NVM14 Manual

INTRODUCTION

1.1. GENERAL INFORMATION

A. TYPE OF MANUAL

Operator (Including Repair Parts List).

B. MODEL NUMBER AND BASIC DESCRIPTION

ATN NVM-14 - Multi-Use Night Vision Monocular

C. SUPPLIER

American Technologies Network Corp.
1341 San Mateo Avenue,
South San Francisco, CA 94080 USA

D. PURPOSE OF EQUIPMENT

To provide the user with the ability to observe at night under moonlight and starlight conditions. The ATN NVM-14 can be handheld, head mounted, helmet mounted or weapon mounted to enable walking, surveillance, security, map reading, vehicle maintenance, and administering first aid. The unit allows for horizontal and vertical adjustments when head or helmet mounted and is also equipped with an infrared light-emitting source.

1.2. WARRANTY INFORMATION

This item shall conform to design, manufacturing, and performance requirements and be free from defects in material and workmanship for a period of two (2) years from the date of acceptance. If item is defective, notify ATN or point of purchase contact.

1.3. TECHNICAL INFORMATION

For technical information contact ATN Corp. directly at 650-989-5100, or info@atncorp.com, or your point of purchase contact.

1.4. LIST OF ABBREVIATIONS

• BAT - Battery
• Illum - Illuminator
• IR - Infrared
• mm - Millimeters
• NVG's - Night Vision Goggles

EQUIPMENT DESCRIPTION

2.1. SYSTEM DESCRIPTION

The ATN NVM-14 is a hand-held, head-mounted, helmet-mounted, or weapon-mounted night vision system that enables walking, short-range surveillance, map reading, vehicle maintenance, and administering first aid in both moonlight and starlight. Each unit allows for vertical adjustment (by using head straps), fore-and-aft adjustment, objective lens focus, and eyepiece focus. The device is also equipped with an infrared light-emitting source.

NVM-14 Night Vision Monocular utilizes the principle of intensification of the residual light which is reflected from the surrounding objects. The optical system of the monocular consists of an objective lens, an image intensifier tube and an eyepiece.

Even under unsteady brightness conditions, Automatic Brightness Control System always keeps the IIT brightness level constant.

NOTE:
Automatic Brightness Control System does not protect a device from damage by bright light sources such as fire, automobile headlights, lanterns, or similar sources. Do not point the device at a bright light source.

The Automatic Protective System controls the existing illumination level through the photo receiver. If the illumination level surpasses 100-300 lx for the following 10 seconds, the monocular will shut off automatically.

The scope is equipped with the Automatic Shut-off System. This system tracks when the scope is not used, meaning the controls are not touched for 60 continuous minutes, and shuts the unit off automatically.

Built-in IR illuminator makes it possible to observe objects when the monocular works in the conditions of low light or total darkness.

The eyepiece incorporates several LED indicators:

• Green LED - stays solid green when the battery is full and flashes when the battery is low.
• Red LED - turns on when IR is on.

2.2. WEIGHT, DIMENSIONS, AND PERFORMANCE

Category	Specification	Value
Weight and Dimension	Weight (without battery)	280 grams
Weight and Dimension	Length	120 mm
Weight and Dimension	Width	49 mm
Weight and Dimension	Height	69 mm
Performance	Magnification	1X
Performance	f-Number	1.2
Performance	Field of View	40 degrees
Performance	Eyepiece Diopter Adj.	-6 to +2
Performance	Eye Relief	25 mm
Performance	Focusing Range	0.25 m to infinity
Performance	Voltage	3.0 VDC
Performance	Power Requirements	1 CR123A
Performance	IR Illumination Range	3 meters
Continuous Operation	1 CR123A battery	60 hours (Gen. 2+) 50 hours (Gen. 3 and 4)

2.3. DESCRIPTION OF MAJOR COMPONENTS

Category	Item	Description
Kit Components	1	Multi-Use Night Vision Monocular
Kit Components	2	Lens Cap
Kit Components	3	Eyecup
Kit Components	4	Soft Carrying Case
Kit Components	5	Operator's Manual
Kit Components	6	Battery 123A Lithium
Kit Components	7	Wrist Strap
Optional Components	1	3X Afocal Lens
Optional Components	2	5X Lens
Optional Components	3	8X Lens
Optional Components	4	Camera/Camcorder Adapter
Optional Components	5	Demist Shield
Optional Components	6	Sacrificial Window
Optional Components	7	IR-850-B1
Optional Components	8	Mil-Spec Head Mount Assembly Kit
Optional Components	9	Dual Bridge Adapter for Mil-Spec Headmount
Optional Components	10	Goggle Kit
Optional Components	11	Universal Helmet Mount
Optional Components	12	MICH Helmet Mount Kit
Optional Components	13	PASGT Helmet Mount Kit
Optional Components	14	Weapon Mount Adapter Picatinny/Mil 1913
Optional Components	15	Shoulder Strap
Optional Components	16	Dual Bridge
Optional Components	17	3x Binocular Lens (pair)
Optional Components	18	Hard Shipping/Storage Case

Item #	Description
ACMPAN14GK	Goggle Kit
ACMPAN14A1	Advanced Package 1
ACMPAN14A2	Advanced Package 2
ACMPAN14S1	Select Package 1
ACMPAN14S2	Select Package 2
ACMPAN14LS3A	3x Afocal Lens
ACMPAN14LS05	5x Lens
ACMPAN14LS08	8x Lens
ACMPAN14CA	Camera Adapter
ACMPAN14DB	Dual Bridge
ACMPAN14HMNT	Universal Helmet Mount Kit
ACMPAN14HMNM	MICH Helmet Mount Kit
ACMPAN14HMNP	PASGT Helmet Mount Kit
ACMUIR85B1	IR850-B1

Table 2.4. Goggle Kit
Description	Item (Fig. 2.2)
Flip-up Head Mount	11

Table 2.5. Advanced Package 1
Description	Item (Fig. 2.2)
Flip-up Head Mount	11
Demist Shield	5
Sacrificial Window	6
Camera Adapter	4
3x Afocal Lens	1
Mil-Spec Hard Case	18

Table 2.6. Advanced Package 2
Description	Item (Fig. 2.2)
Flip-up Head Mount	11
Demist Shield	5
Sacrificial Window	6
Camera Adapter	4
3x Afocal Lens	1
Mil-Spec Hard Case	18
Weapon Mount Adapter	14

Table 2.7. Select Package 1
Description	Item (Fig. 2.2)
Flip-up Head Mount	11
Demist Shield	5
Sacrificial Window	6

Table 2.8. Select Package 2
Description	Item (Fig. 2.2)
Flip-up Head Mount	11
Demist Shield	5
Sacrificial Window	6
Weapon Mount Adapter	14

Standard Kit Components

1. Multi-Use Night Vision Monocular. The monocular night vision device with 1x magnification.
2. Lens Cap. A cap used to protect the lens and for testing the unit in the daylight.
3. Eyecup. A rubber cup used to protect eyepiece and for operator comfort.
4. Soft Carrying Case. A protective bag used to store ATN NVM-14 and accessories.
5. Operator's Manual. Provides equipment description, use of operator controls and preventative maintenance checks and service.
6. Battery 123A Lithium. A single 123A lithium battery used to power the unit.
7. Wrist Strap.

Optional Components

1. 3X Afocal Lens. Attaches to the ATN NVM-14 for enhanced range performance while reducing the field of view to 13 degrees.
2. 5X Lens. Attaches to the ATN NVM-14 for enhanced range performance while reducing the field of view to 8 degrees.
3. 8X Lens. Attaches to the ATN NVM-14 for enhanced range performance and is tripod mountable.
4. Camera/Camcorder Adapter. This adapter attaches to the ATN NVM-14 eyepiece to collect imagery from the ATN NVM-14.
5. Demist Shield. Used to prevent eyepiece lenses from becoming fogged.
6. Sacrificial Window. A replaceable window supplied to protect the objective lens during operation in adverse conditions.
7. IR-850 IR Illuminator with Picatinny Adapter. Powerful 850mW infrared illuminator is an efficient tool for long range nighttime observation in total darkness.
8. Mil-Spec Head Mount Assembly Kit. This kit contains a Mil-Spec head mount and adapter which allows attaching the NVM14 to the Mil-Spec head mount.
9. Dual Bridge Adapter for Mil-Spec Headmount Assembly. The adapter allows attaching ATN NVM-14, while in binocular configuration, to the Mil-Spec head mount or PASGT or MICH helmet mount.
10. Goggle Kit. Adjustable universal assembly that secures the ATN NVM-14 to the operator's head providing hands-free operation.
11. Flip-up Universal Helmet Mount. Provides mount interface for the ATN NVM-14 to a range of ballistic helmets.
12. MICH Helmet Mount Kit. This kit contains a MICH helmet mount and adapter which allows attaching the NVM14 to the MICH helmet mount.
13. PASGT Helmet Mount Kit. This kit contains a PASGT helmet mount and adapter which allows attaching the NVM14 to the PASGT helmet mount.
14. Weapon Mount Adapter Picatinny/Mil 1913. Small arms adapter that allows the ATN NVM-14 to be mounted on a weapon using a Picatinny or Mil 1913 rail.
15. Shoulder Strap.
16. Dual Bridge. A Dual Bridge allows using the NVM14 as a pair of dual tube goggles.
17. 3x Binocular Lens (pair). A pair of 3x Afocal Binocular Lenses connected to each other through a Dual Bridge provide for a compact dual channel binocular.
18. Hard Shipping/Storage Case. A protective case used for shipping and storing the ATN NVM-14 and accessories.

MOUNTING PROCEDURES

3.1. MOUNTING PROCEDURES

A. MOUNTING THE ATN NVM-14 TO A HEADMOUNT

To mount the ATN NVM-14 to a headmount, perform the following:

1. Loosen the nut (C). Attach the adapter (A) to the rail (B) of ATN NVM-14. Tighten the nut (C) anew.
2. Align the adapter and the headmount. Slide the monocular rearwards until the alignment boss (D) aligns with the alignment groove (E) on the headmount. Push until the monocular locks into the headmount.
3. Place the headmount with NVM-14 onto a head.
4. Slide button (F) and move the unit along the rail for eye relief adjustment.
5. The NVM-14 headmount has a flip-up mechanism. Push the button (G) on the side of mount and lift the unit up until the unit reaches the top position.
6. Push the same button (G) to lower NVM-14 to the viewing position. Turn the device on for continuation of the operation.
7. The NVM-14 can be placed before the right or left eye. In order to readjust the monocular for use with the other eye, take the unit off the adapter, turn the unit to the other side by 180 degrees, and mount it on the headset through the rail on that side. Push the button (H) and move the device along the slide-rail (I) for a comfortable position.

B. MOUNTING THE ATN NVM-14 TO A HELMET

Attachment of ATN NVM-14 to a range of ballistic helmets. The helmet mount fits securely onto the helmet via a rugged strapping device and grooved hooks. With the helmet mount, the NVM-14 can be positioned directly in front of the user's eyes or flipped up out of the viewing position.

1. Loosen the nut (C). Attach the adapter (A) to the rail (B) of ATN NVM-14. Tighten the nut (C) anew.
2. Tighten and fixate the straps (D).
3. Align the adapter and the helmet mount. Slide the monocular rearwards until the alignment boss (H) aligns with the alignment groove (F) on the helmet mount. Push until the monocular locks into the helmet mount.
4. Place the helmet mount with NVM-14 onto a head.
5. Slide button (I) and move the unit along the rail for eye relief adjustment.
6. The NVM-14 helmet mount has a flip-up mechanism. Push the button (E) on the side of mount and lift the unit up until the unit reaches the top position.
7. Push the same button (E) to lower NVM-14 to the viewing position. Turn the device on for continuation of the operation.
8. The NVM-14 can be placed before the right or left eye. In order to readjust the monocular for use with the other eye, take the unit off the adapter, turn the unit to the other side by 180 degrees, and mount it on the headset through the rail on that side. Push the button (J) and move the device along the slide-rail (I) for a comfortable position.

C. MOUNTING THE ATN NVM-14 TO THE WEAPON

CAUTION:
It is recommended that the eyecup be replaced with the eyeguard when used mounted on the weapon. NOTE:
The ATN NVM-14 is not a weapon sight, however, it can be used in conjunction with a collimated dot sight or laser aiming device.

To mount the ATN NVM-14, perform the following:

1. Loosen the clamping knob on the weapon mount. Position the monocular mount onto the weapon's mounting rail. Adjust the fore-and-aft position of the monocular as necessary by loosening the clamping knob and repositioning the weapon mount on the rail. Tighten by turning the clamping knob.
2. Align the monocular and the weapon mount. Slide the monocular rearwards until the alignment boss aligns with the alignment groove on the weapon mount. Push until the monocular locks into the weapon mount.

D. DUAL BRIDGE

The Dual Bridge (A) is designed to connect two units into a binocular configuration.

Dual Bridge also allows the binocular configuration to be attached to the headmount or helmet mount.

To mount the units with the Dual Bridge, perform the following:

1. Align the unit and the Dual Bridge.
2. Push the clamps (B) on the front of the Bridge.
3. Slide the unit rearwards until the alignment boss aligns with the alignment groove (C) on the Bridge. Push until the unit locks into the Bridge.
4. Repeat for the second unit.

To detach the unit, push the clamps on the front of the Dual Bridge and slide the unit forwards.

Dual Bridge allows using the NVM14 with the 3x Binocular Lens as a pair of dual tube binoculars.

E. MOUNTING IR-850 TO THE ATN NVM-14

IR-850 may be mounted on the monocular through the Picatinny adapter.

1. Mount Picatinny adapter (A) onto one of the rails on the monocular. Tighten two fixing screws (B) of the adapter.
2. Loosen the IR-850 fixing screw (C).
3. Mount the IR-850 on the Picatinny Adapter and tighten the fixing screw.

F. MOUNTING CAMERA/CAMCORDER TO THE ATN NVM-14

1. Screw Camera Adapter into the front lens of a photographic camera with thread M52x0.75 or a video camera with thread M37x0.75 using the adapter ring.
2. Remove the rubber eyecup off the monocular.
3. Connect the adapter with the eyepiece and gently tighten the three fixing screws on the adapter.

G. MOUNTING THE ATN NVM-14 TO THE MIL-SPEC HEAD MOUNT AND MICH OR PASGT HELMET MOUNT

To mount the ATN NVM-14 to a head or helmet mount, perform the following:

1. Attach the adapter (Figure 3.8, A) to the rail (B) of ATN NVM-14. Push the clip (C) and slide the rail of the monocular into socket (D) of the adapter. Push the clip until the adapter locks the alignment groove in the monocular.
2. Align the adapter and the head or helmet mount. Slide the monocular rearwards until the alignment boss (Figure 3.9, A) aligns with the alignment groove (B) on the head or helmet mount. Push until the monocular locks into the head or helmet mount.
3. With this adapter you may see through the eyepiece using either the right or left eye. To change the viewing eye, loosen the nut (Figure 3.8, E) and rotate the socket (D) 180 degrees. Tighten the nut (E) anew.
4. Dual Bridge Adapter for the Mil-Spec headmount allows using the NVM14 as a pair of dual tube goggles with the Mil-Spec headmount, MICH helmet mount, or PASGT helmet mount.

H. MOUNTING 3X, 5X OR 8X LENS TO THE ATN NVM-14

The 3x lens is an afocal lens and screws onto the existing lens. The 5x and 8x lens require removing the 1x lens. Unscrew the objective lens and screw the 5x or 8x lens into the free place.

OPERATING PROCEDURES

4.1. OPERATING INSTRUCTIONS

A. BATTERY INSTALLATION

CAUTION:
To protect the image intensifier, keep the lens cap on the objective lens when the monocular is not in use or when checked out in daylight conditions.

Battery Type	Usage
CR123A	60 Hours (Gen. 2+) 50 Hours (Gen. 3 and 4)

The ATN NVM-14 operates with one CR123A battery. To install the battery, unscrew the battery cap (A). Then install the battery, observing the polarity indications on the battery compartment surface, and screw the battery cap back on.

B. MECHANICAL FUNCTIONS

The mechanical functions of the ATN NVM-14 allow for differences in the physical features of individual operators and provide for the system operation. These functions include the On/Off/On IR control, eye relief, diopter adjustment, objective lens focus, and IR illuminator focusing. These mechanical controls are identified in Figure 4.2.

Operation knob (A) has three positions:

• ON - turns the unit on without IR.
• OFF - turns the unit off.
• IR - turns the unit on with IR on.

To turn ON, push the knob in toward the eyepiece and rotate to ON, or to IR if IR illumination is needed.

You may adjust the unit diopter by rotating the eyepiece ring (B). The total dioptric range is covered in one-half revolution.

To make the unit focus appropriate for different distances, rotate the front lens ring (C). The total focusing range is covered in one-third ring revolution.

The ring (D) serves to fix the infinity position of the front lens focus.

C. INFRARED (IR) ILLUMINATOR OPERATIONS

CAUTION:
The IR illuminator is a light that is invisible to the unaided eye for use during conditions of extreme darkness. Please note that the light from the illuminator can be detected by others using night vision devices. NOTE:
The purpose of the illuminator is to view at close distances up to 3 meters when additional illumination is needed.

IR Illuminator (A) gets activated when the Operation knob (B) is rotated to the IR position. A red light appears in the eyepiece to indicate that the IR illuminator is operating.

OPERATIONAL DEFECTS

5.1. ZEROING OPERATIONAL DEFECTS

Operational defects relate to the reliability of the image intensifier and are an indication of instability. If identified, they are an immediate cause for rejecting the ATN NVM-14. They include shading, edge glow, flashing, flickering, and intermittent operation.

A. SHADING

If shading is persistent, you will not see a fully circular image. 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. Contact ATN or point of purchase for warranty or repair procedures.

NOTE:
Make sure the shading is not the result of improper exit pupil position.

B. EDGE GLOW

Edge glow is a bright area, sometimes sparkling, in the outer portion of the viewing area. To check for edge glow, block out all light by cupping a hand over the lens. If the image tube is displaying edge glow, the bright area will still show up. Contact ATN or point of purchase for warranty or repair procedures.

C. FLASHING, FLICKERING, OR INTERMITTENT OPERATION

The image may appear to flicker or flash. If there is more than one flicker, check for a loose battery adapter or weak battery. Contact ATN or point of purchase for warranty or repair procedures.

D. COSMETIC BLEMISHES

These are usually the result of manufacturing imperfections that do not affect image intensifier reliability and are not normally a cause for warranty or repair work. However, some types of blemishes can get worse over time and interfere with the usability of the device. If you believe a blemish is a cause for rejection, warranty, or repair, contact ATN or your point of purchase for warranty or repair procedures.

1. Bright Spots

A bright spot is a small, non-uniform, bright area that may flicker or appear constant. Not all bright spots make the ATN NVM-14 rejectable. Cup your hand over the lens to block out all light. If the bright spot remains, return the ATN NVM-14. Bright spots usually go away when the light is blocked out. Make sure any bright spot is not simply a bright area in the scene you are viewing. Bright spots are acceptable if they do not interfere with the ability to view the outside scene.

2. Emission Points

A steady or fluctuating pinpoint of bright light in the image area that does not go away when all light is blocked from the objective lens of the monocular. The position of an emission point within the image area does not move. Not all emission points make the ATN NVM-14 rejectable. Make sure any emission point is not simply a point light source in the scene you are viewing. Emission points are acceptable if they do not interfere with the usability of the device.

3. Black Spots

These are cosmetic blemishes in the image intensifier or dirt or debris between the lenses. Black spots are acceptable as long as they do not interfere with viewing the image. No action is required if this condition is present unless the spots interfere with the usability of the device.

4. Fixed-Pattern Noise

This is usually a cosmetic blemish characterized by a faint hexagonal honeycomb pattern throughout the viewing area that most often occurs at high light levels or when viewing very bright lights. This pattern can be seen in every image intensifier if the light level is high enough. This condition is acceptable as long as the pattern does not interfere with viewing the image and usability of the device.

5. Chicken Wire

An irregular pattern of dark thin lines in the field of view either throughout the image area or in parts of the image area. Under the worst-case condition, these lines will form hexagonal or square-wave shaped lines. This is typically viewed in high light conditions. No action is required if this condition is present unless it interferes with viewing the image and with the user's usability of the device.

MAINTENANCE

6.1. PREVENTIVE MAINTENANCE

A. PURPOSE OF PMCS

PMCS is performed daily when in use to be sure that the NVM-14 is ready at all times. Procedures listed in Table 6.1 are a systematic inspection of the NVM-14 that will enable you to discover defects that might cause the sight to fail on a mission.

B. FREQUENCY OF PERFORMING PMCS

1. Daily when the NVM-14 is in use.
2. When it is removed from the case for any reason.

Item No.	Location / Item to Check or Service	Procedure	Not Fully Mission Capable If
1	Maintenance records and carrying case	Open carrying case and inventory items. Check previously recorded faults on maintenance records.	Items are not current or a previously recorded fault is not corrected.
2	Monocular optical surfaces	Inspect lens for dirt, fingerprint residue, chips, or cracks. If necessary, clean and dry lens with water and lens tissue.	Scratches or chips hinder vision with the monocular turned on, or cracks are present.
3	External surfaces	Inspect for cracks or damage. Scratches and gouges are acceptable if operation is not affected.	Surfaces are cracked or damaged.
4	Battery adapter / compartment	Check to make sure the battery adapter is present. Remove the battery adapter and inspect for corrosion, moisture, corroded or defective contacts, and that the O-ring is present.	Adapter is missing, contacts are damaged or corroded, or the O-ring is missing.
5	Diopter adjustment ring	Rotate diopter adjustment ring to make sure the eyepiece is not too tight or too loose.	It binds, does not move freely, or is too loose.
6	Eyecup	Inspect for dirt, dust, and a cracked or torn cup. Inspect for a bent, broken, or improperly fitting eyecup. If necessary, clean with water.	Eyecup condition affects fit or use.
7	Objective lens focus ring	Rotate objective lens focus ring to ensure free movement.	It binds or does not move freely.
8	Lens cap	Inspect for a cracked, torn, or missing lens cap.	Lens cap is cracked, torn, or missing.
9	Viewed image	Refer to Section V - Operational Defects - to inspect for operational defects.	Flickering, flashing, edge glow, or shading is observed.
10	Strap	Inspect for cuts, tears, fraying, holes, cracks, or defective fasteners.	Damage causes straps to be unserviceable.
11	Socket	Inspect for dirt, dust, or corrosion. Insert the rail of ATN NVM-14 into socket to verify secure attachment of ATN NVM-14 to headmount. If necessary, clean socket with water.	Socket is damaged, latch will not work, or fit is too loose.
12	Socket release button	Press the socket-release button and check for free motion. Inspect for damage.	It binds or the slide mechanism is damaged or non-operational.
13	Headmount / helmet mount adapter	Inspect for dirt, dust, or corrosion. Insert adapter into headmount or helmet mount socket to verify secure attachment.	Adapter is damaged or will not latch securely.
14	Weapon mount	Inspect for dust, dirt, or corrosion.	Weapon mount is damaged, will not mount to the ATN NVM-14, or will not mount to the weapon rail.

CAUTION:
The demist coating on the demist shield can be damaged if cleaned while wet or cleaned with wet lens paper. Clean only when the demist shield is dry and only use dry lens paper.

Item No.	Location / Item to Check or Service	Procedure	Not Fully Mission Capable If
15	Demist shield	Inspect for dirt, dust, scratches, or damage. If necessary, clean when shield is dry with dry lens tissue only.	Damage or scratches hinder vision with ATN NVM-14 on.
16	Sacrificial window	Inspect for dirt, dust, scratches, or damage. If necessary, clean.	Damage or scratches hinder vision with ATN NVM-14 on.
17	3X / 5X / 8X magnifier	Inspect optical surface for dirt, dust, scratches, or cracks.	Damage or scratches hinder vision.
18	Carrying case	Remove all items and shake out loose dirt or foreign material. Inspect for tears, cuts, excess wear, or damage to mounting clips.	Carrying case is damaged or unserviceable.
19	Neck cord	Inspect for cuts, tears, excess wear, or damaged clips.	Neck cord is damaged or unserviceable.

6.2. TROUBLESHOOTING

Table 6.2 lists common malfunctions that you may find with your equipment. Perform the tests, inspections, and corrective actions in the order they appear in the table.

This table cannot list all the malfunctions that may occur, all the tests and inspections needed to find the fault, or all the corrective actions needed to correct the fault. If the equipment malfunction is not listed or actions listed do not correct the fault, notify ATN or your point of purchase.

Malfunction	Test or Inspection	Corrective Action
1. Monocular fails to activate	Press operation button. Check for defective, missing, or improperly installed batteries.	Press button one short push. Replace batteries or install correctly.
2. IR illuminator fails to activate	In a dark location with system turned on, activate IR and visually check IR illuminator operation; the scene should brighten.	If IR illuminator fails to activate, refer to higher level of maintenance.
3. IR indicator fails to activate	Visual.	Refer to higher level of maintenance.
4. Poor image quality	Check objective lens or eyepiece focus. Check for fogging or dirt on lens.	Refocus. Clean lens surface. If image quality is still poor, refer to higher level of maintenance.
5. Light visible around eyecup	Check eye-relief distance. Check eyecup for resiliency.	Readjust for proper eye-relief distance. If eyecup is defective, refer to higher level of maintenance.
6. Diopter adjustment cannot be made	Check to see if the diopter adjustment ring is bent or broken.	If damaged, refer to higher level of maintenance.
7. Battery adapter difficult to remove	Check for damaged battery adapter.	If damaged, refer to higher level of maintenance.
8. Head straps cannot be tightened	Check for defective buckles, fasteners, or straps.	If damaged, refer to higher level of maintenance.
9. Headmount or helmet mount socket does not catch	Check socket for dirt. Check socket for damage.	Clean socket. If damaged, return headmount or helmet mount to higher level of maintenance.
10. Helmet mount will not tighten to helmet	Inspect mounting hardware for damage.	If damaged, refer to higher level of maintenance.

6.3. CLEANING THE ATN NVM-14

CAUTION:
The ATN NVM-14 is a precision optical instrument and must be handled carefully at all times to prevent damage.
Do not scratch the external lens surfaces or touch them with your fingers.
Wiping demisting shield with lens paper while wet or with wet lens paper can damage the coating.

Clean monocular with water, if necessary, and dry thoroughly. Clean lenses with lens paper and water if necessary, except for the demisting shield.

6.4. TUBE MAINTENANCE / REPLACEMENT

1. Unscrew the eyepiece (E) from the case of the device (A).
2. Unscrew the lock ring (D) from the case of the device.
3. Extract the light guide (C) from the case of the device.
4. Extract the tube (B) to be replaced from the case of the device (A).
5. Introduce the new tube (B) into the case of the device (A).
6. Set the light guide (C) into place in the case.
7. Screw the lock ring (D) into the case of the device.
8. Screw the eyepiece (E) into the case of the device (A).

APPENDIX A

END ITEM COMPONENTS

Item	Description
1	ATN NVM-14 Monocular Assembly
2	Swing Arm Interface, Head/Helmet
3	Weapon Mount
4	Operator Manual
5	Demist Shield, Eyepiece
6	Soft Carrying Case
7	Sacrificial Window
8	Shoulder Strap
9	Head Mount Assembly
10	Brow Pad (Small)
11	Brow Pad (Large)
12	Lens Cap
13	Eye Cup Assembly
14	CR123A 3.0V DC Battery, Lithium

APPENDIX B

REPAIR PARTS LIST

Item	Description	Part No.
1	Battery Cap	NVM-138
2	Lithium Battery	CR123A
3	Purge Screw	7B315
4	Lens Cap	NVM-178
5	Sacrificial Window	NVM-032
6	Demist Shield	NVM-033
7	Battery Cap Retainer	NVM-156
8	Objective Lens Assembly	NVM-030
9	Eyepiece Lens Assembly	NVM-035
10	Head/Helmet Mount Adapter	NVM-042
11	Ship/Storage Case	7B257-2
12	Neck Cord	7B306
13	Soft Carry Case	7B262
14	Eyecup Assembly	7B422
15	Operator Manual	NVM-015
16	Shoulder Strap	7B267
17	Goggle Kit	7B268-A1
18	Dual Bridge	NVM-200
19	IR850	NVM-202
20	Picatinny Adapter	NVM-203
21	Camera Adapter	NVM-204
22	3X Lens	NVM-205
23	5X Lens	NVM-206
24	8X Lens	NVM-209
25	Lens Adapter	NVM-207
26	Universal Helmet mount	NVM-208