Thermistor temperature characteristic experiment

Experiment 22 Temperature characteristics of the thermistor

【Purpose requirement】

1. Measure the temperature characteristics of NTC thermistor;

2. Understand the temperature characteristics of PTC thermistor;

3. Learn to use graphs to process nonlinear data.

【Experimental Principle】

1. Types and characteristics of thermistor

Thermistors are thermistors made of semiconductor materials. According to the characteristics of their resistivity changing with temperature, they can be roughly divided into three types: (1) NTC (negative temperature coefficient) thermistor; PTC (positive temperature coefficient) thermistor; (3) CTC (critical temperature coefficient) thermistor.

2. Characteristics of NTC thermistor

NTC thermistor is a thermistor with a negative temperature coefficient, that is, its resistance decreases with increasing temperature, its resistance-temperature

The characteristics conform to the law of negative index.

【Experiment content】

1. Observe the temperature characteristics of NTC thermistor.

2. Connect the circuit.

3. Measure the temperature characteristics of NTC thermistor.

4. Data processing.

【Instruments】

Serial number

equipment name

Model / Specification

Unit price (yuan)

Remarks

1

Temperature Sensor

Design experimental device

DH-SJ5

5100

Contains NTC thermistor, PTC thermistor, digital thermometer, constant temperature system, wire, switch, ice water mixture container

2

DC constant voltage and current source

DH-VC1

900

Compatible with experiment 21

3

4 and a half digital multimeter

DY2106

290

The experiment requires two pieces, which can be used in common with other experiments