ASTM E1143-05

Standard Test Method for Determining the Linearity of a Photovoltaic Device Parameter with Respect To a Test Parameter

SIGNIFICANCE AND USE
This test method is used to evaluate the applicability of other ASTM test methods to a photovoltaic device.
The procedure described in this test method is intended to be used to determine the degree of linearity between the short-circuit current of a photovoltaic device and the irradiance level incident on the device. This test method can be used for other device parameters, provided the function passes through the origin.
SCOPE
1.1 This test method determines the degree of linearity of a photovoltaic device parameter with respect to a test parameter, for example, short-circuit current with respect to irradiance.
1.2 The linearity determined by this test method applies only at the time of testing, and implies no past or future performance level.
1.3 This test method applies only to non-concentrator terrestrial photovoltaic devices.
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.

General Information

• Status: Historical
• Publication Date: 31-Mar-2005
• Technical Committee: E44 - Solar, Geothermal and Other Alternative Energy Sources
• Drafting Committee: E44.09 - Photovoltaic Electric Power Conversion

Relations

• Replaces: ASTM E1143-99 - Standard Test Method for Determining the Linearity of a Photovoltaic Device Parameter with Respect To a Test Parameter
• Effective Date: 01-Apr-2005
• Replaced By: ASTM E1143-05(2010) - Standard Test Method for Determining the Linearity of a Photovoltaic Device Parameter with Respect To a Test Parameter
• Effective Date: 01-Jun-2010
• Referred By: ASTM E1125-16(2020) - Standard Test Method for Calibration of Primary Non-Concentrator Terrestrial Photovoltaic Reference Cells Using a Tabular Spectrum
• Effective Date: 01-Apr-2005
• Referred By: ASTM E1362-15(2019) - Standard Test Methods for Calibration of Non-Concentrator Photovoltaic Non-Primary Reference Cells
• Effective Date: 01-Apr-2005

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
Designation:E1143–05
Standard Test Method for
Determining the Linearity of a Photovoltaic Device
1
Parameter with Respect To a Test Parameter
This standard is issued under the fixed designation E1143; 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 3.2.2 test parameter—a characteristic of the test conditions
to which the photovoltaic device is exposed, such as irradiance
1.1 This test method determines the degree of linearity of a
or temperature.
photovoltaic device parameter with respect to a test parameter,
3.3 Symbols:
for example, short-circuit current with respect to irradiance.
Meaning Symbol
1.2 The linearity determined by this test method applies
Test parameter X
only at the time of testing, and implies no past or future
Device parameter Y
performance level.
Number of data pairs taken n
Slope of the linear function m
1.3 This test method applies only to non-concentrator ter-
Fit to the data
restrial photovoltaic devices.
2
Estimated variance of the slope s
1.4 This standard does not purport to address all of the
4. Summary of Test Method
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4.1 This test method requires the measurement of the
priate safety and health practices and determine the applica-
parameters in question at or near the anticipated device
bility of regulatory limitations prior to use.
operating conditions.The number of measurements made must
be sufficient to cover the range of operating conditions ex-
2. Referenced Documents
pected.
2
2.1 ASTM Standards:
4.2 Device electrical parameters shall be measured in ac-
E772 Terminology Relating to Solar Energy Conversion
cordance with Test Methods E948 or Methods E1036, which-
E948 Test Method for Electrical Performance of Photovol-
ever is applicable.
taic Cells Using Reference Cells Under Simulated Sunlight
4.3 A linear function that passes through the origin is fit to
E1036 Test Methods for Electrical Performance of Noncon-
the data, and the deviation of these data from the function is
centrator Terrestrial Photovoltaic Modules and Arrays
used as the criterion for determining linearity.
Using Reference Cells
5. Significance and Use
E1328 Terminology Relating to Photovoltaic Solar Energy
Conversion
5.1 This test method is used to evaluate the applicability of
other ASTM test methods to a photovoltaic device.
3. Terminology
5.2 The procedure described in this test method is intended
3.1 Definitions—For definitions of terms used in this test
to be used to determine the degree of linearity between the
method, see Terminologies E772 and E1328.
short-circuit current of a photovoltaic device and the irradiance
3.2 Definitions of Terms Specific to This Standard:
level incident on the device. This test method can be used for
3.2.1 photovoltaic device parameter—a characteristic of a
other device parameters, provided the function passes through
photovoltaic device, such as short-circuit current or open-
the origin.
circuit voltage.
6. Procedure
6.1 Measure the device parameter for at least five values of
1
This test method is under the jurisdiction of ASTM Committee E44 on Solar,
thetestparameter.Choosethevaluesofthetestparametersuch
Geothermal and OtherAlternative Energy Sources and is the direct responsibility of
Subcommittee E44.09 on Photovoltaic Electric Power Conversion. that they span the expected operating range in approximately
Current edition approved April 1, 2005. Published May 2005. Originally
equal intervals. For determining the linearity of short-circuit
approved in 1987. Last previous edition approved in 1999 as E1143-99. DOI:
current with respect to irradiance, use four equally spaced
10.1520/E1143-05.
2
irradiance intervals over the range of approximately 750 to
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
2
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
1100 W/m .
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
E1143–05
6.1.1 All applicable electrical measurements must be per- 7.3 Device electrical parameters may be considered linear
formed in accordance with Test Methods E948 or Methods with res
...