1. Manuals
  2. Brands
  3. COT Manuals
  4. Riflescope
  5. NM-108 BC
  6. User manual

COT NM-108 BC User Manual

Night vision module
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
NIGHT VISION MODULE
COT NM-108 BC
Modern Optical Technologies

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the NM-108 BC and is the answer not in the manual?

Questions and answers

Summary of Contents for COT NM-108 BC

  • Page 1 NIGHT VISION MODULE COT NM-108 BC Modern Optical Technologies...
  • Page 2 NOTES: • Optical axes of the COT NM-108 BC and day scope should align. It is not recommended for the distance between the axes to exceed 3 mm. If the difference in the axis heights of the COT NM- 108 BC and day scope above the weapon rail exceeds 3 mm, you will need to replace the day scope mounting rings or monoblock.

  • Page 3: Manual Overview

    (hereafter referred to as a “day scope”). When mounted on a weapon in front of an exist- ing day scope, the NM-108 BC adds to the scope’s capabilities a night vision function (up to range of 900m), without affecting the boresight. Advisable day scope magnification values are 3 to 12X (4 to 10X are optimal).

  • Page 4: Chapter 2. Description And Data

    IIT screen to infinity, and the resulting image is magnified when viewed through the day scope. As such, when the NM-108 BC mounted in front of the day scope, it converts the latter into a night vision sight.
  • Page 5 The NM-108 BC is powered by a single AA or CR123A battery. The NM-108 BC uses a LED indicator to show the operator when the bright light protection system is activated, or to indicate a low battery. The Picatinny / Weaver mount (B) has an adjustable lever-cam clamping device for easy, quick and reliable mounting and removal of the NM-108 BC.
  • Page 6 — Over 65 lp/mm TABLE 2-3. MECHANICAL DATA ITEM DATA Dimensions (L×W×H) 235×97×80 mm Weight (without Mount and Remote Control) 0.91 kg Weight of Mount 0.1 kg Height of the NM-108 BC Axis above Weapon’s 40 mm Picatinny / Weaver Rail...
  • Page 7 TABLE 2-4. ELECTRICAL DATA ITEM DATA Battery Single AA (1.5V) or CR123A (3V) Cell Life at 20°C 25 hr (1.5V) / 45 hr CR123A (3V) Interrupting Time* 60 minutes * — Optional feature. Interrupting Time setting can be changed at the production stage, or the function can be completely disabled.
  • Page 8 2.3 Standard Components The NM-108 BC standard components are shown in Figure 2-3 and listed in Table 2-7. The ITEM NO. column indicates the number used to identify items in Figure 2-3. Figure 2-3. STANDARD COMPONENTS TABLE 2-7. STANDARD COMPONENTS...

  • Page 9: Chapter 3. Operating Instructions

    The NM-108 BC requires some ambient light (moonlight, starlight, etc.) to operate. Factors that can reduce natural night light and negatively affect the efficiency and operation of the NM-108 BC in- clude: rain, fog, sleet, snow, and smoke; passing cloud cover and objects that produce shadows; and low-contrast environments such as snow-covered territory, sandy deserts, large bodies of water or grassy hills.
  • Page 10 Figure 3-1. THE NM-108 BC. BATTERY INSTALLATION Figure 3-2. POSITIONS OF THE ADAPTER IN THE BATTERY CAP 3.1.2 Installing the NM-108 BC on a Picatinny / Weaver Rail WARNING: When installing the equipment on a weapon, be sure the weapon is clear and the safety is on be- fore proceeding.
  • Page 11 3-4) and unlocking the levers (B). 4. Install the NM-108 BC on the Picatinny / Weaver rail in front of the day scope so that the stops (A, Figure 3-5) slide into the transverse slots on the rail. The light suppressor should cover the day scope’s objective lens.
  • Page 12 The eight-sided nuts of the mount lever-cam locks will only fit into their hollows only if turned in one of the discrete positions using increments equal to 360 4. Verify that the adjusted lever-cam lock is firmly holding the NM-108 BC. 5. Repeat the procedure to adjust the clamping device’s second lever-cam lock.
  • Page 13 Using Velcro tape (A), fasten the wireless remote control unit (B) (Figure 3-7) to a weapon in an eas - ily accessible place (e.g., on the front of the rifle stock) on the side of the NM-108 BC’s control com- partment preferably.
  • Page 14 Closes / opens the photoreceiver when placed in the highest / lowest position. Gain Control Knob Adjusts the brightness of the image. Turn Switch Switches on the NM-108 BC, when turned CW from OFF to ON position. NOTE: Both ON and STB positions can only be entered if the switch is unlocked by pushing the spring-loaded stop (5) before turning.
  • Page 15 THAT PHOTORECEIVER IS OPEN. 4. Verify that there are no bright light sources in the NM-108 BC field of view. Turn the device on. After a slight delay, a green glow will appear in the day scope’s output lens. CAUTION: AVOID EXPOSING THE DEVICE TO BRIGHT LIGHT SOURCES SUCH AS FIRELIGHT, HEADLIGHTS, SEARCHLIGHTS, ETC., AS THESE CAN DAMAGE THE NM-108 BC.

  • Page 16: Chapter 4. Preventive Maintenance And Troubleshooting

    REMOVE THE LIGHT SUPPRESSOR FROM THE NM-108 BC TO AVOID DEFORMATION OR DAMAGE. 7. Ensure that the NM-108 BC and any accessories are clean and dry before placing them into the storage case. 8. Place the NM-108 BC and any accessories into the storage case.

  • Page 17: Checking Procedure

    OPERATIONAL CHECKS CAUTION: The objective lens cap has an optical filter, which allows operational testing of the NM-108 BC in daylight. Activate the NM-108 BC in daylight with the objective lens cap on or in dark conditions. NOTE: Daylight checks are described below.
  • Page 18 NM-108 BC. Perform the tests, inspections, and corrective actions in the order listed in the table. This table cannot list all of the malfunctions that may occur with the NM-108 BC, or all of the tests and corrective actions that may be necessary. If you experience an equipment malfunction that is not listed, or is not fixed by the corrective actions listed in the table, please contact Armasight’s...
  • Page 19 4.3.1 Operational Defects Operational defects relate to the reliability of the intensifier, and are an indication of instability. If identified, the user will need to return the NM-108 BC immediately. Operational defects include shading, edge glow, flashing, flickering, and intermittent operation.
  • Page 20 Cosmetic blemishes are usually the result of manufacturing imperfections. They do not affect the reliability of the image intensifier tube, and are not normally a cause for returning the NM-108 BC. However, some types of cosmetic blemishes can worsen over time and interfere with the user’s ability to properly operate the device during missions.

  • Page 21: Fixed Pattern Noise

    A bright spot is a small, non-uniform bright area that may flicker or appear constant (Figure 4-3). Not all bright spots make the NM-108 BC returnable. Cup your hand over the lens to block out all light. If the bright spot remains, please contact Customer Support.
  • Page 22 Maintenance instructions covered elsewhere in this manual (PMCS, trou- bleshooting, etc.) are not repeated in this section. CAUTION: The NM-108 BC is a precision electro-optical instrument and must be handled carefully at all times to prevent damage. 4.4.2 Cleaning Procedures CAUTION: Thoroughly dry each item before placing them into the storage case.

  • Page 23: Estimation Of Ambient Illumination Level

    4.4.3 Battery Removal and Replacement Refer to Parts 3.1.1 for the NM-108 BC battery installation procedure, respectively. Replace the remote control batteries as follows: 1. Using a screwdriver, unscrew the four screws (A, Figure 4-6) that affix the cover to the bottom of the unit.

Table of Contents