SMPS
PID Controller
Polarity Switch
Control
Output
SSR
Operating Principle
For temperature calibration you require a stable known temperature source. The
certainty of the calibration depends on
1) Stability of the source temperature.
2) Uniformity to which the stable temperature is known.
Designed diagram of ED-90X is given below.
As Shown in above diagram, Aluminum block is heated & cooled by Thermoelectric coolers in
such a way that a cavity in block has radial as well as axial homogeneous temperature. This
temperature is sensed by highly accurate and stable sensor and block temperature is
controlled by a HMI controller.
230 AC
Temperature
Input
HMI
