AReS

PART10Characteristic Circuit of Electric Element

Experiment 4 :Experiment for Temperature Control Switch Circuit

Experiment Process

1. Using Block b of M10 board, make a connection as in fig.10-4.

2. Make the output power of DC power supplier as 5V.

3. Supply AC 9V to lamp 1 and lamp 2 from AC power supplier.

4. Turn VR2 and turn off lamp 1 and lamp 2. Record how SCR operates here.

5. Approach the heated iron to the thermistor and record the state of lamp and that of SCR.

6. Detach the heated iron from the thermistor and record the state of lamp and that of SCR after several seconds.

tab1

Experiment 10-4.1

1.Connection(Block b of M10)

1.Circuit Connection

Connect the terminal to which VR2-SW2 of Block b is connected and the terminal connected to SCR gate with yellow line.

Connect the terminal to which R5-R6 of Block b is connected and the terminal connected to SCR cathode with yellow line.

2.Power Connection

DC Power Connection

Connect between +5V terminal of Fixed Power on the left of M10 board and V+ terminal of Block b with red line, and between GND terminal and the earthing terminal with black line.

AC Power Connection

Connect between V1 terminal of Variable Power on the left of M10 board and the right terminal of D2 of Block b with red line, and between V2 terminal and the right terminal of D3 of Block b with red line. Connect between COM terminal and 0 terminal of Block b with black line.

2.Wiring Diagram

flash

3.Measurement

1Choose variable power at left menu of Touch LCD panel and set up at 3 Phase AC with button_arrow for AC Voltage to become 9V.
Click on , and supply the output of AC 9V to the circuit.

Turn on the SW2.

Turn VR2 and turn off lamp 1 and lamp 2. Record how SCR operates here in the relevant column of table 10-4.

Approach the heated iron to the thermistor and record the state of lamp and that of SCR in the relevant column of table 10-4.

Detach the heated iron from the thermistor and record the state of lamp and that of SCR after several seconds in the relevant column of table 10-4.
2After the measurement, choose variable power at the left menu of Touch LCD panel and click on red to cut off the power supply.

Experiment Result Report

result
Title	Temperature Control Circuit	Date
Department		Id Number		Name

1. Experiment Result Table

Table 10-3

result_table
	Measured Resistance Value of Thermistor
When thermistor is at room temperature
When thermistor is held by fingers
When electric iron is approached to the thermistor
When electric iron is detached from the thermistor

Table 10-4

result_table
	Lamp State	SCR State
State of SCR when the lamp is turned off by turning VR2	OFF
When electric iron is approached to the thermistor
When electric iron is detached from the thermistor