It consists of control panel, desk, equipment kit and 3-phase squirrel-cage asynchronous motor.

1. AC power supply

3-phase variable autotransformer 0-450v

Single-phase variable autotransformer 0-250v

Three AC pointer type voltmeters for input or output switched measurements

functions of over current, short circuit protection and leakage protection provided

2. Fluorescent lamps: 220V@30W, the terminals are connected to the panel. One or lighting and the other for

experiment.

3. Timer/alarm recorder

Function of lab service supervision including lab time set, alarming at expire time, faults history

4. One RMS value AC digital voltmeter: 0~500V measurement with auto judging & ranging, accuracy: class 0.5, 3 and 1/2 -digit display.

5. DGJ-03 Fundamentals of electric

Provides Kirchhoff's law, superposition principle, Norton theorem, two-port network, Reciprocity theorem,

R LC series resonant circuits, RC series/parallel frequency selective network of first-order and second-order

dynamic circuit

6. DGJ-05 components

Capacitors, resistors, diodes, triodes, zener diode, potentiometes and 12V signal lamp, regulable resistors:

0~99999.9Ω/2W.

7. DGJ-04 AC circuits

Provides single-phase, 3-phase load, fluorescent lamp, transformer, mutual inductance and wattmeter.

Six incandescent lamps, capacitors, 30W fluorescent lamp ballast, starter, iron-core transformer, current

sockets etc.

8. DGJ-07-2 AC digital millivoltmeter, power meter and power factor meter

DSP based intelligent meter for measurements of watt, power factor with function of data recording

Voltage/current ranges: 0-450V/0-5A

AC digital millivoltmeter

Measuring range: 0.2mV~600V(RMS value), ranges of it: 200mV, 2V, 20V, 200V, 600V, with the functions of

over-range alarming and turn-off the power automatically,

Frequency range: 10Hz~600kHz

Input impedance: 1MΩ

Lab Exercises:

Basic lab exercises:

1.Application of instruments and calculation of measuring error

2. Instruments measuring error reduction

3. V-I characteristics plotting of linear & nonlinear circuit components

4. Potential & voltage measuring and potential diagram plotting

5. Demonstration of Kirchhoff's law and troubleshooting

6. Demonstration of superposition principle and troubleshooting

7. Equivalent transform between voltage source and current source

8. Demonstration of Thevenin theorem

9. Demonstration of Norton theorem

10. Two-port network

11. Demonstration of Reciprocity theorem

12. Research on controlled sources (VCVS, VCCS, CCVS and CCCS)

13. Observation and measurement of typical electrical signal

14. Response testing of first-order RC circuits

15. Response testing of second-order RC circuits

16. Impedance characteristics measurement of RLC components

17. Characteristics testing of RC series & parallel frequency selective network

18. Research on R LC series resonant circuits

19. AC circuit equivalent parameters measurement

20. Research on the phasor of sinusoidal steady-state AC circuits

21. Mutual inductance

22. Characteristics testing of single-phase iron-core transformer

23. Voltage and current measurement of 3-phase AC circuits

24. Calibration of single-phase wattmeter

25. Measurement of power factor and phase sequence

DC stabilized power

supply

0.0~30V/1A continuous adjustable power supply with short-circuit protection and

auto-recovery function for each circuit

Adjustable constant

current source

0~200mA continuous adjustable constant current source, stepped into 2mA, 20mA and

200mA with the function of output open-circuit or short-circuit protection and 0.1%

adjustment accuracy, load reliability-4and change rate-4.

Analog AC voltmeter

With two calibrate pointer(red, black) , measuring range: 0~500V, stepped into 10V,

30V, 100V, 300V, 500V.

Input impedance: 1MΩ.

Accuracy: 1.0%.

With the function of over-range alarming and turn-off power automatically.

Analog AC ammeter

With two calibrate pointer(red, black) , measuring range: 0~5A, stepped into 0.3A,1A,

3A, 5A.

Accuracy: 1.0%.

With the function of over-range alarming and turn-off power automatically.

DC voltmeter

Measuring range: 0~200V, is stepped into 200mV, 2V, 20V, 200V.

Input impedance: 10MΩ.

Accuracy : 0.5%.

With the function of over-range alarming and turn-off power automatically.

DC millimeter

Measuring range: 0~2000mA, is stepped into 2mA, 20mA, 200mA, 2000mA .

Accuracy : 0.5%.

With the function of over-range alarming and turn-off power automatically.

Single/three-phase

power, power factor

meters

Constructed by microprocessor, high-speed A/D conversion chip and fully

digit-displayed circuits. Intelligent control is obtained by keys and digit display.

The sample signal of measured voltage and current are sent to DSP after A/D

conversion for positive/active power calculation. Measurement of single/three-phase

power with accuracy of grade 0.5 and ranges of voltmeter and ammeters are 450V, 5A.

also, data can be recorded and inquiry. The total power is obtained by sum of P₁+P₂.

RMS value AC digital

millivoltmeter

Accuracy measurement of every kind of complex waveform.

Voltage measurement range: 0.2mV~600V (RMS value), accuracy: ±1%,overlapping in

five ranges 200mV, 2V, 20V, 200V, 600V, controlled by keys, with 3 and 1/2-digit display

and over-range alarming, indication and power cutoff. Frequency measurement range:

10Hz~600kHz, input impedance: 1 MΩ, input capacitance:

Function generator

Frequency range 0.2Hz~2MHz overlapping in seven ranges and frequency adjustment rate

is 0.1~1; output waveform: sine wave, square wave, triangle wave, pulse wave, ramp

wave; output impedance: 50Ω; output signal type: FM/frequency sweep, and types of

sweep: linear and logarithm with rate of 5s~10ms; output amplitude: 20Vp-p (1MΩ),

10Vp-p (50Ω); with output short-circuit protection which bearing ±35V for one

minute; adjustment of degree of symmetry: 20%~80%.

20M two-channel

analog oscilloscope

1. Deflection factor: 5mV/DIV-5V/DIV overlapping in 10 ranges

2. Vertical mode: CH1, CH2, ALT, CHOP, ADD

3 and 1/2 -digit digital

multimeter

1. DC voltage: 200mV/2V/20V/200V/1000V ±(0.5%+3)

2. AC voltage: 2V/20V/200V/750V ±(0.8%+5)

3. DC current:20uA/2mA/200mA/20A ±(1.5%+3)

4. AC current: 2mA/20mA/20A ±(1.5%+5)

5. resistance: 200Ω/2kΩ/20kΩ/200kΩ/2MΩ/20MΩ ±(0.8%+5)

6. conductance: (0.1-100)nS ±(1.0%+30)

7. capacitance: 20nF/200nF/20uF/200uF ±(4.0%+10)

8. frequency: 20kHz ±(1.5%+25) temperature: -40^oC-1000^oC ±(0.75%+3)

9. Special function: diode test, triode test, on/off alarm, low-voltage display, data

hold, self-turning off, functional protection, self-recovery insurance, shakeproof, 10MΩ input impedance, 3 times/s sample rate, 40-400Hz AC frequency response, manual

operation and the maximum display is 1999.