ASTM-D4308 › Historical Revision Information
Standard Test Method for Electrical Conductivity of Liquid Hydrocarbons by Precision Meter
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1.1 This test method covers and applies to the determination of the “rest” electrical conductivity of aviation fuels and other similar low-conductivity hydrocarbon liquids in the range from 0.1 to 2000 pS/m (see 3.2). This test method can be used in the laboratory or in the field.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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. For specific warning statements, see 7.1.1, 7.2, and 8.3.
Significance and Use
The generation and dissipation of electrostatic charge in fuel due to handling depend largely on the ionic species present which may be characterized by the rest or equilibrium electrical conductivity. The time for static charge to dissipate is inversely related to conductivity. This test method can supplement Test Method D2624 which is limited to fuels containing static dissipator additive.
Note 1—For low-conductivity fluids below 1 pS/m in conductivity, an ac measurement technique is preferable to a dc test method for sensing the electrical conductivity of bulk fluid. This dc test method can be used at conductivities from 0.1 to 1 pS/m if precautions are observed in cell cleaning and sample handling. A waiting period of 15 min is required after filling the cell before measuring dc conductivities below 1 pS/m. A single-laboratory program was conducted comparing this test method with ac Test Methods D150.
Aviation fuels; Conductance and conductivity (electrical); Electrostatic charge/discharge; Field testing--petroleum products; Light hydrocarbons; Precision--petroleum analysis; Precision meter method; ICS Number Code 71.080.01 (Organic chemicals in general)
To find similar documents by ASTM Volume:
05.02 (Petroleum Products and Lubricants (II): D3711 - D6122)
To find similar documents by classification:
71.080.01 (Organic chemicals in general)
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1995 R10 EDITION
March 1, 2010