Apparatus and methods for making capacitive measurements of...

Electricity: measuring and testing – Electric lamp or discharge device – Vacuum tube

Reexamination Certificate

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C324S409000, C315S135000

Reexamination Certificate

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07368916

ABSTRACT:
Apparatus and methods for measuring cathode fall in fluorescent lamps are disclosed. Together with measurements of cathode temperature, such measurements of cathode fall may inform a determination of cathode heater voltage as a function of discharge current (i.e., a cathode-heating-profile) that avoids both sputtering and excess-evaporation.

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