GOLD CREST Model PR-95 User manual

Cadmium Sulfide (CdS)

      Cds is a Semi-Conductive material in which the resistance
       level changes with the intensity of the light it  receives.
     Not like conventional selenium photocells, CdS needs
      Mercury Battery to work the meter. So the GOLDCREST
     CdS meter has a 1.3-Volt mercury battery and built.in
      mercury battery checker.

       CdS has an excellent qualities of resistance against heat
      and moisture and the  lif e is almost semi.permanent   .

       CdS has remarkably high sensitivity several hundred times
       greater than conventional selenium photocells.

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How to Use GOLDCREST cds Exposure Meter
            1.  Acertain the speed of the film you use in your camera,
                                                               package.         indicated in ASA numbers or DIN on the film
        Then set the ASA or DIN numbers of the meter.
          2. Make sure.the exposure needle is on Zero Ajust silver
        dot at the OFF. Otherwise you have to adjust the Zero
        Ajustment screw on the back.                                                                                                                                  il          3. Face the light window squarely at the subject , and turn
         the switch on Low (in Black)                                                                              {          4. For example if the needle stays on "F", you just move
         the outer ring so that the Exposure Matching Pointer
         points the letter " F" on the outside plate.
        Then you can get the desired shutter speed and lens
         aperture on the reading scales.
      5. lf the Exposure Needle swings up to extremely right at
                                                                 and         the Low level , you have to turn the switch to High,
        you will see the letters in Red from "H" to 3'0" in the
         window
        The reading rnethod is same as in Low level .         '

Light Value System (Exposure Value System)
           Use the LV scale if your camera is equipped with LV
           (EV) shutter. Work the meter in the same way as explained
             before, and take the number which appears in the LV Win-
           dow for your camera setting. &rtk-9   ' us
                     lf you are using ASA lQQmfilm and the LV Window shows
            t4, set your camera shutter to LV. 14. lf you decide to[\l\            change the lens-stop to f.8, the shutter speed automatically
            moves up to l/250 second, or if you close it down to fll,
            the shutter will automatically slow down to l/125 second.
          0n the other hand if the shutter speed is slowed down to
                    l/ 60 second, the lens will close down to  f 16, or if  it  is
            speeded up to l/500 second, the lens will  automatically
            open out to f5.6.

used.               In U. S. A. Mallroy RM-625R and RM-630R can  . be
         The original built-in mercury battery we are using is
            Toshiba TH-MC
                       g,rltoc, c.8


 .D      I             Turn the slotted Screw door counter.clockwise by a coin,
!tl          and replace the  f resh battery with the plus marking ( + )
            facing outside. Then turn the switch OFF and see the
             exposure needle stays on the Zero Ajust silver dot.

     Note:
            Don't forget to  put  the Switch'OFF" for storage,
            otherwise the   I if e  of  mercury battery shall be shorten
               considerably.