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ASTM E 927 Document Information:
Title
Standard Specification for Solar Simulation for Photovoltaic Testing
ASTM International
Publication Date:
Apr 1, 2005
Scope:
This specification provides means for classifying solar simulators
intended for indoor testing of
photovoltaic devices (solar cells or modules), according to their
spectral match to a reference
spectral irradiance, non-uniformity of spatial irradiance, and
temporal instability of irradiance.
Testing of photovoltaic devices may require the use of solar
simulators. Test Methods that require
specific classification of simulators as defined in this specification
include Test Methods E 948,
E 1036, and E 1362.
This standard is applicable to both pulsed and steady state simulators
and includes recommended
test requirements used for classifying such simulators.
A solar simulator usually consists of three major components: (1)
light source(s) and associated
power supply; (2) any optics and filters required to modify the output
beam to meet the
classification requirements in Section 4; and (3) the necessary
controls to operate the simulator,
adjust irradiance, etc.
A light source that does not meet all of the defined requirements for
classification presented in
this document may not be referred to as a solar simulator.
Spectral irradiance classifications are provided for Air Mass 1.5
direct and global (as defined in
Tables G 173), or Air Mass 0 (AM0, as defined in Standard E 490).
The classification of a solar simulator is based on the size of the
test plane; simulators with
smaller test plane areas have tighter specifications for
non-uniformity of spatial irradiance.
The data acquisition system may affect the ability to synchronize
electrical measurements with
variations in irradiance and therefore may be included in this
specification. In all cases, the
manufacturer must specify with the temporal instability
classification: (1) how the classification
was determined; and (2) the conditions under which the classification
was determined.
The classification of a solar simulator does not provide any
information about electrical
measurement errors that are related to photovoltaic performance
measurements obtained with a
classified solar simulator. Such errors are dependent on the actual
instrumentation and procedures
used.
The following precautionary caveat pertains only to the hazards
portion, Section 6, of this
specification. 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 requirements
prior to use.
Keywords:
- photovoltaic
- solar simulation
- solar
- testing
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