Re: Re[2]: Answers to Electronic Dosimetry Operability Checks

["Sandy Perle" <sandyfl@ix.netcom.com>]

It is a very important point that Paul made, regarding the inability 
to hear an alarm in a very noisy area. An EPD with a pager capability 
of both a "chirp" and a "vibrate" mode would be very helpful, and 
possibly a visual indication as well.

I was interested in Jamie's reply from a vendor that stated that they 
don't need to test the alarm for they are very reliable. I would 
state that as far as I know, no electronic equipment is or 
approaches 100% reliability. If that were true there would be no need 
for a QA/QC program. Anyone who says that there is NO need to check 
their product is probably the first product that I would forego the 
statistical sampling method and do a 100% inspection. Maybe what 
they are really saying is that when there arec no checks, there are 
no failures. The absence of anything doesn't mean that it isn't 
there. Common sense dictates that quality checks be made to preclude 
any serious consequences from occuring, especially when aging EPDs, 
or any instrument, are used in inventory. Just an opinion from one who 
has conducted several EPD NVLAP Assessments and had our own program 
assessed as well.. There are problems with all EPDs (varying degrees), and 
everyone needs to understand the characteristics of the specific EPD 
they use.
understand them and take the appropriate 

Sandy Perle
Director, Technical Operations
ICN Dosimetry Services Division
Phone: (714) 545-0100 Ext. 2306
FAX: (714) 668-3149
Telex: 68-55-80
E-mail: sandyfl@ix.netcom.com

Homepages:
http://www.netcom.com/~sandyfl/home.html
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