ASTM E126-13
(Test Method)Standard Test Method for Inspection, Calibration, and Verification of ASTM Hydrometers
Standard Test Method for Inspection, Calibration, and Verification of ASTM Hydrometers
SIGNIFICANCE AND USE
4.1 The purpose of this test method is to establish a common method by which manufacturers, calibration laboratories, and users of hydrometers may inspect, verify, or calibrate them.
4.2 The goal is to provide a standard method that is simple, easily understood, and will produce reliable results.
SCOPE
1.1 This test method describes the principles, apparatus, and procedures for the inspection, calibration, and verification of ASTM glass hydrometers. This test method is applicable to ASTM hydrometers and may be used for other general hydrometers of the constant-mass, variable-displacement type.Note 1— User must determine the applicability of this method for hydrometers other than ASTM hydrometers. Method studies were completed for ASTM hydrometers only and the precision and bias statements were developed using ASTM hydrometers only. References to other types of hydrometers are for user information only.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. The metric equivalents of inch-pound units may be approximate.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:E126 −13
StandardTest Method for
Inspection, Calibration, and Verification of ASTM
1
Hydrometers
This standard is issued under the fixed designation E126; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope E1 Specification for ASTM Liquid-in-Glass Thermometers
E77 Test Method for Inspection and Verification of Ther-
1.1 This test method describes the principles, apparatus, and
mometers
procedures for the inspection, calibration, and verification of
E100 Specification for ASTM Hydrometers
ASTM glass hydrometers. This test method is applicable to
E344 Terminology Relating to Thermometry and Hydrom-
ASTM hydrometers and may be used for other general
etry
hydrometers of the constant-mass, variable-displacement type.
E2251 Specification for Liquid-in-Glass ASTM Thermom-
NOTE 1— User must determine the applicability of this method for
eters with Low-Hazard Precision Liquids
hydrometers other than ASTM hydrometers. Method studies were com-
pleted for ASTM hydrometers only and the precision and bias statements
3. Terminology
were developed usingASTM hydrometers only. References to other types
of hydrometers are for user information only.
3.1 Definitions—The definitions given inTerminology E344
apply.
1.2 The values stated in inch-pound units are to be regarded
asthestandard.Thevaluesgiveninparenthesesaremathemati-
3.2 Definitions of Terms Specific to This Standard:
cal conversions to SI units that are provided for information
3.2.1 API gravity, n—a relative index of density for petro-
onlyandarenotconsideredstandard.Themetricequivalentsof
leum products developed by theAmerican Petroleum Institute.
inch-pound units may be approximate.
API gravity is defined as:
1.3 This standard does not purport to address all of the
API Gravity,deg 5 @141.5/~rel. density 60/60 °F!# 2 131.5 (1)
safety concerns, if any, associated with its use. It is the
Values of API gravity are typically expressed in degrees API,
responsibility of the user of this standard to establish appro- that is, 39.60 °API.
priate safety and health practices and determine the applica-
3.2.2 comparator, n—in this test method, a glass or other
bility of regulatory limitations prior to use.
transparent cylinder to contain a liquid in which hydrometers
may be inter-compared. Examples of suitable comparators are
2. Referenced Documents
given in Appendix X1.
2
2.1 ASTM Standards:
3.2.3 density, n—mass of a unit volume of material.
D1265 Practice for Sampling Liquefied Petroleum (LP)
3.2.3.1 Discussion—Unitsofdensityinhydrometersinclude
3
Gases, Manual Method
kg/l (kilograms per liter), kg/m (kilograms per cubic meter),
D1298 Test Method for Density, Relative Density, or API
and g/l (grams per liter); each typically expressed as mass per
3
Gravity of Crude Petroleum and Liquid Petroleum Prod-
volume at a specified temperature, that is, kg/m at 15 °C. As
ucts by Hydrometer Method 3
of this writing, only the kg/m at 15 °C scale is offered in
D1657 Test Method for Density or Relative Density of Light
ASTM hydrometers (see Specification E100).
Hydrocarbons by Pressure Hydrometer
3.2.4 relative density (formerly specific gravity), n—ratio of
the mass of a given volume of material at a stated temperature
1 tothemassofanequalvolumeofgas-freedistilledwateratthe
This test method is under the jurisdiction of ASTM Committee E20 on
Temperature Measurement and is the direct responsibility of Subcommittee E20.05 same or different temperature. Both reference temperatures
on Liquid-in-Glass Thermometers and Hydrometers.
shall be explicitly stated.
Current edition approved May 1, 2013. Published August 2013. Originally
3.2.4.1 Discussion—Common reference temperatures in-
approved in 1959. Last previous edition approved in 2012 as E126 – 12. DOI:
clude 60 °F/60 °F, 20 °C/20 °C, 20 °C/4 °C. The historic term,
10.1520/E0126-13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
specific gravity, may still be found.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3.2.5 specific gravity, n—historic term, replaced by relative
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. density.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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E126−13
3.2.6 thermo-hydrometer, n—glass hydrometer having a 6.2 Standards shall be calibrated by either a national me-
thermometer combined with a
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: E126 − 12 E126 − 13
Standard Test Method for
Inspection, Calibration, and Verification of ASTM
1
Hydrometers
This standard is issued under the fixed designation E126; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope
1.1 This test method describes the principles, apparatus, and procedures for the inspection, calibration, and verification of
ASTM glass hydrometers. This test method is applicable to ASTM hydrometers and may be used for other general hydrometers
of the constant-mass, variable-displacement type.
NOTE 1— User must determine the applicability of this method for hydrometers other than ASTM hydrometers. Method studies were completed for
ASTM hydrometers only and the precision and bias statements were developed using ASTM hydrometers only. References to other types of hydrometers
are for user information only.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard. The metric equivalents of
inch-pound units may be approximate.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
D1265 Practice for Sampling Liquefied Petroleum (LP) Gases, Manual Method
D1298 Test Method for Density, Relative Density, or API Gravity of Crude Petroleum and Liquid Petroleum Products by
Hydrometer Method
D1657 Test Method for Density or Relative Density of Light Hydrocarbons by Pressure Hydrometer
E1 Specification for ASTM Liquid-in-Glass Thermometers
E77 Test Method for Inspection and Verification of Thermometers
E100 Specification for ASTM Hydrometers
E344 Terminology Relating to Thermometry and Hydrometry
E2251 Specification for Liquid-in-Glass ASTM Thermometers with Low-Hazard Precision Liquids
3. Terminology
3.1 Definitions—The definitions given in Terminology E344 apply.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 API gravity, n—a relative index of density for petroleum products developed by the American Petroleum Institute. API
gravity is defined as:
API Gravity,deg 5 @141.5/~rel. density 60/60 °F!# 2 131.5 (1)
Values of API gravity are typically expressed in degrees API, that is, 39.60 °API.
1
This test method is under the jurisdiction of ASTM Committee E20 on Temperature Measurement and is the direct responsibility of Subcommittee E20.05 on
Liquid-in-Glass Thermometers and Hydrometers.
Current edition approved Nov. 15, 2012May 1, 2013. Published December 2012August 2013. Originally approved in 1959. Last previous edition approved in 20052012
as E126 – 05a.E126 – 12. DOI: 10.1520/E0126-12.10.1520/E0126-13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
E126 − 13
3.2.2 comparator, n—in this test method, a glass or other transparent cylinder to contain a liquid in which hydrometers may be
inter-compared. Examples of suitable comparators are given in Appendix X1.
3.2.3 density, n—mass of a unit volume of material.
3.2.3.1 Discussion—
3
Units of density in hydrometers include kg/l (kilograms per liter), kg/m (kilograms per cubic meter), and g/l (grams per liter); each
3 3
typically expressed as mass per volume at a specified temperature, that is, kg/m at 15 °C. As of this writing, only the kg/m at
15 °C scale is offered in ASTM hydrometers (see Specification E100).
3.2.4 relative density (formerly specific gravity), n—ratio of the mass of a given volume of material at a stated temperature to
the mass of an equal volume of gas-free distilled water at the same or different temperature. Both reference temperatures shall be
explicitl
...
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