Armasight NAM601500126DH1 PVS14/6015 GEN 2+ HD Multi-Purpose Night Vision Monocular - Manual (Page 26)

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(9) To pass the test, the MUNVM must be able to resolve Group 3, Element 5, under high light condi-
tions. If the monocular does not pass the test, please contact Customer Support, as you will need to
return the device for repair.
NOTE :
When using the TS-4348/ UV Test Set, you are not viewing the entire image intensifier. There-
fore, operational and cosmetic inspections must be done without the test set as specified in
paragraph 3.2.3.
(10) Check for flashing, flickering, and other unstable behavior or operational defects (paragraph 3.2.3)
in the image intensifier. To view the image intensifier under low light conditions, flip the HIGH/ LOW
switch to LOW and allow your eyes to become accustomed to the dark. If any unacceptable conditions
are noted, contact Customer Support
3.2.3. INSPECTION CRITERIA FOR PROPER IMAGE INTENSIFIER OPERATION
a. General
As directed in the Preventive Maintenance Checks and Services table, image intensifier operation must
be checked before each mission. This section provides information for the operator concerning what
to look for, how to look for it, and how to determine if the MUNVM should be returned to the manu-
facturer.
CAUTION :
Perform the following inspection in the dark.
To perform this inspection, attach the monocular to the headmount as described in paragraph 3.3.7,
and turn the device ON. Look through the monocular and observe the image.
There are two groups of “defects” you may encounter – operational defects and cosmetic blemishes.
Operational defects are a definite reason for returning the MUNVM. Cosmetic blemishes are not neces-
sarily a cause for rejection unless they become severe enough to interfere with the device’s operational
ability. The return of any MUNVM for cosmetic defects must be based on an outdoor evaluation and
not the TS-4348/ UV Test Set.
b. Operational Defects
These defects relate to the reliability of the image intensifier and are an indication of instability. If iden-
tified, they are an immediate cause for rejecting the MUNVM. They include shading, edge glow, flash-
ing, flickering, and intermittent operation.
(1) Shading. If shading is present, you will not see a fully circular image (see Figure 3-3). Shading is very dark
and you cannot see an image through it. Shading always begins on the edge and migrates inward eventually
across the entire image area. Shading is a high contrast area with a distinct line of demarcation. Return the
MUNVM to the maintainer.
SHADING
Figure 3-3. Shading