... instrument of RV-100 series Electromagnetic Flowmeter Converter implement. Low ... high-frequency switching power,range of voltage:85VAC --- 250VAC; DC 24V switching power, ... keyboard,all the functions of far-untouched controlling converter. 1.3 Normal operating conditionsAmbient Temperature Ranges: ... 600,700,800,900,1000,1200,1400,1600,1800,2000,2200,2400,2600,2800,3000; ...