index in
absolute thermodynamic temperature scale, called the Kelvin summations
j – subscript for number of test weights or
scale, by t = T – 273.15 K. number of series of measurements
3.1.16 test weight (mt)—weight that is to be tested according k – coverage factor, typically 2 or 3
M A m–1 permanent magnetization (see also
to this standard. µ0M)
3.1.17 tolerance test—verification that the conventional m kg mass of a rigid body (weight)
∆m kg mass difference, usually between test
mass of the weights and their corresponding uncertainties as and reference weight
tested are correct within the maximum permissible errors of the δm kg maximum permissible error on the
respective weight class. weights
m0 kg mass, nominal value of the weight
3.1.18 uncertainty—non-negative parameter characterizing (e.g. 1 kg)
mc kg conventional mass of the weight
the dispersion of the quantity values being attributed to a ∆mc kg conventional mass difference between
measurand, based on the information used. test weight and reference weight
¯
∆m kg average conventional mass difference
3.1.19 units—the units used are: (1) for mass, the milligram c
between test weight and reference
(mg), the gram (g) and the kilogram (kg); (2) for density, the weight
kilogram per cubic meter (kg m–3). mcr kg conventional mass of the reference
weight
3.1.20 U.S. National prototype standard—platinum-iridium mct kg conventional mass of the test weight
ms kg mass of the sensitivity weight
kilogram identified as K20, maintained at the National Institute mt kg mass of the test weight
of Standards and Technology, with value assigned relative to n – subscript for number of measurement
the International Prototype Kilogram provides the United sequences
States access to the mass unit.
iTeh Standards
3.1.21 weight—material measure of mass, regulated in re-
p
Ra
Pa
µm
barometric pressure
mean height of roughness profile (R-
parameter)

dimensions, material, surface(https://standards.iteh.ai)

Rz µm maximum height of roughness profile
gard to its physical and metrological characteristics: shape, (R-parameter)
quality, nominal value, density, r – subscript for reference weight

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magnetic properties and maximum permissible error. s – subscript for sensitivity weight
s kg standard deviation
s2 kg2 variance
NOTE 1—The term “weight” is also used as the physical quantity of the
T K thermodynamic temperature using the
gravitational force of a body. From the context it is usually clear in which International Temperature Scale of
sense the term is used. If the sense is not clear, one may use the words 1990 (ITS-90)
“weight force” or “weight piece,” depending on its meaning.ASTM E617-18 ∆T* °C initial difference between weight tem-
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3.2 Symbols: t –
perature and laboratory temperature
subscript for test weight
Symbol Unit Definition t °C temperature in degrees Celsius, where
A – represents weighing the reference t = T– 273.15 K
weight in a weighing cycle U kg uncertainty, expanded uncertainty
B – represents weighing the test weight in u kg uncertainty, standard uncertainty
a weighing cycle ub kg uncertainty of air buoyancy correction
C – correction factor for air buoyancy uba kg uncertainty of the balance
D kg difference of balance readings uc kg combined standard uncertainty
between minimum and maximum ud kg uncertainty due to the display resolu-
values from eccentricity test tion of a digital balance
d kg scale interval uE kg uncertainty due to eccentricity
d1 m estimated distance between centers of uF kg m–3 uncertainty of the formula used to cal-
weights during loading culate air density
d2 m estimated distance from the center of uhr % uncertainty in relative humidity
the load receptor to one of the corners uinst kg uncertainty due to instability of the ref-
Fb N air buoyancy equal to the weight of the erence weight
displaced air uma kg uncertainty due to magnetism
Fg N gravitational force up Pa uncertainty in barometric pressure
Fz N magnetic force between a mass us kg uncertainty due to the sensitivity of the
comparator and a weight in the vertical balance
or z-direction ut °C uncertainty in temperature
g m s–2 gravitational acceleration uw kg uncertainty due to the weighing pro-
H A m–1 magnetizing field strength cess
hr % relative humidity V m3 volume of a solid body (weight)
I kg indication of the weighing instruments z m vertical cartesian coordinate
(scale division) µ N A–2 magnetic permeability
∆I kg indication difference of the balance, µ0 N A–2 magnetic constant (magnetic perme-
where ∆I = It – Ir ability of vacuum), µ0 = 4π × 10–7 N
∆I1 kg indication difference using an A–2
automatic exchange mechanism with µ0M T magnetic polarization
weights in first position µr – relative magnetic permeability (µ/µ0)

3
 E617 − 18

Symbol Unit Definition another. See Table 2. The shape of weights smaller than 1 mg
veff – effective degrees of freedom shall be discussed and verified with the customer.
ρ kg m–3 mass of a rigid body (weight)
ρ0 kg m–3 density of air as a reference value
5.1.3 Class 1, 2, 3, 4, 5, 6, and 7 may be either Type I or
equal to 1.2 kg m–3 Type II depending on the application.
ρa kg m–3 density of moist air
ρal kg m–3 density of moist air during the last 5.2 Design—A weight may have any shape that does not
(previous) calibration of the reference introduce features that reduce the reliability. All weights shall
weight
ρr kg m–3 density of a reference weight with
be free of ragged or sharp edges or ends. Both sheet metal and
mass mr wire weights shall be free of cracks such as may be formed
ρt kg m–3 density of the weight being tested from bending.
χ – magnetic susceptibility
5.3 Surface Area—For classes 000, 00, 0, 1, 2, 3, and 4 the
4. Maximum Permissible Errors surface area is not to exceed twice the area of a cylinder of
equal height and diameter for weights 1 g and above. Sheet
4.1 For each weight, the expanded uncertainty U at approxi-
metal weights or wire weights may be used below 1 g. For
mately 95 % confidence (See Section 9) of the conventional
Classes 5, 6, and 7 the total surface areas should be minimized
mass shall be less than or equal to one-third of the maximum
to the extent possible.
permissible error given in Table 1 as defined in Section 9.
Subsequent calibrations must meet all the requirements (in- 5.4 Material:
cluding environmental parameters as shown in Table 11, of 5.4.1 Class 000, 00, 0, 1, 2, 3, 4, and 5 Weights—The
Sections 7, 8, and 9; and the requirements of ISO/IEC hardness of this material and its resistance to wear and
17025:2005, 5.10.4.2 to make any claim of compliance to corrosion shall be similar to or better than that of austenitic
Specification E617, Maximum Permissible Errors, weight stainless steel.
classes, or metrological traceability. 5.4.2 Classes 6 and 7—Cylindrical class 6 and 7 weights
4.1.1 For each weight, the conventional mass, mc (deter- below 5 kg and class 6 and 7 weights below 100 g shall be
mined with an expanded uncertainty), shall not differ by more made of steel or a material whose hardness and resistance to
than the difference: maximum permissible error δm minus corrosion is similar or better than that of steel. Other class 6
iTeh Standards
expanded uncertainty, from the nominal value of the weight,
m o:
and 7 weights of 5 kg or greater shall be made of grey cast iron
or of another material whose brittleness and resistance to
~
(https://standards.iteh.ai)
! ~ ! ~
m o 2 δm 2 U # m c # m o 1 δm 2 U !
4.2 Maximum permissible errors for classes 000, 00, 0, 1, 2,
(1)
corrosion is similar or better than that of grey cast iron. The
surface of the weights may be treated with a suitable coating in
order to improve their corrosion resistance. This coating shall
Document
3, 4, 5, 6, and 7 are given in Table 1. These maximum
permissible errors apply to conventional mass values. Preview withstand shocks and outdoor weather conditions.
5.5 Magnetism—Weights shall not exceed maximum per-
4.3 Maximum Permissible Errors for weights of denomina- missible magnetic properties as listed in Tables 3 and 4 for any
tion intermediate between those listed, the maximum ASTM E617-18
permis- portion of the weight. If the values of all local measurements of
sible error shall be proportional to the values shown.
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magnetization and susceptibility are less than these limits, then
4.4 For class 000, 00, and 0 weights, which are always it may be assumed that the uncertainty components due to the
accompanied by certificates giving the mass values and magnetism of the weight are negligible. The maximum perma-
uncertainties, the deviation from the nominal value, mc – m0, nent magnetization and magnetic susceptibilities given in
shall be taken into account by the user. Tables 3 and 4 are such that, at magnetic fields and magnetic
field gradients possibly present on balance pans, they produce
5. Physical Characteristics a change of the conventional mass of less than 1/10 of the
5.1 Construction: maximum permissible error of the test weight.
5.1.1 Type—Weights are divided into two types based upon NOTE 2—Magnetic susceptibility may be tested in accordance with
the design: OIML R 111-1, Annex B. Cast iron cannot have a susceptibility specifi-
5.1.1.1 Type I—These weights are of one-piece construction cation of any real value.
and contain no added adjusting material. They must be 5.6 Density—Because of the effect of the buoyant force of
specified when weights are to be used as standards for the air on a weight, precision measurements of mass require that
calibration of weights of Classes 000, 00, 0, 1, 2, and 3, and the volume of the weight be known, as well as the density of
where maximum stability is required. A precise measurement the air in which it is being measured, so that appropriate
of density can only be made for one-piece weights. corrections can be made. For weights of higher precision, the
5.1.1.2 Type II—Weights of this type can be of any appro- range of density is limited to values at or near the density of
priate design such as screw knob, ring, or sealed plug. well-established standards, such as are used by primary cali-
Adjusting material can be used provided it is of a material at bration laboratories. For Class 000 and 00, the manufacturer
least as stable as the base material and is contained in such a shall provide a measured value for the density of the weights at
way that it will not become separated from the weight. time of manufacture. Use of a sample taken adjacent to the
5.1.2 Class 000, 00, and 0 shall be Type I, one piece material from which the weight is manufactured to measure the
construction. Weights with nominal values less than 1 g shall density is permitted, however an additional uncertainty com-
have unique shapes to differentiate the weights from one ponent equal to 5 × 10–5 must be combined with the standard

4
 E617 − 18
TABLE 1 Maximum Permissible Errors
NOTE 1—Maximum Permissible Errors are reported in SI units, typically milligrams.
NOTE 2—The “grain” is the same in avoirdupois, troy, and apothecaries units of mass.
NOTE 3—See NIST SP 811 and NIST SP 1038 for conversion and units of measure.
±mg except as noted
Denomination
Class 000 Class 00 Class 0 Class 1 Class 2 Class 3 Class 4 Class 5 Class 6 Class 7
Metric
5000 kg 25 g 50 g 100 g 250 g 500 g 750 g
3000 kg 15 g 30 g 60 g 150 g 300 g 450 g
2000 kg 10 g 20 g 40 g 100 g 200 g 300 g
1000 kg 5.0 g 10 g 20 g 50 g 100 g 150 g
500 kg 2.5 g 5.0 g 10 g 25 g 50 g 75 g
300 kg 1.5 g 3.0 g 6.0 g 15 g 30 g 45 g
200 kg 1.0 g 2.0 g 4.0 g 10 g 20 g 30 g
100 kg 500 mg 1.0 g 2.0 g 5.0 g 10 g 15 g
50 kg 13 mg 25 mg 63 mg 120 mg 250 500 mg 1.0 g 2.5 g 5.0 g 7.5 g
30 kg 7.5 15 38 75 150 300 600 mg 1.5 g 3.0 g 4.5 g
25 kg 6.25 12.5 31 62 125 250 500 1.2 g 2.5 g 3.8 g
20 kg 5.0 10 25 50 100 200 400 1.0 g 2.0 g 3.8 g
10 kg 2.5 5.0 13 25 50 100 200 500 mg 1.0 g 2.2 g
5 kg 1.3 2.5 6.0 12 25 50 100 250 500 mg 1.4 g
3 kg 0.75 1.5 3.8 7.5 15 30 60 150 300 1.0 g
2 kg 0.5 1.0 2.5 5.0 10 20 40 100 200 750 mg
1 kg 0.25 0.5 1.3 2.5 5.0 10 20 50 100 470
500 g 0.13 0.25 0.60 1.2 2.5 5.0 10 30 50 300
300 g 0.075 0.15 0.38 0.75 1.5 3.0 6.0 20 30 210
200 g 0.05 0.10 0.25 0.50 1.0 2.0 4.0 15 20 160
100 g 0.025 0.05 0.13 0.25 0.50 1.0 2.0 9.0 10 100
50 g 0.015 0.030 0.060 0.12 0.25 0.60 1.2 5.6 7.0 62
30 g 0.014 0.026 0.037 0.074 0.15 0.45 0.90 4.0 5.0 44
20 g
10 g
5g
0.013
0.010
0.005
iTeh Standards
0.025
0.020
0.010
0.037
0.025
0.017
0.074
0.050
0.034
0.10
0.074
0.054
0.35
0.25
0.18
0.70
0.50
0.36
3.0
2.0
1.3
3.0
2.0
2.0
33
21
13
3g
2g
1g
0.005
0.005
0.005
(https://standards.iteh.ai)
0.010
0.010
0.010
0.017
0.017
0.017
0.034
0.034
0.034
0.054
0.054
0.054
0.15
0.13
0.10
0.30
0.26
0.20
0.95
0.75
0.50
2.0
2.0
2.0
9.4
7.0
4.5

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500 mg 0.002 0.003 0.005 0.010 0.025 0.080 0.16 0.38 1.0 3.0
300 mg 0.002 0.003 0.005 0.010 0.025 0.070 0.14 0.30 1.0 2.2
200 mg 0.002 0.003 0.005 0.010 0.025 0.060 0.12 0.26 1.0 1.8
100 mg 0.002 0.003 0.005 0.010 0.025 0.050 0.10 0.20 1.0 1.2
50 mg 0.002 0.003 0.005 0.010 0.014 0.042 0.085 0.16 0.88
30 mg
20 mg
0.002
0.002
0.003
0.003
ASTM E617-18
0.005
0.005
0.010
0.010
0.014
0.014
0.038
0.035
0.075
0.070
0.14
0.12
0.68
0.56
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10 mg 0.002 0.003 0.005 0.010 0.014 0.030 0.060 0.10 0.40
5 mg 0.002 0.003 0.005 0.010 0.014 0.028 0.055 0.080
3 mg 0.002 0.003 0.005 0.010 0.014 0.026 0.052 0.070
2 mg 0.002 0.003 0.005 0.010 0.014 0.025 0.050 0.060
1 mg 0.002 0.003 0.005 0.010 0.014 0.025 0.050 0.050
0.5 mg 0.002 0.003 0.005 0.010 0.014 0.025 0.050 0.050
0.3 mg 0.002 0.003 0.005 0.010 0.014 0.025
0.2 mg 0.002 0.003 0.005 0.010 0.014
0.1 mg 0.002 0.003 0.005 0.010
0.05 mg 0.002 0.003 0.005 0.010
Avoirdupois Class 0 Class 1 Class 2 Class 3 Class 4 Class 5 Class 6 Class 7
Pound mg mg mg g & mg g & mg g & mg g & mg g & mg
10000 lb 45 g 91 g 230 g 450 g 680 g
5000 lb 23 g 45 g 110 g 230 g 340 g
3000 lb 14 g 27 g 68 g 140 g 200 g
2500 lb 11 g 23 g 57 g 110 g 170 g
2000 lb 9.1 g 18 g 45 g 91 g 140 g
1000 lb 4.5 g 9.1 g 23 g 45 g 68 g
500 lb 2.3 g 4.5 g 11 g 23 g 34 g
300 lb 1.4 g 2.7 g 6.8 g 14 g 20 g
200 lb 910 mg 1.8 g 4.5 g 9.1 g 14 g
100 lb 57 110 230 450 910 mg 2.3 g 4.5 g 6.8 g
50 lb 29 57 110 230 450 1.1 g 2.3 g 4.1 g
30 lb 17 32 68 140 270 680 mg 1.4 g 2.7 g
25 lb 14 28 57 110 230 570 1.1 g 2.4 g
20 lb 12 23 45 91 180 450 910 mg 2.0 g
10 lb 5.5 11 23 45 91 230 450 1.3 g
5 lb 2.7 5.4 11 23 45 110 230 780 mg
3 lb 1.7 3.4 6.8 14 27 68 140 580
2 lb 1.2 2.3 4.5 9.1 18 45 91 440
1 lb 0.55 1.1 2.3 4.5 9.1 23 45 270

5
 E617 − 18
TABLE 1 Continued
±mg except as noted
Denomination
Class 000 Class 00 Class 0 Class 1 Class 2 Class 3 Class 4 Class 5 Class 6 Class 7
0.5 lb 0.27 0.54 1.1 2.3 4.5 16 23 170
0.3 lb 0.17 0.34 0.68 1.4 2.7 11 14 120
0.2 lb 0.12 0.23 0.45 0.91 1.8 8.2 9.1 97
0.1 lb 0.055 0.11 0.23 0.45 1.1 5.4 6.8 59
0.05 lb 0.027 0.054 0.11 0.36 0.77 3.3 4.5 37
0.03 lb 0.017 0.034 0.068 0.32 0.59 2.4 3.2 26
0.02 lb 0.017 0.034 0.045 0.23 0.45 1.9 2.3 20
0.01 lb 0.012 0.023 0.034 0.16 0.34 1.2 1.4 12
0.005 lb 0.0075 0.015 0.024 0.14 0.27 0.86 0.91 7.8
0.003 lb 0.0075 0.015 0.024 0.11 0.22 0.64 0.91 5.4
0.002 lb 0.0075 0.015 0.024 0.091 0.19 0.50 0.91 4.2
0.001 lb 0.0075 0.015 0.024 0.068 0.15 0.36 0.91 2.9
0.0005 lb 0.0045 0.0091 0.023 0.064 0.13 0.27 2.1
0.0003 lb 0.0045 0.0091 0.023 0.054 0.11 0.23 1.5
0.0002 lb 0.0045 0.0091 0.023 0.045 0.095 0.20 1.2
0.0001 lb 0.0045 0.0091 0.023 0.041 0.086 0.16 0.84
0.00005 lb 0.0045 0.0091 0.014 0.036 0.073 0.14
0.00003 lb 0.0045 0.0091 0.014 0.032 0.064 0.11
0.00002 lb 0.0045 0.0091 0.014 0.029 0.059 0.091
0.00001 lb 0.0045 0.0091 0.014 0.027 0.054 0.091
0.000005 lb 0.0045 0.0091 0.014 0.023 0.054 0.091
0.000003 lb 0.0045 0.0091 0.014 0.023 0.054 0.091
0.000002 lb 0.0045 0.0091 0.014 0.023 0.054 0.091
0.000001 lb 0.0045 0.0091 0.014 0.023 0.054 0.091
Avoirdupois Class 0 Class 1 Class 2 Class 3 Class 4 Class 5 Class 6 Class 7
Ounce mg mg mg mg mg mg mg mg
10 oz 0.35 0.70 1.4 2.8 5.4 19 23 200
8 oz 027 0.54 1.1 2.3 4.5 16 23 170
5 oz 0.18 0.35 0.71 1.4 2.8 12 11 130

iTeh Standards
4 oz 0.14 0.28 0.57 1.1 2.3 9.5 11 110
3 oz 0.10 0.21 0.43 0.91 1.8 8.2 5.4
2 oz 0.070 0.14 0.28 0.64 1.3 5.9 5.4 70

(https://standards.iteh.ai)
1 oz 0.027 0.054 0.14 0.43 0.86 3.9 3.2 42
1/2 oz 0.017 0.034 0.071 0.30 0.59 2.5 2.3 27
1/4 oz 0.011 0.023 0.034 0.20 0.43 1.6 1.4 17
1/8 oz 0.0075 0.015 0.024 0.16 0.31 1.1 0.91 10
1/16 oz
1/32 oz
1/64 oz
Document Preview
0.0075
0.0075
0.0075
0.015
0.015
0.015
0.024
0.024
0.023
0.12
0.095
0.077
0.24
0.19
0.15
0.73
0.50
0.36
0.91 6.5
4.2
2.8
0.5 oz 0.071 0.30 0.59 2.5 2.3 27
0.3 oz 0.034 0.23 0.45 1.8 1.4 19
0.2 oz ASTM E617-18 0.034 0.19 0.38 1.4 0.91 14
0.1 oz 0.024 0.14 0.29 0.91 0.91 9.0
https://standards.iteh.ai/catalog/standards/sist/a1a870f8-33e8-487a-8f75-fe2eaa0d3266/astm-e617-18
0.05 oz 0.024 0.11 0.23 0.64 0.91 5.7
0.03 oz 0.024 0.095 0.19 0.45 0.91 4.1
0.02 oz 0.024 0.077 0.18 0.40 0.91 3.2
0.01 oz 0.023 0.064 0.14 0.30 0.91 2.2
0.005 oz 0.023 0.054 0.11 0.23 1.5
0.003 oz 0.023 0.050 0.095 0.19 1.1
0.002 oz 0.023 0.044 0.086 0.16 0.92
0.001 oz 0.023 0.038 0.077 0.13 0.66
0.0005 oz 0.014 0.032 0.064 0.11 0.47
0.0003 oz 0.014 0.029 0.059 0.095
0.0002 oz 0.014 0.027 0.054 0.086
0.0001 oz 0.014 0.026 0.050 0.073
Troy Ounce Class 0 Class 1 Class 2 Class 3 Class 4 Class 5 Class 6 Class 7
mg mg g & mg
1000 oz t 310 mg 620 mg 1.6 g
500 oz t 160 310 780 mg
300 oz t 91 190 470
200 oz t 62 120 310
100 oz t 31 62 160
50 oz t 16 31 78
30 oz t 9.1 19 47
20 oz t 6.2 12 35
10 oz t 3.1 6.2 21
5 oz t 1.6 3.1 12
3 oz t 0.91 1.9 8.4
2 oz t 0.71 1.4 6.5
1 oz t 0.45 0.91 4.2
0.5 oz t 0.31 0.62 2.6
0.3 oz t 0.24 0.49 1.9
0.2 oz t 0.20 0.40 1.5
0.1 oz t 0.15 0.30 0.97