ASTM F150-98
(Test Method)Standard Test Method for Electrical Resistance of Conductive and Static Dissipative Resilient Flooring
Standard Test Method for Electrical Resistance of Conductive and Static Dissipative Resilient Flooring
SCOPE
1.1 This test method covers the determination of electrical conductance or resistance of resilient flooring either in tile or sheet form, for applications such as hospitals, computer rooms, clean rooms, access flooring, munition plants, or any other environment concerning personnel-generated static electricity.
1.2 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:F150–98
Standard Test Method for
Electrical Resistance of Conductive and Static Dissipative
Resilient Flooring
This standard is issued under the fixed designation F 150; 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.
1. Scope 3. Terminology
1.1 This test method covers the determination of electrical 3.1 Definitions:
conductance or resistance of resilient flooring either in tile or 3.1.1 conductive flooring—resilient tile or sheet which,
sheet form, for applications such as hospitals, computer rooms, when tested in accordance with 8.1.1 or 8.2.1 shall have an
clean rooms, access flooring, munition plants, or any other average resistance greater that 25 000 V (2.5 3 10 V) and less
environment concerning personnel-generated static electricity. than 1 000 000 V (1.0 3 10 V). When tested in accordance
1.2 This standard does not purport to address all of the with8.2.2theaveragevalueshallbenolessthan25000 V(2.5
safety concerns, if any, associated with its use. It is the 3 10 V) with no individual measurement’s value less than 10
responsibility of the user of this standard to establish appro- 000 V.
priate safety and health practices and determine the applica- 3.1.2 static dissipative flooring—resilient tile or sheet
bility of regulatory limitations prior to use. which,whentestedinaccordancewith8.1.2or8.2.2shallhave
an average resistance greater that 1 000 000 V (1.0 3 10 V)
2. Referenced Documents 9
andlessthanorequalto1000000000 V(1.0 310 V).When
2.1 ASTM Standards: tested in accordance with 8.2.2 the average value shall be no
D 2240 Test Method for Rubber Property–Durometer Hard-
less than 1 000 000 V (1.0 3 10 V) and less than or equal to
2 9
ness 1 000 000 000 V (1.0 3 10 V).
E 177 Practice for Use of the Terms Precision and Bias in
4. Significance and Use
ASTM Test Methods
E 691 Practice for Conducting an Interlaboratory Study to 4.1 Conductive and static dissipative floors (static control
Determine the Precision of a Test Method flooring) serve as a convenient means of electrically connect-
2.2 Other Standards: ingpersonsandobjectstogethertopreventtheaccumulationof
EOS/ESD-SD7.1 Flooring Materials—Resistive Character- electrostatic charges. A static control floor is specified on the
ization of Materials basis of controlled resistance values. The surface of the floor
NFPA 99-1990 Health Care Facilities provides a path of moderate electrical conductivity between all
Federal Test Method Std. No. 501a, Method 8311— persons and equipment making contact with the floor to
Electrical Conductance prevent the accumulation of dangerous electrostatic charges.
Mono #11 Conductive Flooring for Hospital Operating Staticcontrolfootwearwillneedtobeusedinconjunctionwith
Rooms the floor for the floor to perform effectively with personnel.
4.2 The resistance of some flooring materials change with
age. Floors of such materials should have an initial resistance
ThistestmethodisunderthejurisdictionofASTMCommitteeF-6onResilient
low enough or high enough to permit increase or decrease in
Floor Coverings and is the direct responsibility of Subcommittee F06.20 on Test
resistance with age without exceeding the limits prescribed in
Methods—Products Construction/Materials.
Current edition approved Oct. 10, 1998. Published January 1999. Originally the product specifications (see Federal Test Method No. 501a,
published as F 150-72. Discontinued February 1998 and reinstated as F 150-98.
Method 8311).
Annual Book of ASTM Standards, Vol 09.01.
Annual Book of ASTM Standards, Vol 14.02.
5. Apparatus
Available from the Electrical Overstress/Electrostatic Discharge Association,
Inc., Rome, NY. 5.1 Self-Contained Resistance Meter (such as a megohm
Available from National Fire Protection Association, Batterymarch Park,
meter) or power supplies and current meters in the appropriate
Quincy, MA 02269.
configuration for resistance measurement with 6 10 % accu-
Available from Standardization Documents Order Desk, Bldg. 4, Section D,
racy. For safety all power supplies used herein should be
700 Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
Available from National Bureau of Standards, Dept. of Commerce, Washing-
current limited, usually below 5.0 mA. This apparatus shall be
ton, DC, March 1960.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
F150–98
capableofopencircuitvoltagesof500 610VDCor100 610 100 VDC) and take a reading 5 s after the application of
VDC, or both. Test leads should be isolated from ground. voltage or once the reading has reached equilibrium.
5.2 Electrodes—Either style A or style B electrode may be
NOTE 1—The voltage applied should be determined by the use of the
used, but the same style shall be used together as a set.
floor.The conductive resistance range tested at 500VDC generally should
5.2.1 Style A—Two metal electrodes with terminals for
be used in areas where explosive gases, chemicals, or munitions are used
making connection to the ohmmeter. Each electrode shall
or stored.
weigh 5 lb 6 1 oz (2.27 kg 6 28 g) and shall have a dry, flat
8.1.2 Surface to Ground Test—Attach the positive electrode
circular contact area 2.5 6 0.062 in. (63.5 6 1.58 mm) in
or the positive wire from the megohm meter to the ground
diameter.
connection and place the negative electrode on the surface of
5.2.2 Style B—Twocylindrical5lb 61oz(2.27kg 628g)
the flooring material. The negative electrode should be over 6
metal electrodes shall have a diameter of 2.3 6 0.062 in. (63.5
in. (152.4 mm) from the ground connection and over 6 in.
6 1.58 mm) each having contacts of electrically conductive
(152.4 mm) from any metal ground strip embedded in the
material with a Shore-A(IRHD) durometer hardness of 50–70
adhesive.Applytheprescribedvoltage(either500VDCor100
(Test Method D 2240). The resistance between the electrodes
VDC) and take a reading 5 s after the application of voltage or
shall be less than 1 Kohms when measured at 10 V or less on
once the reading has reached equilibrium.
a metallic surface.
8.2 Installed Testing—Lightly wipe the area to be tested
5.3 Preparation of Electrode Style A—Place a piece of
with a lint-free cloth to remove any foreign material prior to
aluminum or tin foil 0.0005 to 0.0010 in. (0.0127 to 0.0254
placing of the electrodes. The surfaces of the electrodes, prior
mm) thick on a flat, hard, smooth surface. On top of the foil
to placing, should be cleaned with a minimum 70 %
1 1
place a layer of rubber 2 ⁄2 in. (64 mm) in diameter, ⁄4 in. (6.4
isopropanol-water solution using a clean low linting cloth.
mm)thickandhavingaShore-A(IRHD)durometerhardnessof
Allow to dry. Follow the manufacturer’s recommendation as to
50–70 (Test Method D 2440). Place the electrode on top of the
the time after installation prior to testing.
rubber pad, draw the foil up around the rubber layer and
8.2.1 Surface to Surface Test—Place the electrodes 1 in.
electrode. Secure the foil with a rubber band or pressure-
(25.4 mm) in from an edge of the specimen and 36 in. (914.4
sensitive tape. Repeat procedure for second electrode.
mm) apart. Apply the prescribed voltage (either 500 VDC or
100 VDC) and take a reading 5 s after the application of
6. Test Specimen
voltage or once the reading has reached equilibrium.
6.1 Qualification Testing—When mounting specimen, use
8.2.2 Surface to Ground—Place the electrodes 36 in. (914.4
insulative support material ( ⁄4 in. tempered hardboard is
mm) apart and at least 36 in. (914.4 mm) from any gro
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