8
MAINTENANCE
Spectroline UV transilluminators are constructed of high-quality
materials and components. By providing reasonable care and fol-
lowing these instructions, the user can expect a long and useful life
from the transilluminator. Immediately clean all spilled materials
from the transilluminator and wipe dry. If necessary, moisten a cloth
with soap and water and clean the transilluminator. Do not use any
harsh chemical cleaners. Do not attempt to clean the unit while it
is plugged into a power source.
REPLACING THE FILTER ASSEMBLY
After considerable use, the filter on the 254nm or 312nm
transilluminators may solarize and require replacement.
If the UV-blocking cover accessory has been employed, it must be
removed from the brackets. Unscrew both brackets from the filter
assembly. Remove the four screws holding the filter assembly.
Unscrew the ground wire and the bracket above the interlocking
switch. Remove the diffusing screen (see Removal/Replacement of
Diffusing Screen) and set it aside.
Install the new filter assembly by reversing the above procedure.
Reattach the diffusing screen, the bracket covering the switch and
the ground wire. Tighten the four screws on the filter assembly and
reattach the two brackets for the UV-blocking cover.
REPLACING THE UV TUBES
To replace the ultraviolet tube(s), remove the four screws holding
the filter frame to the transilluminator housing. If visually inspecting
lit tubes, wear a Spectroline UVF-80 UV-absorbing face shield and
protective clothing. Check for cracked or malfunctioning tubes.
Replace a suspected malfunctioning tube with a new tube. If the
new tube performs properly, discard the old tube.
NOTE:
Use a clean cloth or wear cotton gloves during servicing.
Contamination may result if the glass section of the UV tubes or the
metal reflector is touched directly. This will reduce the UV output.
After servicing, wipe the tubes clean with a pure solvent (such as
methanol) or mild detergent to eliminate contamination that could
cause damage.
Once all malfunctioning tubes are replaced, lower the filter frame
to its original (horizontal) position. Replace the four screws that hold
the filter frame to the housing.
