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Radiation Detector CDV-715

 
Anonymous Coward
User ID: 1292606
United States
03/22/2011 11:58 PM
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Radiation Detector CDV-715
Just got this instrument today.

I followed all the instructions.

My current location is about 3 miles off of the coast, South Bay, CA area.

I do NOT know if this instrument is calibrated properly?

I zeroed it, and did a circuit check per instructions.

It is currently reading 2.2 r/hr on the X1 setting.

Any comments would be appreciated by people in the know.

Thanks.
Anonymous Coward
User ID: 555241
United States
03/23/2011 12:03 AM
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Re: Radiation Detector CDV-715
Is that a dosimeter? Measuring Roentgens?
Anonymous Coward
User ID: 555241
United States
03/23/2011 12:05 AM
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Re: Radiation Detector CDV-715
I dont think 2.2 is anything to worry about. But I need an expert opinion.
Anonymous Coward (OP)
User ID: 1292606
United States
03/23/2011 12:18 AM
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Re: Radiation Detector CDV-715
I got 3 of the old school radiation detectors, you know the bright yellow ones.

One is a CDV-717, the other is a CDV-715, and the last is a CDV-720.

I got all 3 for about $100.

I think they need to be professionally re-calibrated because they are giving me different readings.

Also they seem not to work properly when I switch to X1 and X0.1 .

Shit I think I need to pick up one of the more modern units.

The vendor did not lie, they definitely pass the Circuit Check, but as far as actually being useful, NOT hardly.

I might get them re-calibrated, but still pick up a brand new in the box more modern detector.

Thanks for you help.
Anonymous Coward (OP)
User ID: 1292606
United States
03/23/2011 12:19 AM
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Re: Radiation Detector CDV-715
By the way, these sites are pretty cool, and what I am relying upon for now.

[link to www.ustream.tv]

[link to www.blackcatsystems.com]

[link to www.radiationnetwork.com]
Anonymous Coward
User ID: 1296389
United States
03/23/2011 12:22 AM
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Re: Radiation Detector CDV-715
By the way, these sites are pretty cool, and what I am relying upon for now.

[link to www.ustream.tv]

[link to www.blackcatsystems.com]

[link to www.radiationnetwork.com]
 Quoting: Eliyah


Shill

Nice try though.
Anonymous Coward
User ID: 1296389
United States
03/23/2011 12:22 AM
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Re: Radiation Detector CDV-715
By the way, these sites are pretty cool, and what I am relying upon for now.

[link to www.ustream.tv]

[link to www.blackcatsystems.com]

[link to www.radiationnetwork.com]
 Quoting: Eliyah


Why would you try any of those when you have three of the real thing in your hand??
Anonymous Coward (OP)
User ID: 1292606
United States
03/23/2011 12:26 AM
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Re: Radiation Detector CDV-715
By the way, these sites are pretty cool, and what I am relying upon for now.

[link to www.ustream.tv]

[link to www.blackcatsystems.com]

[link to www.radiationnetwork.com]
 Quoting: Eliyah


Shill

Nice try though.
 Quoting: Anonymous Coward 1296389


Shill?

Are you high?

Read my posts.

I bought 3 surplus detectors, and they are NOT worth a shit.

I need to send them in to get them re-calibrated.

How am I a shill?

Also, buyers beware when you are buying SURPLUS detectors, yeah, they might pass the Circuit Check, but this does NOT mean they work or are accurate.

I would accept your apology, but I won't hold my breath.
Anonymous Coward
User ID: 1211743
United States
03/23/2011 12:27 AM
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Re: Radiation Detector CDV-715
By the way, these sites are pretty cool, and what I am relying upon for now.

[link to www.ustream.tv]

[link to www.blackcatsystems.com]

[link to www.radiationnetwork.com]
 Quoting: Eliyah


Shill

Nice try though.
 Quoting: Anonymous Coward 1296389


Go for 10,001, maybe you will reel in a large ram.with talons.
Anonymous Coward (OP)
User ID: 1292606
United States
03/23/2011 12:30 AM
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Re: Radiation Detector CDV-715
By the way, these sites are pretty cool, and what I am relying upon for now.

[link to www.ustream.tv]

[link to www.blackcatsystems.com]

[link to www.radiationnetwork.com]
 Quoting: Eliyah


Why would you try any of those when you have three of the real thing in your hand??
 Quoting: Anonymous Coward 1296389


Because what I currently have in my hands, are 3 SURPLUS old school detectors, that pass the self Circuit Check, but are not worth the metal they are made out of in regards to giving me accurate readings.

I will need to get them professionally re-calibrated for them to be useful.

That is why I am currently utilizing the other websites for now.

I think the $100 would have been more wisely put towards a more expensive modern detector that actually be of some use to me.
Anonymous Coward (OP)
User ID: 1292606
United States
03/23/2011 12:33 AM
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Re: Radiation Detector CDV-715
By the way, these sites are pretty cool, and what I am relying upon for now.

[link to www.ustream.tv]

[link to www.blackcatsystems.com]

[link to www.radiationnetwork.com]
 Quoting: Eliyah


Shill

Nice try though.
 Quoting: Anonymous Coward 1296389


Go for 10,001, maybe you will reel in a large ram.with talons.
 Quoting: Anonymous Coward 1211743


Is that code, or are you hearing voices in your head?
Girl Genius

User ID: 1133676
United States
03/23/2011 12:36 AM
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Re: Radiation Detector CDV-715
By the way, these sites are pretty cool, and what I am relying upon for now.

[link to www.ustream.tv]

[link to www.blackcatsystems.com]

[link to www.radiationnetwork.com]
 Quoting: Eliyah


Why would you try any of those when you have three of the real thing in your hand??
 Quoting: Anonymous Coward 1296389


Because what I currently have in my hands, are 3 SURPLUS old school detectors, that pass the self Circuit Check, but are not worth the metal they are made out of in regards to giving me accurate readings.

I will need to get them professionally re-calibrated for them to be useful.

That is why I am currently utilizing the other websites for now.

I think the $100 would have been more wisely put towards a more expensive modern detector that actually be of some use to me.
 Quoting: Eliyah


Thanks for sharing your experience. I talked my husband out of these because I did not think they would be accurate. Still looking for a reasonably priced detector, but I have been for the last few years and have not been able to find anything I'm willing to purchase yet.
For nothing is secret that will not be revealed…

:blue-faeries:
Anonymous Coward
User ID: 1283938
United States
03/23/2011 12:38 AM
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Re: Radiation Detector CDV-715
By the way, these sites are pretty cool, and what I am relying upon for now.

[link to www.ustream.tv]

[link to www.blackcatsystems.com]

[link to www.radiationnetwork.com]
 Quoting: Eliyah


Shill

Nice try though.
 Quoting: Anonymous Coward 1296389


shill X 2 hahaha If I wanted to watch replays I would go watch two and half men....
Anonymous Coward
User ID: 1308121
United States
03/23/2011 12:43 AM
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Re: Radiation Detector CDV-715
By the way, these sites are pretty cool, and what I am relying upon for now.

[link to www.ustream.tv]

[link to www.blackcatsystems.com]

[link to www.radiationnetwork.com]
 Quoting: Eliyah


Why would you try any of those when you have three of the real thing in your hand??
 Quoting: Anonymous Coward 1296389


Because what I currently have in my hands, are 3 SURPLUS old school detectors, that pass the self Circuit Check, but are not worth the metal they are made out of in regards to giving me accurate readings.

I will need to get them professionally re-calibrated for them to be useful.

That is why I am currently utilizing the other websites for now.

I think the $100 would have been more wisely put towards a more expensive modern detector that actually be of some use to me.
 Quoting: Eliyah


Thanks for sharing your experience. I talked my husband out of these because I did not think they would be accurate. Still looking for a reasonably priced detector, but I have been for the last few years and have not been able to find anything I'm willing to purchase yet.
 Quoting: Girl Genius


How funny! I can't imagine shopping for radiation detectors with my wife. If I even brought one home, it would be like the magic beans. HaHa.
Anonymous Coward
User ID: 1305196
Australia
03/23/2011 12:43 AM
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Re: Radiation Detector CDV-715
By the way, these sites are pretty cool, and what I am relying upon for now.

[link to www.ustream.tv]

[link to www.blackcatsystems.com]

[link to www.radiationnetwork.com]
 Quoting: Eliyah


Why would you try any of those when you have three of the real thing in your hand??
 Quoting: Anonymous Coward 1296389


Because what I currently have in my hands, are 3 SURPLUS old school detectors, that pass the self Circuit Check, but are not worth the metal they are made out of in regards to giving me accurate readings.

I will need to get them professionally re-calibrated for them to be useful.

That is why I am currently utilizing the other websites for now.

I think the $100 would have been more wisely put towards a more expensive modern detector that actually be of some use to me.
 Quoting: Eliyah


To calibrate them you need a calibrated one with a similar geometry. Most are simple and have only one adjustment.

Or you can use a disk like in this video. And watch out for the voltages, unlike the stoner in the video! There's 500V in there!.
Anonymous Coward
User ID: 1309963
United States
03/23/2011 12:43 AM
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Re: Radiation Detector CDV-715
I also have the 715, am in southern california. It is currently reading 2.2 rem per hr-same as yours.

yesterday and earlier today it was 3.6 rem/hr -then 3.4 and some readings of 3 rem/per hr.

So it would seem they are working correctly since we have the same readings.

Rems are equivalent to rads-it is the older measurement. This is not a geiger counter but an older cicil defense detector for use in the event of nuclear disasters and only reads gamma cesium-137 levels. It shows dose of rems per hour. The needle isn't supposed to move at all in normal conditions.

Just got this instrument today.

I followed all the instructions.

My current location is about 3 miles off of the coast, South Bay, CA area.

I do NOT know if this instrument is calibrated properly?

I zeroed it, and did a circuit check per instructions.

It is currently reading 2.2 r/hr on the X1 setting.

Any comments would be appreciated by people in the know.

Thanks.
 Quoting: Eliyah
Anonymous Coward (OP)
User ID: 1292606
United States
03/23/2011 12:48 AM
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Re: Radiation Detector CDV-715
By the way, these sites are pretty cool, and what I am relying upon for now.

[link to www.ustream.tv]

[link to www.blackcatsystems.com]

[link to www.radiationnetwork.com]
 Quoting: Eliyah


Why would you try any of those when you have three of the real thing in your hand??
 Quoting: Anonymous Coward 1296389


Because what I currently have in my hands, are 3 SURPLUS old school detectors, that pass the self Circuit Check, but are not worth the metal they are made out of in regards to giving me accurate readings.

I will need to get them professionally re-calibrated for them to be useful.

That is why I am currently utilizing the other websites for now.

I think the $100 would have been more wisely put towards a more expensive modern detector that actually be of some use to me.
 Quoting: Eliyah


Thanks for sharing your experience. I talked my husband out of these because I did not think they would be accurate. Still looking for a reasonably priced detector, but I have been for the last few years and have not been able to find anything I'm willing to purchase yet.
 Quoting: Girl Genius


This place sells the old school detectors and they are re-calibrated, but damn are they expensive.

[link to www.ki4u.com]

They also re-calibrate as well. It costs $78 total with return shipping. Sadly they are not accepting anymore business right now. :(

I will get mine re-calibrated by them at some point in the future. It still is cheaper than buying one of their re-calibrated units. I was able to get 3 detectors for $100, and it will cost me $78 to re-calibrate each one. So if I choose to do 3, I spent $100 dollars, plus $234 for re-calibration, for a total of $334. If I were to buy the same three units from them, it would have cost me over $800.
Anonymous Coward (OP)
User ID: 1292606
United States
03/23/2011 12:51 AM
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Re: Radiation Detector CDV-715
By the way, these sites are pretty cool, and what I am relying upon for now.

[link to www.ustream.tv]

[link to www.blackcatsystems.com]

[link to www.radiationnetwork.com]
 Quoting: Eliyah


Shill

Nice try though.
 Quoting: Anonymous Coward 1296389


shill X 2 hahaha If I wanted to watch replays I would go watch two and half men....
 Quoting: Anonymous Coward 1283938


I think you and Charley Sheen are on the same wavelength.

Winning Winning.

Seriously, how am I a shill.

Please explain. I am curious.
Girl Genius

User ID: 1133676
United States
03/23/2011 12:58 AM
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Re: Radiation Detector CDV-715
How funny! I can't imagine shopping for radiation detectors with my wife. If I even brought one home, it would be like the magic beans. HaHa.
 Quoting: Anonymous Coward 1308121


We both like gadgets and have lots of preps. Just can't find a decent model for a good price - and that was before Fukushima - forget about it now!

I do have about 30 or so pieces of uranium glass in my glass collection and always wanted to check them out. Plus some of our mineral specimens, possibly the meteorites, might have readings. Guess I'll have to wait a while till prices settle down to satisfy my curiosity :)
For nothing is secret that will not be revealed…

:blue-faeries:
Anonymous Coward (OP)
User ID: 1292606
United States
03/23/2011 12:58 AM
Report Abusive Post
Report Copyright Violation
Re: Radiation Detector CDV-715
By the way, these sites are pretty cool, and what I am relying upon for now.

[link to www.ustream.tv]

[link to www.blackcatsystems.com]

[link to www.radiationnetwork.com]
 Quoting: Eliyah


Why would you try any of those when you have three of the real thing in your hand??
 Quoting: Anonymous Coward 1296389


Because what I currently have in my hands, are 3 SURPLUS old school detectors, that pass the self Circuit Check, but are not worth the metal they are made out of in regards to giving me accurate readings.

I will need to get them professionally re-calibrated for them to be useful.

That is why I am currently utilizing the other websites for now.

I think the $100 would have been more wisely put towards a more expensive modern detector that actually be of some use to me.
 Quoting: Eliyah


To calibrate them you need a calibrated one with a similar geometry. Most are simple and have only one adjustment.

Or you can use a disk like in this video. And watch out for the voltages, unlike the stoner in the video! There's 500V in there!.

 Quoting: Anonymous Coward 1305196


Seems like a cool kid.

I think I will spend the $78 and have it done professionally.
Anonymous Coward
User ID: 1309963
United States
03/23/2011 01:00 AM
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Re: Radiation Detector CDV-715
...


Why would you try any of those when you have three of the real thing in your hand??
 Quoting: Anonymous Coward 1296389


Because what I currently have in my hands, are 3 SURPLUS old school detectors, that pass the self Circuit Check, but are not worth the metal they are made out of in regards to giving me accurate readings.

I will need to get them professionally re-calibrated for them to be useful.

That is why I am currently utilizing the other websites for now.

I think the $100 would have been more wisely put towards a more expensive modern detector that actually be of some use to me.
 Quoting: Eliyah


To calibrate them you need a calibrated one with a similar geometry. Most are simple and have only one adjustment.

Or you can use a disk like in this video. And watch out for the voltages, unlike the stoner in the video! There's 500V in there!.

 Quoting: Anonymous Coward 1305196


Seems like a cool kid.

I think I will spend the $78 and have it done professionally.
 Quoting: Eliyah


I don't think you need the CD-715 recalibrated. I am in so cal and am getting the exact same reading w/my Cd-715

it measures the dose in rads per hr exposure-rem is the same as rad
Anonymous Coward (OP)
User ID: 1292606
United States
03/23/2011 01:04 AM
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Re: Radiation Detector CDV-715
I also have the 715, am in southern california. It is currently reading 2.2 rem per hr-same as yours.

yesterday and earlier today it was 3.6 rem/hr -then 3.4 and some readings of 3 rem/per hr.

So it would seem they are working correctly since we have the same readings.

Rems are equivalent to rads-it is the older measurement. This is not a geiger counter but an older cicil defense detector for use in the event of nuclear disasters and only reads gamma cesium-137 levels. It shows dose of rems per hour. The needle isn't supposed to move at all in normal conditions.

Just got this instrument today.

I followed all the instructions.

My current location is about 3 miles off of the coast, South Bay, CA area.

I do NOT know if this instrument is calibrated properly?

I zeroed it, and did a circuit check per instructions.

It is currently reading 2.2 r/hr on the X1 setting.

Any comments would be appreciated by people in the know.

Thanks.
 Quoting: Eliyah

 Quoting: Anonymous Coward 1309963


Thank you!

I have not checked my 720 yet. I need to buy some more D batteries.

The 717 I have is not working properly.

The 715 currently reads 2.3 at the X1 setting, but when I switch it to the X0.1 it goes off the chart, past 5.

What is yours currently reading and what does it read when you switch it to X0.1?

Thanks.
Anonymous Coward
User ID: 1309963
United States
03/23/2011 01:11 AM
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Re: Radiation Detector CDV-715
I also have the 715, am in southern california. It is currently reading 2.2 rem per hr-same as yours.

yesterday and earlier today it was 3.6 rem/hr -then 3.4 and some readings of 3 rem/per hr.

So it would seem they are working correctly since we have the same readings.

Rems are equivalent to rads-it is the older measurement. This is not a geiger counter but an older cicil defense detector for use in the event of nuclear disasters and only reads gamma cesium-137 levels. It shows dose of rems per hour. The needle isn't supposed to move at all in normal conditions.

Just got this instrument today.

I followed all the instructions.

My current location is about 3 miles off of the coast, South Bay, CA area.

I do NOT know if this instrument is calibrated properly?

I zeroed it, and did a circuit check per instructions.

It is currently reading 2.2 r/hr on the X1 setting.

Any comments would be appreciated by people in the know.

Thanks.
 Quoting: Eliyah

 Quoting: Anonymous Coward 1309963


Thank you!

I have not checked my 720 yet. I need to buy some more D batteries.

The 717 I have is not working properly.

The 715 currently reads 2.3 at the X1 setting, but when I switch it to the X0.1 it goes off the chart, past 5.

What is yours currently reading and what does it read when you switch it to X0.1?

Thanks.
 Quoting: Eliyah


It is now 1.9 rad an hr exposure-I am running a hepa filter w/zeolite so I may have slightly lower level than you-when I checked earlier it was 2.2 exact as yours.

This afternoon it was 3.6 YIKES.

When I switch it to X0.1 it goes off the chart, this is because if you took .01 times 5 it would be MUCH higher than 5-off the charts

Those levels x10, x100 are so you can detect a smaller amount if you need to-unfortunately are levels are so high we can use the x1 setting, as in 2.2 is 2.2 rads an hour exposure to your body-you don't times it by anything

most doses are much lower so they have more sensitive settings for those

hope that helps
Anonymous Coward
User ID: 1276620
Canada
03/23/2011 01:23 AM
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Re: Radiation Detector CDV-715
OP, your detector is not calibrated properly. You'd have to send it off to some organization that can calibrate it. Your readings are well over three times as bad as what was seen in fukushima at its peak. 3 r/hour would make a person seriously ill if exposed for a day or so. longer and it could be fatal. Here is an interesting article:

[link to getstopic.com]
HEAVYMETAL_MACHINIST

User ID: 1032776
United States
03/23/2011 01:26 AM
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Re: Radiation Detector CDV-715
I'm up here in Oregon. Just bought 2 of the same survey meters. After warm up and setting the zero, I switch it to X0.1, and I am reading .2 on the scale. Switch to X1. and it drops to 0.0.

Maybe you guys are getting hit? Or maybe both of mine are a POS. I wish I could test it on something harmless.

To me, it really doesn't matter if it reads correct though. I mean, we did buy late 60's early 70's electronic devices. I just want a base line, and if it goes crazy, I want to see it before I feel it.

When you bring it out into the sun, shouldn't it go up....at least a little?
Anonymous Coward
User ID: 1309963
United States
03/23/2011 01:26 AM
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Re: Radiation Detector CDV-715
OP, your detector is not calibrated properly. You'd have to send it off to some organization that can calibrate it. Your readings are well over three times as bad as what was seen in fukushima at its peak. 3 r/hour would make a person seriously ill if exposed for a day or so. longer and it could be fatal. Here is an interesting article:

[link to getstopic.com]
 Quoting: Anonymous Coward 1276620


Actually it could take a month before people fall ill at these readings...

you only fall ill in one day if you get 500 rads in a day-otherwise takes longer

Expected effects from "Fallout Radiation"- R - Sickness.

000 - 200 R - Vomiting and nausea for about one day.

200 - 300 R - Same, about 20% Deaths in 2 to 6 weeks.

300 - 400 R - Same, about 50% Deaths WITHIN 1 month.

400 - 600 R - Same, sick within 5 hours, IN ALL PERSONS

About 75% Deaths, less than 1 month.

600 - 800 R - Everyone sick within 2 hours, FEW survivors.

800 - 5000 R - Sick WITHIN the hour, ALL Fatal within 1 week.

Repeated "Sub-lethal" Exposures add up ! ! Don't get more than

25 - R - in any "one" (1) DAY

125 R - in ANY (1) WEEK, or you may get sick.

300 R - in any 3 MONTHS, or your getting poisoned to die. Your body can't repair itself, fast enough.
Anonymous Coward (OP)
User ID: 1292606
United States
03/23/2011 01:32 AM
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Re: Radiation Detector CDV-715
OP, your detector is not calibrated properly. You'd have to send it off to some organization that can calibrate it. Your readings are well over three times as bad as what was seen in fukushima at its peak. 3 r/hour would make a person seriously ill if exposed for a day or so. longer and it could be fatal. Here is an interesting article:

[link to getstopic.com]
 Quoting: Anonymous Coward 1276620


We would need to figure out what a REM is in relation to a RAD, and then do some converting. ???

What a fucked world we live in. I means seriously when we have to worry about shit like this, etc...

I wanted to say thanks to those helping me out.

ohyeah
Anonymous Coward
User ID: 1276620
Canada
03/23/2011 01:35 AM
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Re: Radiation Detector CDV-715
OP, your detector is not calibrated properly. You'd have to send it off to some organization that can calibrate it. Your readings are well over three times as bad as what was seen in fukushima at its peak. 3 r/hour would make a person seriously ill if exposed for a day or so. longer and it could be fatal. Here is an interesting article:

[link to getstopic.com]
 Quoting: Anonymous Coward 1276620


We would need to figure out what a REM is in relation to a RAD, and then do some converting.
 Quoting: Eliyah


Ok, I see what you're talking about. There is quite a difference. This article clears it up.

[link to www.imagesco.com]
Anonymous Coward
User ID: 1309963
United States
03/23/2011 01:37 AM
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Re: Radiation Detector CDV-715
OP, your detector is not calibrated properly. You'd have to send it off to some organization that can calibrate it. Your readings are well over three times as bad as what was seen in fukushima at its peak. 3 r/hour would make a person seriously ill if exposed for a day or so. longer and it could be fatal. Here is an interesting article:

[link to getstopic.com]
 Quoting: Anonymous Coward 1276620


We would need to figure out what a REM is in relation to a RAD, and then do some converting.
 Quoting: Eliyah


A rem is equivalent to a rad:

[link to www.stevequayle.com]

For gamma rays and beta particles, 1 rad of exposure results in 1 rem of dose.

The CD-715 measures the gamma and for gamma 1 rad of exposure results in 1 rem of dose.

I am hoping both our machines are calibrated wrong in exactly the same way!

did you zero yours out first?
Anonymous Coward (OP)
User ID: 1292606
United States
03/23/2011 01:39 AM
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Re: Radiation Detector CDV-715
By the way, these sites are pretty cool, and what I am relying upon for now.

[link to www.ustream.tv]

[link to www.blackcatsystems.com]

[link to www.radiationnetwork.com]
 Quoting: Eliyah


Why would you try any of those when you have three of the real thing in your hand??
 Quoting: Anonymous Coward 1296389


Because what I currently have in my hands, are 3 SURPLUS old school detectors, that pass the self Circuit Check, but are not worth the metal they are made out of in regards to giving me accurate readings.

I will need to get them professionally re-calibrated for them to be useful.

That is why I am currently utilizing the other websites for now.

I think the $100 would have been more wisely put towards a more expensive modern detector that actually be of some use to me.
 Quoting: Eliyah


Thanks for sharing your experience. I talked my husband out of these because I did not think they would be accurate. Still looking for a reasonably priced detector, but I have been for the last few years and have not been able to find anything I'm willing to purchase yet.
 Quoting: Girl Genius


If you do pick up the old school detector for a good price, it can be re-calibrated for $78.
Anonymous Coward
User ID: 1276620
Canada
03/23/2011 01:42 AM
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Re: Radiation Detector CDV-715
OP, your detector is not calibrated properly. You'd have to send it off to some organization that can calibrate it. Your readings are well over three times as bad as what was seen in fukushima at its peak. 3 r/hour would make a person seriously ill if exposed for a day or so. longer and it could be fatal. Here is an interesting article:

[link to getstopic.com]
 Quoting: Anonymous Coward 1276620


We would need to figure out what a REM is in relation to a RAD, and then do some converting.
 Quoting: Eliyah


Ok, I see what you're talking about. There is quite a difference. This article clears it up.

[link to www.imagesco.com]
 Quoting: Anonymous Coward 1276620


Actually the only difference is that one is actual level and the other is the absorbed amount. So, they could be the same as long as the radiation was absorbed.

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