Newcon Optik NVS 6 User Manual

NVS 6  
PILOT NIGHT VISION  
GOGGLES  
MAINTENANCE AND OPERATION  
MANUAL  
In USA: 3310 Prospect Ave. Cleveland, OH 44115  
In Canada: 1183 Finch Ave. W., Suite 302, Toronto, ON M3J 2G2 Canada  
Tel: (416) 663-6963 Fax: (416) 663-9065  
NVS 6  
MANUAL  
IMPORTANT INFORMATION  
Read prior to activation  
You have just purchased a complicated electronic device. To operate it  
properly, please read this manual carefully. Here are some common  
precautions that must be noted.  
NEVER disassemble the unit. This device contains high voltage, which may  
be hazardous to your health!  
NEVER expose the opened objective lens of an active unit in daylight. At  
daytime objective lens must be covered by caps. There is a tiny hole in the  
cap to provide enough light for daytime testing. It is allowed to turn on the  
unit at daytime, but caps must cover the lenses.  
NEVER aim active unit at intense light sources  
(i.e. lights, headlamp, campfires, the moon, etc.)  
NEVER reverse the polarity of a battery  
ALWAYS remove batteries when not in use for a long period  
ALWAYS keep the objective lenses covered when not in use  
ALWAYS store in a warm dry place when not in use  
RECORD OF REVISIONS  
Pages 1/2  
NVS 6  
MANUAL  
RECORD OF REVISIONS  
Page  
Rev. Section,  
No. Sub-Section,  
Subject  
Authorizing Transmittal letter  
Document Reference No. Signed Date  
Revi-  
sed  
Dele-  
ted  
Added  
No.  
and date  
by  
Page 2  
NVS 6  
MANUAL  
LIST OF EFFECTIVE PAGES  
Section,  
Sub-Section,  
Subject  
Section,  
Sub-Section,  
Subject  
Page  
Date  
Page  
Date  
Title Page  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
41  
42  
43  
44  
45  
46  
47  
48  
49  
50  
Record of  
Revisions  
1/2  
List of Effective  
Pages  
1/2  
Table of Contents 1/2  
General  
1
2
Main Data  
Standard Set  
3
4
5
6
Operation Proce-  
dure  
Safety Precautions  
Design of Unit and  
Its Components  
7
8
Operational  
Status Check  
Trouble Shooting  
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
Maintenance  
Practices  
Preparation for  
Operation  
Storage and  
Shipment  
LIST OF EFFECTIVE PAGES  
Pages 1/2  
NVS 6  
MANUAL  
TABLE OF CONTENTS  
Page  
1 General........................................................................................................ 1  
2 Main Data .................................................................................................... 3  
3 Standard Set................................................................................................ 5  
4 Safety Precautions....................................................................................... 7  
5 Design of Unit and Its Components............................................................. 8  
6 Preparation for Operation .......................................................................... 19  
6.1 Preparation of Helmet for Mounting Night-Vision Goggles...................... 19  
6.2 Individual Adjustment and Fitting............................................................. 22  
6.3 Arrangement of Night-Vision Goggles on Helicopter............................... 32  
7 Operation Procedure ................................................................................. 36  
8 Operational Status Check.......................................................................... 38  
9 Trouble Shooting ....................................................................................... 40  
10 Maintenance Practices ............................................................................ 44  
11 Storage and Shipment............................................................................. 49  
APPENDIX A ................................................................................................. 51  
APPENDIX B ................................................................................................. 52  
CONTENTS  
Pages 1/2  
NVS 6  
MANUAL  
1 General  
1.1 The NVS 6, helicopter night-vision goggles, have been  
designed for use by the helicopter crewmembers during execution of  
flights at night.  
Note – The helicopter cockpit should be tailored for the use of the  
night-vision goggles. Accounting for the spectral content of the light  
equipment radiation, color of the cockpit interior surfaces, and the like.  
1.2 The NVS 6 provides napping off the earth while piloting the  
helicopter at low altitudes, at takeoff, hovering and landing, including  
landing on unprepared and non-illuminated landing sites.  
1.3 When using the NVS 6, the pilot can take the readings of the  
instruments by looking at the instrument panel in the downward direction  
or sideways past the eyepieces.  
1.4 The NVS 6 operates within the ambient temperature range of  
minus 40 to +40oC.  
1.5 The power supply to the NVS 6 is powered by the helicopter  
electrical system of 27V, via the voltage converter or from the  
independent power source (IPS). The IPS is built-in to the goggles and  
consisting of two batteries of type size AA R6 1.5V or from rechargeable  
batteries of the same type.  
Note – The IPS (independent power source) is used when the  
aircraft electrical power is lost or the helicopter power supply has failed.  
1.6 The NVS 6 shall be used under the following conditions:  
– When the natural night illumination intensity is within 5·10-3 to 1 lx  
and the meteorological visibility is 1 to 10 km  
– At a flight altitude of 20 to 200 m;  
– At a flight speed of up to 120 km/h.  
Page 1  
NVS 6  
MANUAL  
1.7 The trouble-free operation of the NVS 6, within the assigned  
service life, is ensured through its correct use, careful handling and well-  
timed maintenance.  
1.8 When operating the unit or placing it in storage, keep it clean  
and avoid touching the external optical surfaces of the lenses and  
eyepieces with fingers. Protect the unit against impact or dropping which  
may cause damage and defects to the unit and render it inoperable.  
1.9 Before using the NVS 6, carefully read this Manual.  
1.10 In the course of the service of the unit, enter the information  
pertaining to its operational status, maintenance, storage and repair in the  
Log Book.  
Page 2  
NVS 6  
MANUAL  
2 MAIN DATA  
2.1 Specifications of the NVS 6 are presented in Table 1.  
Table 1  
Specification  
1 Field of view (FOV), minimum  
Characteristic  
40 deg  
2 Magnifying power  
1 X  
3 Resolving power limit of the image intensifier  
tube, as measured in the center of FOV, minimum  
50 lines per mm  
4 Dioptric setting range of eyepieces, minimum  
5 Interpupilary distance range  
6 Lens focusing distance range  
7 Power supply:  
-6/+2 D  
52 to 72.7 mm  
0.25 m to infinity  
– From helicopter DC electrical system via a  
voltage converter  
24.0 to 29.4 V  
– From two batteries of type size AA R6 1.5 V 2.2 to 3.2 V  
or rechargeable batteries  
8 Current consumed with the unit powered from  
helicopter electrical system, maximum  
100 mA  
9 Power consumed with the unit powered from  
helicopter electrical system, maximum  
3 W  
10 Continuous operation time of the unit powered 3 h  
from the built-in independent power source without  
changing the batteries (within the entire operating  
temperature range), minimum  
Page 3  
NVS 6  
MANUAL  
Table 1, cont'd  
Specification  
Characteristic  
11 Continuous operation time followed by an  
interval of not less than 30 min, minimum  
3 h  
12 Unit deployment time (getting the unit ready 5 min  
for use), maximum  
13 Unit stowing time (packing the unit in the  
case), maximum  
5 min  
14 Mass, maximum:  
– Night-vision goggles (without mount)  
– Voltage converter with cable  
0.59 kg  
0.3 kg  
15 Night-vision goggles overall dimensions,  
maximum  
108x151.5x122 mm  
Page 4  
NVS 6  
MANUAL  
3 STANDARD SET  
3.1 The standard set of the NVS 6 shall be consistent with Table 2  
and Fig. 3.1.  
Table 2  
Designation  
Nomenclature  
Assemblies  
Qty  
Remarks  
201211.010  
Night-vision goggles  
Voltage converter  
Set of Spare Parts  
Dehydrator cartridge  
1
1
433739.003  
279376.002  
1
Optional  
Set of Tools and Accessories  
Watchmaker’s  
screwdriver MT-992, size  
1.5  
1
Optional  
754421.001  
Test pattern  
1
4
Optional  
Optional  
Batteries of type size  
AA R6 1.5 V  
304134.001  
745159.003  
745159.001  
305259.001  
741112.013  
Mount  
1
1
1
1
3
Casing  
Clamp  
Counterweight  
Cloth  
Optional  
Packaging  
Soft Padded Case  
325371.009  
1
Page 5  
NVS 6  
MANUAL  
8
7
12  
1
10  
9
2
11  
6
3
4
5
7
Mount  
Casing  
Clamp  
1 Night-Vision Goggles  
2 Voltage Converter  
3 Dehydrator Cartridge  
4 Screwdriver  
8
9
10 Counterweight  
11 Cloth  
5 Test Pattern  
12 Case  
6 Batteries  
NVS 6 Standard Set  
Figure 3.1  
Page 6  
NVS 6  
MANUAL  
4 SAFETY PRECAUTIONS  
4.1 The NVS 6 is constructed so as to provide pilot’s safety during  
operation.  
4.2 In case of emergency the helicopter crewmembers shall take  
off (throw off) the NVS 6 night-vision goggles before evacuating the  
helicopter.  
To ensure successful removal of the unit, the crewmember using  
the NVS 6 in flight should be trained to quickly execute the night-vision  
goggles. In an emergency evacuation from the helicopter expedient  
removal is essential for his/her safety.  
4.3 Care should be taken to protect the unit from direct exposure of  
its lenses to high-level optical radiation.  
CAUTION: NEVER SWITCH ON THE UNIT DURING DAY LIGHT  
UNLESS PROTECTIVE CAPS ARE INSTALLED ON THE UNIT  
LENSES. DO NOT KEEP THE UNIT IN THE BRIGHT LIGHT SOURCES  
FOR LONG PERIODS OF TIME.  
Page 7  
NVS 6  
MANUAL  
5 DESIGN OF UNIT AND ITS COMPONENTS  
5.1 The NVS 6 is essentially a passive-type optoelectronic night-  
vision device whose principle of operation is based on the intensification  
of image brightness of objects being viewed with the aid of image-  
intensifier tubes.  
5.2 The NVS 6 design employs a binocular pattern, i.e. it consists  
of two identical optoelectronic channels (of monocular type) which afford  
stereoscopic vision to create comfortable conditions for napping off the  
earth, thus enabling the pilot to evaluate the space depth and ensure  
higher night flight safety.  
5.3 The general view of the NVS 6 is illustrated in Fig. 5.1.  
5.3.1 Lenses (1) may be focused either relative to distant objects  
located in the space outside the cockpit, or relative to the objects located  
close to the helicopter. The focus is adjusted by rotating the lenses.  
5.3.2 The dioptric focusing of eyepieces (2) is carried out  
individually for each sight channel of the unit by rotating eyepieces with  
the aid of focusing rings (3).  
5.3.3 The independent power source (IPS) is arranged inside  
guide (4), which is closed with cap-switch (5).  
5.3.4 The NVS 6 is installed onto the pilot’s helmet by attachment of  
fixing assembly (6) of the unit to mount (7), which is then secured to  
helmet casing (8).  
The fixing assembly makes it possible to perform individual  
adjustment, so as to provide the most comfortable position of the goggles  
mounted on the helmet relative to the pilot’s eyes. This feature enables  
the pilot to move the goggles away from the eyes, tilt the optical axes of  
monocular pair and displace them upwards and downwards.  
Page 8  
NVS 6  
MANUAL  
7
18  
20  
19  
6
4
17  
13  
8
16  
9
1
10  
12  
14  
Lens  
2
3
5
15  
11  
1
2
3
4
5
6
7
8
9
11 Cable  
12 Cap  
Eyepiece  
Ring  
13 Dehydrator Cartridge  
14 Sight Glass  
15 Cable  
Guide  
Cap-Switch  
Fixing Assembly  
Mount  
16 Screw  
17 Visor Guard  
18 Slot  
Casing  
Counterweight  
19 Cross-Shaped Knob  
20 Screw  
10 LVC (Low-Voltage Converter)  
NVS 6  
Figure 5.1  
Page 9  
NVS 6  
MANUAL  
For balancing out the overturning momentum produced by the unit  
in the operating position, use is made of counterweight (9) secured on the  
rear portion of the helmet.  
The helmet should be tailored for employment of the night-vision  
goggles. For this purpose, the standard casing should be replaced and  
the strip of the sticking fastener should be bonded to the helmet rear  
surface for attachment of the counterweight (the necessary appliances  
are included in the set of spare parts).  
Note: other helmets may require different mounting mechanisms  
5.3.5 Caps (12) are intended to safeguard the image intensifier  
tubes against exposure to light and protect the optical components of  
the lenses from mechanical damage.  
The caps are provided with holes for checking the night-vision  
goggles for serviceability at an illumination intensity of more than 1 lx (in  
conditions of day light and dusk), as well as with retainers (two spring-  
loaded projections located on the cap sides) used for reliable locking of  
the cap in the mount of lens (1).  
Small projections in the sides of the cap are provided, with holes for  
joining the caps, in pairs by means of a fishing line. This will minimize  
their inadvertent loss in service.  
5.3.6 The moisture-resistance of the unit is ensured with the use of  
annular rubber seals and dehydrator cartridges (13). These are intended  
to absorb moisture in case it gets into the interior space of the monocular  
pair. The dehydrator cartridge is filled with silica gel that is bluish in color  
when it is not saturated. As the silica gel gets saturated, it turns rose-pale  
or off-white. The external condition of the silica gel is monitored through  
sight glass (14).  
5.4 The NVS 6 standard set comprises the night-vision goggles, the  
voltage converter and the single set of spare parts. (Optional)  
Page 10  
NVS 6  
MANUAL  
16  
13  
14  
22  
17  
15  
21  
18  
9
3
1 10  
4
В
В
Б
Б
А
А
2
5
7 8  
6 10 12 19  
20  
9  
10  
1
1 Guide  
2 Guide  
3 RH Side Monocular  
4 LH Side Monocular  
5 Lens  
6 Eyepiece  
7 Image-Intensifier Tube  
8 Barrel  
9
Screw  
16 Cable  
17 Lever  
18 Knob  
19 Screw  
20 Plate  
10 Button  
11 Batteries  
12 Cap-switch  
13 Fixing Assembly  
14 Retainer  
15 Button  
21 Retainer  
22 Retainer  
Night-Vision Goggles  
Figure 5.2  
Page 11  
NVS 6  
MANUAL  
Physically, the night-vision goggles are made in the form of two  
identical electro-optical channels – monocular (3) and monocular (4) –  
which are mechanically linked with each other with the aid of guide (1)  
and guide (2). Each of the monocular pair incorporates lens (5), eyepiece  
(6), image-intensifier tube (7) and barrel (8).  
RH side monocular (3) that allows the pilot to carry out observation  
with the right eye is rigidly fastened to guide (2), while LH side monocular (4)  
that permits observation with the left eye is of a movable design and may  
be displaced to adjust the eyepieces of the night-vision goggles to suit the  
pilot’s eyes.  
To adjust the night-vision goggles interpupilary distance, depress  
button (10) and displace monocular (4) along guide (2) to set it to the  
desired position. These done, release the button to fix monocular (4) in  
the selected position.  
Batteries (11) are installed inside guide (2) and closed with cap-  
switch (12).  
The night-vision goggles are attached to the helmet with the aid of  
the guides of fixing assembly (13) and those of the helmet mount. The  
fixing assembly is retained in the fixed position in the helmet mount by  
means of retainer (14).  
The transfer of the night-vision goggles from the stowed position to  
the operating one, in which they are fitted on the helmet, is accomplished  
by depressing button (15) with the left hand and lowering the goggles until  
they are retained in the locked position. The fixing assembly is provided  
with a connector, for connecting the mating connector plug of cable (16),  
intended to feed power to the night-vision goggles via the voltage  
converter.  
Upon termination of use, the night-vision goggles are easily  
removed complete with cable (16) from the mount of the helmet by  
pressing down lever (17).  
Page 12  
NVS 6  
MANUAL  
Knob (18) provides a means of individual adjustment of the  
monocular position (eye relief, tilt of the monocular pair optical axes, and  
displacement of the monocular pair in the upward and downward  
directions).  
The monocular pair is locked in the selected position by moving the  
knob down as far as it will go. This securely locks the monocular pair in  
this position. The force applied for tightening the knob is adjustable. This  
adjustment is performed after releasing the hinged joint by turning screw  
(19) about its axis. To carry out the adjustment, pull out plate (20) that  
retains the screw in position and turn it complete with the screw to the  
next fixed position. In so doing, remember that the knob retaining force  
becomes greater as the plate is turned clockwise and vice versa.  
The night-vision goggles can be promptly removed from the pilot’s  
field of view and transferred to the stowed position.  
To do so, take hold of the monocular pair and, while overcoming  
the force of retainer (21), move it fully upwards to the stowed position. As  
the monocular pair is brought to a stop, the retainer will operate to hold it  
up in the stowed position.  
The electrical circuits, in this case, will become automatically de-  
energized through activation of the microswitch.  
5.4.2 Voltage converter (2) is illustrated in Fig. 3.1.  
The voltage converter is designed to supply power to the NVS 6 from  
the helicopter electrical system.  
The voltage converter consists of two separate components: low-  
voltage converter (LVC) (10) and cable (11) as shown in Fig. 5.1.  
The LVC is a stabilized DC power source used to convert the  
helicopter electrical power of 27V DC to 2.6V DC to power the unit.  
Page 13  
NVS 6  
MANUAL  
The design of the LVC is illustrated in Fig. 5.3. Structurally, the LVC  
consists of casing (1), which accommodates voltage converter (2)  
attached to it by means of screws (3). Cover (4) is fastened to the casing  
with screws (5). Connector plug (6) serves to connect the LVC to the  
helicopter electrical system of 27 V with the aid of the cable arranged on  
board the aircraft.  
Connector receptacle (7) is intended to connect cable (11), shown  
in Fig. 5.1, to the LVC.  
Connector plug (6) and connector receptacle (7) are secured to the  
casing by means of screws (8) as shown in Fig. 5.3.  
Gaskets (9) installed between the casing, the connector plug and  
the receptacle serve to protect the LVC interior against direct entry of  
moisture, whereas LVC cover (4) is filled with sealing compound for the  
same purpose. Cable (11) attached to the voltage converter is connected  
to cable (15) to make an electric power supply circuit of the night-vision  
goggles as shown in Fig. 5.1.  
The use of cables with quick-disconnect connectors makes it  
possible to promptly remove the night-vision goggles from the helmet in  
case of emergency.  
5.5 Apart from spare dehydrator cartridge, the single set of spare  
parts includes the following: test pattern, mount, casing, clamp,  
counterweight, screwdriver, cloth, spare batteries or rechargeable  
batteries. Spare parts availability is optional, to be specified in each  
individual supply contract.  
5.5.1 Test pattern (5), shown in Fig. 3.1, is designed for checking  
the quality of the image of the NVS 6 (resolving power). The check  
procedure is presented in 6.2.21 of this Manual.  
5.5.2 The mount, shown in Fig. 5.4, is intended to secure the  
NVS 6 on the helmet of the pilot or a helmet of a similar type.  
Page 14  
NVS 6  
MANUAL  
4
1
3
8
7
5
2
А1  
XS1  
XP1  
9
6
1 Casing  
4 Cover  
5 Screw  
6 Connector Plug  
7 Connector Receptacle  
8 Screw  
2 Voltage Converter  
3 Screw  
9 Gasket  
Low-Voltage Converter  
Figure 5.3  
Page 15  
NVS 6  
MANUAL  
3
5
6
1
7
1 Screw  
2 Screw  
3 Screw  
4 Guides  
5 Spring  
6 Carriage  
7 Carriage  
8 Screw  
2
9
Screw  
8
4
9
Mount  
Figure 5.4  
The mount is attached to the front portion of the helmet with the aid  
of three screws (1), (2), (3).  
The night-vision goggles are secured to the mount by means of a  
night-vision goggle plate, which is passed into the slots of guides (4) of  
the mount.  
The purpose of spring (5) is to reliably retain the NVS 6 on the  
mount.  
Page 16  
NVS 6  
MANUAL  
Carriages (6) and (7) can be moved upwards/downwards by  
rotating adjustment screw (8), as well as left/right with the aid of screw (9)  
to adjust the position of the night-vision goggles relative to the pilot’s eyes.  
The adjustment is performed with the use of the screwdriver, part of the  
single set of spare parts.  
5.5.3 Casing (8), shown in Fig. 3.1, is intended for replacing the  
helmet standard casing, which makes it possible to fasten the night-vision  
goggles. Three holes provided at the casing center are used for installation  
of mount (7) as shown in Fig. 5.1. After attaching the casing on the  
external surface of the helmet front portion with four screws (16), it  
protects visor guard (17) against any possible damage. Slots (18) are  
used as guides when lowering and lifting the visor guard. They help to  
hold the visor guard in the required position with the use of retainer cross-  
shaped knob (19) moving along the slot of the casing, together with the  
visor guard. While replacing the casing, the retainer cross-shaped knob  
can be installed for using by the right or left hand of the pilot.  
5.5.4 Clamp (9), shown in Fig. 3.1, is meant for fastening the visor  
guard when replacing the standard casing for the casing found in the set  
of spare parts. The clamp together with the visor guard fastened in it is  
attached to the casing with the help of the retainer shown in Fig. 6.1.  
5.5.5 Counterweight (10), shown in Fig. 3.1, is intended to  
compensate for the tilting momentum produced by the unit.  
The counterweight is essentially an individual assembly consisting  
of a canvas cover with a weight contained therein. As shown in Fig. 5.1,  
counterweight (9) can be quickly installed on the rear portion of the helmet  
through the use of the sticking fastener. The mass of the counterweight is  
620 g.  
The counter weight also has a strap with a sticking fastener used  
for securing night-vision goggles power cable (15).  
Page 17  
NVS 6  
MANUAL  
5.5.6 Screwdriver (4), shown in Fig. 3.1, is meant for performing  
necessary readjustments of mount (7) and also used when the helmet  
standard casing is replaced.  
5.5.7 For removing dust, moisture and dirt from the external  
surfaces of the unit, use is made of cloth (11) shown in Fig. 3.1.  
5.5.8 The rechargeable batteries included in the single set of spare  
parts, serve for replacement of failed or exhausted batteries of the  
independent power source. The rechargeable batteries are charged by  
the use of a standard battery charging unit designed for charging the AA  
type rechargeable batteries in accordance with the Manual furnished with  
the charging unit.  
5.6 The packaging components of the NVS 6 include the case and  
the set of maintenance documents (the Manual and the Log Book).  
5.6.1 The case, shown in Fig. 3.1, is used for storing and carrying  
the NVS 6 set. The case is provided with side pockets, which are  
fastened with a zipper. One pocket holds the LVC (low-voltage converter)  
and the cables, and the other one is used for holding the mount,  
counterweight and screwdriver. The inner pocket is intended for  
accommodating the test pattern, cloths, spare dehydrator cartridge and  
batteries or rechargeable batteries. The night-vision goggles and its  
accessories are delivered sealed in a polyethylene film envelope, which is  
packed in the case together with the casing and clamp. The case is  
closed with a flap fastened with a zipper and a sticking fastener. The case  
comes complete with a carrying strap.  
Page 18  
NVS 6  
MANUAL  
6 PREPARATION FOR OPERATION  
6.1 Preparation of Helmet for Mounting Night-Vision Goggles  
6.1.1 Replacement of Visor Guard/Mount Assembly  
6.1.1.1 Remove the standard mount assembly of visor guard (17)  
(Ref. Fig. 5.1). To do this, remove four screws (16) attaching the casing to  
the helmet using the screwdriver found in the set of spare parts.  
6.1.1.2 To disconnect the visor guard from the standard casing:  
(a) Remove screw (20) with the screwdriver by turning it clockwise.  
(b) Remove cross-shaped knob (19) by hand.  
(c) Remove retainer (1) (Ref. Fig. 6.1) together with the visor guard  
from the standard casing slot.  
(d) Remove the visor guard from the retainer by first turning  
retainer tail end (2) along the visor guard slot.  
6.1.1.3 Take clamp (9) shown in Fig. 3.1 from the set of spare parts.  
6.1.1.4 Remove screw (3) with the screwdriver as shown in Fig. 6.2  
and remove bushing (4) from the clamp hole.  
6.1.1.5 insert the visor guard into clamp slot (5) accurately without  
turning askew and applying much force, and fasten it using a bushing and  
a screw.  
6.1.1.6 Take casing (8) out of the set of spare parts. Connect the  
clamp, together with the visor guard secured in it, to the casing. To do  
this, insert retainer tail end (2) along recess (6) of the clamp (left-hand or  
right-hand at the option of the pilot) and turn it crosswise the recess as  
shown in Fig. 6.2.  
6.1.1.7  
Pass the retainer threaded portion through the  
respective (left-hand or right-hand) slot of casing (8)  
and proceed as in Steps 6.1.1.2 (b), 6.1.1.2 (a) and  
6.1.1.1 observing the mentioned order.  
Page 19  
NVS 6  
MANUAL  
20  
19  
18  
7
9
3
17  
5
6
+
4
8
2
1
1 Retainer  
6 Recess  
17 Visor Guard  
18 Slot  
2 Tail End  
3 Screw  
7 Washer  
8 Casing  
9 Clamp  
19 Cross-shaped Knob  
20 Screw  
4 Bushing  
5 Recess  
Replacement of Casing on Helmet  
Figure 6.1  
Page 20  
NVS 6  
MANUAL  
1
2
1 Retainer  
2 Tail End  
6 Recess  
9 Clamp  
9
6
Assembly of Clamp with Retainer  
Figure 6.2  
6.1.2 Installation of Counterweight  
6.1.2.1 Take counterweight (10) (Ref. Fig. 3.1) from the set of spare  
parts, remove the backing of the sticking fastener meant for fastening to  
the helmet.  
6.1.2.2 Bond the removed  
fastener to the rear potion of the  
helmet external surface so that the  
hole made at the center of the  
fastener coincides with screw head  
(1) (Fig. 6.3), the lower edge of the  
1
fastener therewith should join to the  
helmet rubber edging. Before bonding  
with adhesive trace the outline of the  
fastener on the helmet and  
thoroughly remove the paint from the  
helmet within the outline.  
Figure 6.3  
Page 21  
NVS 6  
MANUAL  
6.1.2.3 The adhesive recommended for usage is acrylate cyanide,  
type LOCTITE 454, or the like providing an adequate bonding of  
fiberglass laminate with polyvinyl chloride (the adhesive sets in 2 to 3 min  
and the unit may be used after a lapse of 24 h). For the bonding  
procedure, refer to the Instructions for Cement Usage.  
6.1.2.4 While bonding the fastener press its smooth side to the  
helmet surface evenly without applying an excessive force. Apply  
pressure to the fastener total area and use a screw clamp for locking the  
parts to be bonded (Uniformly press the sticking fastener against the  
helmet until its strip is bonded to the helmet, use should be made of the  
suitable device).  
6.2 Individual Adjustment and Fitting (Figs 6.4 thru 6.6)  
CAUTION: EACH PILOT SHOULD CARRY OUT INDIVIDUAL  
FITTING AND ADJUSTMENT OF THE NIGHT-VISION GOGGLES.  
Before starting the adjustment check to see that the lenses are  
closed with safety caps.  
6.2.1 Remove the night-vision goggles from the case.  
6.2.2 Depress button (1) (Ref. Fig. 6.4) and, while holding the fixing  
assembly in one hand, take monoculars (28) and (29) in the other hand,  
transfer the goggles to the operating position so that the fixing assembly  
is straightened. In doing so, see that only a slight force is applied to  
securely lock (latch) the monocular pair in the operating position,  
indicated by a click of retainer (21) (Ref. Fig. 5.2).  
CAUTION: IN THE EVENT OF FAILURE OF THE RETAINER TO  
LATCH THE MONOCULAR PAIR IN THE OPERATING POSITION, THE  
NIGHT-VISION GOGGLES WILL NOT BE ENERGIZED AND THE  
INDIVIDUAL ADJUSTMENT WILL NOT BE POSSIBLE.  
6.2.3 To ensure proper latching, essential for retaining the  
monocular pair in the operating position, check to see that the hinged joint  
linking the monocular pair to the unit fixing assembly is reliably locked.  
Page 22  
NVS 6  
MANUAL  
Should the monocular pair fail to be locked relative to the unit fixing  
assembly, proceed as follows:  
– Move knob (2) (Ref. Fig. 6.4) to the top position (the hinged joint,  
in this case, will be fully released).  
– Pull out plate (3), which retains screw (4) in the locked position,  
with your thumb and forefinger, turn it to the next locking position in the  
clockwise direction and release the plate. The plate shall be set to a new  
locking position (Ref. Step 6.2.2).  
– This done, lock the hinged joint linking the monocular pair to  
the unit fixing assembly again by applying an effort to knob (2) so as to  
bring it down as far as it will go.  
If the monocular locking continues to fail, carry out the above  
procedure one more time.  
6.2.4 Take power supply components (two batteries of type size AA  
R6 1.5V or rechargeable batteries) out of the case. When using the  
rechargeable batteries, first charge them in accordance with the Manual  
furnished with the battery-charging unit.  
6.2.5 Insert two batteries into the recess of guide (8) with the positive  
contact directed inwards by first unscrewing and removing cap-switch (5),  
and then screw it in fully in the clockwise direction.  
6.2.6 Release knob (2) and set the top portion of the fixing assembly  
perpendicular to the axes of monocular (28) and monocular (29). While  
holding the fixing assembly in one hand, displace the monocular pair with  
the other hand forward and downward until they are butted up against the  
cruciform guides of the fixing assembly. Once completed, tighten the  
knob to lock the monocular pair in the desired position.  
WARNING: NEGLECT OF THE REQUIREMENTS DESCRIBED IN  
THE ABOVE STEP MAY RESULT IN EYE INJURY DURING THE  
COMPLETION OF FURTHER PREPARATORY OPERATIONS.  
Page 23  
NVS 6  
MANUAL  
14  
16 26 12 27 13 16 27  
1
11  
18  
9
2
10  
29  
3
4
25  
28  
8
7
6 5  
1 Button  
2 Knob  
9
Counterweight  
16 Screw  
18 Lever  
10 Strap  
3 Plate  
11 Cross-head Knob  
12 Guide  
13 Retainer  
14 Cable  
15 Visor Guard  
25 Connector  
26 Mount  
27 Screw  
28 LH Side Monocular  
29 RH Side Monocular  
4 Screw  
5 Cap-switch  
6 Cap  
7 Button  
8 Guide  
Installation of Night-Vision Goggles on Helmet in Operating Position  
Figure 6.4  
Page 24  
NVS 6  
MANUAL  
2
12 13  
16  
14  
27  
26  
27  
17  
5
4
3
1
18  
9
10  
25  
1 Button  
10 Strap  
12 Guide  
17 Ring  
2 Knob  
18 Lever  
3 Plate  
13 Retainer  
14 Cable  
16 Screw  
25 Connector  
26 Mount  
27 Screw  
4 Screw  
5 Cap-switch  
9 Counterweight  
Night-Vision Goggles Installed on Helmet in Stowed Position  
Figure 6.5  
Page 25  
NVS 6  
MANUAL  
2 6  
1 2  
1 6  
1 3  
2 7  
1
1 8  
3
4
7
2
1 Button  
2 Knob  
3 Plate  
4 Screw  
7
Button  
18 Lever  
26 Mount  
27 Screw  
12 Guide  
13 Retainer  
16 Screw  
Installation of Night-Vision Goggles on Helmet and Their Adjustment  
Relative to Pilot’s Eyes  
Figure 6.6  
Page 26  
NVS 6  
MANUAL  
14  
12  
13  
1
22 23 19  
15  
2
21  
20  
24  
15  
1
Button  
19 LVC (Low-Voltage Converter)  
20 Cable  
21 LVC Power Cable Running from  
Helicopter Electrical System  
22 Receptacle  
23 Plug  
24 Spring Clamp  
25 Connector  
12 Guide  
13 Retainer  
14 Cable  
Connection of Night-Vision Goggles to Helicopter Electrical System Via  
Voltage Converter  
Figure 6.7  
6.2.7 Position the eyepieces of the goggles at eye level, turn on the  
night-vision goggles by turning cap (6) of cap-switch (5) in the  
Page 27  
NVS 6  
MANUAL  
counterclockwise direction until it is retained in the ON position and check  
to see that the unit operates properly. In so doing, see to it that the  
image-intensifier tube screens start glow steadily in amber-green  
(without flashes and twinkling) in the monocular pair of the night-vision  
goggles.  
CAUTION: TO SAFEGUARD THE UNIT AGAINST DAMAGE, MAKE  
ABSOLUTELY SURE THAT THE SAFETY CAPS ARE FITTED ON THE  
LENSES WHEN THE NIGHT-VISION GOGGLES ARE TURNED ON IN  
THE PRESENCE OF LIGHT.  
6.2.8 Depress button (7) and displace LH side monocular (28) with  
respect to the immobile RH side monocular, along guide (8) to  
preliminarily select the optimum distance between the eye pupils in  
accordance with the interpupilary distance of the operator. Release button  
(7) and the LH side monocular will be locked in the selected position.  
6.2.9 Turn cap (6) of cap-switch (5) in the clockwise direction as far  
as it will go to de-energize the night-vision goggles.  
6.2.10 Take hold of the monocular pair with one hand and the fixing  
assembly with the other hand, and transfer the night-vision goggles to the  
stowed position as shown in Fig. 6.5 (i.e. fold up the fixing assembly by  
overcoming the retainer force that locks the goggles in the operating  
position).  
6.2.11 Remove mount (26), part of the single set of spare parts,  
designed for attaching the night-vision goggles, from the outer pocket of  
the case and install it on the front portion of the helmet. To do so, insert  
three screws (27) into the threaded holes in the helmet casing and tighten  
them.  
6.2.12 Remove counterweight (9) (Ref. Fig. 6.4) from the outer  
pocket of the case, install it on the rear portion of the helmet and secure it  
by means of the sticking fastener.  
Page 28  
NVS 6  
MANUAL  
6.2.13 Carry out preparatory operations on the pilot’s helmet in  
compliance with the Manual. Loosen cross-shaped knob (11) and use it to  
move visor guard (15) fully so that the visor guard is retracted under the  
casing. These done, fix the visor guard in this position by tightening the  
cross-shaped knob.  
6.2.14 Install the night-vision goggles, which are currently placed in  
the stowed position, onto the helmet (with the helmet removed from the  
head), by joining the fixing assembly of the night-vision goggles to the  
helmet mount. To do so, insert the plate of the fixing assembly of the  
night-vision goggles into the slots of guide (12) (Ref. Fig. 6.4) of helmet  
mount (26). Exercise due care to avoid misalignment, then, turn the plate  
upwards until retainers (13) become latched.  
6.2.15 Attach cable (14) to the helmet by first passing it under  
unfastened strap (10) on counterweight (9) and then fasten the strap  
using the sticking fastener.  
6.2.16 Secure the helmet, complete with the goggles placed in the  
stowed position, on the pilot’s head.  
6.2.17 Transfer the goggles to the operating position (Ref. Step 6.2.2  
of this Manual) and turn them on (Ref. Step 6.2.7 of this Manual).  
6.2.18 Set RH side monocular (29) precisely opposite the right eye  
of the pilot. To do so, ease up knob (2) and displace the monocular pair of  
the night-vision goggles in the cruciform guides of the fixing assembly  
upward or downward, forward or backward. Simultaneously turn them  
about the axis of knob (2) to find the optimum position at which the NVS 6  
monocular pair is properly set away from the eyes and their optical axes  
have the required tilt.  
By an optimum position of the monocular pair relative to the pilot’s  
eyes, is meant, a position that provides adequate conditions for carrying  
out observation of the full field of view of the RH side monocular with the  
Page 29  
NVS 6  
MANUAL  
right eye, as well as clear view of the surrounding space by shifting gaze  
downwards under the eyepieces of the night-vision goggles.  
Note – If the RH side monocular of the night-vision goggles fails to  
be set to the position at which the sighting line of the pilot’s eye passes  
through its center, the position of the RH side monocular shall be  
corrected by moving the night-vision goggles upwards or downwards,  
right or left relative to the helmet. To do so, the carriages of helmet mount  
(26) should be shifted by the adjustment of screws (16) utilizing the  
screwdriver provided (Ref. Fig. 6.6). On completion of the corrective  
actions, perform the operations described in this step once again.  
6.2.19 Carry out the operations prescribed by Step 6.2.8 of this  
Manual to finally adjust the interpupilary distance.  
Make sure that the full field of view of the night-vision goggles is  
provided for both eyes.  
6.2.20 Adjust the eyepieces to the appropriate dioptric sighting by  
turning rings (17) (Ref. Fig. 6.5) of the eyepieces until a sharp structural  
image of the screens on the image-intensifier tubes is attained.  
6.2.21 Evaluate the operational status of the night-vision goggles  
by checking the image quality (resolving power). For this purpose, take a  
test pattern, from the single set of spare parts and arrange it at a distance  
of an outstretched hand away from the lenses ((750 16) mm). The  
settings of the night-vision goggles are considered to be normal if the test  
pattern lines are clearly visible and the check text is readable. Both  
monoculars should operate without flashes and twinkling.  
CAUTION: THE SERVICEABILITY CHECK OF THE NIGHT-  
VISION GOGGLES SHALL BE ACCOMPLISHED IN THE PRESENCE  
OF LIGHT WITH THE LENSES COVERED BY THE SAFETY CAPS.  
6.2.22 De-energize the night-vision goggles (Ref. Step 6.2.9 of this  
Manual).  
Page 30  
NVS 6  
MANUAL  
6.2.23 Check the operation of the mechanism permitting  
emergency removal of the night-vision goggles from the helmet. To test,  
depress levers (18) (Ref. Fig. 6.4) of the fixing assembly with the thumb  
and forefinger and simultaneously pull the night-vision goggles promptly  
downwards. As the night-vision goggles become released from the guide  
on the helmet, keep on moving your hand to the left and right side to  
disengage the power cable from the helmet. The night-vision goggles shall  
easily separate from the mount of the helmet and remain in the pilot’s  
hands.  
Regardless of the position, operating or stowed, the night-vision  
goggles will be easily removed.  
WARNING: THE NIGHT-VISION GOGGLE REMOVAL TO BE  
PERFORMED IN THE EVENT OF AN EMERGECY ESCAPE FROM THE  
HELICOPTER MUST BE THOROUGHLY PRACTICED BY THE PILOT  
ON THE GROUND TO ENHANCE HIS SAFETY IF EMERGENCY  
ESCAPE FROM THE COCKPIT SHOULD BE NECESSARY.  
6.2.24 Transfer the night-vision goggles to the stowed position as  
instructed in Step 6.2.10 of this Manual.  
6.2.25 Take out the used batteries from the night-vision goggles.  
6.2.26 Take off the helmet and detach counterweight (9).  
6.2.27 Place the night-vision goggles into the case and put the  
counterweight into the outer pocket.  
6.2.28 Discharge the rechargeable batteries, if any, and recharge  
them, using a standard charging unit designed for charging the  
rechargeable batteries of type size AA 1.5 V in accordance with the  
Manual furnished with the unit.  
6.2.29 Place the batteries (including rechargeable batteries) into  
the inner pocket of the case.  
Page 31  
NVS 6  
MANUAL  
6.3 Arrangement of Night-Vision Goggles on Helicopter (Figs  
6.4 thru 6.7)  
6.3.1 Remove the following components from the case (Ref. Fig.  
3.1): night-vision goggles (1), batteries (6) (2 pcs), mount (7), counterweight  
(10), voltage converter (2) complete with LVC (low-voltage converter) (10)  
(Ref. Fig. 5.1), and cable (11).  
6.3.2 Secure LVC (19) (Ref. Fig. 6.7) in the place allotted for it in  
the cockpit and connects it to the helicopter electrical system by making  
use of airborne power cable (21) (engage receptacle (22) with LVC  
plug (23)).  
6.3.3 Attach cable (20) with the aid of spring clamps (24) in the  
cockpit.  
6.3.4 Install mount (26) found in the single set of spare parts (Ref.  
Fig. 6.6, Step 6.2.11) onto the front portion of the helmet.  
6.3.5 Install counterweight (9) (Ref. Fig. 6.5, Step 6.2.12) onto the  
rear portion of the helmet.  
6.3.6 Insert batteries into the special recess on the night-vision  
goggles (Ref. Step 6.2.5 of this Manual) to ensure independent power  
supply of the goggles.  
6.3.7 Install the night-vision goggles on the helmet (with the helmet  
removed from the head) in the stowed position (Ref. Fig. 6.5), for this  
purpose; join the fixing assembly of the night-vision goggles to mount (26)  
of the helmet (Ref. Fig. 6.6). Using extreme care, insert the fixing  
assembly plate of the night-vision goggles into the slots of guide (12) of  
helmet mount (26) avoiding misalignment and shift the plate upwards until  
retainers (13) become latched.  
Prior to installation, the night-vision goggles shall be adjusted to fit  
the eyes of a pilot as instructed in Section 6.2 of this Manual.  
Page 32  
NVS 6  
MANUAL  
6.3.8 Fasten cable (14) on counterweight (9) using strap (10) (Ref.  
Fig. 6.5, Step 6.2.15).  
6.3.9 With the goggles placed in the stowed position secure helmet  
soundly on the pilot’s head.  
6.3.10 Connect cable (14) to cable (20) with the use of the connector  
(25) (Ref. Fig. 6.7).  
6.3.11 Turn on the switch to apply the helicopter electrical power to  
the night-vision goggles.  
6.3.12 Depress button (1) (Ref. Figs 6.4, 6.5) and, while holding the  
fixing assembly with one hand and taking hold of the monocular pair with  
the other hand, transfer the goggles to the operating position so that the  
fixing assembly becomes straightened. In doing so, see to it that only  
slight effort is applied for ensuring proper locking (latching) of the  
monocular pair in the operating position. Only an effort sufficient to cause  
operation of retainer (21) is necessary. (Ref. Fig. 5.2). The goggles will  
get energized.  
This done, the pilot shall see amber-green illumination free from  
flashes and twinkling on the screens of both channels of the night-vision  
goggles, which is indicative of normal operation of the goggles powered  
from the helicopter electrical system.  
Note – When the night-vision goggles are powered from the  
helicopter electrical system, they are energized and de-energized  
automatically in response to their transfer from the stowed to the  
operating position and vice versa irrespective of the position of cap (6) (Ref.  
Fig. 6.4) of cap-switch (5).  
CAUTION: 1 WHEN THE NIGHT-VISION GOGGLES ARE  
SWITCHED ON IN THE PRESENCE OF LIGHT OR WITH THE WHITE  
FLOOD LIGHT TURNED ON, MAKE ABSOLUTELY SURE THAT THE  
SAFETY CAPS ARE FITTED ON THE LENSES TO PREVENT DAMAGE  
OF THE UNIT.  
Page 33  
NVS 6  
MANUAL  
2 IF THE POWER SUPPLY OF THE GOGGLES FROM THE  
HELICOPTER ELECTRICAL SYSTEM IS NOT AVAILABLE, THEIR  
OPERATION MAY BE PROVIDED FROM THE INDEPENDENT BUILT-IN  
POWER SOURCE (TWO BATTERIES AA R6 1.5 V OR  
RECHARGEABLE BATTERIES OF A SIMILAR TYPE).  
6.3.13 If the alignment of the monoculars of the night-vision  
goggles with respect to the eyes of the pilot is not accurate enough and  
the monocular pair is not adjusted to suit individual features of his  
eyesight, perform the adjustment operations as prescribed by Steps 6.2.19,  
6.2.20 of this Manual.  
Now the goggles are ready for work.  
Upon completion of work with the goggles, carry out the following  
operations:  
6.3.14 Take hold of the monocular pair with one hand and the fixing  
assembly with the other hand and transfer the night-vision goggles to the  
stowed position (i.e. "fold up" the fixing assembly by overcoming the force of  
the retainer which locks the goggles in the operating position).  
6.3.15 Turn off the switch used for supplying power from the  
helicopter electrical system to the night-vision goggles.  
6.3.16 Disconnect cable (14) (Ref. Fig. 6.7) from cable (20) by  
disengaging the connector (25).  
6.3.17 Take off the helmet complete with the night-vision goggles  
installed and detach the counterweight from the helmet.  
6.3.18 Remove the night-vision goggles from the helmet by pulling  
them down by hand, having pressed levers (18) (Ref. Fig. 6.4) to disengage  
the goggles fixing assembly plate from the guides of mount (26) of the helmet.  
6.3.19 Remove screws (27) and remove mount (26) from the helmet.  
6.3.20 Remove the used batteries from the night-vision goggles.  
Page 34  
NVS 6  
MANUAL  
6.3.21 Disconnect power cable (21) (Ref. Fig. 6.7) of the helicopter  
electrical system from the LVC (low-voltage converter), and disengage  
cable receptacle (22) from plug (23) of the LVC.  
6.3.22 Remove the LVC (complete with cable (20)).  
6.3.23 Put the night-vision goggles into the case. Do not put the  
rechargeable batteries into the case.  
6.3.24 Discharge and recharge the rechargeable batteries in  
conformity with the Instructions presented in the Manual furnished with  
the standard battery-charging unit.  
6.3.25 Pack the batteries and the rechargeable batteries after being  
charged into the case.  
Page 35  
NVS 6  
MANUAL  
7 OPERATION PROCEDURE  
7.1 The conditions in which the night-vision goggles are operated  
have their own idiosyncrasy, which requires certain skills on the part of  
the pilot as the image of the terrain and objects visible through the night-  
vision goggles is monochromic and not very soft.  
7.2 The night-vision goggles enable the pilot not only to nap off the  
earth but also view the instrument panel by taking a look downwards or  
sideways past the eyepieces.  
CAUTION: WHEN THE NVS 6 IS USED AT NIGHT TIME, THE  
SAFETY CAPS SHALL BE REMOVED FROM THE LENSES.  
7.3 For removing the safety caps, press simultaneously on both  
retainers and, while holding them depressed, take the cap off of the lens  
mount. Put the removed caps into the case pocket.  
7.4 After removing the safety caps, focus the lenses of each  
monocular by rotating the lens about its optical axis so as to attain the  
sharp image of the viewed objects in the space outside the cockpit (for  
convenience of rotation each lens is provided with knurling).  
7.5 In case that the airborne power supply is not available, turn on  
the independent power source to feed power to the night-vision goggles  
by turning cap (6) of cap-switch (5) (Ref. Fig. 6.4).  
7.6 If the night-vision goggles become exposed to bright light, turn  
your head to divert the lenses sideways so as to bring the image of bright  
light sources outside the field of view.  
7.7 In the event of fogging of the eyepieces of the night-vision  
goggles (low temperature), pull the goggles out of the operating position  
and wipe dry the external surfaces of the eyepieces with a cloth included  
in the single set of spare parts.  
7.8 After long usage of the night-vision goggles on the pilot’s head  
(more than 2.5 h), the pilot may feel a light fatigue in the neck muscles.  
Page 36  
NVS 6  
MANUAL  
7.9 Upon completion of work with the night-vision goggles and after  
the helicopter landing, perform the operations prescribed by Steps 6.2.14  
thru 6.2.25. If need be, clean the night-vision goggles and their  
accessories from dust, dirt and traces of moisture with the cloth included  
in the single set of spare parts.  
7.10 The preparation of the night-vision goggles for the next flight  
consists in replacement of the rechargeable batteries used in flight with  
newly charged ones and accomplishment of operations in accordance with  
Table 5.  
7.11 Prior to an emergency evacuation of the helicopter, depress  
levers (18) (Ref. Fig. 6.4) of the fixing assembly with the left (right) hand  
thumb and forefinger and promptly pull the night-vision goggles down. As  
the goggles become disengaged from the guide on the helmet, keep on  
moving your hand to the left or right side until the power cable gets  
disconnected from the helmet.  
The subsequent operations shall be carried out in compliance with  
the "Helicopter Crew Instructions" that specify the procedures for the night-  
vision goggles usage during flights.  
Page 37  
NVS 6  
MANUAL  
8 OPERATIONAL STATUS CHECK  
8.1 In the course of the NVS 6 service, it is essential to continually  
carry out its inspection. The inspection shall be accomplished during all  
kinds of maintenance checks with the aim of determining the unit  
operational status, and detecting in due time its defects and their  
correction. The operational status of the unit is exemplified by its  
serviceability, completeness of its standard set, and readiness for use.  
8.2 The list of the basic checks of the NVS 6 and its accessories  
for operational status (inspection procedures) is presented in Table 3.  
Table 3  
Procedure  
Inspection method  
Technical requirements  
1 Unit standard  
set inspection for  
full complement  
Check the standard  
delivery set against  
The unit standard set  
shall comply with the  
the list of the unit com- standard delivery set  
ponents in the Log  
Book.  
specified in the NVS 6 Log  
Book.  
2 External  
inspection of  
the unit and its  
accessories  
Inspect the unit for  
The external surfaces of  
external condition (vi- the unit and its accessories  
sually).  
shall not be affected by  
cracks, dents, traces of cor-  
rosion and other defects.  
The lenses and  
eyepieces shall be free  
from cracks, spots of  
grease and dirt.  
3 Serviceability  
The procedure for  
With the unit energized  
test of the unit and serviceability test is  
its accessories  
(either from the helicopter  
described in Section 6 electrical system via the  
of this Manual. voltage converter, or from  
Table 3, cont'd  
Page 38  
NVS 6  
MANUAL  
Procedure  
Inspection method  
Technical requirements  
IPS), the image-intensifier  
tube screens shall  
illuminate and, after dioptric  
adjustment of  
the eyepieces (Ref. Step  
6.2.20) and focusing of the  
lenses (Ref. Step 7.4),  
nearby objects shall be  
clearly seen in the unit field  
of view.  
4 Quality of  
image viewed by  
unit  
The check is  
The unit shall provide for  
conducted by the pilot distinct identification of the  
in the course of test pattern lines in all four  
individual adjustment directions and easy reading  
of the night-vision  
goggles (Ref. Step  
6.2.21)  
of the check text, which is  
indicative of the fact that  
the unit is ready for use.  
9 TROUBLE SHOOTING  
9.1 Normal operation of the NVS 6 is substantiated by the following  
indications:  
(a) Feasibility of observing the illumination of the screens (without  
flashes and twinkling) of each of the two image-intensifier tubes through  
the eyepieces.  
(b) Clear visibility of nearby objects and the test pattern lines in  
the course of preflight preparation.  
9.2 All these signs are indicative of the adequate operational status  
of the NVS 6 for ensuring its normal functioning.  
9.3 The list of the most frequent and probable troubles of the NVS  
6 is given in Table 4.  
Page 39  
NVS 6  
MANUAL  
Table 4  
Trouble  
and  
symptoms  
Probable  
cause  
Correction  
Remarks  
1 NVS 6 failure  
to operate  
1 Polarity of  
connected  
1 Remove  
Can be  
rechargeable  
performed in  
(image-intensifier rechargeable batteries and then the field  
tube screens are batteries is not fit them in so that  
not illuminated)  
observed  
the positive lead  
marked with "+" is  
directed inwards  
into guide (2) (Ref.  
Fig. 5.2)  
2
1 Charge  
Can be  
Rechargeable rechargeable  
performed in  
batteries  
batteries on the bat- the field  
(batteries) are tery charging unit  
discharged or as instructed in the  
unserviceable Manual furnished  
with  
Trouble  
and  
symptoms  
Probable  
Remedy  
cause  
Remarks  
The unit, or replace  
failed rechargeable  
batteries or batteries  
with serviceable  
ones included in  
the single set of  
Page 40  
NVS 6  
MANUAL  
Trouble  
and  
symptoms  
Probable  
cause  
Remedy  
spare parts  
Remarks  
3 Presence  
of moisture  
1 Replace dehyd-  
rator cartridge (13)  
Can be  
performed in  
the field  
inside the unit (Ref. Fig. 5.1), by  
first inspecting the  
color of silica gel  
indicator through  
sight glass (14).  
Replace the silica  
gel, when its color is  
turned lilac or rosy  
4 LVC or  
1 Forward the unit  
To be  
cable are out for repair  
of order  
performed at a  
repair shop or  
at Manu-  
facturer’s  
facilities  
5 Image-  
1 Forward the unit  
To be  
intensifier tube for repair  
is out of order  
performed at a  
repair shop or  
at Manu-  
facturer’s  
facilities  
Page 41  
NVS 6  
MANUAL  
Trouble  
and  
symptoms  
Probable  
cause  
Remedy  
Remarks  
Can be  
2 Image of  
1 Dirt on  
1 Wipe clean  
viewed objects is external  
external surfaces of performed in  
lens (1) (Ref. Fig. 5.1) the field  
not sufficiently  
sharp  
surfaces of  
the unit lens, and eyepiece (2)  
eyepiece  
with cloth (11) (Ref.  
Fig. 3.1) included in  
the single set of  
spare parts  
2 Unit is out  
1 Adjust properly  
Can be  
of focus  
(dioptric  
setting of  
sharpness of image performed in  
by rotating eyepiece the field  
(2) (Ref. Fig. 5.1)  
eyepieces has with the aid of  
not been  
adjustment ring (3).  
performed,  
lenses have  
not been  
2 Bring the image  
viewed in lenses (1)  
(Ref. Fig. 5.1) into  
sharp focus as  
instructed in Step  
7.4  
focused)  
3 Lens or  
1 Forward  
the unit for  
repair  
To be  
eyepiece is af-  
fected by phy-  
performed at a  
repair shop or  
Page 42  
NVS 6  
MANUAL  
Trouble  
and  
symptoms  
Probable  
cause  
Remedy  
Remarks  
at Manu-  
sical damage  
repair  
facturer’s  
facilities  
1 The  
1 Forward the unit  
To be  
image-  
for repair  
performed at a  
repair shop or  
at Manu-  
3 One of the  
intensifier tube  
is unser-  
image-intensifier  
tube screens is  
not illuminated.  
viceable  
facturer’s  
facilities  
Visible on the  
screen are black  
dots that tend to  
grow to a  
dimension of a  
segment  
4 With the unit  
1 Moisture  
1 Replace  
Can be  
energized, drops has got inside dehydrator cartridge performed in  
of moisture are the unit (failure (13) (Ref. Fig. 5.1), the field  
visible on optical of the eye- by first inspecting  
surfaces in the  
field of vision of  
the eyepiece  
piece sealing) the color of silica gel  
indicator through  
the sight glass (14).  
Replace silica gel  
Page 43  
NVS 6  
MANUAL  
Trouble  
and  
symptoms  
Probable  
cause  
Remedy  
Remarks  
when its color has  
changed to lilac or  
rosy  
5 Night-vision  
1 Fixing  
1 Forward the unit  
for repair  
To be  
goggles are not assembly of  
properly secured the night-visi-  
on the mount of on goggles is  
performed at a  
repair shop or  
at Manu-  
the helmet  
out of order  
facturer’s  
facilities  
Page 44  
NVS 6  
MANUAL  
10 MAINTENANCE PRACTICES  
10.1 The maintenance operations to be carried out on the NVS 6  
constitute the essential part of the unit operation and their correct  
performance can significantly prolong the unit service life and keep it  
always ready for use.  
10.2 For maintaining the NVS 6 at constant readiness for service,  
provision is made for the following line maintenance procedures (preflight  
checks):  
(1) Preliminary preparation.  
(2) Preflight preparation.  
(3) Preparation for the next flight.  
(4) Post flight procedures.  
10.3 The maintenance operations and checks stipulated by the  
above maintenance practices are presented in Table 5.  
Table 5  
Line maintenance procedures  
(preflight checks)  
Subject of maintenance  
and operations  
Prelimi-  
nary  
preparat  
ion  
Prepara- Post-  
Preflight  
prepara-  
tion  
tion for  
next  
flight  
proced  
ures  
flight  
1 Storage battery charging in  
accordance with the Manual  
furnished with the battery charging  
unit (in using rechargeable  
batteries) or replacement of  
batteries  
+
2 Cleaning external surfaces of  
the lens and eyepiece in  
+
compliance with the procedure  
prescribed by this Manual  
Page 45  
NVS 6  
MANUAL  
Table 5, cont'd  
Line maintenance procedures  
(preflight checks)  
Subject of maintenance  
and operations  
Prelimi-  
nary  
preparat  
ion  
Prepara- Post-  
Preflight  
prepara-  
tion  
tion for  
next  
flight  
proced  
ures  
flight  
3 Inspection:  
Inspection of the night-vision  
goggles and their accessories for  
external condition as instructed in  
Section 8:  
+
+
+
+
Checking the unit set for  
completeness  
+
+
+
+
+
+
Checking the night-vision  
goggles and their accessories for  
external condition  
Testing the night-vision goggles  
for serviceability  
+
+
+
+
+
Checking the night-vision  
goggles for image quality  
4 Preparation of the unit for  
use in compliance with Section 6:  
Individual adjustment and fitting  
of the unit  
+
+
Arrangement of the night-vision  
goggles on the helicopter  
5 Concluding operations on  
the unit as per Sections 6, 7  
+
+
Page 46  
NVS 6  
MANUAL  
10.3.1 For cleaning the outer surfaces of the lenses and eyepieces,  
wipe them with a clean cloth included in the single set of spare parts, by  
first blowing off grains of sand and dust from the surfaces.  
In case of severe contamination of the optical parts, do their  
cleaning as follows:  
– Obtain a Q-tip (used for ears cleaning). If not available, wind  
a small amount of cotton wool around the end of a wooden stick, after  
having sharpened the stick end  
– Moisten the cotton wool (or Q-tip) with alcohol or ether, or their  
mixture and then shake the stick to remove excess of liquid;  
– Wipe the glass with the cotton wool (or Q-tip) several times  
without touching the eyepieces with hands  
– Replace the cotton wool (or Q-tip) with a dry one and perform  
circular strokes with the cotton wool moving it from the center to the edge to  
finish the cleaning.  
It should be remembered that the unit should be de-energized  
during the process of optical surfaces cleaning. Perform cleaning of the  
monocular pair, fixing assembly and unit accessories to remove dust, dirt,  
etc. (if any).  
10.4 In the course of service and storage of the NVS 6, it is  
necessary to ensure replacement of the independent power source.  
10.4.1 The rechargeable batteries shall be replaced on expiration  
of the guarantee period of their service life, whereas the batteries shall be  
replaced as they are run down.  
10.5 The periodic maintenance checks (scheduled maintenance  
procedures) meant for maintaining the unit in the serviceable condition  
throughout the entire service life shall be conducted within the single time  
intervals as determined by the total flying time (Ref. Table 6).  
Note – Information on the service time limits and man-hours to per-  
form the maintenance checks is presented in the helicopter Manual.  
Page 47  
NVS 6  
MANUAL  
Table 6  
Maintenance check intervals, hours (months)  
Procedure  
and parameter under  
check  
50  
100  
200  
(6 months)  
(12 months) (24 months)  
1 Cleaning lens and  
eyepiece external  
surfaces  
+
+
+
+
+
2 Inspection:  
Inspecting the night-  
vision goggles and their  
accessories for external  
condition  
+
Checking the unit set  
for completeness  
+
+
+
+
+
+
Testing the night-vision  
goggles and their  
accessories for  
serviceability  
Checking the night-  
vision goggles for image  
quality (resolving power)  
+
+
+
+
+
+
3 Periodic inspection:  
Checking screws for  
proper tightness and  
inadvertent loosening  
Adjustment of retainers  
force for locking in  
operating position (if  
required)  
+
+
+
Page 48  
NVS 6  
MANUAL  
required)  
10.6 The inspection procedure shall be performed as specified in  
Table 3.  
10.7 The image quality shall be tested in compliance with Step 6.2.21.  
10.8 The screws shall be checked for proper tightness, slipping and  
inadvertent loosening with the aid of the screwdriver, included in the set of  
spare parts.  
When carrying out this check, make sure that the screws  
completely secure the joints between parts and assemblies. Screw  
slippage and loosening are inadvisable.  
10.9 The adjustment of force of retainer (21) (Ref. Fig. 5.2) shall be  
accomplished by turning the retainer attachment screw.  
When the screw is turned, the retaining force changes (retainer  
spring pressing force).  
Page 49  
NVS 6  
MANUAL  
11 STORAGE AND SHIPMENT  
11.1 The NVS 6 units should be stored in heated premises at  
a temperature of +5 to +40 oC and a relative air humidity of not in excess  
of 80 %.  
11.2 Maintenance of the units, while at store, shall be performed as  
instructed in Section 10 of this Manual.  
11.3 Perform preservation of the unit before placing it for prolonged  
storage. The preservation is done by the use of lamination method  
(the units are sealed in a polyethylene bags).  
On the expiry of three years since preservation, the unit shall be  
subject to repeated preservation.  
11.4 The NVS 6 can be shipped by any type of transport and over  
varied distances, provided proper packaging is in place.  
During transportation the package that contains the case with  
the unit shall be securely protected against shocks and dropping.  
The case shall be placed in the package with the top cover directed  
upwards and carefully fastened.  
CAUTION: AVOID DROPPING THE PACKAGE WITH THE UNIT  
DURING LOADING AND UNLOADING OPERATIONS.  
Page 50  
NVS 6  
MANUAL  
APPENDIX A  
List of Illustrations  
(reference)  
Fig.  
Title  
Page  
3.1 NVS 6 Standard Set  
5.1 NVS 6  
6
9
5.2 Night-Vision Goggles  
5.3 Low-Voltage Converter  
5.4 Mount  
11  
15  
17  
20  
21  
21  
24  
6.1 Replacement of Casing on Helmet  
6.2 Assembly of Clamp with Retainer  
6.3  
6.4 Installation of Night-Vision Goggles on Helmet in  
Operating Position  
6.5 Night-Vision Goggles Installed on Helmet in Stowed  
Position  
25  
26  
27  
6.6 Installation of Night-Vision Goggles on Helmet and Their  
Adjustment Relative to Pilot’s Eyes  
6.7 Connection of Night-Vision Goggles to Helicopter  
Electrical System Via Voltage Converter  
Page 51  
APPENDIX B  
List of Abbreviations  
(reference)  
FOV – Field of view  
IPS – Independent power source  
LVC – Low-voltage converter  
Page 52  
NVS 6  
MANUAL  
WARRANTY:  
NEWCON OPTIK warrants this product against defects in material and  
workmanship for one year from the date of the original date of consumer's  
purchase, but no more than 18 months from the date of manufacturing. Should  
your Newcon product prove defective during this period, please bring the product  
securely packaged in its original container or an equivalent, along with proof of  
the date of original purchase, to your Newcon Dealer. Newcon will, replace or  
repair (or at its option replace), the product or part thereof, which, on inspection  
by Newcon, is found to be defective in materials or workmanship.  
What This Warranty Does Not Cover:  
NEWCON is not responsible for warranty service should the product fail to be  
properly maintained or fail to function properly as a result of misuse, abuse,  
improper installation, neglect, damage caused by disasters such as fire, flood,  
lightning, improper electrical current, or service other than by a NEWCON  
Authorized Service. Postage, insurance, or shipping costs incurred in presenting  
your NEWCON product for warranty service are your responsibility. Please  
include a cheque or money order made out to NEWCON OPTIK for the amount  
of $15.00 to cover shipping and handling within Canada or the U.S.A. Shipping  
to other destinations will be done at the customer’s expense.  
8. Customer Support  
Should you experience any difficulties with your Newcon OPTIK product, consult  
the enclosed manual. If the problem remains unresolved, contact our customer  
support department at (416) 663-6963 or Toll free at 1-877-398-6666. Our  
operating hours are 9am-5pm, Monday - Friday, standard East time. At no time  
should equipment be sent back to Newcon without following the instructions of  
our technical support department.  
Newcon accepts no responsibility for unauthorized returns.  
To locate the NEWCON Authorized Dealer call:  
Tel: (416) 663-6963 Fax: (416) 663-9065  
INTERNET: http://WWW.NEWCON-OPTIK.COM  
The defective products should be shipped to:  
In USA: 3310 Prospect Ave. Cleveland, OH 44115  
From other countries : 1183 Finch Ave. W., Suite 302, Toronto, ON M3J 2G2  
Page 53  
NVS 6  
MANUAL  
Page 54  

PYLE Audio View Series PLTVRDIN65 User Manual
PoGo Products T1 User Manual
Philips R6B4A210 User Manual
Panasonic Camcorder DMC SZ9 User Manual
Motorola H780 User Manual
Miller Camera Support 1036 User Manual
Metz TG 73 100 MT User Manual
Lochinvar SOLUTION CB 075 User Manual
Kenwood KDC W4537UG User Manual
Kenwood KDC BT948HD User Manual