6. Loosen the clamp knobs and the lever clamp. 7. Store the goggles, batteries, and accessories in the cases, making sure they are properly positioned to close, and then latch the carrying case. 8. Store the carrying case in the storage case if the goggles are to be placed in prolonged storage. Latch the storage  case. AN/PVS-11 Pocketscope The  pocketscope  (fig.  2-19)  is  a  hand-held, submersible NVS equipped with either a 1X or 3X magnification lens used for short-range observation in either passive or active mode. The power source is two 1.5V AA batteries with a life of 40 hours. This NVS is provided with an IR source for close-up viewing. It can illuminate a man-size target at 15 meters in active mode. The unit also has an optional adapter for a 35mm  camera  or  closed  circuit  television. OPERATION This NVS is similar in operation to other NVSs used by the Navy. The same precautions should be exercised  with  it  as  with  the  others.  For  passive operation, set the OFF-ON-PULL IR switch to on and observe that a green glow is visible in the eyepiece. Adjust the eyepiece and objective lens for proper focus. The pocketscope is ready for passive night vision  operation.  For  IR  illuminator  mode  (active), pull out the OFF-ON-PULL IR switch and rotate it to the PULL-IR position. Observe that the area in the immediate front of the pocketscope is illuminated. CAUTION The IR source is a light that is invisible to the unaided eye. However, the light from the illuminator  can  be  detected  by  opposing forces  using  NVSs. Maintenance Routine maintenance for night vision goggles and the pocketscope is basically the same as for the Mk 37 and  AN/PVS-8.  Scheduled  maintenance  is  to  be performed as described on current MRCs to discover and   correct   any   defects   before   they   result   in operational failure. If any part is defective or missing, other than the parts authorized for replacement or repair   at   the   organization   level,   requisition Figure 2-19.—AN/PVS-11A pocketscope. replacement  units.  Review  the  technical  manual before  performing  any  maintenance  on  night  vision devices. GENERAL SAFETY PRECAUTIONS Night  vision  devices  are  precision  electro-optical instruments and must be handled carefully at all times. The image intensifier assembly phosphor screen contains  toxic  material.  If  an  assembly  becomes broken, be extremely careful to avoid inhalation of the phosphor screen material, and do NOT allow it to come in contact with the mouth or open skin wounds. If the phosphor screen material comes into contact with the skin, wash immediately with soap and water. If phosphor screen material is swallowed or inhaled, induce vomiting and seek medical help. The  batteries  used  in  NVSs  require  special handling   to   avoid   possible   physical   harm   or equipment  damage.  Return  all  used  or  damaged batteries   to   the   property   disposal   officer.   The following are the batteries used in NVS: 1. BA 1567/U battery. 2. Alkaline Battery BA 3058/U. 3.  Lithium  Battery  BA  5567/U.  This  battery contains sulfur dioxide gas under pressure. Do not heat, puncture, disassemble, or otherwise tamper with the battery.   Turn   off   the   equipment   if   the   battery compartment  becomes  too  hot;  wait  until  batteries  have cooled before removing them. Batteries have a safety vent to prevent explosion. When they are venting gas, you will smell gas, your eyes may become irritated, or 2-19