TEMPERATURE PROGRAMMER Russian patent published in 2009 - IPC G05D23/19 

FIELD: instrument making.

SUBSTANCE: invention relates to measuring instruments and automatic control devices, particularly, to those intended for programmable control over temperature in calorimeters, electric furnaces, and differential thermal analysis devices. Temperature programmer comprises a bridge consisting of resistors R1, R2, R3, R4, power supply, programmable voltage setter, operating amplifier, temperature controller amplifier connected to the point of connection of resistors R3, R4 and incorporating heater arranged at its output. Aforesaid heater has thermal contact with resistor R4 or R1. note here that aforesaid programmable voltage setter incorporates additionally resistor R5 with its one output connected to its first input. Note also that voltage stabiliser makes afore mentioned power supply with its one output connected to the point of connection of bridge resistors R1 and R3, while its second output is connected to the ground together with the voltage setter second output and non-inverting inputs of aforesaid temperature controller and operating amplifier. The non-inverting input of the latter is connected to the point of connection of resistors R1, R2 and with the second output of resistor R5.

EFFECT: simple and more accurate temperature programming.

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