Care, maintenance, lamp change
SPECORD
®
Changing lamps
8.3 Changing
lamps
8.3.1 Note on the service life of lamps
The service life of lamps is:
•
Halogen lamp:
> 500 h (at 5.0 V operating voltage)
•
Deuterium lamp: > 1000 h
The service life of the lamps is reduced, if the SPECORD
®
is frequently switched on and
off. This particularly applies to the deuterium lamp, because of the relatively high ignition
voltage required.
The following rule applies as criterion for the service life of the deuterium lamp:
With one daily ON/OFF switching operation, its radiation intensity is allowed to decrease
to 50% after 1000 hours.
The deuterium lamp must be changed, if its heating coil has burnt out, its energy is
insufficient or the operating hours counter indicates 2000 h.
8.3.2 Opening the flap of the lamp compartment
The flap of the lamp compartment (front left corner of device cover) is to be opened to
check the operating hours of the deuterium lamp, change the lamps or change the
desiccator.
Opening the flap
1. Switch the SPECORD
®
off and allow the lamps to cool down for at least five
minutes.
2. Release the lock
(
2
)
of the flap of the lamp compartment by folding the lock
frontward so it sticks out from the SPECORD
®
approximately vertically.
3. Remove the flap of the lamp compartment by lifting it from below by 1 to 2 mm and
then pulling it off to the left.
1
Flap of lamp
compartment
2
Lock
Fig. 8-1
Opening the flap of the lamp compartment
Page 32
SPECORD
®
200/205/210/250 User's Manual – Edition 04/2005
Analytik Jena AG
