7.4 Avionics Test Equipment Flashcards
What is built-in test equipment (BITE) in avionics systems?
BITE is equipment that can perform tests on avionics systems, but it may not be able to self-test and can indicate a system is serviceable when it is not.
What is power measurement in an electric circuit?
Power is the product of voltage and current in an electric circuit.
What is a dynamometer movement?
A dynamometer movement is a special meter movement designed for power measurement, using a moving coil and a stationary coil to measure current and voltage.
How does a wattmeter measure power?
A wattmeter measures power by accounting for both voltage and current, and is rated in volts and amperes.
Why is frequency measurement important in AC circuits?
Frequency measurement is crucial for applications in AC power systems that are designed to operate efficiently at a specific frequency.
What is a resonant frequency meter?
A resonant frequency meter uses a tank circuit of inductor and capacitor to indicate maximum voltage amplitude and show resonant frequency.
What is the function of a frequency counter?
A frequency counter uses a digital counting technique to determine the frequency of an unknown signal by counting pulses over a set time.
What is an oscilloscope used for?
An oscilloscope displays time-related voltage waveforms and can also measure frequency and voltage.
How does the time base circuit in an oscilloscope work?
The time base circuit supplies a voltage that varies linearly with time to the horizontal deflecting plates, allowing the display of signal waveforms.
What is a pitot/static system test set?
A pitot/static test set simulates altitude, vertical speed, and airspeed for onboard aircraft instruments and ensures no leaks in the system.
What are the two types of leak checks for pitot/static systems?
The two types of leak checks are: 1) a check to ensure correct operation, and 2) a leak test to verify that the system is not losing pressure.
What is the purpose of a low-range leak check?
The low-range leak check verifies system integrity after disconnection of pitot or static lines and identifies any potential leaks.
What is the function of air data test sets?
Air data test sets perform high-range leak checks and calibrate air-data instruments and systems, including testing ATC transponder functions.
