ASTM D2624-15
(Test Method)Standard Test Methods for Electrical Conductivity of Aviation and Distillate Fuels
Standard Test Methods for Electrical Conductivity of Aviation and Distillate Fuels
SIGNIFICANCE AND USE
5.1 The ability of a fuel to dissipate charge that has been generated during pumping and filtering operations is controlled by its electrical conductivity, which depends upon its content of ion species. If the conductivity is sufficiently high, charges dissipate fast enough to prevent their accumulation and dangerously high potentials in a receiving tank are avoided.
SCOPE
1.1 These test methods cover the determination of the electrical conductivity of aviation and distillate fuels with and without a static dissipator additive. The test methods normally give a measurement of the conductivity when the fuel is uncharged, that is, electrically at rest (known as the rest conductivity).
1.2 Two test methods are available for field tests of fuel conductivity. These are: (1) portable meters for the direct measurement in tanks or the field or laboratory measurement of fuel samples, and (2) in-line meters for the continuous measurement of fuel conductivities in a fuel distribution system. In using portable meters, care must be taken in allowing the relaxation of residual electrical charges before measurement and in preventing fuel contamination.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 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. For specific precautionary statements, see 7.1, 7.1.1, and 11.2.1.
General Information
Buy Standard
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D2624 − 15 An American National Standard
Designation: 274/99
Standard Test Methods for
1
Electrical Conductivity of Aviation and Distillate Fuels
This standard is issued under the fixed designation D2624; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber 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 U.S. Department of Defense.
1. Scope* D4308Test Method for Electrical Conductivity of Liquid
Hydrocarbons by Precision Meter
1.1 These test methods cover the determination of the
electrical conductivity of aviation and distillate fuels with and
3. Terminology
without a static dissipator additive. The test methods normally
give a measurement of the conductivity when the fuel is
3.1 Definitions:
uncharged, that is, electrically at rest (known as the rest
3.1.1 picosiemens per metre, n—the unit of electrical con-
conductivity).
ductivity is also called a conductivity unit (CU). A siemen is
the SI definition of reciprocal ohm sometimes called mho.
1.2 Two test methods are available for field tests of fuel
conductivity. These are: (1) portable meters for the direct 212 21 21
1 pS/m 51 310 Ω m 51cu 51 picomho/m (1)
measurementintanksorthefieldorlaboratorymeasurementof
3.1.2 rest conductivity, n—thereciprocaloftheresistivityof
fuel samples, and (2) in-line meters for the continuous mea-
uncharged fuel in the absence of ionic depletion or polariza-
surementoffuelconductivitiesinafueldistributionsystem.In
tion.
using portable meters, care must be taken in allowing the
3.1.2.1 Discussion—It is the electrical conductivity at the
relaxation of residual electrical charges before measurement
initial instant of current measurement after a dc voltage is
and in preventing fuel contamination.
impressed between electrodes, or a measure of the average
1.3 The values stated in SI units are to be regarded as
current when an alternating current (ac) voltage is impressed.
standard. No other units of measurement are included in this
standard.
4. Summary of Test Methods
1.4 This standard does not purport to address all of the
4.1 Avoltageisappliedacrosstwoelectrodesinthefueland
safety concerns, if any, associated with its use. It is the
the resulting current expressed as a conductivity value. With
responsibility of the user of this standard to establish appro-
portable meters, the current measurement is made almost
priate safety and health practices and determine the applica-
instantaneously upon application of the voltage to avoid errors
bility of regulatory limitations prior to use. For specific
duetoiondepletion.Iondepletionorpolarizationiseliminated
precautionary statements, see 7.1, 7.1.1, and 11.2.1.
in dynamic monitoring systems by continuous replacement of
2. Referenced Documents
thesampleinthemeasuringcell,orbytheuseofanalternating
2
voltage. The procedure, with the correct selection of electrode
2.1 ASTM Standards:
size and current measurement apparatus, can be used to
D4306Practice for Aviation Fuel Sample Containers for
measure conductivities from 1 pS/m or greater. The commer-
Tests Affected by Trace Contamination
cially available equipment referred to in these methods covers
aconductivityrangeupto2000pS/mwithgoodprecision(see
1
These test methods are under the jurisdiction of ASTM Committee D02 on
Section 12), although some meters can only read to 500 or
Petroleum Products, Liquid Fuels, and Lubricants and are the direct responsibility
1000 pS/m.
of Subcommittee D02.J0.04 on Additives and Electrical Properties.
In the IP, these test methods are under the jurisdiction of the Standardization
4.1.1 The EMCEE Models 1150, 1152, and 1153 Meters
Committee.
and D-2 Inc. Model JF-1A-HH are available with expanded
Current edition approved April 1, 2015. Published May 2015. Originally
ranges but the precision of the extended range meters has not
approved in 1967. Last previous edition approved in 2009 as D2624–09. DOI:
10.1520/D2624-15.
been determined. If it is necessary to measure conductivities
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
below 1 pS/m, for example in the case of clay treated fuels or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
refined hydrocarbon solvents, Test Method D4308 should be
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. used.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D2624 − 1
...
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: D2624 − 09 D2624 − 15 An American National Standard
Designation: 274/99
Standard Test Methods for
1
Electrical Conductivity of Aviation and Distillate Fuels
This standard is issued under the fixed designation D2624; 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 U.S. Department of Defense.
1. Scope*
1.1 These test methods cover the determination of the electrical conductivity of aviation and distillate fuels with and without
a static dissipator additive. The test methods normally give a measurement of the conductivity when the fuel is uncharged, that
is, electrically at rest (known as the rest conductivity).
1.2 Two test methods are available for field tests of fuel conductivity. These are: (1) portable meters for the direct measurement
in tanks or the field or laboratory measurement of fuel samples, and (2) in-line meters for the continuous measurement of fuel
conductivities in a fuel distribution system. In using portable meters, care must be taken in allowing the relaxation of residual
electrical charges before measurement and in preventing fuel contamination.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 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. For specific precautionary statements, see 7.1, 7.1.1, and 11.2.1.
2. Referenced Documents
2
2.1 ASTM Standards:
D4306 Practice for Aviation Fuel Sample Containers for Tests Affected by Trace Contamination
D4308 Test Method for Electrical Conductivity of Liquid Hydrocarbons by Precision Meter
3. Terminology
3.1 Definitions:
3.1.1 picosiemens per metre, n—the unit of electrical conductivity is also called a conductivity unit (CU). A siemen is the SI
definition of reciprocal ohm sometimes called mho.
212 21 21
1 pS/m5 1310 Ω m 5 1 cu 5 1 picomho/m (1)
3.1.2 rest conductivity, n—the reciprocal of the resistivity of uncharged fuel in the absence of ionic depletion or polarization.
1
These test methods are under the jurisdiction of ASTM Committee D02 on Petroleum Products Products, Liquid Fuels, and Lubricants and are the direct responsibility
of Subcommittee D02.J0.04 on Additives and Electrical Properties.
In the IP, these test methods are under the jurisdiction of the Standardization Committee.
Current edition approved Dec. 1, 2009April 1, 2015. Published February 2010May 2015. Originally approved in 1967. Last previous edition approved in 20072009 as
D2624D2624 – 09.–07a. DOI: 10.1520/D2624-09.10.1520/D2624-15.
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.
3.1.2.1 Discussion—
It is the electrical conductivity at the initial instant of current measurement after a dc voltage is impressed between electrodes, or
a measure of the average current when an alternating current (ac) voltage is impressed.
4. Summary of Test Methods
4.1 A voltage is applied across two electrodes in the fuel and the resulting current expressed as a conductivity value. With
portable meters, the current measurement is made almost instantaneously upon application of the voltage to avoid errors due to
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D2624 − 15
ion depletion. Ion depletion or polarization is eliminated in dynamic monitoring systems by continuous replacement of the sample
in the measuring cell, or by the use of an alternating voltage. The procedure, with the correct selection of electrode size and current
measurement apparatus, can be used to measure conductivities from 1 pS/m or greater. The commercially available equipment
referred to in these methods covers a conductivity range up to 2000 pS/m with good precision (see Section
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.