It appears to be true. I zeroed the meter. I tried the X1 setting on my abdomen (maximum tissue with blood in it) which gave between .01 and .02 roentgens/hour, and barely off the 0 on the floor, which is about what I would expect for whatever quantity they injected me with about 5 hours ago. (i think she said it was about 10 microcuries of Technetium-99.)
At first guess .01 r/hr seems plausible. Unfortunately, roentgens are from a Civil Defense and public safety standpoint, obsolete. REMs, or roentgens equivalent mammal are a bit smaller than roentgens.
"The dose of radiation expected to cause death to 50 percent of an exposed population within 30 days (LD 50/30). Typically, the LD 50/30 is in the range from 400 to 450 rem (4 to 5 sieverts) received over a very short period."
You gotta be pretty "Hot" to tickle the survey meter. A CDV 700 is a lot more sensitive, the 700 uses a Geiger tube
ReplyDeleteA CDV 715 or 720 survey meter is for a much more high energy environment...it uses an Ion Chamber that will work where an Geiger tube would become saturated. . Not sure your dose would do more that maybe make the meter move. Much less sensitive and takes more energy to trigger.
CDV-710.
DeleteSame thing, essentially. Just a different model.... It is a Survey meter rather than a low level geiger counter. Still an Ion chamber...less sensitive.
DeleteIf you are getting a reading on a Civil Defense survey meter you need to think hard about finding somewhere else to be.....
And I do wish I had thought of this when I had MY nuclear stress test last month. We do know that my heart's good and strong and in the right place. ;)
ReplyDeleteHad that meter calibrated lately?
ReplyDelete