User Manual
Contents
1. C a uaa 2 3 Attaching Weapon Mount to Weapon 3 1 Attaching MUM to Weapon Mount 3 2 Attaching MUM2 to Head Helmet Mount Adapter AEDEM EUER 3 3 Attaching MUM to Head Mount 3 4 DL 123A Battery Installation 4 2 AA Battery Installation 221 Mechanical Functions Shading ern ret Edge Glow si Bright Spots and Emission Points 5 4 Fixed Pattern Noise 5 5 Chicken Wire eere ener 5 6 Neck pad Reinstallation Lacing the Sliding Bar Buckle Components of the End Item A 1 Repair Paris B 1 LIST OF TABLES Table 2 1 MUM Major Components 2 4 Table 4 1 Battery 4 1 Table ian 6 2 Table 6 2 Operator Troubleshooting for MUM 6 12 Table A 1 Components of the End ltem A 2 Table B 1 Repair Parts A 2 HOW TO USE THIS MANUAL Usage You must familiarize yourself with the entire manual before operating the equipment Read the complete maintenance task before performing maintenance and follow all WARNINGS CAUTIONS and NOTES Manual Overview The manual contains sections for Operating and Maintaining the Multi Use Minimonocular NVG2. 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 your maintainer Table 6 2 Operator Troubleshooting for MUM MALFUNCTION 1 Monocular fails to activate TEST OR INSPECTION Visual Check for defective missing or improperly installed batteries CORRECTIVE ACTION Turn switch to OFF position and then ON Replace batteries or install correctly 2 IR illuminator fails to activate In a dark location with system turned on activate IR Visually check IR illuminator operation scene should brighten If IR illuminator fails to activate refer to higher level maintenance 3 IR indicator fails to activate Visual Refer to higher level of maintenance 4 Afocal lens does not fit Check for o rings Check correct adapter Install proper o rings 2 each Use MUM adapter 6 12 Table 6 2 Operator Troubleshooting for MUM cont MALFUNCTION 5 Poor image quality TEST OR INSPECTION Check objective lens or eyepiece focus Check for fogging or dirt on lens CORRECTIVE ACTION Refocus Cle
3. Components of End Item are in Appendix A Repair Parts List is in Appendix B SECTION GENERAL INFORMATION Figure 1 1 Helmet Mounted MUM 1 1 1 1 GENERAL INFORMATION a Type of Manual Operator Including Repair Parts List b Model Numbers and Equipment Name NVM 000 A1 without I tube NVM 000 A2 MUM with I tube c Manufacturer Insight Technology Incorporated 9 Akira Way Londonderry NH 03053 d Purpose of Equipment To provide the soldier with the ability to observe at night under moonlight and starlight conditions The MUM can handheld head mounted helmet mounted or weapon mounted to enable walking driving weapon firing short range surveillance map reading vehicle maintenance underwater diving 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 one 1 year from the date of shipment If item is defective notify your Service Command Technical point of contact 1 3 TECHNICAL INFORMATION For technical information contact Insight Technology directly at 603 626 4800 or techinfo insight tek com or your Service Command point of contact 1 2 1 4 LIST OF ABBREVIATIONS Centimete
4. If you believe a blemish is cause for rejection record the specific nature of the problem on the maintenance forms and identify the position of the blemish by using the clock method and approximate distance from the center e g 5 00 toward the outside 2 30 near the center or 1 00 midway The following are cosmetic blemishes 1 Bright Spots A bright spot is a small non uniform bright area that may flicker or appear constant Figure 5 3 Not all bright spots make the MUM rejectable Cup your hand over the lens to block out all light If the bright spot remains return the MUM to the armorer 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 and the ability to perform the mission 2 Emission Points A steady or fluctuating pinpoint of bright light in the image area and does not go away when all light is blocked from the objective lens of the MUM Figure 5 3 The position of an emission point within the image area does not move Not all emission points make the MUM 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 ability to perform the mission 5 3 EMISSION POINT BRIGHT SPOT Figure 5 3 Bright Spots a
5. is is present missing 5 Before After Diopter Rotate diopter Binding not Adjustment adjustment ring to make moving freely Ring sure the eyepiece is not or too loose too tight or too loose Range is approximately Ya turn 6 4 Table 6 1 Preventive Maintenance Checks and Services for MUN cont Location Item Interval Item to Procedure Not No Check Service Fully Mission Capable If Before After Eyecup Inspect for dirt dust and cracked or torn cup Inspect for bent broken or improperly fitting eyecup If necessary clean with water 7 Before After Objective Lens Rotate objective lens focus Binding Focus Ring ring to ensure free or not movement range is approx moving 1 3 turn freely 8 Before After Lens Cap Inspect for cracked torn or missing lens cap 6 5 Table 6 1 Preventive Maintenance Checks and Services for MUN cont Item No Interval Before After Location ltem to Check Service On Off Switch Procedure Turn switch OFF to ON Each position should have a definite Not Fully Mission Capable If Switch has no definite stopping points or knob is fraying holes cracks or defective fasteners stopping point broken or Inspect for broken or missing missing knob 10 Before After Viewed Image Refer to Section V Flickering Operation Defects flashing edge to inspect for glow or shadin
6. will not mount to weapon mount rail 6 8 Location Table 6 1 Preventive Maintenance Checks and Services for MUN cont Item Interval Item to Procedure Not Fully No Check Service Mission Capable If 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 17 Before After Demist Shield Inspect for dirt dust Damage or scratches or damage scratches hinder If necessary clean vision with when shield is dry with MUM on dry lens tissue only 18 Before After Sacrificial Inspect for dirt dust Damage or Window scratches or damage scratches hinder If necessary clean vision with MUM on 6 9 Table 6 1 Preventive Maintenance Checks and Services for MUN cont Item No Interval Before After Location ltem to Check Service 3X Magnifier Procedure Inspect optical Surface for dirt dust scratches or cracks Not Fully Mission Capable If Damage or scratches hinder vision 20 Before After Carrying Case Remove all items and shake out loose dirt or foreign material Inspect for tears cuts excess wear or damage to mounting clips 21 Before After Shoulder Strap Inspect for cuts tears or excess wear or damaged clips 6 10 6 2 OPERATOR TROUBLESHOOTING Table
7. NVM MANUAL INSIGHT TECHNOLOGY INCORPORATED OPERATOR MANUAL FOR THE 9 Akira Way Londonderry NH 03053 Phone 603 626 4800 Fax 603 626 4888 Multi Use Minimonocular NVG MFG P N NVM 000 A1 A2 ITI Manual Revision 2 2 March 2005 SAFETY SUMMARY The MUM 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 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 To protect the image intensifier keep the lens cap on the objective lens when the monocular is not in use or when operated in daylight conditions Be careful not to touch the glass surfaces If you get fingerprints or contamination of the glass surfaces use lens paper to clean the sacrificial window If moisture is needed use your breath to mist the surface of the glass prior to wiping The IR illuminator is a light that is invisible to the unaided eye for use during conditions of extreme darkness However the light from the illuminator can be detected by a night vision equipped enemy It is recommended that the eyecup be replaced with the optional shuttered eye guard during weapon mounted use NOTES The is not a weapon sight however it can be used in conjunction with a collimated dot
8. SCRIPTION PART 1 Shipping Storage Case 7B 257 2 2 Weapon Mount Assembly NVM 024 3 Shuttered Eyeguard 4 Neck Cord 7B 306 5 Lens Tissue 7B 626 6 Headmount Adapter Assembly NVM 042 7 Eye Cup 7B 422 8 Shoulder Strap 7B 267 9 Lens Cap NVM 178 10 Sacrificial Window NVM 032 11 MUM Assembly NVM 001 A1 12 Demist Shield NVM 033 13 Headmount Assembly 7B 268 A1 14 AA Battery Alkaline 1 5v M30 044 15 Battery Sleeve Adapter NVM 038 16 Lithium Battery DL123 3v DL123ABK 17 Browpads Thin Medium Large 7B 280 435 436 18 Manual NVM MANUAL 19 Soft Carrying Case 7B 262 20 Battery Cap Assembly NVM 142 21 Purge Screw 7B 315 22 Battery Cap Retainer NVM 156 23 Objective Lens Assembly NVM 030 24 Eyepiece Lens Assembly NVM 035 25 Electronics Assembly NVM 020 26 I Tube Housing Assembly NVM 036 27 Light Pipe NVM 074 28 Pan head Screw 2 MHW83212 007B For Technical Information The is designed and produced by Insight Technology Inc 9 Akira Way Londonderry NH 03053 USA 603 626 4800 techinfo insight tek com
9. an lens surface If image quality is still poor refer to higher level of maintenance 6 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 7 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 6 13 Table 6 2 Operator Troubleshooting for MUM cont MALFUNCTION 8 Battery adapter difficult to remove TEST OR INSPECTION Visually inspect for the presence of an o ring Check for damaged battery adapter CORRECTIVE ACTION If o ring is missing replace If damaged refer to higher level of maintenance 9 Head straps cannot be tightened Check for defective buckles fasteners or straps If damaged refer to higher level of maintenance 10 Head mount or helmet mount socket and head helmet mount adapter latch does not catch Check socket or latch for dirt Check socket or latch for damage Clean socket and latch If damaged return both head mount or head helmet mount adapter to higher level of maintenance 11 Helmet mount will not tighten to helmet Inspect mounting hardware for damage If damaged refer to higher level of maintenance 6 14 6 3 CLEANING THE MUM CAUTIONS The MUM is a
10. ar locks into the weapon mount see Figure 3 2 3 1 Figure 3 2 Attaching MUM to Weapon Mount It is recommended that the eyecup be replaced with the optional shuttered eyeguard during weapon mounted use NOTE The MUM is not a weapon sight however it can be used in conjunction with a collimated dot sight or laser aiming device 3 2 3 1 2 Mounting the MUM to a Head Helmet Mount Adapter To mount the MUM to a head helmet mount perform the following 1 Hold the head helmet mount adapter by the large knurled knob with the small rotational knob facing forward 2 Rotate the knurled knob and slide the mount onto the center of the monocular rail 3 Ensure that the mount is fully locked into the recoil stop on the monocular Knurled Knob Rotational Knob Figure 3 3 Attaching to Head Helmet Mount Adapter 3 3 3 1 3 Attaching the MUM with Head Helmet Mount Adapter to the Head Mount Align the head mount and the head helmet mount adapter Move the monocular rearwards until the Alignment Boss meets the Alignment Groove on the head mount Push until the monocular locks into the head mount Alignment Groove Figure 3 4 Attaching MUM to Head Mount 3 4 SECTION IV OPERATING PROCEDURES 4 1 OPERATING INSTRUCTIONS 4 1 BATTERY INSTALLATION The MUM operates with one DL 123A battery or one AA battery when using the battery adapter Table 4 1 Battery Life Estimated Batte
11. attaches to the MUM prior to submerging to protect it during diving operations Flip up Helmet Mount Provides mount interface for the MUM to a range of ballistic helmets Dual Carriage Mount Adapter that allows two MUM s to be attached a binocular configuration 3x or 5x Afocal Lens Attaches to the MUM for enhanced range performance 3x Lens Custom Order Attaches to the MUM for enhanced range performance Infrared Flood Spot Focusing lens for the extended source IR LED to narrow or widen the illumination beam Compass Projects magnetic azimuth orientation into the operator s field of view when using the MUM Shipping Storage Case A hard plastic case designed to protect all MUM components during shipping storage 2 7 Shuttered Eyeguard Used to maintain display backlight security 2 8 SECTION III MOUNTING PROCEDURES 3 1 MOUNTING PROCEDURES 3 1 1 Mounting the MUM to the weapon Loosen the clamping knob on the weapon mount Position the monocular weapon mount on to the weapon s mounting rail Adjust the fore aft position of the monocular as necessary by loosening the clamping knob Position the weapon mount on the rail and tighten by turning the clamping knob see Figure 3 1 Figure 3 1 Attaching Weapon Mount to Weapon 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 monocul
12. djusting the head mount it is possible for a strap to slip out of a slide fastener Perform the following procedure to replace the strap and sliding bar buckle Thread the strap from the inside of the buckle over the moveable sliding bar see Figure 6 2 Thread the strap back through the buckle but this time under the sliding bar and over the serrated part of the buckle Figure 6 2 Lacing the Sliding Bar Buckle 6 17 This page intentionally left blank 6 18 APPENDIX A END ITEM COMPONENTS OS o gt 12 13 xe 3 Figure A 1 Components of the End Item Table A 1 Components of the End ltem ITEM DESCRIPTION PART NO 1 Weapon Mount Assembly NVM 024 2 Neck Cord 7B 306 3 Headmount Adapter Assembly NVM 042 4 Eye Cup 7B 422 5 Shoulder Strap 7B 267 6 Lens Cap NVM 178 T Sacrificial Window NVM 032 8 Assembly NVM 001 A1 9 Demist Shield NVM 033 10 Headmount Assembly 7B 268 A1 11 Lens Tissue 7B 626 12 AA Battery Alkaline 1 5v M30 044 13 Battery Sleeve Adapter NVM 038 14 Lithium Battery DL123 3v DL123A 15 Browpads Thin Medium Large 7B 280 7B 435 7B 436 16 Operator Manual NVM MANUAL 17 Soft Carrying Case 7B 262 APPENDIX B REPAIR PARTS LIST Figure B 1 Repair Parts B 1 Table B 1 Repair Parts List ITEM DE
13. g operational defects is observed 11 Before After Strap Pads Inspect for cuts tears Damage causes straps or pads to be unserviceable 6 6 Table 6 1 Preventive Maintenance Checks and Services for MUN cont Item No Interval Before After Location ltem to Check Service Socket Procedure Inspect for dirt dust or corrosion Insert latch into socket to verify secure attachment of MUN to head mount If necessary clean socket with water Not Fully Mission Capable If Damaged latch won t work or too loose 13 Before After For and Aft Adjustments Press the socket release button and check for free motion Inspect for damage Binding damaged or non operational slide mechanism 6 7 Table 6 1 Preventive Maintenance Checks and Services for MUN cont Item No Interval Before After Location Item to Check Service Straps Procedure Inspect for cuts tears fraying holes cracks or defective fasteners Not Fully Mission Capable If Damage causes straps to be unserviceable 15 Before After Head mount Inspect for dirt dust Damaged will not Helmet Mount or corrosion Insert latch securely Adapter into head helmet mount socket to verify secure attachment 16 Before After Small Arms Inspect for dust dirt Damaged will not Mount Adapter orcorrosion mount to MUM2 or
14. indow supplied to protect the objective lens during operation in adverse conditions This o ring sealed window also doubles as the objective lens dive window 8 MUM Assembly The monocular night vision device with unity magnification 2 5 9 Demist Shield Used to prevent eyepiece lenses from becoming fogged This o ring sealed window also doubles as the objective lens dive window 10 Headmount Assembly Adjustable universal assembly that secures the to the operator s head providing hands free operation 11 Lens Tissue Lens Tissue cleans the lenses during maintenance 12 Battery AA Alkaline 1 5v A single AA alkaline battery is used to power the unit 13 Battery Sleeve Adapter Allows the to accept a single standard AA alkaline battery used to power the unit instead of the Lithium Battery 14 Battery DL123A Lithium 3v A single 123A lithium battery is used to power the unit 15 Brow pads Thin Medium or Large Varying thickness brow pads are provided to allow the head mount assembly to adapt to differing head sizes 16 Operator Manual Provides equipment description use of operator controls and preventative maintenance 17 Soft Carrying Case A protective nylon bag used for storing the and accessories 2 6 2 3 2 OPTIONAL COMPONENTS not shown Camera Camcorder Adapter This adapter attaches to the eyepiece for collection of imagery from the MUM Dive Window This window
15. ion exist Long exposure to high levels of external light source for extended periods of time can significantly reduce the service life of the image intensifier tube and permanently degrade the equipment This page intentionally left blank TABLE OF CONTENTS SAFETY SUMMARY iii a EQUIPMENT LIMITATIONS esee TABLE OF i LIST OF FIGURES li LIST OF TABLES HOW TO USE THIS iv SECTION l i teer rete iens 1 1 GENERAL INFORMATION 21 1 SECTION IL 2 1 EQUIPMENT DESCRIPTION 2 1 SECTION III i 3 1 MOUNTING PROCEDURES 3 1 SECTION IV ii n OPERATING PROCEDURES 24 1 SECTION 2557 OPERATIONAL DEFECTS 2254 SECTION 6 1 MAINTENANCE 2 671 APPENDIX A eret tette cene A 1 END ITEM COMPONENTS in A 1 APPENDIX B 1 REPAIR PARTS LIST B 1 Figure 1 1 Figure 2 1 Figure 2 2 Figure 3 1 Figure 3 2 Figure 3 3 Figure 3 4 Figure 4 1 Figure 4 2 Figure 4 3 Figure 5 1 Figure 5 2 Figure 5 3 Figure 5 4 Figure 5 5 Figure 6 1 Figure 6 2 Figure A 1 Figure B 1 LIST OF FIGURES Helmet Mounted MUM 14 Weight Dimensions and Performance 2 2
16. nd Emission Points 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 operator s ability to perform the mission 5 4 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 See Figure 5 4 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 interfere with the ability to perform the mission Figure 5 4 Fixed Pattern Noise 5 5 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 See Figure 5 5 Under the worst case condition these lines will form hexagonal or square wave shaped lines No action is required if this condition is present unless it interferes with viewing the image and interferes with the operator s ability to perform the mission Figure 5 5 Chicken Wire 5 6 SECTION VI MAINTENANCE 6 1 6 1 PREVENTIVE MAINTENANCE The user s environment will determine the interval level i e deployment mission u
17. nents 3 Table 2 1 MUM Major Components ITEM DESCRIPTION Kit Components 1 Weapon Mount Assembly 2 Neck Cord 3 Headmount Adapter Assembly 4 Eye Cup 5 Shoulder Strap 6 Lens Cap 7 Sacrificial Window 8 Assembly 9 Demist Shield 10 Headmount Assembly 11 Lens Tissue 12 AA Battery Alkaline 1 5v 13 Battery Sleeve Adapter 14 Lithium Battery DL123 3v 15 Browpads Thin Medium Large 16 Operator Manual 17 Soft Carrying Case Optional Components Camera Camcorder Adapter Dive Window Flip up Helmet Mount Dual Carriage Mount 3x or 5xAfocal Lens 3x Lens Custom Order Infrared Flood Spot Compass Shipping Storage Case optional Shuttered Eyeguard optional 2 3 1 MAJOR COMPONENTS 1 Weapon Mount Assembly A small arms adapter that allows the MUM to be mounted on a weapon 2 Neck Cord The neck cord is worn around the neck and also tethers the lens cap to the MUM 3 Headmount Adapter Assembly This item attaches the MUM to the head mount or helmet mount 4 Eye Cup A rubber cup used for operator comfort to protect eyepiece and for nighttime back light security 5 Shoulder Strap Allows the carrying bag to be slung across the shoulder for ease of carrying 6 Lens Cap A cap used to protect the lens and for testing the unit in daylight 7 Sacrificial Window A replaceable w
18. ns 4 3 4 3 ON OFF IR POWER SWITCH This three position switch performs as follows OFF System is off Push turn the knob the position to activate the monocular Push turn the knob counterclockwise to activate the infrared illuminator Low battery Indicator A yellow indicator light is visible through the eyepiece located just outside the intensified field of view When illuminated it indicates a low battery condition Objective Lens Focus The objective lens can be adjusted for the sharpest image of the viewed object Turn the objective lens counterclockwise to adjust towards infinity Turn clockwise to bring the focus in for close up objects Diopter Adjustment Ring The diopter adjustment ring is used to focus the eyepiece for use without the need for glasses NOTE To move the power switch from the OFF position you must push in on the switch while turning it 4 4 4 4 INFRARED IR ILLIUMINATOR OPERATIONS Push and turn the On Off On IR switch knob to the On IR position observing that a red light appears in the eyepiece to indicate that the IR illuminator is operating The IR illuminator is a light that is invisible to the unaided eye for use during conditions of extreme darkness However the light from the illuminator can be detected by the enemy using night vision devices NOTE The purpose of the illuminator is for viewing at close distance up to 3 me
19. 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 a 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 demisting shield 6 4 HEADMOUNT MAINTENANCE 6 4 a Brow pad Replacement Replace the brow pads when cracked torn or contaminated Perform the following procedure to remove and replace the brow pads Firmly grasp the head mount and remove the old brow pad Gently press on the new brow pad Lightly smooth out any wrinkles in the new brow pad 6 4 b Neck pad Reinstallation During operation of the monocular it is possible for the neck pad to become separated from its position on the headband Perform the following procedures to reinstall the neck pad 1 Lift the upper headband strap retention tab see Figure 6 1 allowing the neck pad strap to be inserted underneath 6 15 2 Slip the neck pad strap all the way under the upper strap retention tab and then pull the lower part of the neck pad strap under the lower strap retention tab 3 Repeat steps 1 and 2 for the other side of the headband and neck pad if necessary Figure 6 1 Neckpad Reinstallation 6 16 6 4 c Lacing the Sliding Bar Buckle 1 While wearing and or a
20. rs Battery Grams Illuminator Inches Infrared Meters Millimeters Multi Use Minimonocular NVG Night Vision Goggles ounces 1 3 This page intentionally left blank 1 4 SECTION II EQUIPMENT DESCRIPTION 2 1 SYSTEM DESCRIPTION The MUM is a hand held head mounted helmet mounted or weapon mounted night vision system that enables walking driving weapon firing short range surveillance map reading vehicle maintenance underwater diving 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 2 1 2 2 WEIGHT DIMENSIONS AND PERFORMANCE Figure 2 1 Weight Dimensions and Performance WEIGHT AND DIMENSIONS Weight with mounting hardware 265g Length 10 4 cm Width 4 4 cm Height 6 4 cm PERFORMANCE Magnification 1x f Number 1 2 O vari 2 Field of View 40 2 with 18 mm tube format Focus Range 25cm 9 8in to infinity Eyepiece Diopter Adj 6 to 4 Eye Relief 27mm Voltage 3 0 VDC Power Requirements 1 DL123A or 1 AA Waterproof 20 meters 1 DL123A battery gt 40 hours 1 AA battery gt 20 hours 2 3 DESCRIPTION OF MAJOR COMPONENTS gu I 13 a w Figure 2 2 MUM Major Compo
21. ry Life DL 123A gt 40 Hours Standard AA gt 20 Hours To protect the image intensifier keep the lens cap on the objective lens when the monocular is not in use or when operated in daylight conditions NOTE At operating temperatures below 20 C 4 F alkaline batteries are not recommended as operating life will be severely reduced Lithium iron disulfide batteries or equivalent should be used below 20 C 4 F 4 4 4 1 1 Install DL 123A battery as follows Unscrew the battery cap A and insert the battery B observing the polarity as indicated Replace the battery cap A and screw cap hand tight Figure 4 1 DL 123A Battery Installation 4 1 2 Install standard AA batteries as follows Unscrew the battery cap A and screw in the battery adapter C Insert AA battery B observing the polarity as indicated Replace the battery cap and screw cap hand tight Co A B c Figure 4 2 AA Battery Installation 4 2 4 2 MECHANICAL FUNCTIONS The mechanical functions of the MUM allow for differences in the physical features of individual operators and are used to operate the system These functions include the On Off On IR control eye relief see Section Mounting Procedures Headmount Adjustments diopter adjustment and objective lens focus On Off Battery IR on Control Housing S Diopter Adjustment Ring Objective Lens Focus Ring Figure 4 3 Mechanical Functio
22. se for the preventive maintenance steps listed in the table below Table 6 1 Preventive Maintenance Checks and Services for Item Interval Item to Procedure Not Fully Mission No Check Service Capable If Before Maintenance Open carrying case Not Current inventory items and check records for 180 day services completed Previously recorded Fault not corrected faults on maintenance records 6 2 Table 6 1 Preventive Maintenance Checks and Services for MUN cont Item No Interval Location ltem to Check Service MONOCULAR Procedure Not Fully Mission Capable If 2 Before After Optical Inspect lens for dirt Scratches or Surfaces fingerprint residue chips hinder chips or cracks If vision with necessary clean and monocular dry lens with water turned on or if and lens tissue cracks are present 3 Before After External Inspect for cracks or Cracked or Surfaces damage Scratches damaged and gouges are OK if operation is not affected 6 3 Table 6 1 Preventive Maintenance Checks and Services for MUN cont Location Item Interval Item to Procedure Not Fully No Check Service Mission Capable If Before After Battery Check to make sure Adapter is Adapter battery adapter is missing Compartment present Inspect for contacts corrosion moisture damaged or corroded or defective corroded or contacts and that o ring o ring
23. sight or laser aiming device When utilizing the MUM2 for driving purposes the goggles may not be used in the hand held mode The goggles must be worn on the head or helmet mounted position At operating temperatures below 20 C 4 F alkaline batteries are not recommended as operating life will be severely reduced Lithium iron disulfide 1 5V AA batteries 123A 3 0VDC Lithium or equivalent should be used below 20 C 4 F The purpose of the illuminator is for viewing at close distance up to 3 meters when additional illumination is needed To move the power switch from the OFF position you must push in the switch and then turn it Make sure that shading is not the result of improper eye relief adjustment EQUIPMENT LIMITATIONS To avoid physical and equipment damage when using the MUM carefully read and understand the following safety precautions The equipment requires some night light moonlight starlight etc to operate The level of performance depends upon the level of light Night light is reduced by passing cloud cover while operating under trees in building shadows etc The equipment is less effective viewing into shadows and other darkened areas The equipment is less effective through rain fog sleet snow or smoke The equipment will not see through dense smoke Adjust vehicular speed to prevent overdriving the range of view when conditions of possible reduction or loss of vis
24. ters when additional illumination is needed 4 5 4 5 SACRIFICAIL WINDOW INSTALLATION Perform the following procedure to install the sacrificial window onto the objective lens 1 Remove the lens cap from the objective lens of the monocular 2 Hold the sacrificial window by the notched end and thread it clockwise into the end of the objective lens Do not over tighten 3 Replace the lens cap onto the objective lens over the sacrificial window CAUTION Be careful not to touch the glass surfaces If fingerprints or contamination are on the glass surfaces use lens paper to clean the sacrificial window If moisture is needed use your breath to mist the surface of the glass prior to wiping 4 6 DEMIST SHIELD INSTALLATION Perform the following procedure to install the sacrificial window onto the objective lens 1 Carefully remove the eyecup With the threaded end of the demist shield towards the eyepiece thread the shield on by turning in a clockwise direction Do not over tighten and replace the eyecup 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 with dry lens paper 4 6 SECTION V OPERATIONAL DEFECTS 5 1 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 MUM They incl
25. ude shading edge glow flashing flickering and intermittent operation 5 1 a Shading If shading is persistent you will not see a fully circular image Figure 5 1 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 Return the to the armorer SHADING Figure 5 1 Shading 5 1 NOTE Make sure the shading is not the result of improper eye relief adjustment 5 1 b Edge Glow Edge glow is a bright area sometimes sparkling in the outer portion of the viewing area see Figure 5 2 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 Return the to the armorer Pax EDGE GLOW c IS Figure 5 2 Edge Glow 5 1 c Flashing Flickering or Intermittent Operation The image may appear to flicker or flash If there is more than one flicker check for loose battery adapter or weak battery Return the to the armorer 5 2 5 1 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 rejecting an some types of blemishes can get worse over time and interfere with the ability to perform the mission
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