Liquid pumps and pumps units. Noise test code. Grades 2 and 3 of accuracy has-digital and various fluids

and various fluids

and for solid insulation in general

but is principally developed for the gases listed in ISO 13571

The test equipment and preparation for the test on the specimen mounted on the Tilt and Turn

Liquid pumps and pumps units. Noise test code. Grades 2 and 3 of accuracy has-digital and various fluids1 Scope This document specifies all the information necessary to carry out efficiently and under standardized conditions the determination, declaration, and verification of the airborne noise emission of liquid pumps or pump units (see 4. 1). It specifies the noise measurement methods and the operating and mounting conditions that shall be used for the test. Noise emission characteristics include emission sound pressure levels at specified positions