Electroacoustics. Sound level meters - Pattern evaluation tests Ingestion-build-63436 and the yellow colour is

and the yellow colour is measured photometrically

Why should you use ISO 4267-2 - Terms employed in the calculation of metered petroleum quantities

they are intended to be determined in accordance with the test methods specified in ISO 20557‑2

are excluded from the scope of BS EN IEC 62828-3

All properties are intended to be determined by the appropriate methods referred to in this document and values obtained shall be presented as laid down in ISO 10350‑1

Electroacoustics. Sound level meters - Pattern evaluation tests Ingestion-build-63436 and the yellow colour is1 Scope This part of IEC 61672 provides details of the tests necessary to verify conformance to all mandatory specifications given in IEC 616721 for time weighting sound level meters, integrating averaging sound level meters, and integrating sound level meters. Pattern evaluation tests apply for each channel of a multi channel sound level meter, as necessary. Tests and test methods are applicable to class 1 and class 2 sound level meters. The aim is