5.3 Replacement of Light Source Lamp
5 - 2
5.3 REPLACEMENT OF LIGHT SOURCE LAMP
5.3.1 Light Source Lamp Replacement Procedure
WARNING
CAUTIONS in replacement of light source lamp
If you touch the D
2
lamp power supply (500 V), you may
incur fatal or serious injury due to an electric shock.
Before proceeding to lamp replacement, make sure that
the power switch of the photometer is turned off and the
power cord is unplugged.
If you touch hot parts of the D
2
lamp or WI lamp, you may
get burnt. After turning the power switch off, always wait
for at least ten minutes until the lamp becomes fully cool.
When installing a new lamp, wear clean gloves so that
your fingerprints will not be left on the lamp-bulb surface.
When handing a new D
2
lamp, use particular care not to
leave your fingerprints on its protruded part.
When you check the lighting of the lamp after replacement,
do not stare into the lamp with the unprotected eye at a
near position. After replacing the light source cover,
check the lighting of the lamp from a distant position.
For lamp replacement, take the following procedure.
(1) Turn the power switch off, and unplug the power cord. Then,
wait for about ten minutes until the lamp becomes fully cool.
Loosen the setscrew P on the side face of the light source
cover, and remove the light source cover.
Fig. 5-1 Light Source Cover
Light
source
cover
