ASTM D2624-01

Standard Test Methods for Electrical Conductivity of Aviation and Distillate Fuels

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: (a) portable meters for the direct measurement in tanks or the field or laboratory measurement of fuel samples, and (b) in-line meters for the continuous measurement of fuel conductivities in a fuel distribution system. In using either type of instrument, care must be taken in allowing the relaxation of residual electrical charges before measurement and in preventing fuel contamination. For specification purposes, conductivity measurements should be made with the portable meters.
1.3 The values stated in SI units are to be regarded as the 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

• Status: Historical
• Publication Date: 15-Apr-2001
• ICS: 75.160.20 - Liquid fuels
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.J0 - Aviation Fuels

Relations

• Replaced By: ASTM D2624-02 - Standard Test Methods for Electrical Conductivity of Aviation and Distillate Fuels
• Effective Date: 10-Jun-2002

Standards Content (Sample)

ASTM-D2624
ADOPTION NOTICE
ASTM-D2624, "FUELS, AVIATION AND DISTILLATE, ELECTRICAL
CONDUCTIVITY OF", was adopted on 03-OCT-94 for use by the
Department of Defense (DoD). Proposed changes by DoD
activities must be submitted to the DoD Adopting Activity:
ASC/ENSI, Building 560, 2530 Loop Road West, Wright-Patterson
AFB, OH 45433-7101. Copies of this document may be purchased
from the American Society for Testing and Materials 100 Barr
Harbor Drive West Conshohocken, Pennsylvania, United States,
19428-2959. http://www.astm.org/____________________
Custodians: Adopting Activity:
Army - CR4 Air Force - 11
Navy - AS
Air Force - 11
FSC 9130
Approved for public release; distribution
DISTRIBUTION STATEMENT A:
is unlimited.

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Designation: D 2624 – 01 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 D 2624; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
Note—Table 2 was included editorially and the year date changed on April 16, 2001.
1. Scope 3. Terminology
1.1 These test methods cover the determination of the 3.1 Definitions:
electrical conductivity of aviation and distillate fuels with and 3.1.1 picosiemens per metre, n—the unit of electrical con-
without a static dissipator additive. The test methods normally ductivity is also called a conductivity unit (CU). A siemen is
give a measurement of the conductivity when the fuel is the SI definition of reciprocal ohm sometimes called mho.
uncharged, that is, electrically at rest (known as the rest
212 21 21
1 pS/m 5 1 3 10 V m 5 1cu 5 1 picomho/m (1)
conductivity).
3.1.2 rest conductivity, n—the reciprocal of the resistivity of
1.2 Two test methods are available for field tests of fuel
uncharged fuel in the absence of ionic depletion or polariza-
conductivity. These are: (a) portable meters for the direct
tion.
measurement in tanks or the field or laboratory measurement of
3.1.2.1 Discussion— It is the electrical conductivity at the
fuel samples, and (b) in-line meters for the continuous mea-
initial instant of current measurement after a d-c voltage is
surement of fuel conductivities in a fuel distribution system. In
impressed between electrodes.
using either type of instrument, care must be taken in allowing
the relaxation of residual electrical charges before measure-
4. Summary of Test Methods
ment and in preventing fuel contamination. For specification
4.1 A voltage is applied across two electrodes in the fuel and
purposes, conductivity measurements should be made with the
the resulting current expressed as a conductivity value. With
portable meters.
portable meters, the current measurement is made almost
1.3 The values stated in SI units are to be regarded as the
instantaneously upon application of the voltage to avoid errors
standard.
due to ion depletion. Ion depletion or polarisation is eliminated
1.4 This standard does not purport to address all of the
in dynamic monitoring systems by continuous replacement of
safety concerns, if any, associated with its use. It is the
the sample in the measuring cell. The procedure, with the
responsibility of the user of this standard to establish appro-
correct selection of electrode size and current measurement
priate safety and health practices and determine the applica-
apparatus, can be used to measure conductivities from 1 pS/m
bility of regulatory limitations prior to use. For specific
or greater. The commercially available equipment referred to in
precautionary statements, see 7.1, 7.1.1, and 11.2.1.
these methods covers a conductivity range up to 2000 pS/m
2. Referenced Documents with good precision (see Section 12), although some meters
can only read to 500 or 1000 pS/m.
2.1 ASTM Standards:
4.1.1 The EMCEE Model 1152 Meter is available with
D 4306 Practice for Aviation Fuel Sample Containers for
2
expanded ranges but the precision of the extended range meters
Tests Affected by Trace Contamination
has not been determined. If it is necessary to measure conduc-
D 4308 Test Method for Electrical Conductivity of Liquid
2 tivities below 1 pS/m, for example in the case of clay treated
Hydrocarbons by Precision Meter
fuels or refined hydrocarbon solvents, Test Method D 4308
should be used.
1
These test methods are under the jurisdiction of ASTM Committee D02 on
Petroleum Products and Lubricants and are the direct responsibility of Subcommit-
5. Significance and Use
tee D02.J on Aviation Fuels.
In the IP, these test methods are under the jurisdiction of the Standardization 5.1 The ability of a fuel to dissi
...