Electronic test equipment
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Back to Electronics Image:Oscilloscope2.jpg
Electronic test equipment (sometimes called 'testgear') is used to create stimulus signals and capture responses from electronic Devices Under Test (DUTs). In this way, the proper operation of the DUT can be proven or faults in the device can be traced and repaired. Use of electronic test equipment is essential to any serious work on electronics sytems.
Practical electronics engineering and assembly requires the use of many different kinds of electronic test equipment ranging from the very simple and inexpensive (such as a test light consisting of just a light bulb and a test lead) to extremely complex and sophisticated such as Automatic Test Equipment.
Generally, more advanced test gear is necessary when developing circuits and systems than is needed when doing production testing or when troubleshooting existing production units in the field.
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Types of test equipment
Basic equipment
Image:Voltmeter.jpg The following items are used for basic measurement of voltages, currents, and components in the circuit under test.
- Voltmeter (Measures voltage)
- Ohmmeter (Measures resistance
- Ammeter, e.g. Galvanometer or Milliameter (Measures current)
- Multimeter e.g., VOM (Volt-Ohm-Milliameter) or DVM (Digital "Volt" Meter) (Measures all of the above)
The following are used for stimulus of the circuit under test:
Image:Digital Multimeter Aka.jpg The following are used to analyze the response of the circuit under test:
- Oscilloscope (Measures all of the above as they change over time)
- Frequency counter (Measures frequency)
Advanced or less commonly used equipment
Meters
- Solenoid voltmeter (Wiggy)
- Clamp meter (current transducer)
- Wheatstone bridge (Precisely measures resistance)
- Capacitance meter (Measures capacitance)
- EMF Meter (Measures Electric and Magnetic Fields)
- Electrometer (Measures charge)
Probes
Analysers
- Logic analyzer (Tests digital circuits)
- Spectrum analyzer (SA) (Measures spectral energy of signals)
- Vector signal analyzer (VSA) (Like the SA but it can also perform many more useful digital demodulation functions)
- Time-domain reflectometer for testing integrity of long cables
- Waveform analyzer (An oscilloscope specialized for television waveforms)
Signal-generating devices
Image:Leader LSG-15 signal generator.jpg
Miscellaneous devices
- Continuity tester
- Network analyzer (used to characterize components or complete networks)
- Test lightvi:Thiết bị thử nghiệm điện tử