FIELD: instruments. SUBSTANCE: device has voltage source 1, which is connected in series to measuring detector 2 and to primary winding of voltage transformer 3. Inputs of rectifier 4 are connected to secondary winding of transformer 3. Plates of capacitor 5 are connected to outputs of rectifier 4. Power supply circuits of operational amplifier 6 are connected to outputs of rectifier 4. First terminal of first resistor serves as device input, second terminal is connected to inverting input of operational amplifier 6. Second resistor 8 is inserted between inverting input and output of operational amplifier 6. Third resistor 9 is inserted between output of operational amplifier 6 and output of rectifier 4. Resistors 10 and 11 are connected to direct input of operational amplifier 6; their second terminals are connected to rectifier 4. EFFECT: increased functional capabilities. 1 dwg
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