Armasight NSGSPARK01CCIC1 Spark-G Night Vision Goggles - Manual (Page 32)

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3. Dry any wet surfaces (except for glass surfaces) with another clean, soft, dry cloth.
4. Using a lens brush, carefully remove all loose dirt from the glass surfaces.
5. Slightly dampen a cotton swab with ethanol. Gently and slowly wipe the lenses. Without touching
the lens holders, clean the glass surfaces in circular movements, beginning in the center and moving
out towards the edge. Change the cotton swab after each circular stroke. Repeat until the glass surfaces
are clean.
6. Clean the battery contact surfaces and contact springs with a pencil eraser and/ or alcohol-damp-
ened cotton swabs.
Clean optional mounting devices with a soft brush (cloth), soap, and water as required.
Clean optional lenses as detailed in items 4 and 5 above (except for the demist shield).
4.4.3 BATTERY REMOVAL AND REPLACEMENT
Refer to Part 3.1.1 for battery installation procedures. No special tools are required to replace the bat-
tery.
4.4.4 GOGGLE KIT MAINTENANCE
A. Browpad Replacement
Replace the browpad when cracked, torn, or contaminated. Perform the following to remove and re-
place the browpads:
1. Firmly grasp the goggle kit and remove the old browpad.
2. Gently press on the new browpad. Gently smooth out any wrinkles in the new browpad.
FIGURE 4-4. BROWPAD REPLACEMENT
B. Chin Strap Reinstallation
1. Detach the Velcro tape from the left side of the head-band and remove the chin strap. Unfasten the
chin strap from the strap assembly.
2. Replace the chin strap by joining the sides of the Velcro tape on the left side of the head-band and
threading the end of another strap into the corresponding buckle on the right side of the head-band.
FIGURE 4-5. CHIN STRAP REINSTALLATION