In a continuity test, which items may be ignited on some launch controllers?

In a continuity test, which items may be ignited on some launch controllers?

• A. Nichrome wire
• B. Flashbulbs
• C. Very low current electric matches
• D. Both Flashbulbs and Very low current electric matches

Answer: (D)

During a continuity test, the controller sends a small amount of electrical energy to check the wiring and circuits. Some ignition devices are designed to respond to that energy level, so they can be ignited by the test. Flashbulbs contain a tiny detonator that flashes when current flows, so they can ignite with the energy from a continuity check. Very low current electric matches are specifically designed to ignite with minimal electrical energy, making them susceptible to ignition during such a test on some controllers. A bare nichrome wire, on the other hand, is simply a heating element and isn’t intended to ignite a pyrotechnic charge from the modest energy in a typical continuity test. So the items that may ignite are the flashbulbs and very low current electric matches.

During a continuity test, the controller sends a small amount of electrical energy to check the wiring and circuits. Some ignition devices are designed to respond to that energy level, so they can be ignited by the test. Flashbulbs contain a tiny detonator that flashes when current flows, so they can ignite with the energy from a continuity check. Very low current electric matches are specifically designed to ignite with minimal electrical energy, making them susceptible to ignition during such a test on some controllers. A bare nichrome wire, on the other hand, is simply a heating element and isn’t intended to ignite a pyrotechnic charge from the modest energy in a typical continuity test. So the items that may ignite are the flashbulbs and very low current electric matches.