s parts are designed to be compatible
and interchangeable with the OEM parts.
1. Turn off the 486 detector.
2. Unplug the 486 power cord.
3. Allow the old lamp to cool for at
least 15 minutes.
4. Remove the cover of the detector.
5. Remove the safety cover if your
instrument is so equipped.
6. Disconnect the old lamp cable from
the detector.
7. Remove the three lamp adjustment
plate screws.
8. Remove the old lamp. (Caution:
lamp may still be hot to the touch!).
9. Make & record a rough measurement
of the gap between the lamp base &
the lamp adjustment plate.
10. Loosen the locknut on the lamp
height adjustment screw. Remove
the screw.
11. Set the lamp adjustment plate on a
table, so the lamp is pointing up.
Note that the lamp
s aperture is
pointing toward the large cutout in
the perimeter of the lamp adjustment
plate. Remove the three long
shoulder screws & the springs that
are around them. Remove the lamp
from the lamp adjustment plate.
12. Set the new lamp on the lamp
adjustment plate, with the aperture
pointing toward the large cutout in
the perimeter of the lamp adjustment
plate (as noted above).
13. Install & tighten the three shoulder
screws with the springs around them,
through the lamp base & into the
lamp adjustment plate.
14. Install the lamp height adjustment
screw & its locknut. Tighten the
screw until the gap between the lamp
base & the lamp adjustment plate is
what you previously measured &
recorded. Leave the locknut loose
for now.
15. Put the wires in the slot in the lamp
housing and insert the new lamp into
the lamp housing. The cutout in the
perimeter of the lamp adjustment
plate will be pointed towards the
right-front of the 486. (Caution:
When handling the new lamp, take
care not to touch the glass envelope.
Oils from your fingers can create hot
spots affecting lamp performance
and life. If the envelope is
accidently touched, wipe it clean
with methanol using a lint free cloth
and allow to dry thoroughly.)
16. Install the three lamp adjustment
plate hold-down screws. Rotate the
lamp adjustment plate fully
clockwise. Tighten the screws.
17. Connect the lamp cable to the
instrument.
18. Reinstall the safety cover if your
instrument is so equipped.
19. Plug in the 486 power cord. Turn on
the 486.
20. If calibration is successful, go to the
next step. If not, press any key
(which will cause the 486 to display
reference energy) & skip the next
step.
21. Set the wavelength to 230nm. Enter
Diagnostic 19, which will cause the
486 to display reference energy.
22. While monitoring the displayed
reference energy, turn the lamp
height adjustment screw in or out
until maximum reference energy is
displayed.
23. Loosen the three lamp adjustment
plate screws. While monitoring the
displayed reference energy, rotate
the lamp adjustment plate until
maximum reference energy is
displayed; tighten the three screws.
BE CAREFUL: the lamp adjustment
plate began warming up when the
lamp fired, & it can become quite
hot.
24. Repeat the height adjustment; tighten
the locknut.
25. If the 486 previously didn
