105
Maintenance and Repair
Cleaning the Lenses
Figure 19 Cleaning the Source Lens from the Lamp Side
4 Use a canister of compressed oil-free air (like those used to clean
photographic lenses) to further clean the source lens. If you do not have a
compressed air canister, you can use a photographic lens cleaning brush.
5 To replace the Deuterium lamp, see “Exchanging the Deuterium or Tungsten
Lamp” on page 96.
6 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.
Cleaning the Spectrograph Lens
1 Turn off the spectrophotometer and disconnect the power cord.
2 Remove any cuvette holder from the sample compartment.
3 To have better access you may want to take the plastic and metal front covers
off, see “Removing and Replacing Covers” on page 109.
4 Dampen a lint-free, surgical cotton swab with reagent grade isopropanol
(isopropyl alcohol) and gently swab the surface of the spectrograph lens.
Repeat several times with clean swabs and alcohol each time.
Source lens
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