101
Maintenance and Repair
Cleaning the Stray Light Filter
Cleaning the Stray Light Filter
Cleaning the stray light filter is recommended at one-yearly intervals, or more
frequently when you operate the spectrophotometer in particularly dirty
environment. An indication for a dirty stray light filter is when
• —after exchanging the lamps—the intensity test executed by your
operating software still falls below the specified level,
• one of the stray light tests fails,
• the photometric accuracy test fails.
Removing the Shutter Assembly
1 Turn off the spectrophotometer and disconnect the power cord. Take the
plastic and sheet metal rear covers off, see “Removing and Replacing Covers”
on page 109.
2 Remove any accessory board or MIO board that may be plugged in from the
rear side of the instrument.
3 Remove the upper rear foam block
4 Disconnect the shutter cable from the SPM board. Open the screw that fixes
the shutter assembly to the optical unit and remove the shutter assembly.
Figure 17 Removing the Shutter Assembly
Shutter assembly
Shutter screw
Stray light filter
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