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for proper alarming. A butane lighter or "Zippo" lighter can be used as Al source to check for <br /> Lproper alarming of the CGI element. I E <br /> { <br /> �{ The HNU-and other--PID'sShould -periodically--be-exposed to a magic marker or Zippo lighter <br /> to check response. A butane lighter or magic marker works well to demonstrate that the PID <br /> is responding. These "response checks" are key to providing confidence to the user that the <br /> C instrument is at least functioning and responding to contaminants. The same <br /> type of response <br /> check can be performed with the radiation meter using low level test sources with the <br /> appropriate type of probe (alpha, beta, or gamma). <br /> I� <br /> C <br /> C <br /> G <br /> C <br /> i E <br /> - i <br /> Revised: 11/93 HS-510-4 IWoodward-Clyde f <br /> if <br />