ETC Source 4WRD II, Инструкция по установке и эксплуатации

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22 Source 4WRD II Installation and User Manual
Clean 5° and 10° Polymer Lenses
To quickly clean the lenses, remove dust with a blast of oil-free air. If this
is not sufficient, follow these steps.
CAUTION: Handle polymer lenses by their edges only. Never
rub anything dry on a polymer lens.
1. Remove the beam focus knob at the bottom of the barrel. Remove
the lens tube from the barrel.
2. Use a Phillips screwdriver to remove the brackets that hold the lens
in place. Remove the lens from the tube.
3. Dip the lens in a clean isopropyl alcohol/water mixture (9 parts
water to 1 part isopropyl alcohol).
4. Use a soft moistened nylon bristle brush to wash the smooth side
of the lens in a linear (non-circular) motion.
5. Use the same brush to lightly wash the ridged side of the lens by
following its ridges.
6. Dip the lens in a clean isopropyl alcohol/water mixture (9 parts
water to 1 part isopropyl alcohol).
7. Dry the smooth and ridged surfaces with an air gun. Make sure
that the air flow moves liquid away from you.
8. Inspect the lens for dirt. Repeat steps 3–7 if necessary.
9. Set the lens back in the lens tube with the ridged side facing the
front of the tube. Reinstall the lens brackets.
10. Slide the lens tube back into the barrel with the retaining clip for
the color frame on top. Reinstall the beam focus knob.