DEVICE FOR CALIBRATING DEVICES MEASURING CONCENTRATION OF SOLID PARTICLES IN GASES Russian patent published in 1995 - IPC

FIELD: measurement technology. SUBSTANCE: solid particles together with a layer of magnetic elements are supplied to the device by sucking off controlled gas by means of pneumatic pump through a tube from gas conduit on the grille. Purified gas passes through flowmeter which output information about pumped gas volume makes input to adder unit. Threshold unit comes into operation, when control point in volume is achieved and sedimented particles weight information from weight measuring unit makes input to recording device. Cleaning grille and magnetic elements is carried out by means of pulse voltage supplied to electromagnetic coil causing boiling of magnetic elements, solid particles separation and their carrying away into gas conduit due to pressure gradient taking place. EFFECT: enhanced accuracy of calibration. 3 cl, 2 dwg