| 摘要 |
FIELD: instrumentation.SUBSTANCE: invention relates to instrumentation and can be used in multichannel devices for temperature measurement by means of resistive temperature transducers. A temperature control interface module includes resistive temperature transducer 1, reference resistor 2 and standard resistors 3 and 4 of lower and upper calibration points of the first control channel 5, the common point of which is connected to a common power supply bus, the first group of electronic keys (EK) 6 with three keys - A, B, D, the second EK group 7 with four keys - A, B, C, D, the first stable current generator 8 that is connected between the common power supply bus and combined inputs of keys A, B of the first EK group 6. In addition, the second control channel 5 is introduced, which is represented by resistive temperature transducers 1, reference resistors 2 and standard resistors 3 and 4 of lower and upper calibration points, the common point of which is connected to the common power supply bus, the second stable current generator 9, interface exchange bus 10, controller of interfaces 11, controller of interfaces 12 and in-series connected instrument amplifier 13, the first input of which is connected to a combination point of outputs of keys A, B, C of the second EK group 7, and the second input of which is connected to the output of key D of the second EK group 7, scaling amplifier 14, analogue-to-digital converter 15 and buffer device 16.EFFECT: enlarging functional capabilities of the device and improving measurement accuracy.3 cl, 1 dwg |
