MNVD-TM-ITI OPERATOR MANUAL FOR THE Monocular Night Vision Device (MNVD) Rev.
SAFETY SUMMARY GENERAL This manual contains operating instructions and maintenance procedures which may cause injury or death to personnel, or damage to equipment if not properly followed. Prior to performing any task, the WARNINGs, CAUTIONs and NOTEs included in that task shall be reviewed and understood.
SAFETY PRECAUTIONS The following general safety precautions supplement the specific WARNINGs, CAUTIONs and NOTEs that appear elsewhere in this manual. WARNING The Infrared (IR) LED Illuminator is detectable by an enemy using night vision devices. Detection is easier in smoky, foggy, or rainy conditions. To reduce the risk of detection by an enemy using night vision devices, avoid prolonged activation of the IR LED Illuminator.
WARNING Remove the MNVD from the weapon before inspecting, cleaning, or performing other maintenance functions. WARNING • Do not short circuit, puncture, incinerate, or disassemble battery. • Do not attempt to recharge battery. • Prior to use, inspect battery for cracks, dents, leakage, or bulging. Never install a defective battery in the MNVD. WARNING Lithium batteries can explode or cause burns if disassembled, shorted, recharged, exposed to water, fire, or high temperatures (above 100°C or 212°F).
CAUTION Do not ship or store the MNVD with the battery installed. CAUTION Pointing the MNVD at the sun without the lens cover installed may damage internal imaging components. CAUTION The coating on the demist shield may be damaged if cleaned while wet. Clean the demist shield only when dry and using dry lens tissue. CAUTION Use of acetone or gun cleaning agents containing perchloroethylene or methylene chloride may permanently damage the MNVD.
TABLE OF CONTENTS SAFETY SUMMARY ....................................................................... i TABLE OF CONTENTS ................................................................. v LIST OF FIGURES ....................................................................... vii LIST OF TABLES ......................................................................... vii CHAPTER 1 ......................................................................................1-1 INTRODUCTION .....................
TABLE OF CONTENTS – Continued CHAPTER 3 ......................................................................................3-1 MAINTENANCE ..........................................................................3-1 SECTION I ..............................................................................3-1 OPERATOR MAINTENANCE ...........................................3-1 3.1 TROUBLESHOOTING PROCEDURES ............... 3-1 3.2 INSPECTION / CLEANING...................................3-3 3.
LIST OF FIGURES Figure 1-1 Headmounted MNVD .....................................................1-1 Figure 1-2 Major Components .........................................................1-5 Figure 1-3 Features and Controls ....................................................1-8 Figure 2-1 Battery Installation ..........................................................2-2 Figure 2-2 Low Battery Indicator......................................................2-3 Figure 2-3 Headmount Assembly ...................
CHAPTER 1 INTRODUCTION SECTION I GENERAL INFORMATION Figure 1-1 Headmounted MNVD 1.1 SCOPE This manual is intended for use by operators of the Monocular Night Vision Device (MNVD). It provides a system description, operational procedures, and maintenance responsibilities. Complete familiarization with this manual prior to using the equipment will ensure safe operation and maximum effectiveness of the MNVD.
1.2 MODEL NUMBER AND EQUIPMENT NAME 245620, Monocular Night Vision Device (MNVD) 1.3 MANUFACTURER L-3 Communications Corporation Warrior Systems Division Insight Operations 9 Akira Way Londonderry, NH 03053 USA 1.4 PURPOSE OF EQUIPMENT The MNVD allows for observation under adverse conditions including light rain, smoke, light snow, and low light to total darkness. 1.
SECTION II EQUIPMENT DESCRIPTION 1.6 SYSTEM DESCRIPTION The MNVD is a portable, battery operated night vision device with an integrated IR light source. It can be used as a handheld device or may be mounted to a weapon, helmet, or headmount assembly. When used in the normal operating mode (ON), the MNVD amplifies available ambient light to allow for observation under adverse conditions including light rain, smoke, light snow, and low light conditions.
1.7 TECHNICAL SPECIFICATIONS Table 1-1 provides technical specifications for the MNVD. Table 1-1 Technical Specifications WEIGHT AND DIMENSIONS Weight < 14.1 ounces (400 g) Length 6.5 inches (16.5 cm) (with standard eyecup) Width 2.8 inches (7.1 cm) Height 2.4 inches (6.1 cm) POWER AND PERFORMANCE Battery One 1.5V AA lithium battery Battery Life 1 > 15 hours Magnification 1x Field of View 40° (± 2°) Objective Focus 9.
1.8 MAJOR COMPONENTS The MNVD system includes the components shown in Figure 1-2. Table 1-2 provides a brief functional description of each item. The “Key” column in Table 1-2 corresponds to the label numbers in Figure 1-2.
1.8 MAJOR COMPONENTS – Continued Table 1-2 List of Major Components Key Major Component Function 1 Brow Pads Used on the headmount assembly to provide maximum comfort and best fit. 2 Headmount Assembly Worn on the head to permit hands-free operation of the MNVD. 3 Soft Carrying Case Protects the MNVD and accessories while in a field environment. 4 Operator Manual Provides detailed operating and maintenance procedures specific to the MNVD.
1.8 MAJOR COMPONENTS – Continued Table 1-2 List of Major Components – Continued Key Major Component Function 10 Headmount Adapter Allows the MNVD to be installed on the headmount assembly or a suitably configured helmet. 11 Weapon Mount Assembly Allows the MNVD to be mounted to weapons equipped with a MIL-STD1913 rail. 12 Eyecup, Shuttered Reduces emission of stray light from the eyepiece when the MNVD is used in a weapon-mounted configuration.
1.9 FEATURES AND CONTROLS Figure 1-3 shows features and controls for the MNVD. Table 1-3 provides a brief functional description of each item. The “Key” column in Table 1-3 corresponds to the label numbers in Figure 1-3.
1.9 FEATURES AND CONTROLS – Continued Table 1-3 List of Features and Controls Key Major Component Function 1 Objective Lens Collects available light within the viewed scene and focuses it onto the input surface of an image intensifier (I2) tube. 2 Focus Ring Used to focus the MNVD from 9.8 inches (25cm) to infinity. 3 High Light Sensor Detects ambient light conditions so that the I2 tube will be automatically shut off if conditions are so bright as to risk damaging internal components.
1.9 FEATURES AND CONTROLS – Continued Table 1-3 List of Features and Controls – Continued Key Major Component Function 9 Neck Cord Holds the objective lens cover captive to the MNVD. Allows for the MNVD to be worn around the neck during periods of nonuse. 10 IR LED Illuminator Used to provide a supplementary light source in conditions of extreme darkness. 11 Gain Control Knob Used to adjust the gain (contrast) of the viewed image.
CHAPTER 2 OPERATING INSTRUCTIONS SECTION I PREPARATION FOR USE 2.1 PREPARATION FOR USE Unpacking the Equipment Open the soft carrying case and verify that all major components listed in Table 1-2 are present. Check the MNVD to ensure the following additional items are included: a. Eyecup b. Lens Cover c. Battery Cap d. Neck Cord If any of the major components or items listed above are missing, seek guidance from the equipment issuing authority.
2.2 BATTERY HANDLING Battery Inspection Before installation, inspect the battery for any cracks, dents, leakage, or bulging. Never install a defective battery in the MNVD. Battery Installation Access the battery compartment by turning the battery cap counterclockwise. Install one AA lithium battery with the positive terminal facing in as shown in Figure 2-1. Proper battery orientation is clearly marked on the MNVD housing. Replace the battery cap and turn clockwise to tighten.
2.2 BATTERY HANDLING – Continued CAUTION Do not ship or store the MNVD with battery installed. Low Battery Indicator A red light visible through the eyepiece, just outside the intensified field of view, indicates a low battery condition. It will illuminate when approximately 30 minutes of operation remain. FIELD OF VIEW LOW BATTERY INDICATOR Figure 2-2 Low Battery Indicator 2.
2.3 HEADMOUNT ASSEMBLY – Continued Donning the Headmount Assembly The following procedures for donning the headmount assembly should be performed before attaching the headmount adapter and MNVD. 1. Review Figure 2–3 to gain familiarity with the labeled items that will be referred to in this section.
2.3 HEADMOUNT ASSEMBLY – Continued 2. Loosen the four chin straps until the ends of each strap are approximately two inches from the sliding bar buckles. 3. Ensure the front and rear snaps are engaged. 4. Position the neck pad on the back of the neck and pull the headmount assembly over the head. 5. Remove slack from the two rear chin straps but do not tighten. 6. Adjust front and rear chin straps and vertical adjustment strap until the headmount assembly is in a comfortable but firm position.
2.3 HEADMOUNT ASSEMBLY – Continued THUMBSCREW MOUNTING INTERFACE Figure 2-4 Headmount Adapter Installation 3. The headmount adapter is now installed on the MNVD. Mounting Align the headmount adapter with the receptacle on the headmount assembly as shown in Figure 2-5 and push the parts together until the mating features engage. To disengage, press the release lever shown below.
2.3 HEADMOUNT ASSEMBLY – Continued RELEASE LEVER Figure 2-5 Mounting to Headmount Assembly Positioning Adjustments With the MNVD system installed, positioning adjustments must be made for maximum performance and comfort. Figures 2-6 and 2-7 show controls used for positioning adjustments. NOTE Positioning adjustments are made with the MNVD attached to the headmount, the eyecup installed, and the headmount properly donned. The MNVD cannot be properly adjusted until the headmount itself is correctly fitted.
2.3 HEADMOUNT ASSEMBLY – Continued NOTE Optimal system performance and comfort of the operator rely on carefully following the procedures below. The best visual performance is possible only when the optical axis of the device is aligned with the visual axis of the eye. • Fore / Aft Adjustment. The MNVD can be moved forward or backward relative to the head. Press the fore / aft release button and slide the MNVD forward or backward to achieve optimal eye relief.
2.3 HEADMOUNT ASSEMBLY – Continued • Height Adjustment. The headmount’s vertical adjustment strap (see Figure 2-3) provides for height adjustment of the MNVD. Tighten or loosen the vertical adjustment strap until the MNVD is level with the operator’s eyes. • Pupillary Adjustment. The MNVD can be moved in an arc to provide best alignment with the operator’s eye. Unscrew the adjustment knob to its full and open position (see Figure 2-7).
2.3 HEADMOUNT ASSEMBLY – Continued The first row in Table 2-1 shows the optimal field of view for the MNVD when positioning adjustments are correctly performed. The remaining rows show unsatisfactory fields of view when positioning adjustments are performed incorrectly, along with corrective action that can be taken to resolve the problem. Table 2-1 Field of View and Positioning Adjustments Field of View Remarks / Corrective Action Optimal alignment. Eye relief too long. Correct fore and aft adjustment.
2.3 HEADMOUNT ASSEMBLY – Continued Table 2-1 Field of View and Positioning Adjustments – Continued Field of View Remarks / Corrective Action Positioned too high. Correct height adjustment. Positioned too low. Correct height adjustment. MNVD field of view Eyepiece field of view Obstructed MNVD field of view 2.4 WEAPON MOUNTING INSTRUCTIONS The weapon mount assembly allows the MNVD to be mounted to weapons equipped with a MIL-STD-1913 rail.
2.4 WEAPON MOUNTING INSTRUCTIONS – Continued Installing the Weapon Mount Assembly 1. With the MNVD in one hand, use the free hand to orient the weapon mount assembly above the mounting interface as shown in Figure 2-9. Keying features in the weapon mount assembly and mounting interface allow only one orientation. 2. Rotate the thumbscrew clockwise to secure the weapon mount assembly to the MNVD, taking care not the cross threads.
2.4 WEAPON MOUNTING INSTRUCTIONS – Continued Mounting the MNVD WARNING Be sure the weapon is CLEAR and SAFE before proceeding. 1. Loosen the mounting screw on the weapon mount assembly until the jaws have sufficient space to fit over the weapon rail. 2. Position the MNVD facing forward, ensuring the recoil lug is seated in the desired recoil groove of the rail. While pushing down and forward on the MNVD, turn the mounting screw clockwise until snug.
2.5 LENS ACCESSORIES Objective Lens Cover The objective lens cover affords additional protection to the objective lens and protects the MNVD’s internal imaging components. It should be pressed into place (installed) over the objective lens whenever the MNVD is not being used. It should also be installed when the MNVD is being used in brightly lit environments. A small hole in the center of the lens cover allows enough light to enter the MNVD when operating in these conditions.
2.4 LENS ACCESSORIES – Continued The demist shield is provided to protect the eyepiece from becoming scratched or otherwise damaged, and to prevent fogging of the eyepiece. It should be installed whenever the MNVD is in use. With the eyecup removed, place the demist shield over the eyepiece with the narrow side in. Taking care not to smudge the eyepiece or demist shield, press the demist shield into place.
SECTION II OPERATING INSTRUCTIONS 2.6 MODES OF OPERATION The MNVD is powered on by turning the Mode Switch to the desired position. CAUTION Pointing the MNVD at the sun without the lens cover installed may damage internal imaging components. NOTE The MNVD is equipped with a high light sensor (see Figure 1-3) that detects ambient light conditions and automatically shuts down the I2 tube if conditions are so bright as to risk damaging internal components.
2.6 MODES OF OPERATION – Continued Table 2-2 Mode Switch Operation Mode Switch Position RESET OFF ON IR PULL Effect Turns MNVD off. Resets the MNVD after a high light shutdown. Activates the MNVD using (and amplifying) available, ambient light. Activates the MNVD using the IR LED Illuminator to provide an integrated light source in conditions of extreme darkness. 2.7 IR LED ILLUMINATOR WARNING The IR LED Illuminator is detectable by an enemy using night vision devices.
2.7 IR LED ILLUMINATOR – Continued IR LED ILLUMINATOR INDICATOR FIELD OF VIEW Figure 2-12 IR LED Illuminator Indicator 2.8 GAIN (CONTRAST) The MNVD is equipped with a gain control knob used to adjust the gain (contrast) of the viewed image. When looking through the eyepiece, turning the gain control knob clockwise will provide more contrast. Turning the gain control knob counterclockwise will provide less contrast. 2.9 FOCUS The objective lens must be focused for the viewing distance being observed.
2.10 DIOPTER ADJUSTMENT The eyepiece may be focused to accommodate differences in the visual acuity of individual operators, from +2 to -6 diopters. While looking at an object at least 9.8 inches (25cm) from the MNVD, rotate the diopter adjuster to achieve the sharpest possible image. 2.11 STARTUP PROCEDURES To achieve optimal performance and image clarity, the following procedures should be accomplished in the order presented, each time the MNVD is placed into use. 1.
CHAPTER 3 MAINTENANCE SECTION I OPERATOR MAINTENANCE 3.1 TROUBLESHOOTING PROCEDURES The procedures below will help correct some of the basic problems that may arise with the MNVD. If the equipment malfunction is not listed, or the actions listed do not correct the fault, refer to section 3.4 for additional guidance. Table 3-1 Troubleshooting Procedures Malfunction 1. No image is present when turning on the MNVD. Probable Cause a. Batteries are improperly installed. b. Battery power is low. c.
3.1 TROUBLESHOOTING – Continued Table 3-1 Troubleshooting Procedures – Continued Malfunction Probable Cause 3. Poor or c. Insufficient ambient degraded image – light. Continued. d. Gain (contrast) not adjusted to an appropriate setting. e. Not focused for viewing distance being observed (minimum 9.8 inches). f. Diopter setting not adjusted correctly. g. Sacrificial window and/or demist shield obscured by dirt, dust, or grime. h. Sacrificial window and/or demist shield cracked or scratched. i.
3.2 INSPECTION / CLEANING The operator should inspect the MNVD before each use and after it has been in extreme conditions, such as prolonged exposure to intense temperatures. The following procedures will extend the life of the MNVD and help ensure safe operation. WARNING Remove the MNVD from the weapon before inspecting, cleaning, or performing other maintenance functions. WARNING Prior to performing any inspection or maintenance procedure, verify that batteries are not installed.
3.2 INSPECTION / CLEANING - Continued Battery Cap Inspect the battery cap for dirt, sand, and grime. Thoroughly clean the battery cap and o-ring by flushing with water and wiping with a cotton swab. Periodically lubricate the o-ring with fluorinated grease. If necessary, clean the battery contact with a cotton swab and isopropyl alcohol. Optical Surfaces CAUTION The coating on the demist shield may be damaged if cleaned while wet. Clean the demist shield only when dry and using dry lens tissue.
3.3 CORRECTIVE MAINTENANCE PROCEDURES The MNVD has no internal parts or assemblies replaceable by the user or organizational level personnel. Refer to section 3.4 regarding maintenance and/or repair actions beyond those described in this manual. Replacing Battery Compartment O-Ring No tools are required to perform this procedure. 1. Access the battery compartment by turning the battery cap counterclockwise. 2.
3.
SECTION II SERVICE / PACKING AND UNPACKING 3.4 SERVICE / REPAIR For service, repair, or replacement, first e-mail returns.insight@l-3com.com or call toll-free 1-877-744-4803. To assist with determining if the item is repairable, the following information will be requested: a. Serial number of the defective item; b. Thorough description of the malfunction, defect, or damage; and c. If known, an explanation as to how the malfunction, defect or damage occurred.
3.4 RETURN INSTRUCTIONS – Continued Place the item and a copy of the test report or detailed description of the failure in a suitable packing container. Mark the package with “Field Return” and the RMA number. Ship via fastest, traceable, pre-paid means to: L-3 Communications Corporation Warrior Systems Division Insight Operations 9 Akira Way Londonderry, NH 03053 3.
APPENDIX A REPAIR PARTS LIST SCOPE This Appendix lists end item components and repair parts for the MNVD.
SCOPE – Continued Table A-1 List of End Item Components ITEM NO.
SCOPE – Continued 1 2 4 3 Figure A-2 MNVD Assembly Table A-2 List of Repair Parts ITEM NATIONAL NO.
APPENDIX B ACCESSORIES SCOPE This Appendix lists accessories available for support of the MNVD.
The MNVD Is designed and produced by: L-3 Communications Corporation Warrior Systems Division Insight Operations 9 Akira Way Londonderry, NH 03053 USA Phone 603.626.4800 / Fax 603.626.4888 www.l3warriorsystems.com This manual contains technical data whose export is governed by the U.S. International Traffic in Arms Regulations (ITAR). This information must not be transferred to a foreign person without the proper authorization of the U.S. Government.
