Abstract：The relevant test standards at home and abroad was analyzed, the types and reasons of measurement error was studied, and based on this, field testing was done, the ultra-low emission of smoke test accuracy was reviewed, the outlet PM concentration of low-low temperature ESP, WFGD and wet ESP were represented scientifically, which can provide technical support for the smoke test standards.

Keywords: smoke; ultra-low emission; coal-fired power plant; error analysis; measurement accuracy