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Maintenance and Repair
Cleaning the Stray Light Filter
Cleaning the Stray Light Filter
1 Dampen a lint-free, surgical cotton swab with reagent grade isopropanol
(isopropyl alcohol) and gently swab the surface of the stray light filter. Repeat
several times with clean swabs and alcohol each time.
2 Use a canister of compressed oil-free air (like those used to clean
photographic lenses) to further clean the stray light filter. If you do not have a
compressed air canister, you can use a photographic lens cleaning brush.
Replacing the Shutter Assembly
1 Position the shutter assembly above the source lens and fix the screw that
holds it at the optical unit, see Figure 39. Connect the shutter cable to the SPM
board.
2 Replace the upper rear and upper front foam blocks.
3 If available, replace any accessory board or MIO board (plugged in from the
rear side of the instrument).
4 Replace the plastic and sheet metal rear covers. Push the plastic rear cover
down so that it locates on both sides, see “Removing and Replacing Covers”
on page 109.
5 Reconnect line power and turn on the instrument. Check that the
spectrophotometer passes its self-test, this means that the green light on the
front panel comes on and that you can do a blank measurement from your
software.
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