Measurement procedures for materials used in photovoltaic modules - General tests. Moisture permeation testing of polymeric materials1 Scope This document provides methods for measuring the steady state water vapour transmission rate (WVTR), water vapour permeability (P), diffusivity (D), solubility (S), and moisture breakthrough time (10) (defined as the time to reach 10 % of the steady state WVTR) for polymeric materials such as encapsulants, edge seals, frontsheets and backsheets. These measurements can be made at selected temperatures and humidity levels as deemed appropriate

BS 4651-2 guides you with the procedure and expression of results

The scope excludes equipment intended for use in schools

and post-operational activities

It does not apply to pairs of cylindrical gears connecting non-parallel axes known as crossed helical gears

With or without integral side panels and fanlights

Clause 7 is applicable to the joints to be used in GRP UP piping systems to be used for the conveyance of water

ISO 15186-3 is the third part of the multiple series that specifies a sound intensity method to determine the sound reduction index and the element normalized level difference of building elements at low frequencies

It has been validated for CO concentrations with sampling periods of 30 min in the range of 0 mg/m3 to 400 mg/m3 for large combustion plants and 0 mg/m3 to 740 mg/m3 for waste and co-incineration

main contractors

shock and vibration data

Standard test methods for specific applications

Additional aspects of environmental impact are addressed in BS EN ISO 14971