Armasight NRWVULCAN439DB1 Vulcan 4.5X Gen3 Bravo MG - Compact Professional 4.5x Night Vision Rifle Scope - Manual (Page 31)

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4.3 IDENTIFICATION OF OPERATIONAL DEFECTS
4.3.1 OPERATIONAL DEFECTS
Operational defects relate to the reliability of the intensifier, and are an indication of instability. If iden-
tified, the user will need to return the Vulcan immediately. Operational defects include shading, edge
glow, flashing, flickering, and intermittent operation.
A. Shading
If shading is persistent, you will not be able to see a fully circular image (Figure 4-1). Shading is a very
dark, high-contrast area with a distinct line of demarcation present, and you cannot see an image
through it. Shading always begins on the edge, and will eventually migrate inward until it spans across
the entire image area. If you notice shading with your device, please contact Customer Support.
SHADING
FIGURE 4-1. SHADING
NOTE:
Verify that any shading is not the result of improper eye-relief adjustment.
B. Edge Glow
Edge glow is a bright area (it sometimes appears to be coloring) in the outer portion of the viewing area
(see Figure 4-2). To check for edge glow, block out all light from the device by cupping a hand over the
lens. If the image tube is displaying edge glow, the bright area will still show up; if edge glow occurs,
please contact Customer Support.
EDGE
GLOW
FIGURE 4-2. EDGE GLOW
C. Flashing, Flickering, or Intermittent Operation
The image may appear to flicker or flash. If there is more than a single flicker, check for a loose battery
adapter or a weak battery. If flickering continues, please contact Customer Support.
4.3.2 COSMETIC BLEMISHES
Cosmetic blemishes are usually the result of manufacturing imperfections. They do not affect the reli-
ability of the image intensifier, and are not normally cause for returning the Vulcan. However, some
types of cosmetic blemishes can worsen over time and interfere with the user’s ability to properly oper-