Coal combined sample equipment has been widely used in coal

coal-fired power plants and other fields

and its performance deviation may lead to coal trade disputes

which affect the safety and economy of boiler combustion. The paper describes the inspection of combined coal preparation equipment with performance deviation

and iuugrates the process of static and dynamic examination of equipment inspection. By adjusting the equipment

the defects of key parts of the equipment were eliminated

particle size and the reduction ratio of technical parameters were redfined. According to the performance test of relevant technical standards

the equipment performance was evaluated through auuracy

system bias and supplemental tests. The equipment meets the requirements of relevant standards.