Инструкции По Обслуживанию для Apple classic ii.performa 200

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 Adjustments
Light Meter Setup - 4
 
readings, verify the 
readings with a known-good 
light meter or photometer. 
Also check the age of the R77 
light meter by its four-digit 
manufacturing date stamp 
(such as 0398 for March 
1998). 
 
Caution:
 
  Dropping the 
meter can permanently 
damage its accuracy. A 
shock-damaged meter might 
read incorrectly or its 
pointer may not drop to 
zero.