GB/T 28472.1-2012 Distributor for use in industrial-process measure and control systems—Part 1:General technical specification

GB/T 28472.2-2012 Distributor for use in industrial-process measure and control systems—Part 2:Methods of evaluating the performance

GB/T 4208-2008 Degrees of protection provided by enclosure(IP code) GB/T 9969-2008 General principles for preparation of instructions for use of industrial products GB/T 11020-2005 Flammability of solid non-metallic materials when exposed to flame sources—List of test methods GB/T 13384-2008 General specifications for packing of mechanical and electrical product GB/T 17212-1998 Industrial-process measurement and control—Terms and definitions GB/T 18271.1-2000 Process measurement and control devices—General methods and procedures for evaluating performance—Part 1:General considerations GB/T 18271.2-2000 Process measurement and control devices—General methods and procedures for evaluating performance—Part 2:Tests under reference conditions GB/T 18271.3-2000 Process measurement and control devices—General methods and procedures for evaluating performance—Part 3:Tests for the effects of influence quantities GB/T 2423.4-1993 Basic environmental testing procedures for electric and electronic products—Test Db:Damp heat, cyclic GB/T 2423.4-2008 Environmental testing for electric and electronic products—Part 2:Test method—Test Db:Damp heat,cyclic(12 h+12 h cycle)