Instroduction Advanced beta ray absorption principle of directly measuring the quality of the particulate matter, is not affected by particle composition, density, color and other factors; With low density, low activity, long half-life of C14 source (5700), measurement of stable and do not need special protection, safe and reliable, won't cause radioactive pollution; Big graphic dot-matrix LCD screen, show the working condition of concentration, the concentration of the standard conditions, the historical data record, calibration records, alarm, equipment state information; Chinese interface, the menu structure, easy to operate; Positioning platform machine, paper feed motor adopts photoelectric coupler, has high repeat positioning accuracy, the characteristics of simple structure, the feeding uniformity and reliable; Using mass flow sensor measurement, sampling flow, collection of atmospheric temperature, pressure, it is concluded that under the condition of sampling flow; Sampling and measuring in the same channel, the structure is simple, avoids the reciprocating movement of the filter paper, eliminate the influence of hysterisis error to the measurement result; Process records can store and display recently effective calibration or maintenance process history information; The large capacity storage, can store up to 10 years of historical data. RS232 digital output, can through the data acquisition instrument computer remote communication, realizing remote monitoring; Sample gas flow by flow control valve dynamic control, to ensure a long running flow accuracy; Choose new environmental protection glass fiber filter paper, strength, not easy to break; Using elastic pressure device, mechanical transmission part of the design is simple, reliable, greatly reduces the appearance of cardboard, paper and other mechanical failure; Instruments and low consumption, with heating, pump < 280 w Instrument operation and low failure rate to maintain a very (in addition to the normal replacement of paper tape, once every two months maintenance) Calibration cycle is long, but the calibration checks once a year PM10 and PM2.5 cutter has passed the environmental hygiene and sanitation engineering Chinese academy of preventive medicine research instite.
Instroduction Advanced beta ray absorption principle of directly measuring the quality of the particulate matter, is not affected by particle composition, density, color and other factors; With low density, low activity, long half-life of C14 source (5700), measurement of stable and do not need special protection, safe and reliable, won't cause radioactive pollution; Big graphic dot-matrix LCD screen, show the working condition of concentration, the concentration of the standard conditions, the historical data record, calibration records, alarm, equipment state information; Chinese interface, the menu structure, easy to operate; Positioning platform machine, paper feed motor adopts photoelectric coupler, has high repeat positioning accuracy, the characteristics of simple structure, the feeding uniformity and reliable;
