ASTM F2939-13(2019)
(Specification)Standard Specification for High Voltage Phasing Testers
Standard Specification for High Voltage Phasing Testers
SCOPE
1.1 This specification covers portable, live-line tool-supported two-pole phasing testers to be used on AC electrical systems.
1.2 Two types of phasing testers are provided and are designated as Type I Resistive and Type II Capacitive.
1.3 Two styles of phasing testers are provided and are designated as Style A Numerical and Style B Audible/Visual.
1.4 The use and maintenance of these high voltage phasing testers and any necessary insulated tool handles are beyond the scope of this specification.
1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.6 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.
Note 1: Except where specified, all voltage defined in this specification refers to phase-to-phase voltage in a three-phase system. Phasing Testers covered by this specification may be used in other than three-phase systems, but the applicable phase-to-phase or phase-to-ground (earth) voltages shall be used to determine the operating voltage.
1.7 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:F2939 −13 (Reapproved 2019)
Standard Specification for
High Voltage Phasing Testers
This standard is issued under the fixed designation F2939; 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.
1. Scope 2. Referenced Documents
1.1 This specification covers portable, live-line tool- 2.1 ASTM Standards:
supported two-pole phasing testers to be used onAC electrical F1796 Specification for High Voltage Detectors—Part 1
systems. Capacitive Type to be Used for Voltages Exceeding 600
Volts AC
1.2 Two types of phasing testers are provided and are
2.2 Other Standards:
designated as Type I Resistive and Type II Capacitive.
ANSI C84.1 Electric Power Systems and Equipment—
1.3 Two styles of phasing testers are provided and are
Voltage Ranges
designated as Style A Numerical and Style B Audible/Visual.
3. Terminology
1.4 The use and maintenance of these high voltage phasing
testers and any necessary insulated tool handles are beyond the
3.1 Definitions:
scope of this specification.
3.1.1 clear indication, n—a specific condition that detects
1.5 The values stated in inch-pound units are to be regarded and indicates the presence or absence of the correct voltage, or
phase relationship, or both, between two energized parts.
as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only
3.1.2 contact electrode, n—the bare conductive part of the
and are not considered standard.
conductive element that establishes the electrical connection to
the component to be tested.
1.6 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3.1.3 indicator, n—part of the phasing tester that indicates
responsibility of the user of this standard to establish appro-
the presence or absence of the correct voltage, or phase
priate safety, health, and environmental practices and deter-
relationship, or both, between two energized parts.
mine the applicability of regulatory limitations prior to use.
3.1.4 indication, n—visible, audible, or numeric indication
NOTE 1—Except where specified, all voltage defined in this specifica-
of which clearly indicates the presence of nominal operating
tion refers to phase-to-phase voltage in a three-phase system. Phasing
voltage within the specified voltage range.
Testerscoveredbythisspecificationmaybeusedinotherthanthree-phase
3.1.4.1 Discussion—Noise and light indications shall be
systems, but the applicable phase-to-phase or phase-to-ground (earth)
clearly detectable under the conditions outlined as follows:
voltages shall be used to determine the operating voltage.
(See Specification F1796, sections 10.3.13 and 10.3.14). Ac-
1.7 This international standard was developed in accor-
ceptable Audible Indication – The audible test should be
dance with internationally recognized principles on standard-
performedinanenvironmentwherebackgroundnoisedoesnot
ization established in the Decision on Principles for the
exceed 60 dBA. Acceptable Visual Indication – The Style B
Development of International Standards, Guides and Recom-
visual tests should be conducted in an environment with
mendations issued by the World Trade Organization Technical
ambient light conditions ranging from 0 to 18 000 fc.
Barriers to Trade (TBT) Committee.
1 2
This specification is under the jurisdiction of ASTM Committee F18 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Electrical Protective Equipment for Workers and is the direct responsibility of contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Subcommittee F18.35 on Tools & Equipment. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Aug. 1, 2019. Published August 2019. Originally the ASTM website.
approved in 2013. Last previous edition approved in 2013 as F2939 – 13. DOI: Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
10.1520/F2939-13R19. 4th Floor, New York, NY 10036, http://www.ansi.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F2939−13 (2019)
3.1.5 insertion limit, n—distinctive location to indicate to 5. Classification
the user the physical limit to which the phasing device may be
5.1 Type I Resistive—Two-pole phasing device with inter-
inserted between energized/grounded parts, as specified by the
connect cable(s) used to detect and indicate the correct phase
manufacturer.
relationship of conductors by measuring voltage difference
whose operation is based on the current passing through a
3.1.6 interference field, n—electrical field capable of affect-
ing the indication. It may result from the part to be tested or resistor or other impedance device.
other adjacent parts.
5.2 Type II Capacitive—Two-pole phasing device without
interconnect cable(s) used to detect and indicate the correct
3.1.7 interference ground, n—ground potential capable of
phase relationship of conductors by measuring phase angle
affecting the indication. It may result from the part to be tested
whose operation is based on the current passing through the
or other adjacent parts.
stray capacitance to earth (ground).
3.1.8 phasing tester, n—portable device used to detect and
5.3 Style A, Numerical—The presence of voltage or phase
indicate the presence or absence of the correct voltage, or
relationship is displayed numerically.
phase relationship, or both, between two energized parts at the
same nominal voltage and frequency.
5.4 Style B, Audible/Visual—The presence of voltage or
phase relationship is indicated by an audible sound and light,
3.1.9 response time, n—time delay between sudden change
capable of being heard and seen as defined in Section 10.
of the voltage state on the contact electrode and the associated
clear indication.
6. Ordering Information
3.1.10 status indication, n—the ability by the user to deter-
6.1 Orders for high voltage phasing testers under this
mine that the phasing tester is in its operating position.
specification shall include this ASTM designation and the
3.1.11 test:
following information:
3.1.11.1 acceptance test, n—a test made at the option of the
6.1.1 Type,
purchaser to verify that a product meets design criteria.
6.1.2 Style,
6.1.3 Voltage range(s), and
3.1.11.2 design test, n—a test made on a sample treated as
6.1.4 Catalog number.
representative of an industrial product. These tests will not
generally be repeated in quantity production.
7. Marking and Instructions
3.1.11.3 routine test, n—a test made regularly on production
7.1 Labeling:
material.
7.1.1 Each phasing tester shall be marked clearly with the
3.1.12 testing element, n—built-in or external device, by
name of the manufacturer or supplier, operating voltage range,
means of which the functioning of the phasing tester can be
catalog number, and date code or serial number.
checked by the user.
7.1.2 Instructions for operating the phasing tester shall be
included with each unit.
3.1.13 threshold angle, n—minimum phase angle between
the two parts to be compared which gives a change of signal
8. Specifications
indicating the incorrect presence or absence of the correct
voltage, or phase relationship, or both.
8.1 The manufacturer shall clearly specify the limits of
performance of phasing tester within the instructions as fol-
3.1.14 threshold voltage, n—minimum voltage between the
lows:
two parts to be compared to give a change of signal indicating
8.1.1 Operating voltage range(s),
the presence or absence of the correct voltage, or phase
8.1.2 Operating temperature range,
relationship, or both (not applicable for capacitive phasing
8.1.3 Operating humidity range,
testers).
8.1.4 Storage temperature range,
3.1.15 voltage, nominal design, n—a nominal value consis-
8.1.5 Storage humidity range, and
tent with the latest revision of ANSI C84.1, 2001, assigned to
8.1.6 Precautions or limitations in use.
the circuit or system for the purpose of conveniently designat-
ing its voltage class.
9. Workmanship, Finish, and Appearance
3.1.16 voltage range, n—values stated by the manufacturer
9.1 Workmanship and finish shall be of such quality as to
indicating the minimum and maximum operating voltage in
ensure safe operation of the unit. Appearance shall be the
which the phasing tester will operate.
prerogative of the manufacturer.
4. Significance and Use
10. Testing
4.1 This specification establishes requirements for the de- 10.1 General—Tests shall be performed using a minimum
sign and testing of high voltage phasing set, used in the of two phasing testers that have been completely assembled.
electrical power industry, to determine the presence or absence Tests shall be carried out under the following test conditions:
of the correct voltage or phase relationships, or both, and 10.1.1 Ambient temperature 59 to 95°F (15 to 35°C).
approximate voltage line to line or line to ground. 10.1.2 Relative humidity 45 to 75 %.
F2939−13 (2019)
10.1.3 Unless otherwise specified, tests shall be carried out instructions, a minimum of three times. The test is considered
using a 60 Hz AC power source. passed if the proper indications appear each time.
10.1.4 An acceptable tolerance of 610 % is allowed for all
10.5 Test Methods (Audible/Visual Indication):
required values.
10.5.1 Acceptable Audible Indication—The audible test
10.2 Test Methods (Environmental): should be performed in an environment where background
noise does not exceed 60 dBA.
10.2.1 Temperature Dependence of the Indication—The
phasing tester shall operate correctly in the temperature range
10.5.1.1 The phasing set shall be mounted so that the sound
of the climatic category according to 8.1.2. The numeric or axis is parallel to the ground at least 3 ft off any sound
threshold voltage shall not vary by more than 610 %, with
reflecting surface. The test shall be performed by applying a
respect to the numeric or threshold voltage measured when voltage of 10 % over the threshold voltage to the contact
testedattheminimumandmaximumtemperature.Thephasing
electrode.
tester shall be subjected to the minimum and maximum
10.5.1.2 The sound intensity shall be measured at 2 ft
temperature extremes for 24 h and immediately subjected to a
intervals at 615° off centerline while moving away from the
numeric or threshold voltage test. The numeric or threshold
phasing tester until the following audible thresholds are deter-
voltage is not to deviate more than 610 % from the previously
mined: (1) 77 dBA for detectors with intermittent signals, and
tested and recorded test report when conducted under the
(2) 80 dBA for detectors with continuous signals.
standard atmospheric conditions as stated in 10.1.1.
10.5.1.3 The phasing tester is considered passed if the
10.2.2 Humidity—The phasing tester shall operate correctly
audible thresholds are met at distances consistent with the
in the humidity range of the climatic category according to
maximum voltage rating of the phasing tester and OSHA
8.1.3. The phasing tester is to be exposed to a minimum of
minimumapproachdistances.Theseaudiblethresholdsmaybe
96 % humidity for 24 h. The phasing tester is considered to
reduced by 10 dBAif the phasing set is equipped with a visual
have passed if it meets the same criteria as outlined in 10.2.1.
indication also.
10.5.2 Acceptable Visual Indication—The Style A visual
10.3 Test Methods (Mechanical):
testsshouldbeconductedinanenvironmentwithambientlight
10.3.1 Drop/Impact—The test surface shall be concrete or
conditions ranging from 0 to 18 000 fc.
steel and smooth, hard and unpliable. The height of the fall
10.5.2.1 The test shall be performed by applying a mini-
shall be 3 ft. The unit shall be dropped twice; once in the
mum voltage of 10 % over the threshold voltage to the contact
horizontal position and once in the vertical. The vertical drop
electrode.
shall be made on the contact electrode, if present. It is
10.5.2.2 Three observers shall determine that visual detec-
acceptable if the contact electrode bends, as long as the unit
tion can be made throughout angles of 615° off the detect
continues to operate. The unit shall be considered to have
centerline at distances up to and including 10 ft from the
passedthetestifthereisnosignificantmechanicaldamageand
phasing tester under test.
the unit meets the requirements of 10.5.
10.5.3 Visual Inspection—The phasing tester shall be re-
10.3.2 Durability of Labeling—The labels on the detector
viewed for any defects apparent in its enclosure, contact
shall be scrubbed for 1 min with a towelette soaked in water,
electrode, or visual and audible indicating systems. Labeling
then scrubbed for another minute with towelette soaked in
shall be inspected and any accessories shall also be visually
ethyl alcohol. The test is considered passed if the marking
inspected. If any defects are found, the phasing tester is to be
remains legible, the printing does not smear, and the label
rejected.
remains attached.
10.4 Test Methods (Electrical): 10.6 Test Methods (Operating for Type I, Resistive, only):
10.6.1 Method of Testing:
10.4.1 Battery Life Test—The phasing tester shall be sub-
jected to a voltage or phase angle test at a value that is ≥
10.6.1.1 The phasing tester shall be supported in a non-
threshold voltage and provides a continuous indication for a conductive fixture in a horizontal position. A phasing tester
minimum of 10 min. with a maximum rated voltage of 69 kV and below, it will be
10.4.2 Continuous Duty Rating—The phasing tester shall be positioned a minimum of 3 ft above a conductive floor. No
foreign objects shall be located between the test fixture and the
placed in contact with a high voltage supply lead and subjected
to maximum rated voltage for 5 min. The phasing tester is floor. For phasing testers rated above 69 kV, the height from
floor dimension will be a minimum of 6 ft.
considered to have passed the test if the indication doesn’t
deviate more than 610 % of the initial indication.
10.6.1.2 The high voltage input cable connected to the
electrodes A and B shall be free and clear of all surrounding
10.4.3 Response Time—The test voltage applied shall be the
minimum operating voltage of the phasing tester 610 %. The objects connecting to the detector on an even axis. The
test voltage shall remain ON and the phasing tester shall be interconnectcableofthephasingsetshallalsobefreeandclear
applied and removed five times. The time sequence b
...
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: F2939 − 13 F2939 − 13 (Reapproved 2019)
Standard Specification for
High Voltage Phasing Testers
This standard is issued under the fixed designation F2939; 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.
1. Scope
1.1 This specification covers portable, live-line tool-supported two-pole phasing testers to be used on AC electrical systems.
1.2 Two types of phasing testers are provided and are designated as Type I Resistive and Type II Capacitive.
1.3 Two styles of phasing testers are provided and are designated as Style A Numerical and Style B Audible/Visual.
1.4 The use and maintenance of these high voltage phasing testers and any necessary insulated tool handles are beyond the scope
of this specification.
1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.6 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.
NOTE 1—Except where specified, all voltage defined in this specification refers to phase-to-phase voltage in a three-phase system. Phasing Testers
covered by this specification may be used in other than three-phase systems, but the applicable phase-to-phase or phase-to-ground (earth) voltages shall
be used to determine the operating voltage.
1.7 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:
F1796 Specification for High Voltage Detectors—Part 1 Capacitive Type to be Used for Voltages Exceeding 600 Volts AC
2.2 Other Standards:
ANSI C84.1 Electric Power Systems and Equipment—Voltage Ranges
3. Terminology
3.1 Definitions:
3.1.1 clear indication, n—a specific condition that detects and indicates the presence or absence of the correct voltage, or phase
relationship, or both, between two energized parts.
3.1.2 contact electrode, n—the bare conductive part of the conductive element that establishes the electrical connection to the
component to be tested.
3.1.3 indicator, n—part of the phasing tester that indicates the presence or absence of the correct voltage, or phase relationship,
or both, between two energized parts.
3.1.4 indication, n—visible, audible, or numeric indication of which clearly indicates the presence of nominal operating voltage
within the specified voltage range.
This test method specification is under the jurisdiction of ASTM Committee F18 on Electrical Protective Equipment for Workers and is the direct responsibility of
Subcommittee F18.35 on Tools & Equipment.
Current edition approved Sept. 1, 2013Aug. 1, 2019. Published October 2013August 2019. Originally approved in 2013. Last previous edition approved in 2013 as
F2939 – 13. DOI: 10.1520/F2939-1310.1520/F2939-13R19.
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.
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F2939 − 13 (2019)
3.1.4.1 Discussion—
Noise and light indications shall be clearly detectable under the conditions outlined as follows: (See Specification F1796, sections
10.3.13 and 10.3.14). Acceptable Audible Indication – The audible test should be performed in an environment where background
noise does not exceed 60 dBA. Acceptable Visual Indication – The Style B visual tests should be conducted in an environment
with ambient light conditions ranging from 0 to 18 000 fc.
3.1.5 insertion limit, n—distinctive location to indicate to the user the physical limit to which the phasing device may be inserted
between energized/grounded parts, as specified by the manufacturer.
3.1.6 interference field, n—electrical field capable of affecting the indication. It may result from the part to be tested or other
adjacent parts.
3.1.7 interference ground, n—ground potential capable of affecting the indication. It may result from the part to be tested or
other adjacent parts.
3.1.8 phasing tester, n—portable device used to detect and indicate the presence or absence of the correct voltage, or phase
relationship, or both, between two energized parts at the same nominal voltage and frequency.
3.1.9 response time, n—time delay between sudden change of the voltage state on the contact electrode and the associated clear
indication.
3.1.10 status indication, n—the ability by the user to determine that the phasing tester is in its operating position.
3.1.11 test:
3.1.11.1 acceptance test, n—a test made at the option of the purchaser to verify that a product meets design criteria.
3.1.11.2 design test, n—a test made on a sample treated as representative of an industrial product. These tests will not generally
be repeated in quantity production.
3.1.11.3 routine test, n—a test made regularly on production material.
3.1.12 testing element, n—built-in or external device, by means of which the functioning of the phasing tester can be checked
by the user.
3.1.13 threshold angle, n—minimum phase angle between the two parts to be compared which gives a change of signal
indicating the incorrect presence or absence of the correct voltage, or phase relationship, or both.
3.1.14 threshold voltage, n—minimum voltage between the two parts to be compared to give a change of signal indicating the
presence or absence of the correct voltage, or phase relationship, or both (not applicable for capacitive phasing testers).
3.1.15 voltage, nominal design, n—a nominal value consistent with the latest revision of ANSI C84.1, 2001, assigned to the
circuit or system for the purpose of conveniently designating its voltage class.
3.1.16 voltage range, n—values stated by the manufacturer indicating the minimum and maximum operating voltage in which
the phasing tester will operate.
4. Significance and Use
4.1 This specification establishes requirements for the design and testing of high voltage phasing set, used in the electrical power
industry, to determine the presence or absence of the correct voltage or phase relationships, or both, and approximate voltage line
to line or line to ground.
5. Classification
5.1 Type I Resistive——Resistive—Two-pole phasing device with interconnect cable(s) used to detect and indicate the correct
phase relationship of conductors by measuring voltage difference whose operation is based on the current passing through a resistor
or other impedance device.
5.2 Type II Capacitive—Two-pole phasing device without interconnect cable(s) used to detect and indicate the correct phase
relationship of conductors by measuring phase angle whose operation is based on the current passing through the stray capacitance
to earth (ground).
5.3 Style A, Numerical—The presence of voltage or phase relationship is displayed numerically.
5.4 Style B, Audible/Visual—The presence of voltage or phase relationship is indicated by an audible sound and light, capable
of being heard and seen as defined in Section 10.
6. Ordering Information
6.1 Orders for high voltage phasing testers under this specification shall include this ASTM designation and the following
information:
6.1.1 Type,
F2939 − 13 (2019)
6.1.2 Style,
6.1.3 Voltage range(s), and
6.1.4 Catalog number.
7. Marking and Instructions
7.1 Labeling:
7.1.1 Each phasing tester shall be marked clearly with the name of the manufacturer or supplier, operating voltage range, catalog
number, and date code or serial number.
7.1.2 Instructions for operating the phasing tester shall be included with each unit.
8. Specifications
8.1 The manufacturer shall clearly specify the limits of performance of phasing tester within the instructions as follows:
8.1.1 Operating voltage range(s),
8.1.2 Operating temperature range,
8.1.3 Operating humidity range,
8.1.4 Storage temperature range,
8.1.5 Storage humidity range, and
8.1.6 Precautions or limitations in use.
9. Workmanship, Finish, and Appearance
9.1 Workmanship and finish shall be of such quality as to ensure safe operation of the unit. Appearance shall be the prerogative
of the manufacturer.
10. Testing
10.1 General—Tests shall be performed using a minimum of two phasing testers that have been completely assembled. Tests
shall be carried out under the following test conditions:
10.1.1 Ambient temperature 59 to 95°F (15 to 35°C).
10.1.2 Relative humidity 45 to 75 %.
10.1.3 Unless otherwise specified, tests shall be carried out using a 60 Hz AC power source.
10.1.4 An acceptable tolerance of 610 % is allowed for all required values.
10.2 Test Methods (Environmental):
10.2.1 Temperature Dependence of the Indication—The phasing tester shall operate correctly in the temperature range of the
climatic category according to 8.1.2. The numeric or threshold voltage shall not vary by more than 610 %, with respect to the
numeric or threshold voltage measured when tested at the minimum and maximum temperature. The phasing tester shall be
subjected to the minimum and maximum temperature extremes for 24 h and immediately subjected to a numeric or threshold
voltage test. The numeric or threshold voltage is not to deviate more than 610 % from the previously tested and recorded test
report when conducted under the standard atmospheric conditions as stated in 10.1.1.
10.2.2 Humidity—The phasing tester shall operate correctly in the humidity range of the climatic category according to 8.1.3.
The phasing tester is to be exposed to a minimum of 96 % humidity for 24 h. The phasing tester is considered to have passed if
it meets the same criteria as outlined in 10.2.1.
10.3 Test Methods (Mechanical):
10.3.1 Drop/Impact—The test surface shall be concrete or steel and smooth, hard and unpliable. The height of the fall shall be
3 ft. The unit shall be dropped twice; once in the horizontal position and once in the vertical. The vertical drop shall be made on
the contact electrode, if present. It is acceptable if the contact electrode bends, as long as the unit continues to operate. The unit
shall be considered to have passed the test if there is no significant mechanical damage and the unit meets the requirements of 10.5.
10.3.2 Durability of Labeling—The labels on the detector shall be scrubbed for 1 min with a towelette soaked in water, then
scrubbed for another minute with towelette soaked in ethyl alcohol. The test is considered passed if the marking remains legible,
the printing does not smear, and the label remains attached.
10.4 Test Methods (Electrical):
10.4.1 Battery Life Test—The phasing tester shall be subjected to a voltage or phase angle test at a value that is ≥ threshold
voltage and provides a continuous indication for a minimum of 10 min.
10.4.2 Continuous Duty Rating—The phasing tester shall be placed in contact with a high voltage supply lead and subjected to
maximum rated voltage for 5 min. The phasing tester is considered to have passed the test if the indication doesn’t deviate more
than 610 % of the initial indication.
10.4.3 Response Time—The test voltage applied shall be the minimum operating voltage of the phasing tester 610 %. The test
voltage shall remain ON and the phasing tester shall be applied and removed five times. The time sequence between these periods
should vary and each shall be at least 3 s long in duration. The test is considered passed if all response times are shorter than 3
s.
F2939 − 13 (2019)
10.4.4 Self-Test Function—The self-test function for a phasing tester equipped with this feature, shall be activated per the
instructions, a minimum of three times. The test is considered passed if the proper indications appear each time.
10.5 Test Methods (Audible/Visual Indication):
10.5.1 Acceptable Audible Indication—The audible test should be performed in an environment where background noise does
not exceed 60 dBA.
10.5.1.1 The phasing set shall be mounted so that the sound axis is parallel to the ground at least 3 ft off any sound reflecting
surface. The test shall be performed by applying a voltage of 10 % over the threshold voltage to the contact electrode.
10.5.1.2 The sound intensity shall be measured at 2 ft intervals at 615° off centerline while moving away from the phasing
tester until the following audible thresholds are determined: (1) 77 dBA for detectors with intermittent signals, and (2) 80 dBA
for detectors with continuous signals.
10.5.1.3 The phasing tester is considered passed if the audible thresholds are met at distances consistent with the maximum
voltage rating of the phasing tester and OSHA minimum approach distances. These audible thresholds may be reduced by 10 dBA
if the phasing set is equipped with a visual indication also.
10.5.2 Acceptable Visual Indication—The Style A visual tests should be conducted in an environment with ambient light
conditions ranging from 0 to 18 000 fc.
10.5.2.1 The test shall be performed by applying a minimum voltage of 10 % over the threshold voltage to the contact electrode.
10.5.2.2 Three observers shall determine that visual detection can be made throughout angles of 615° off the detect centerline
at distances up to and including 10 ft from the phasing tester under test.
10.5.3 Visual Inspection—The phasing tester shall be reviewed for any defects apparent in its enclosure, contact electrode, or
visual and audible indicating systems. Labeling shall be inspected and any accessories shall also be visually inspected. If any
defects are found, the ph
...
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