GB/T 22149-2008
Overhead projectors.Methods for measuring performance characteristics (English Version)

Standard No.

GB/T 22149-2008

Language

Chinese, Available in English version

Release Date

2008

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB/T 22149-2008

Scope

This standard specifies the methods for measuring the effective luminous flux, screen illuminance uniformity, picture distortion, maximum effective projection elevation angle and projector table temperature rise of transmissive projectors. This standard applies to all types of transmissive projectors in JB/T 8259.1. Not suitable for reflective projectors and other special purpose projectors.

GB/T 22149-2008 Referenced Document

• ISO 554:1976 Standard atmospheres for conditioning and/or testing; Specifications
• JB/T 6838 Slide Projectors. Determination of temperature rise in the picture area
• JB/T 8259.1 Overhead projectors.Part 1: Film rolls, cores and winders.Dimensions*， 2014-05-06 Update
• JB/T 8259.2 Overhead projectors.Part 2: Transparencies and transparency frames.Dimensions*， 2014-05-06 Update

GB/T 22149-2008 history

• 2008 GB/T 22149-2008 Overhead projectors.Methods for measuring performance characteristics