NTC thermistors are widely used in temperature measurement due to its low cost and characteristics that the resistance changes with the temperature. Generally, use a NTC thermistor and a precision resistor in series. The resistance change of NTC thermistor is indicated by voltage change, which can enter into the A/D input port of comparator circuit or SCM. Amplification is not necessary, and the circuit is very simple. Besides proper R value and B value, it should take consideration of measuring...(more)
Continued from last article. It needs to be noted that the value is the parameter of NTC thermistor before the secondary encapsulation by most of the manufacturers. Although the current determined by this parameter wont produce self-thermal, but it affects the selection range of the parameter value. Thats because the max. non self-thermal power is increased after secondary encapsulation. The way to determine the current range by dissipation factor is to determine the accuracy of NTC thermistor f...(more)
Continued from last article. It needs to be noted that the value is the parameter of NTC thermistor before the secondary encapsulation by most of the manufacturers. Although the current determined by this parameter wont produce self-thermal, but it affects the selection range of the parameter value. Thats because the max. non self-thermal power is increased after secondary encapsulation. The way to determine the current range by dissipation factor is to determine the accuracy of NTC thermistor f...(more)
Peltier controller is an electric module, which is designed and produced for driving a thermal electric cooler ( TEC ) to stabilize temperature. Peltier controller has many advantages including compact size, high efficiencyand high reliability. Figure 1 is the physical photo of an actualPeltier controller. Figure 1. The photo of an actual Peltier controller In order to avoid the inferences between the controller and other electronics, Peltier controller is packaged in a 6 sided metal enclosure....(more)
TEC is the abbreviation of thermal electric cooler , which is utilized to cool and heat objects based on Peltier effect. In temperature regulation, TEC has many advantages of high stability, high reliability, no noise, and a simple structure with no moving parts. TEC has been widely used for controlling the temperature of laser system, air conditioner, water heater and computer CPU. However, it still has some shortcomings: low efficiency, low thermal power and high cost. For better use of TEC, P...(more)
NTC thermistor can be used as an electronic circuit component in instrument circuit temperature compensation and thermocouple cold end temperature compensation. When using the self-heating characteristics of NTC thermistor to realize automatic gain control, it can form a RC oscillator, which is used to delay and protect circuit. The resistance of the thermistor is related to the dissipating condition of the environment when the self-heating temperature is far higher than the ambient temperature,...(more)
NTC thermistor can be used as an electronic circuit component in instrument circuit temperature compensation and thermocouple cold end temperature compensation. When using the self-heating characteristics of NTC thermistor to realize automatic gain control, it can form a RC oscillator, which is used to delay and protect circuit. The resistance of the thermistor is related to the dissipating condition of the environment when the self-heating temperature is far higher than the ambient temperature,...(more)
ATW3A314D Peltier controller is an electronic module, which is being under development. It is designed by Analog Technologies, Inc . (ATI) to set and monitor temperature. This Peltier controller features high efficiency (more than 90%), high reliability, high stability and compact size. The range of programmable maximum output current of ATW3A314D Peltier controller is from 0 to 3A and the range of its programmable maximum output voltage is from 0 to VPS. The physical photo of this Peltier contr...(more)
