Care, maintenance, lamp change
SPECORD
®
Changing lamps
4. Remove the new deuterium lamp from its packaging and insert it in the lamp holder
taking care that the locating pin of the lamp holder fits into groove (2) of the lamp
base.
5. Screw down the deuterium lamp by means of both knurled screws (1).
Reconnect the lamp connector (4).
6. Finally, reattach the top part of the protective cover of the lamp acc. to Fig. 8-2 or
Fine alignment of deuterium lamp of SPECORD
®
200 / 205 / 210
Fine alignment on the SPECORD
®
250 by the user is not planned!
On this device, the premonochromator is mounted in place of the toric illuminating
mirror. The premonochromator operates synchronously with the main monochromator.
Improper attempts of alignment may result in severe alignment faults!
If the energy of the deuterium lamp should be insufficient even after lamp
replacement, contact our Technical Service!
Despite stringent manufacturing tolerances of the deuterium lamps, it may be necessary
to realign the lamp after lamp change to ensure that maximum intensity of the lamp is
incident on the entrance slit of the monochromator. For this purpose, you can slightly
move the illuminating mirror by means of setscrew
(
Fig. 8-3, 7).
Caution!
Do not remove the protective cover of the halogen lamp during the aligment! The thus
produced stray light will result in alignment errors!
1. Switch the SPECORD
®
on and initialize it. To this end, start WinASPECT
®
and
activate the following menu command:
Measurement / Initialize Device
.
2. Set up a parameter record containing the following parameters:
Wavelength 230
nm
Integration time
0.5 s
Display Energy
Cycle Automatic,
200x
3. Start the measurement with the sample compartment kept closed. Keep the flap of
the lamp compartment open.
4. Sensitively turn the setscrew
(11)
in both directions until the detected energy
reaches its maximum.
5. This adjustment also influences the alignment of the deuterium lamp. However, the
variation is comparatively small and normally negligible.
6. Finally, close the flap of the lamp compartment.
Note
Please note that the deuterium lamp needs a warm-up of one hour after ignition to
reach full thermal stability.
Page 36
SPECORD
®
200/205/210/250 User's Manual – Edition 04/2005
Analytik Jena AG
