Luzchem SPR-01, Instruction Manual, Page: 7 / 18

7
0
10
20
30
40
50
60
300 400 500 600 700 800
Power (mWm
-2
nm
-1
)
Wavelength, nm
254 nm
Figure 2.3 . Power spectrum for the verification lamp.
The correct positioning of the detector on the verification lamp is illustrated in Figure
2.4. In addition to verification of the wavelength, the verification lamp is useful in
determining the integrity of the optical fiber. Typically the intensity (that is, before
conversion to a power spectrum) should be between and 50 and 150 counts at 254 nm
for an integration time of 1000 ms.
Figure 2.4 . Positioning of the detector head on the verification lamp.
If the counts at 254 nm are significantly less than 50, change the batteries (alkaline
batteries are recommended). If the problem is not resolved by this, it could be an
indication of a ruptured fiber; in this case, contact Luzchem for advice. Lamp usage
for verification purposes normally does not exceed a few minutes, and batteries last
about 12 hours of actual usage. Figure 2.5 shows a representative discharge curve
under continuous operation.