N F-905 series are of red lighting source upon 650 nm conductor 
for laser enitter, drived by constant current source to emit regular 
red light. Connecting the interface in multi-mode or singal mode 
starts up fiber malfunction testing.
It is a indispensible tool in respects of fiber engineering,
maintaining,producing and studying of light components .

Brief Introduction:

Fiber Malfunction Tester

Feature:

1.FC/SC/ST ports are changeable and available to connect 
   detector against light leak or poor contact,further to greatly 
   decrease possible radiation to user for safety.  
2.The  light  emitted  at  LD  TRAP  is  taken  on  long reach and 
   powerful spotlight.
3.Macro energy, Strong signal, Sufficient lighting, High accuracy.
4.LED lighting for working in darkness.
5.Simple buttons for convenient using.
6.Push-pull dust cover and rubber bar for comfortable holding.

Useage:

1.Open battries cover,install in 1.5V batteries on correct positive 
   and negative terminals, close batteries cover . ( Notice:do not 
   reverse batteries)
2.Open dust cover,and pull out the rubber plug in FC port,turn on 
   the power with power indicator lamp working.Then, press "Red 
   Light" key to start up red light from port  (Notice: Do not look 
   directly at lighting port against hurting eyes.)
3.Press"Red Light" key once more to change into lighting impulse 
   mode for constant flashing. (Impulse frewuency in range of 2–
   3Hz or 9 Hz)
4.Press "Red Light" key again to turn off lighting source, (switch 
   mode :Continuum-Impulse-Continuum).
5.Connecting fiber into port and pressing " Red Light " key to 
   choose switch mode (Continuum or Impulse).