Odintsov O. Development of diagnostic stand and facilities of increasing of luminescent lamps service life

The research has been conducted and the causes distribution statistics of luminescent lamps (LL) failure has been obtained. The most common case is the burning thround of a cathode in 65% of cases. A mathematical model for dominant defect suggested which discribes the condition providing steady appearance of are discharge. The structure has been stated and principle electric circuit for special starting up devise with optimized starting and operational parameters to light up 90% of LL in cool start mode has bein devised. To reduce the cataphores the power supply mode of luminescent lamps by quasi-direct current is suggested. A trial board to evaluate the electro-physical parameters of the luminescent lamps has been designed which allows: to state the cause of lamp failure, to measure the level of light emission, to define the residual cathode emission capability, and the ability to be used in mass production lamps with a special starting devise. A mathematical model has been improved and 'dot' controlmethod of luminescent lamps light emission has been developed.