ASTM D7224-14(2018)
(Test Method)Standard Test Method for Determining Water Separation Characteristics of Kerosine-Type Aviation Turbine Fuels Containing Additives by Portable Separometer
Standard Test Method for Determining Water Separation Characteristics of Kerosine-Type Aviation Turbine Fuels Containing Additives by Portable Separometer
SIGNIFICANCE AND USE
5.1 This test method provides a measurement of the presence of surfactants in aviation turbine fuels. Like previous obsolete Test Methods D2550 and D3602 and current Test Method D3948, this test method can detect trace amounts of refinery treating chemicals in fuel. The test methods can also detect surface active substances added to fuel in the form of additives or picked up by the fuel during handling from point of production to point of use. Some of these substances degrade the ability of filter separators to separate free water from the fuel.
5.2 This test method yields approximately the same (low) MSEP ratings as Test Method D3948 for fuels that contain strong surfactants.
5.2.1 This test method will give approximately the same MSEP ratings for Jet A, Jet A-1, JP-5, JP-7, and JP-8 fuels as Test Method D3948 when testing reference fluids.
5.3 The MSEP ratings obtained by this test method are less affected by weak surfactants than Test Method D3948. Somewhat higher MSEP ratings for Jet A, Jet A-1, JP-5, JP-7, and JP-8 fuels are obtained by this test method than those obtained by Test Method D3948 when additives such as static dissipater additives (SDA) and corrosion inhibitors are present in the fuel. This correlates with the satisfactory performance of filter separators for such fuels, when wet. However, these same additives adversely affect the MSEP ratings obtained by Test Method D3948 by erroneously indicating that such additized fuels would significantly degrade the ability of filter separators to separate free water from the fuel in actual service.
5.4 The Micro-Separometer instrument has an effective measurement range from 50 to 100. Values obtained outside of those limits are undefined and invalid.
Note 1: In the event a value greater than 100 is obtained, there is a good probability that light transmittance was reduced by material, typically water, contained in the fuel that was used to set the 100 reference level. During the coalescing port...
SCOPE
1.1 This test method covers a rapid portable means for field and laboratory use to rate the ability of kerosine-type aviation turbine fuels, both neat and those containing additives, to release entrained or emulsified water when passed through fiberglass coalescing material.
1.1.1 This test method is applicable to kerosine-type aviation turbine fuels including: Jet A and Jet A-1 (as described in Specification D1655); JP-5, JP-7, JP-8, and JP-8+100. (See Section 6.)
1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific warning statements, see 8.2 – 8.5.
1.4 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.
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Designation: D7224 − 14 (Reapproved 2018) An American National Standard
Standard Test Method for
Determining Water Separation Characteristics of Kerosine-
Type Aviation Turbine Fuels Containing Additives by
Portable Separometer
This standard is issued under the fixed designation D7224; 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.
INTRODUCTION
This test method was developed to satisfy three objectives: (1) Develop a test method that would
respond in the same manner as Test Method D3948 to strong surfactants, but not give low
micro-separometer(MSEP)ratingstofuelscontainingweaksurfactants(additives)thatdonotdegrade
the performance of commercial filter separator elements; (2) Use filter media in the coalescer test that
would be representative of the filtration media in commercial filter separator elements; and (3)
Improve the precision of the test method compared to Test Method D3948.
This test method was developed using material that is representative of coalescing materials
currently used in commercial filter separator elements. The fiberglass coalescing material used in Test
Method D3948 was suitable for coalescing filters in use when that test method was developed, but
developments in coalescing elements in the intervening years have resulted in improved materials that
are not affected by weak surfactants. Test Method D3948 yields low results on some additized fuels
that do not affect the performance of filter separators (coalescing filters) in actual service. Since this
test method was developed with material that is representative of the media used in current filter
separators, the results by this test method are more relevant to performance in current filter separators.
1. Scope mine the applicability of regulatory limitations prior to use.
For specific warning statements, see 8.2 – 8.5.
1.1 This test method covers a rapid portable means for field
1.4 This international standard was developed in accor-
and laboratory use to rate the ability of kerosine-type aviation
dance with internationally recognized principles on standard-
turbine fuels, both neat and those containing additives, to
ization established in the Decision on Principles for the
release entrained or emulsified water when passed through
Development of International Standards, Guides and Recom-
fiberglass coalescing material.
mendations issued by the World Trade Organization Technical
1.1.1 This test method is applicable to kerosine-type avia-
Barriers to Trade (TBT) Committee.
tion turbine fuels including: Jet A and Jet A-1 (as described in
Specification D1655); JP-5, JP-7, JP-8, and JP-8+100. (See
2. Referenced Documents
Section 6.) 2
2.1 ASTM Standards:
1.2 The values stated in SI units are to be regarded as
D1655 Specification for Aviation Turbine Fuels
standard. The values given in parentheses after SI units are
D2550 Method of Test for Water Separation Characteristics
provided for information only and are not considered standard.
of Aviation Turbine Fuels (Withdrawn 1989)
D3602 Test Method for Water Separation Characteristics of
1.3 This standard does not purport to address all of the
Aviation Turbine Fuels (Withdrawn 1994)
safety concerns, if any, associated with its use. It is the
D3948 TestMethodforDeterminingWaterSeparationChar-
responsibility of the user of this standard to establish appro-
acteristicsofAviationTurbineFuelsbyPortableSeparom-
priate safety, health, and environmental practices and deter-
eter
1 2
This test method is under the jurisdiction of ASTM Committee D02 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Subcommittee D02.J0.05 on Fuel Cleanliness. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Oct. 1, 2018. Published January 2019. Originally the ASTM website.
approved in 2005. Last previous edition approved in 2014 as D7224 – 14. DOI: The last approved version of this historical standard is referenced on
10.1520/D7224-14R18. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D7224 − 14 (2018)
D4306 Practice for Aviation Fuel Sample Containers for cess chemicals left in the fuel or contaminants introduced
Tests Affected by Trace Contamination during transportation of the fuel.
D7261 TestMethodforDeterminingWaterSeparationChar- 3.2.6 weak surfactant, n—in petroleum fuels, surface active
acteristics of Diesel Fuels by Portable Separometer material, typically certain types of additives such as static
dissipator additive, that does not adversely affect the perfor-
2.2 Military Standards:
mance of filter separator elements in actual service.
MIL-DTL-5624 Turbine Fuel, Aviation Grades JP-4 and
JP-5
3.3 Definitions of Terms Specific to This Standard:
MIL-DTL-25524 Turbine Fuel, Aviation, Thermally Stable
3.3.1 MCell Coalescer, n—referring to a particular coalesc-
(JPTS)
ing filter element specifically designed for this test method.
MIL-DTL-38219 Turbine Fuel, Low Volatility, JP-7
3.4 Abbreviations:
MIL-DTL-83133 Turbine Fuel, Aviation, Kerosene Type,
3.4.1 AOT—aerosol OT (see 8.1).
JP-8 (NATO F-34), NATO F-35, and JP-8+100 (NATO
3.4.2 DSEP—diesel separability.
F-37)
3.4.3 MSEP—micro-separometer.
3. Terminology
3.4.4 SDA—static dissipator additive.
3.1 For definitions of the terms used in this test method that
4. Summary of Test Method
are not shown below, refer toTest Methods D3948 and D7261.
4.1 A water/fuel sample emulsion is created in a syringe
3.2 Definitions:
5 5 using a high-speed mixer. The emulsion is then expelled from
3.2.1 Micro-Separometer rating (MSEP rating), n—in the
the syringe at a programmed rate through a specific fiberglass
aviation fuel industry, a numerical value indicating the ease of
coalescer, the MCell Coalescer, and the effluent is analyzed
separating emulsified water from aviation (jet) fuel by coales-
for uncoalesced water (that is, dispersed water droplets) by a
cence as affected by the presence of surface active materials
light transmission measurement. The Micro-Separometer in-
(also known as surface active agents or surfactants).
strument has an effective range of 50-to-100 scaled to the
3.2.1.1 Discussion—MSEPratings are only valid within the
nearest whole number. A test can be performed in 5 min to
range of 50 to 100, with ratings at the upper end of the range
10 min.
indicating a clean fuel with little or no contamination by
surfactants, which is expected to show good water-separating
5. Significance and Use
properties when passed through a filter-separator (coalescing
5.1 This test method provides a measurement of the pres-
type filter) in actual service.
ence of surfactants in aviation turbine fuels. Like previous
3.2.2 reference fluid, n—in MSEP and DSEP , [diesel sepa-
obsolete Test Methods D2550 and D3602 and current Test
rability] water separability tests, a reference fluid base to
Method D3948, this test method can detect trace amounts of
which a prescribed quantity of a known surface active agent
refinery treating chemicals in fuel. The test methods can also
has been added.
detect surface active substances added to fuel in the form of
3.2.2.1 Discussion—The known surface active agent is typi- additives or picked up by the fuel during handling from point
cally bis-2-ethylhexyl sodium sulfosuccinate, commonly re- of production to point of use. Some of these substances
ferred to as AOT, dissolved in toluene. degrade the ability of filter separators to separate free water
3.2.3 reference fluid base, n—in aviation MSEP water from the fuel.
separability tests, jet fuel that has been cleaned in a prescribed
5.2 This test method yields approximately the same (low)
mannertoremoveallsurface-activecontaminants(agents),and
MSEP ratings as Test Method D3948 for fuels that contain
having a minimum MSEP rating of 97.
strong surfactants.
3.2.4 surfactant, n—in petroleum fuels, surface active ma-
5.2.1 This test method will give approximately the same
terial (or surface active agent) that could disarm (deactivate)
MSEP ratings for Jet A, Jet A-1, JP-5, JP-7, and JP-8 fuels as
filter separator (coalescing) elements so that free water is not
Test Method D3948 when testing reference fluids.
removed from the fuel in actual service.
5.3 The MSEP ratings obtained by this test method are less
affected by weak surfactants than Test Method D3948. Some-
3.2.4.1 Discussion—Technically, surfactants affect the inter-
what higher MSEP ratings for Jet A, Jet A-1, JP-5, JP-7, and
facial tension between water and fuel which affects the
JP-8 fuels are obtained by this test method than those obtained
tendency of water to coalesce into droplets.
by Test Method D3948 when additives such as static dissipater
3.2.5 strongsurfactant,n—inpetroleumfuels,surfaceactive
additives (SDA) and corrosion inhibitors are present in the
material that disarms filter separator elements, allowing water
fuel. This correlates with the satisfactory performance of filter
to pass.
separators for such fuels, when wet. However, these same
3.2.5.1 Discussion—Strong surfactants can be refinery pro-
additives adversely affect the MSEP ratings obtained by Test
Method D3948 by erroneously indicating that such additized
Available online at ASSIST Quick Search, http://quicksearch.dla.mil.
5 6
Atrademark of EMCEE Electronics, Inc., 520 CypressAve.,Venice, FL34285, Aregistered trademark of EMCEE Electronics, Inc., 520 CypressAve., Venice,
www.emcee-electronics.com. FL 34285, www.emcee-electronics.com.
D7224 − 14 (2018)
FIG. 1 Micro-Separometer Mark V Deluxe and Associated Control Panel
power cords for different voltages.
fuels would significantly degrade the ability of filter separators
to separate free water from the fuel in actual service.
7.1.1 Review the Operating Manual of the Micro-
Separometer instrument that is furnished with each unit (and is
5.4 The Micro-Separometer instrument has an effective
also available from the manufacturer’s website) for operating
measurement range from 50 to 100. Values obtained outside of
instructions. The instrument is not field repairable. Also note
those limits are undefined and invalid.
NOTE 1—In the event a value greater than 100 is obtained, there is a that this instrument is designed to perform a number of
good probability that light transmittance was reduced by material,
different functions in addition to this specific test method.
typicallywater,containedinthefuelthatwasusedtosetthe100reference
7.1.2 The Micro-Separometer Mark V Deluxe and Mark X
level.Duringthecoalescingportionofthetest,thecontaminatingmaterial
instruments and associated control panels are shown in Fig. 1
as well as the 50 µL 6 1 µL of distilled water was subsequently removed
and Fig. 2, respectively. The emulsifier is on the right side of
during this portion of the test. Thus, the processed fuel had a higher light
transmittance than the fuel sample used to obtain the 100 reference level
the raised panel and the syringe drive mechanism is on the left
resulting in the final rating measuring in excess of 100.
side. The control panel containing the operating controls is
mounted on the fixed panel in the left side of the case. Table 1
6. Interferences
lists the manual and audio operating characteristics of the
6.1 Any suspended particles, whether solid or water drop-
instrument.
lets or haze, in a fuel sample will interfere with this test
7.1.3 All of the controls are located in a push-button array
method, which utilizes light transmission of a fuel sample after
on the control panel. The push-buttons illuminate when de-
emulsification with water and subsequent coalescence.
pressed thus indicating operational status. A circuit breaker
located on the control panel provides protection for the ac
7. Apparatus
power circuit.
7.1 Micro-Separometer Instrument is used to perform the
7.1.3.1 The Mark X has an LCD display on the control
test. The unit is completely portable and self-contained, ca-
panel that provides information to the operator during the test.
pable of operating on an (optional) internal rechargeable
The information includes test status and an error code that
battery pack or being connected to an ac power source using
defines a malfunction in the Micro-Separometer instrument.
power cords which are available for various voltages. Connec-
7.1.4 The turbidimeter is located under the main control
tion to an ac power source will provide power to the unit and
panel and consists of a well in which the sample vial is placed
effect battery recharge. The power cords, test accessories and
(in a specified orientation), a light source and a photocell.
operators manual can be packed in the cover of the lockable
7.1.5 By depressing the ON push-button, the electronic
case.
circuits are energized. The ON push-button pulses on and off
when the instruments are being operated by an ac source and
NOTE 2—An extensive study was performed to verify that the Mark X
Micro-Separometer instrument gives equivalent results to the Mark V
remains constantly on when the battery (dc) pack is used. The
Deluxe Micro-Separometer instrument. See Research Report RR:D02-
lettered push-buttons will sequentially illuminate indicating
1647.
READY operational status.
NOTE 3—The Mark X has a universal power supply and requires only
onepowercordascomparedtotheMarkVDeluxethatrequiresindividual
NOTE 4—Of the lettered (A-G) pushbuttons on the control panel of the
Mark V Deluxe, only the A pushbutton is applicable to this test method.
Of the lettered (Jet A – Diesel) pushbuttons on the control panel of the
The sole source of supply of the apparatus, the Model 1140 Micro-Separometer
Mark X, only the Jet A pushbutton is applicable to this test method.
Mark V Deluxe and Mark X instruments, known to the committee at this time is
EMCEE Electronics, Inc., 520 Cypress Ave., Venice, FL 34285, www.emcee-
7.1.6 The RESET push-button can be depressed at any time
electronics.com . If you are aware of alternative suppliers, please provide this
to cancel the test in progress and restore the program to the
information to ASTM International Headquarters. Your comments will receive
1 initial start mode. The lettered push-buttons commence to
careful consideration at a meeting of the responsible technical committee, which
sequentially illuminate, thus indicating a READY operational
yo
...
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: D7224 − 14 D7224 − 14 (Reapproved 2018) An American National Standard
Standard Test Method for
Determining Water Separation Characteristics of Kerosine-
Type Aviation Turbine Fuels Containing Additives by
Portable Separometer
This standard is issued under the fixed designation D7224; 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.
INTRODUCTION
This test method was developed to satisfy three objectives: (1) Develop a test method that would
respond in the same manner as Test Method D3948 to strong surfactants, but not give low
micro-separometer (MSEP) ratings to fuels containing weak surfactants (additives) that do not degrade
the performance of commercial filter separator elements; (2) Use filter media in the coalescer test that
would be representative of the filtration media in commercial filter separator elements; and (3)
Improve the precision of the test method compared to Test Method D3948.
This test method was developed using material that is representative of coalescing materials
currently used in commercial filter separator elements. The fiberglass coalescing material used in Test
Method D3948 was suitable for coalescing filters in use when that test method was developed, but
developments in coalescing elements in the intervening years have resulted in improved materials that
are not affected by weak surfactants. Test Method D3948 yields low results on some additized fuels
that do not affect the performance of filter separators (coalescing filters) in actual service. Since this
test method was developed with material that is representative of the media used in current filter
separators, the results by this test method are more relevant to performance in current filter separators.
1. Scope*Scope
1.1 This test method covers a rapid portable means for field and laboratory use to rate the ability of kerosine-type aviation
turbine fuels, both neat and those containing additives, to release entrained or emulsified water when passed through fiberglass
coalescing material.
1.1.1 This test method is applicable to kerosine-type aviation turbine fuels including: Jet A and Jet A-1 (as described in
Specification D1655); JP-5, JP-7, JP-8, and JP-8+100. (See Section 6.)
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.after
SI units are provided for information only and are not considered 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use. For specific warning statements, see 8.2 – 8.5.
1.4 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.
2. Referenced Documents
2.1 ASTM Standards:
D1655 Specification for Aviation Turbine Fuels
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.J0.05 on Fuel Cleanliness.
Current edition approved Dec. 1, 2014Oct. 1, 2018. Published January 2015January 2019. Originally approved in 2005. Last previous edition approved in 20132014 as
D7224 – 13.D7224 – 14. DOI: 10.1520/D7224-14.10.1520/D7224-14R18.
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.
*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
D7224 − 14 (2018)
D2550 Method of Test for Water Separation Characteristics of Aviation Turbine Fuels (Withdrawn 1989)
D3602 Test Method for Water Separation Characteristics of Aviation Turbine Fuels (Withdrawn 1994)
D3948 Test Method for Determining Water Separation Characteristics of Aviation Turbine Fuels by Portable Separometer
D4306 Practice for Aviation Fuel Sample Containers for Tests Affected by Trace Contamination
D7261 Test Method for Determining Water Separation Characteristics of Diesel Fuels by Portable Separometer
2.2 Military Standards:
MIL-DTL-5624 Turbine Fuel, Aviation Grades JP-4, JP-5, and JP-5/JP- 8 STJP-4 and JP-5
MIL-DTL-25524 Turbine Fuel, Aviation, Thermally Stable (JPTS)
MIL-DTL-38219 Turbine Fuels,Fuel, Low Volatility, JP-7
MIL-DTL-83133 Turbine Fuel, Aviation, Kerosene Types, NATO F-34 (JP-8),Type, JP-8 (NATO F-34), NATO F-35, and
JP-8+100 (NATO F-37)
3. Terminology
3.1 For definitions of the terms used in this test method that are not shown below, refer to Test Methods D3948 and D7261.
3.2 Definitions:
5 5
3.2.1 Micro-Separometer rating (MSEP rating), n—in the aviation fuel industry, a numerical value indicating the ease of
separating emulsified water from aviation (jet) fuel by coalescence as affected by the presence of surface active materials (also
known as surface active agents or surfactants).
The last approved version of this historical standard is referenced on www.astm.org.
Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700 Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS. online at ASSIST Quick
Search, http://quicksearch.dla.mil.
A trademark of EMCEE Electronics, Inc., 520 Cypress Ave., Venice, FL 34285, www.emcee-electronics.com.
3.2.1.1 Discussion—
MSEP ratings are only valid within the range of 50 to 100, with ratings at the upper end of the range indicating a clean fuel with
little or no contamination by surfactants, which is expected to show good water-separating properties when passed through a
filter-separator (coalescing type filter) in actual service.
3.2.2 reference fluid, n—in MSEP and DSEP , [diesel separability] water separability tests, a reference fluid base to which a
prescribed quantity of a known surface active agent has been added.
3.2.2.1 Discussion—
The known surface active agent is typically bis-2-ethylhexyl sodium sulfosuccinate, commonly referred to as AOT, dissolved in
toluene.
3.2.3 reference fluid base, n—in aviation MSEP water separability tests, jet fuel that has been cleaned in a prescribed manner
to remove all surface-active contaminants (agents), and having a minimum MSEP rating of 97.
3.2.4 surfactant, n—in petroleum fuels, surface active material (or surface active agent) that could disarm (deactivate) filter
separator (coalescing) elements so that free water is not removed from the fuel in actual service.
3.2.4.1 Discussion—
Technically, surfactants affect the interfacial tension between water and fuel which affects the tendency of water to coalesce into
droplets.
3.2.5 strong surfactant, n—in petroleum fuels, surface active material that disarms filter separator elements, allowing water to
pass.
3.2.5.1 Discussion—
Strong surfactants can be refinery process chemicals left in the fuel or contaminants introduced during transportation of the fuel.
3.2.6 weak surfactant, n—in petroleum fuels, surface active material, typically certain types of additives such as static dissipator
additive, that does not adversely affect the performance of filter separator elements in actual service.
3.3 Definitions of Terms Specific to This Standard:
D7224 − 14 (2018)
3.3.1 MCell Coalescer, n—referring to a particular coalescing filter element specifically designed for this test method.
3.4 Abbreviations:
3.4.1 AOT—aerosol OT (see 8.1).
3.4.2 DSEP—diesel separability.
3.4.3 MSEP—micro-separometer.
3.4.4 SDA—static dissipator additive.
4. Summary of Test Method
4.1 A water/fuel sample emulsion is created in a syringe using a high-speed mixer. The emulsion is then expelled from the
syringe at a programmed rate through a specific fiberglass coalescer, the MCell Coalescer, and the effluent is analyzed for
uncoalesced water (that is, dispersed water droplets) by a light transmission measurement. The Micro-Separometer instrument has
an effective range of 50-to-100 scaled to the nearest whole number. A test can be performed in 5 min 5 min to 10 min.
5. Significance and Use
5.1 This test method provides a measurement of the presence of surfactants in aviation turbine fuels. Like previous obsolete Test
Methods D2550 and D3602 and current Test Method D3948, this test method can detect trace amounts of refinery treating
chemicals in fuel. The test methods can also detect surface active substances added to fuel in the form of additives or picked up
by the fuel during handling from point of production to point of use. Some of these substances degrade the ability of filter
separators to separate free water from the fuel.
5.2 This test method yields approximately the same (low) MSEP ratings as Test Method D3948 for fuels that contain strong
surfactants.
5.2.1 This test method will give approximately the same MSEP ratings for Jet A, Jet A-1, JP-5, JP-7, and JP-8 fuels as Test
Method D3948 when testing reference fluids.
5.3 The MSEP ratings obtained by this test method are less affected by weak surfactants than Test Method D3948. Somewhat
higher MSEP ratings for Jet A, Jet A-1, JP-5, JP-7, and JP-8 fuels are obtained by this test method than those obtained by Test
Method D3948 when additives such as static dissipater additives (SDA) and corrosion inhibitors are present in the fuel. This
correlates with the satisfactory performance of filter separators for such fuels, when wet. However, these same additives adversely
affect the MSEP ratings obtained by Test Method D3948 by erroneously indicating that such additized fuels would significantly
degrade the ability of filter separators to separate free water from the fuel in actual service.
5.4 The Micro-Separometer instrument has an effective measurement range from 50 to 100. Values obtained outside of those
limits are undefined and invalid.
NOTE 1—In the event a value greater than 100 is obtained, there is a good probability that light transmittance was reduced by material, typically water,
contained in the fuel that was used to set the 100 reference level. During the coalescing portion of the test, the contaminating material as well as the 50 μL
6 1 μL of distilled water was subsequently removed during this portion of the test. Thus, the processed fuel had a higher light transmittance than the
fuel sample used to obtain the 100 reference level resulting in the final rating measuring in excess of 100.
6. Interferences
6.1 Any suspended particles, whether solid or water droplets or haze, in a fuel sample will interfere with this test method, which
utilizes light transmission of a fuel sample after emulsification with water and subsequent coalescence.
7. Apparatus
7.1 Micro-Separometer Instrument is used to perform the test. The unit is completely portable and self-contained, capable of
operating on an (optional) internal rechargeable battery pack or being connected to an ac power source using power cords which
are available for various voltages. Connection to an ac power source will provide power to the unit and effect battery recharge.
The power cords, test accessories and operators manual can be packed in the cover of the lockable case.
NOTE 2—An extensive study was performed to verify that the Mark X Micro-Separometer instrument gives equivalent results to the Mark V Deluxe
Micro-Separometer instrument. See Research Report RR:D02-1647.
NOTE 3—The Mark X has a universal power supply and requires only one power cord as compared to the Mark V Deluxe that requires individual power
cords for different voltages.
A registered trademark of EMCEE Electronics, Inc., 520 Cypress Ave., Venice, FL 34285, www.emcee-electronics.com.
The sole source of supply of the apparatus, the Model 1140 Micro-Separometer Mark V Deluxe and Mark X instruments, known to the committee at this time is EMCEE
Electronics, Inc., 520 Cypress Ave., Venice, FL 34285, www.emcee-electronics.com . If you are aware of alternative suppliers, please provide this information to ASTM
International Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
Supporting data have been filed at ASTM International Headquarters and may be obtained by requesting Research Report RR:D02-1647. Contact ASTM Customer
Service at service@astm.org.
D7224 − 14 (2018)
FIG. 1 Micro-Separometer Mark V Deluxe and Associated Control Panel
7.1.1 Review the Operating Manual of the Micro-Separometer instrument that is furnished with each unit (and is also available
from the manufacturer’s website) for operating instructions. The instrument is not field repairable. Also note that this instrument
is designed to perform a number of different functions in addition to this specific test method.
7.1.2 The Micro-Separometer Mark V Deluxe and Mark X instruments and associated control panels are shown in Fig. 1 and
Fig. 2, respectively. The emulsifier is on the right side of the raised panel and the syringe drive mechanism is on the left side. The
control panel containing the operating controls is mounted on the fixed panel in the left side of the case. Table 1 lists the manual
and audio operating characteristics of the instrument.
7.1.3 All of the controls are located in a push-button array on the control panel. The push-buttons illuminate when depressed
thus indicating operational status. A circuit breaker located on the control panel provides protection for the ac power circuit.
7.1.3.1 The Mark X has an LCD display on the control panel that provides information to the operator during the test. The
information includes test status and an error code that defines a malfunction in the Micro-Separometer instrument.
7.1.4 The turbidimeter is located under the main control panel and con
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