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Priority to BG9271290ApriorityCriticalpatent/BG51837A1/en
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The apparatus is intended for temperature measurements in automated chromatographs, instruments, and stations used in environmental monitoring. The apparatus provides increased accuracy. The apparatus consists of a bridge circuit, a differential amplifier (5) across the diagonal of the bridge circuit, two multiplexers (8) and (9), and an operational amplifier (10). Three arms of the bridge include resistors (1), (2), and (3), while the fourth arm has numerous platinum resistors (4). Platinum resistors (4) provide positive feedback to the amplifier, since one side of each platinum resistor is connected to the non-inverting input of differential amplifier (5), and the other side is connected to the inputs of the two synchronously controlled multiplexers (8) and (9), which are, either directly or through limiting resistors (11) respectively. The outputs of multiplexers (8) and (9) are connected, respectively, to the inverting input and the output of operational amplifier (10), whose non-inverting input is connected to the mass.<IMAGE>
BG9271290A1990-08-171990-08-17Device for multipoint temperature measurement
BG51837A1
(en)
IONIZING RADIATION MEASURING APPARATUS INCLUDING A CONNECTABLE MEASURING PROBE, AND METHOD OF ADAPTING THE CHARACTERISTICS OF THE PROBE TO THAT OF THE APPARATUS