BS 1685-2008 斜角规量角器(机械和光学).试验方法和要求

标准号：BS 1685-2008
中文标准名称：斜角规量角器(机械和光学).试验方法和要求
英文标准名称：Bevel protractors (mechanical and optical) - Requirements and test methods
标准类型：J42
发布日期：2008/11/30 12:00:00
实施日期：2008/11/30 12:00:00
中国标准分类号：J42
国际标准分类号：17.040.30;53.020.30
引用标准：BS 869;BS EN 12540;BS EN ISO 18265
适用范围：This standard relates to the following types of bevel protractors:a) Mechanical.Type A. With vernier graduated to read to five minutes of arc,and with slow motion device, and acute angle attachment.Type B. With vernier graduated to read to five minutes of arc, butwithout slow motion device or acute angle attachment.Type C. With scale graduated in degrees, without vernier or slowmotion device or acute angle attachment.b) Optical. With an internal circular scale which is graduated indivisions of 10 minutes of arc1) and read against a fixed index lineor vernier by means of an optical magnifying system integral withthe instrument, enabling readings to be taken, by estimation orotherwise, to approximately two minutes of arc.