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BS EN 62788-1-6:2017

BS EN 62788-1-6:2017

$142.49

Measurement procedures for materials used in photovoltaic modules – Encapsulants. Test methods for determining the degree of cure in Ethylene-Vinyl Acetate

Published By Publication Date Number of Pages
BSI 2017 32
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IEC 62788-1-6:2017 defines the terminology, test equipment, test environment, specimen preparation, test procedures, and test report for measuring the degree of cure of Ethylene-Vinyl Acetate (EVA) encapsulation sheet used in photovoltaic (PV) modules. The differential scanning calorimetry (both residual enthalpy and melt/freeze protocols) and gel content methods are included herein. This procedure can be used by material- or module-manufacturers to verify that the cross-linking additive is present and is active. The procedure can also be used to verify the module manufacturing (lamination) process for the purposes of quality- and process-control. The procedure can also be used to assess the uniformity of the EVA formulation within a roll as well as to compare variation of the EVA formulation from roll to roll.

PDF Catalog

PDF Pages PDF Title
2 National foreword
7 English
CONTENTS
9 FOREWORD
11 1 Scope
2 Normative references
12 4 Principle
13 5 DSC secondary method
5.1 Instrument and equipment for the secondary method
5.1.1 General
5.1.2 Electronic balance
5.1.3 Differential scanning calorimeter
5.1.4 Instrument calibration
14 5.2 Specimen preparation for the secondary method
5.2.1 Sampling and storage
5.2.2 Preparation procedures
5.3 Test requirements for the secondary method
5.3.1 Environment requirements
15 5.3.2 Parameter settings (residual enthalpy method)
5.3.3 Parameter settings (melt/freeze method)
5.3.4 Parameter settings (combined enthalpy and melt/freeze method)
16 5.4 Test procedure for the secondary method
5.5 Calculation and expression of the results for the secondary method
5.5.1 Enthalpy method
17 5.5.2 Melt/freeze method
Figures
Figure 1 – Example result for the DSC residual enthalpy method
18 Figure 2 – Location of temperatures and temperature rangesused in the melt/freeze DSC method
19 Figure 3 – Example of the temperature bounds appliedfor an automated software integration algorithm
Table 1 – Summary of the results for the examplemeasurements shown in Figure 2
21 5.6 Uncertainty of measurements for the secondary method
6 The primary method
6.1 Principle for the primary method
Figure 4 – Representation of the measurement profile for an EVA test specimen
22 6.2 Instrument and equipment for the primary method
6.2.1 Electronic balance
6.2.2 Soxhlet extractor
6.2.3 Thimble
6.2.4 Heating apparatus
23 6.2.5 Handling apparatus
6.2.6 Solvent
6.3 Specimen preparation for the primary method
6.3.1 Sampling and storage
6.3.2 Preparation procedures
24 6.4 Test requirements for the primary method – Environment requirements
6.5 Test procedure for the primary method
6.6 Calculation and expression of the results for the primary method
7 Test report
26 Annex A (informative)Limitations of the primary and secondary measurement methods
28 Bibliography

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BS EN 62788-1-6:2017
$142.49