Page 4 - Fiber Light EN

Lifetime and Cyclic operation
The guaranteed continuous operating life of a FiberLight deuterium lamp is more than 1000 hours. As the lamp
is an Electrodeless Discharge Lamp (EDL) with high frequency excitation, it can be switched ON and OFF on demand and can be operated in cycles. The cyclic lamp operation results in an extended service life of up to three years. As an EDL, the number of ignitions does not reduce lifetime. In addition, pulse-to-pulse repeatability is extremely consistent to within 0.1%.
Instant ON and Instant Stability
FiberLight EDL is the only deuterium lamp that can be switched instantly ON and instantly deliver a stable light output. This feature makes it unique among UV light sources. FiberLight is therefore the ideal light source
in analytical instruments for pollution monitoring, where light absorption is measured for only a few seconds
and repeated after long intervals. In such monitoring, FiberLight is switched ON only for the short measurement time, while it is OFF for most of the time. Nevertheless, measurement consistency is extremely good because of its pulse-to-pulse repeatability.
Application Example
To measure nitrate content in waste water, FiberLight is switched ON for 2 seconds to measure the nitrate light absorption, and the measurement is repeated every 60 seconds. Measurement consistency is extremely good and under these operating conditions, lamp lifetime can be extended up to 3 years.
FiberLight DTM 6/17 with collimated beam
FiberLight Lamp Life Characteristics
Relative Intensity (%)
120%
100%
80%
60%
40%
20%
0%
Typical lifetime characteristics of FiberLight DTM 6/10 measured at 250 nm
0 200 400 600 800 1000 1200 Operating Time (h)
Cyclic Operation
Cyclic operation at 230 nm / measuring time: 18 sec; off = 10 sec
Light Intensity 40200
35200
30200
25200 20200 15200 10200 5200 200
0
40
20 60 100 140 180 220 260 300 340 380
80 120 160 200 240 280 320 360
Time (seconds)