Temperature measuring device

Abstract

Abstract The measuring device consists of a measuring amplifier (4), to which, apart from the measuring shunts (RM), two reference resistors (R1, R2) are connected via multiplexers (3), and of a control computer (6), which is connected downstream of the measuring amplifier (4) and controls the multiplexer (3) and thus sequentially connects the measuring shunts and reference resistors to the measuring amplifier (4) in each measurement cycle. The voltage drops generated by a constant current source (1) at the resistors are further processed, after amplification in the measuring amplifier (4), in order to determine the measuring temperature in the computer (6), the computer (6) dividing the difference of the voltages of a measuring shunt (RM) and a reference resistors (R1) by the difference of the voltages of two reference resistors (R2 and R1). This measure means that the measurement result is independent of the operational state of the measuring amplifier (4). <IMAGE>

Inventors

• 👤 Karl-Eugen Dipl.-Ing. Aubele

Bibliographic Details