Thermal resistor
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Experts, may I ask for the schematic diagram of thermistor temperature measurement? Thank you
This post was last edited by ゃ① How ゞ on 2017-8-22 at 22:42. Sensors are used to measure the resistance of a medium, and transmitters convert this resistance value into temperature or current signals. For PT100, a=385, which means that at 0 degrees Celsius the resistance is 100 ohms; for every 1 degree Celsius increase in temperature, the resistance increases by 0.385 ohms. Thus, at 110 degrees Celsius, the resistance is 100 + 0.385 × 110 = 142.35 ohms
There are various methods for measuring the resistance value of thermistors. Measuring the resistance value of thermal resistors using a bridge in the resistance method ； The potential method involves using a constant current to measure the voltage across the thermal resistor. The calculation for the 2nd floor should be: 100 + 0.385X110 = 142.35 ohms, but this is just a simple, approximately linear calculation.
You miscalculated, bro – 110°C is 100 + 0.385*10
Two diagrams are provided for reference: 1. Bridge method (three-wire system); 2. Potential method (four-wire system)