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Thermal cutoff: Difference between revisions
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'''Thermal cutoff switches''' are common in all Tektronix oscilloscopes | '''Thermal cutoff switches''' are common in all Tektronix oscilloscopes | ||
starting in the mid-1950s. If the chassis gets above a certain | starting in the mid-1950s. If the chassis gets above a certain | ||
temperature, typically about 128 | temperature, typically about 53 − 56 °C (128 − 133°F), the switch | ||
opens. Typically this interrupts the mains power coming into the | opens. Typically this interrupts the mains power coming into the | ||
scope and the scope will cool down. Thermal cutoff switches used in | scope and the scope will cool down. | ||
Thermal cutoff switches used in | |||
Tek scopes are self-resetting. After the scope cools down sufficiently, | Tek scopes are self-resetting. After the scope cools down sufficiently, | ||
the thermal switch will close, allowing power into the instrument. | the thermal switch will close, allowing power into the instrument. | ||