Feem ntau NDIR me me thiab cov teeb me me lub tshuab nqus tsev yog ntsuas rau 5V, AC, ua haujlwm tsis tu ncua. Kev ntsuas lub neej ntawm lub teeb yog txiav txim siab los ntawm kev ntsuas lub teeb loj heev thiab kaw thaum 50 feem pua ntawm cov teeb tsis pom kev.
Feem ntau txhawm rau txuas lub neej ntawm lub teeb, ib qho kev cai Circuit Court yuav raug tsim los hloov los ntawm kev ua haujlwm tas mus li rau kev ua haujlwm. Los ntawm kev hloov lub teeb (hloov nws tawm thiab qhib), lub sij hawm lub teeb nyob rau hauv lub sij hawm piv txwv yog txo, yog li ua rau lub teeb lub neej.
However simply pulsing the lamp without insuring proper design to protect from inrush current can actually cause premature failure. When the filament is cold and has much lower resistance, thermal shock can cause a fracture in the filament. This happens when power is applied and there is a surge of current which causes rapid expansion of the tungsten, along with thermal shock. Over time, the filament becomes thinner and more brittle and eventually experiences premature failure due to in rush current damage.
When designing the lamp power circuit there are a few commonly used methods to prevent damage from inrush current. The first is called simmer voltage. When using simmer voltage, a small amount of power is supplied to the lamp in the off cycle; typically just enough to keep the filament warm and reduce the impact of inrush current.
Qhov thib ob yog siv lub zog ntawm qib nce mus txog thaum lub siab tshaj plaws / qhov zoo tshaj plaws lub teeb tso zis theem, tsis txhob siv lub zog tag nrho ib zaug.
And the third is to add a circuit that prevents the lamp from drawing additional current, or restricts the amount of additional current that can be drawn at start up.
Life hours is a critical factor when selecting an NDIR lamp. Understanding all contributing factors that affect a lamp's life, coupled with proper system design can greatly impact the life of both the lamp and the system it is designed into. For more helpful information on NDIR lamps, visit our Technical Notes page here.
