A precision temperature controller
Michał Lewandowski, Stanisław L. Randzio · Journal of Physics E Scientific Instruments · 1977
A description is given of a fully electronic precision temperature controller. Its construction, properties and operation are described. The temperature setting of the controller is directly calibrated in the temperature range -200 to +500 degrees C using a platinum resistance thermometer. The temperature resolution of the controller amplifier is better than 2*10 -5 degrees C and temperature stability of the controller components is better than 10 -4 degrees C per 1 degrees C change in external temperature. The typical precision realized with the controller is about 10 -4 degrees C. The design of the controller resistance bridge makes the controller a versatile device. It can be used as either a constant-temperature controller, a differential-temperature controller, a temperature programmer with a linearized sensitivity of 1 Omega degrees C -1 over -200 to +500 degrees C or a simplified transfer function analyser of thermal systems.