The invention relates to an astronautic programmable
thermocouple temperature
transmitter. A circuit part is composed of a power circuit, a programmable amplifying circuit, a programmable cold junction compensation circuit, an operation amplifying circuit and an output protecting circuit, wherein the functions of power filtering,
reverse connection protection, transient
impact protection, and the like, are achieved by the power circuit; a
thermocouple signal is adjusted to be in a suitable
voltage range by the programmable amplifying circuit; the programmable cold junction compensation circuit is used for sensing the temperature of a cold junction of the
thermocouple, converting a temperature
signal of the cold junction into a
voltage signal and compensating the temperature of the cold junction of the thermocouple; output signals of the programmable amplifying circuit and the programmable cold junction compensation circuit are operated and amplified to be 0-5V by the operation amplifying circuit; and the output protecting circuit is used for limiting an output
voltage within a scope of -0.5V to +6.5V and protecting a next-stage
system from being damaged when the circuit is in fault. The astronautic programmable thermocouple temperature
transmitter has the advantages of high intelligent degree, adjustable range, no requirement for hardware debugging, suitability for
batch production and suitability for thermocouples of K type, E type, T type and
tungsten rhenium type.