Armasight NSMSIRIUS1GMDA1 Sirius GEN 3 Ghost MG Multi-Purpose Night Vision Monocular - Manual (Page 36)

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E. Chicken Wire
Chicken wire is an irregular pattern of dark thin lines that can appear in the field of view, either through-
out the image area or in sections of the image area (See Figure 4-5). In the worst-case scenario, these
lines will form hexagonal or square-wave shaped lines. No action is required if this condition is present,
unless it interferes with the user’s ability to view the image or their ability to perform missions.
FIGURE 4-5. CHICKEN WIRE
4.4 MAINTENANCE
4.4.1 GENERAL
The section regarding Sirius operator maintenance consists of operational tests, inspections for the
unit serviceability, cleaning and mounting procedures, troubleshooting, and replacement instructions
for a limited number of parts. Maintenance instructions covered elsewhere in this manual (PMCS, trou-
bleshooting, etc.) are not repeated in this section.
CAUTION:
The Sirius is a precision electron-optical instrument, and must be handled carefully at all times
to prevent damage to the device’s body or mechanisms.
4.4.2 CLEANING PROCEDURES
CAUTION:
The coating on the demist shield can be damaged if the shield is cleaned while wet, or if it is
cleaned with wet lens paper. Clean the shield only when it is dry, and only use dry lens paper.
CAUTION:
Thoroughly dry each item before placing them into the storage case.
Clean the Sirius as follows:
1. Gently brush off any dirt from the unit’s body using a clean, soft cloth.
2. Moisten the cloth with fresh water and gently wipe external surfaces (except for glass surfaces).
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 (including the pho-
toreceiver and the pivotal focusing lens). Without touching the lens holders, clean the glass surfaces