Standard No.:	JB/T 9300-1999
English Name:	Switch for precise instrument
Chinese Name:	精密仪器用开关
Chinese Classification:	N25    AC/DC electrical instrument recording instrument
Professional Classification:	JB    Professional Standard - Machinery
ICS Classification:	17.220.20 17.220.20    Measurement of electrical and magnetic quantities 17.220.20
Issued by:	国家机械工业局
Issued on:	1999-8-6
Implemented on:	2000-1-1
Status:	valid
Superseding:	ZB N25002-1989
Language:	English
File Format:	PDF
Word Count:	4000 words
Price(USD):	120.0
Delivery:	via email in 1~3 business day

本标准规定了“精密仪器用开关”（简称开关）的技术要求、试验方法、检验规则及包装等。
本标准适用于最高工作电压为1KV，最大工作电流20A的交、直流精密仪器中作为改变示值或量程等所使用的多点旋转式开关。交流用开关使用频率范围为50Hz～100KHZ。