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6.5 Replacing and Cleaning the Light Source Lamp
The average life of the lamp is about 1,000 hours. Replace the light source lamp if a photometer gain error has occurred or
the lamp’s cumulative illumination time is near 1,000 hours.
CAUTION
The light source lamp gets very hot. Before cleaning the light source unit or replacing the light source lamp, turn off
the power, wait at least 5 minutes, and then check the lamp has cooled.
1. Pull out the disposal box, and then remove the front bottom
cover.
2. Loosen the thumbscrew as shown in the figure to the right and
remove the lamp unit.
3. Unplug the connector of the light source lamp and remove the
lamp unit.
4. Wipe the light source unit lens using a dry cotton swab.
NOTE: If you clean with alcohol, always wipe the lens using a dry
cotton swab to dry it well.
5. Turn the thumbscrew of the lamp unit to the left, remove the
lamp, and then replace it with a new one.
IMPORTANT
Tighten the thumbscrews securely. Otherwise, the measurement
results may be negatively affected.
NOTE: When you replace the lamp, hold it by its base. Do not touch
the glass surface with bare hands.
Front bottom cover
2
1
3
Lamp unit
Thumb-
screw
Lens
Lamp base
Thumbscrew
IMPORTANT:
Secure so that metal
hooks hold from above
the lamp housing.
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