DEVICE MEASURING PRESSURE Russian patent published in 1997 - IPC

FIELD: measurement technology. SUBSTANCE: power supply source 1 provides with positive voltage signal converter 7 of pickup 10 with bridge sensitive element through current converter 2, primary diode 3 and network composed of fuse 4, ballast and limiting resistors 5 and 6. Measurement of signal from pickup 10 is provided by connection in one point of second input of converter, output of negative voltage of power supply source 1, load resistor 15 and meter 16. Second leads of the latter are tied up in common point with output of converter 2. Spark protection of pickup is ensured thanks to connection of anodes of second diode 11 and stabilizer diode 12 in common point with resistor 13 which is coupled through fuse 14 to second output of positive voltage of power supply source 1. Cathode of second diode 11 is coupled to common point of ballast and limiting resistors 5 and 6 and cathode of stabilizer diode is connected to second input of converter. EFFECT: improved authenticity of pressure measurements. 2 dwg