The invention relates to a
conductivity meter online
verification system and method for a steam-
water sampling system of a power
plant, and the
system comprises a water inlet
pipe, a sampling device, a common
conductivity meter and a controller, and the water inlet
pipe can be respectively communicated with the sampling device and the
conductivity meter; the sampling device comprises a measuring
cell, a temperature sensor, a current detection
assembly and an online detection device, the measuring
cell is connected with the water inlet
pipe, the temperature sensor is used for measuring the temperature T of a
water sample in the measuring
cell, the current detection
assembly is used for obtaining detection current I flowing through the
water sample in the measuring cell, and the online detection device is used for detecting the conductivity sigma of the
water sample in the measuring cell; the controller is used for obtaining the temperature T, the detection current I and the conductivity sigma and constructing a standard conductivity sigma standard
database based on the temperature T, the detection current I and the conductivity sigma; and the controller is also used for obtaining the online conductivity sigma (online) and the online standard conductivity sigma (standard) measured by the common conductivity meter, and comparing the online conductivity sigma (online) and the online standard conductivity sigma (standard). According to the
verification system and method, automatic operation is achieved, operation is stable, and the online conductivity meter can be verified effectively and timely.