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571: Difference between revisions
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Details can be seen in the photographs below. | Details can be seen in the photographs below. | ||
Because electronic component testing sometimes involves exposing components | Because electronic component testing sometimes involves exposing components to hazardous voltages and operating conditions, | ||
to hazardous voltages and operating conditions, | at certain settings the 571 will refuse to start a measurement cycle until the user lowers the built-in hinged plastic shield over the socket area. | ||
at certain settings the 571 will refuse to start a measurement cycle | This is to protect the user from both high voltage and high-velocity flying debris in the event of a catastrophic component failure during a test run. | ||
until the user lowers the built-in hinged plastic shield over the socket area. | The shield is made of a thick high-impact plastic, and the 571 has an internal microswitch so its firmware knows if the shield is in the up or down position. | ||
This is to protect the user from both high voltage and high-velocity flying debris | |||
in the event of a catastrophic component failure during a test run. | |||
The shield is made of a thick high-impact plastic, | |||
and the 571 has an internal microswitch so its firmware knows if the shield is in the up or down position. | |||
{{BeginSpecs}} | {{BeginSpecs}} | ||
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==Internals== | ==Internals== | ||
The Tektronix 571 is a computer-based instrument. | The Tektronix 571 is a computer-based instrument. | ||
Software running in an [ | Software running in an [[Intel 8032]] microcontroller performs the I-V curve measurements by sending commands to programmable base and collector power supplies, | ||
by sending commands to programmable base and collector power supplies, | |||
and reading the digitized that results. | and reading the digitized that results. | ||
Software provides the user interface, reading the buttons and generating the displayed bitmap. | Software provides the user interface, reading the buttons and generating the displayed bitmap. | ||