Jestli myslis, tuto pasaz, tak to bude jedna z mnoha chyb v prekladu Jak na to?
V anglickem manualu neni o specialnim povrchu zarovek zadna zminka, jen uvadi obchodni znacku:
OSRAM pod touto obchodni znackou ma standardni H4:
s uvedenou nasledujici zivotnosti:
Vysvetlivky k uvedenym zivotnostem B3 a TC primo z OSRAM webovych stranek:
B3 and Tc
Question
What do B3 and Tc mean in connection with the service life of lamps?
Answer
If we consider the service lives of products that are designed to last a certain time we can see that they all have the same or similar failure characteristics.
If we plot the service lives of the individual lamps on special logarithmic graph paper, the graph produced is called a "Weibull distribution curve".
In a stable production process we obtain a straight line for the service life on which we can read off various life values. For its products in the automotive sector OSRAM specifies a B3 value, which indicates the time at which 3% of the tested lamps have failed. OSRAM also specifies the Tc value (characteristic Weibull value), which indicates the time at which 63.2% of the lamps have failed.
It used to be the case that only the average value was specified (the average life), which in this system would correspond to a B50 value (i.e. the time at which 50% of the lamps have failed). By specifying both the B3 value and the Tc value it is possible to get an idea of the spread of the product's service life and hence the quality of the product.
In America B10 is also given. This value can be calculated from the B3 and Tc values.