EOTech 553 - Manual (Page 4)

CAUTION
• Never disassemble the sight’s optical assembly. The optical cavity is purged,
nitrogen filled, and sealed to achieve fog proof performance. Disassembly will
void the warranty and render the sight inoperable.
• There is a 12 volt battery that is approximately the same size as the Type N 1.5 volt
alkaline battery used in the M551. DO NOT USE the 12 volt batteries. They will
severely damage the sight.
• When used with a Night Vision device, always check to make sure the sight is off
before pressing the NV button to turn on the sight in the Night Vision mode.
Otherwise, it will toggle to the Normal mode and saturate the image intensifier.
• When a sudden increase in resistance is felt in the elevation or windage adjustment
shafts, the end of the adjustment range has been reached. DO NOT TURN THE
ADJUSTMENTS ANY FARTHER OR SERIOUS DAMAGE MAY OCCUR TO THE
SIGHT.
• Never clean the glass surface with a dry cloth or paper towel; always dampen the
glass surfaces prior to cleaning