Specification for red and green filters used in ophthalmic dichromatic and dissociation tests Ingestion-build-50790

Specification for red and green filters used in ophthalmic dichromatic and dissociation tests Ingestion-build-507901 Scope This British Standard specifies requirements for red and green filters of glass or plastics materials used in ophthalmic tests as follows: a) dichromatic tests for ametropia, and b) dissociating the eyes in various tests of binocular co operation.

Manufacturers of belt drives and pulleys

nor from a significant hazard to life

1 — Information about emission-related confirmed DTC(s)

intended to be connected to public low-voltage distribution systems of between 220 V and 250 V line to neutral at 50 Hz

BS EN ISO 15351 is an International Standard which specifies a thermal conductimetric method after fusion under inert gas for the determination of nitrogen in steel and iron

BS EN 50121‑3‑1:2017+A1:2019 supersedes EN 50121-3-1:2015

BS ISO 4254-9 does not apply to:

BS EN 12094-3 helps in the evaluation of conformity of product by using initial type testing and factory production control method that verifies if the performance declarations represent the true behaviour of the product

1 has been corrected

BS 3988 was first published in 1966 under the authority of the Non-ferrous Metals Industry Standards Committee and at the request of the Aluminium Industry in view of the increasing use of aluminium for electrical conductors of many types

Some text has been deleted from clause 5

Recommendation for the maximum length of a dental explorer was reduced from 178 mm to 173 mm in 4