Method of determining condensate location in an HID lamp

Details Method of determining condensate location in an HID lamp Method of determining condensate location in an HID lamp

1991-05-07

1992-02-04

Wieder, Kenneth A.

Electricity: measuring and testing

Electric lamp or discharge device

Electric lamp

324403, 445 3, G01R 3124

Patent

active

050862766

ABSTRACT:
The present disclosure describes a method for determining the condensate location within an HID lamp. The method involves monitoring current and voltage waveforms during the glow phase of lamp starting. If the voltage drop during the glow phase is low with a corresponding high current, then the volatile component of the lamp fill has condensed on the electrodes during the previous cool down period. If the voltage drop is high and current is low then most of the condensate has localized on the arc tube wall. An automated detection apparatus is used to carry out the measurements to determine condensate location.

REFERENCES:
patent: 4823050 (1989-04-01), English et al.

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