DEVICE MEASURING AND CONTROLLING TEMPERATURE Russian patent published in 2004 - IPC

FIELD: measurement technology.

SUBSTANCE: device includes thermal resistance converter with three-wire communication line, measurement amplifier, current former, zero setting resistor, setting network comprising code setting unit, digital-to-analog converter and first adder connected in series, comparator, noninverting and inverting amplifiers, second adder and key. Analog multiplying input of digital-to-analog converter is connected to first input of second adder and through noninverting amplifier to lead of zero setting resistor. Second input of second adder is connected to output of digital-to-analog converter, output of second adder is connected to additional input of first adder through inverting amplifier and key connected in series, controlling input of key is connected to output of comparator which input is connected to output of first adder.

EFFECT: increased precision of temperature control, expanded functional potential of device.

1 dwg