Armasight NSGSPARK01CCIC1 Spark-G Night Vision Goggles - Manual (Page 31)

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BRIGHT
SPOT
EMISSION
POINT
FIGURE 4-3. EMISSION POINTS AND BRIGHT SPOTS
C. Black Spots
Black spots are cosmetic blemishes in the image intensifier or debris between the lenses. Black spots
are acceptable as long as they do not interfere with the user’s ability to observe the scene. No action
is required if this condition is present, unless the spots interfere with the operator’s ability to perform
missions.
4.4 MAINTENANCE
4.4.1 GENERAL
The section regarding Spark 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 Spark 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 Spark 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).