radiological survey meter

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ok--so I dove over the edge---saw this thing and got it---after buying it I see the manufactoring manual states it was made in 62---(groan) THEN tried to read the instructions and am stupified---I guess I expected something like, "heads up", "tails up", "run like hell"--does anyone know anything about these meters? ( I am definitely on a y2k thingamabob diet from now on.)

-- catherine plamondon (souldancer@pop.spkn.uswest.net), August 13, 1999

Answers

I may have an instruction manual from when I helped the Civil Defense Warden were I worked in the late 70s. Whats the model #? If its something like CDV 715 (Model 1A) I can probably help.

There ISN"T a lot to it, you just need to understand the scales used and what the symbols mean.

-- Jon Johnson (narnia4@usa.net), August 13, 1999.


catherine;

Check out this thread, I talk about Rad Monitors.

http://www.greenspun.com/bboard/q-and-a-fetch-msg.tcl?msg_id=001BOi

If you have further questions after reading this please post here, or email me. I will try to answer your questions.

Good Luck!

-- helium (heliumavid@yahoo.com), August 14, 1999.


If you read heliums thread, it should help with some questions.

For your CDV 715: It has 4 scales .1x,1x,10x,100x. The meter goes from 0 to 5. So, after you put the D battery in and turn it on, if you have it on the 1x scale and it reads "4", you are exposed to 4 rads/hour. If you had it on the .1x and it read 4 that means .4 rads/hour, on the 100 scale and 4 = 400 rads/hour.

The Zeroing device: when set to "zero" you turn the knob in the lower corner until the display needle is on zero (with no radiation sources around).

Calibration: could be a problem. If you have contacts at a University, they can probably arrange something for you, although I'm not sure how you do the calibration myself --- it may not need it due to the zero feature. Perhaps helium can address that. Even if you can't calibrate it, if you can read a known source (thats why I suggested a University) you would know about how to interpet the readings.

lethal Dose= 650 rads (near 100% mortality)

median = 450 rads (50% mortality)

moderate = 100 - 300 rads (recovery likely)

Low = < 100 rads (no significant health effects)(says the old book).

Accuracy is supposed to be within 15%.

-- Jon Johnson (narnia4@usa.net), August 14, 1999.


ugg...

Look up http://home.earthlink.net/~kenseger/surv/surv.htm and click the 1HRRADS text to get a better picture of how the duration of the exposure makes a HUGE difference in the lethality of the exposure.

If you read all of the texts I have on my website you'll be a radiation expert.

"An 'expert' is merely an individual that knows more on a given subject than 95% of the general population." - Mark (Samual Clements) Twain

-- Ken Seger (kenseger@earthlink.net), August 15, 1999.


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