No idea.? There are some mixed mineral samples,? trinitite, lantern mantles,? radium bridge markers, couple big F3 smoke detectors etc in a couple boxes back in the corner.? And about 800# of remelted lead from recovered bullets sitting on the floor.?
I tried to take pictures at beginning and end for getting accurate run time,? and it does report the volume of flow over the run period.?
Definitely agree on getting a straight up comparison.? That's part of why I figured you might want to have a few of these to try.?
On Fri, Jul 1, 2022, 3:50 PM Dude < dfemer@...> wrote:
Nick where is the Po212 at
8.78 MeV coming from?
It will be useful when we
post data to give all the parameters of that run. The spectra is really says
nothing without knowing the peak count, count time and volume sampled, so label
those files with respect to the Radon counts. Sample time is flow rate (l/min)
divided by 1000* M^3 volume.
When comparing filters we
need to run in the same Rn concentration and for the same flow rate and time.
I’ll post the PTFE filter
data after a couple of hours.
Dud
?
?
This was with a filter I made by folding card stock in half and
sandwiching a piece of Geo's filter roll inside.? I punched 1" holes
with a gasket punch.? ?Note that I did not punch the two small holes
near the top as I don't see anything in there that would even know they are
there.?
I was thinking you could even just swap the actual filter material and
reuse the paper card,? but it's possible for that to get
contaminated.? ?I didn't measure the size of the opening in the
sensor head.?
?
On Fri, Jul 1, 2022, 1:47 PM Dude <dfemer@...>
wrote:
Shape looks good . what filters are you using? The HQ FP5211-47
and the FPAE-47 give a filter error and restricted flow. From a GAST vac pump.
(26lpm) The PTFE5u work ok (30lpm) in the metal carrier. But shows a filter
error due to the carrier without 2 dot holes.. I'll send pictures later.
Dud
?
?
?
I suppose
so!? Like I said, the exhaust fan was on, so it would be pulling some air
through leaks.? How do you feel about the spectrum shape now?? If you
let me know soon enough, I could maybe knock out a few filter cards for you
today but I have a lot of prep to do for driving west tomorrow.
?
On Fri, Jul 1,
2022 at 10:35 AM Dude <dfemer@...>
wrote:
Nick,
With only 0.2 pCi/L after 4.3 hrs says you don’t have much of a
Radon problem or that mancave is pretty well aerated.
Dud
?
?
Some pics at
start,? after an hour,? and then a few hours later.?
Rough side of filter
material facing up this time!?
|
Nick where is the Po212 at
8.78 MeV coming from?
It will be useful when we
post data to give all the parameters of that run. The spectra is really says
nothing without knowing the peak count, count time and volume sampled, so label
those files with respect to the Radon counts. Sample time is flow rate (l/min)
divided by 1000* M^3 volume.
When comparing filters we
need to run in the same Rn concentration and for the same flow rate and time.
I’ll post the PTFE filter
data after a couple of hours.
Dud
?
?
This was with a filter I made by folding card stock in half and
sandwiching a piece of Geo's filter roll inside.? I punched 1" holes
with a gasket punch.? ?Note that I did not punch the two small holes
near the top as I don't see anything in there that would even know they are
there.?
I was thinking you could even just swap the actual filter material and
reuse the paper card,? but it's possible for that to get
contaminated.? ?I didn't measure the size of the opening in the
sensor head.?
?
toggle quoted message
Show quoted text
On Fri, Jul 1, 2022, 1:47 PM Dude <dfemer@...>
wrote:
Shape looks good . what filters are you using? The HQ FP5211-47
and the FPAE-47 give a filter error and restricted flow. From a GAST vac pump.
(26lpm) The PTFE5u work ok (30lpm) in the metal carrier. But shows a filter
error due to the carrier without 2 dot holes.. I'll send pictures later.
Dud
?
?
?
I suppose
so!? Like I said, the exhaust fan was on, so it would be pulling some air
through leaks.? How do you feel about the spectrum shape now?? If you
let me know soon enough, I could maybe knock out a few filter cards for you
today but I have a lot of prep to do for driving west tomorrow.
?
On Fri, Jul 1,
2022 at 10:35 AM Dude <dfemer@...>
wrote:
Nick,
With only 0.2 pCi/L after 4.3 hrs says you don’t have much of a
Radon problem or that mancave is pretty well aerated.
Dud
?
?
Some pics at
start,? after an hour,? and then a few hours later.?
Rough side of filter
material facing up this time!?
|
This was with a filter I made by folding card stock in half and sandwiching a piece of Geo's filter roll inside.? I punched 1" holes with a gasket punch.? ?Note that I did not punch the two small holes near the top as I don't see anything in there that would even know they are there.?
I was thinking you could even just swap the actual filter material and reuse the paper card,? but it's possible for that to get contaminated.? ?I didn't measure the size of the opening in the sensor head.?
On Fri, Jul 1, 2022, 1:47 PM Dude < dfemer@...> wrote:
Shape looks good . what
filters are you using? The HQ FP5211-47 and the FPAE-47 give a filter error and
restricted flow. From a GAST vac pump. (26lpm) The PTFE5u work ok (30lpm) in
the metal carrier. But shows a filter error due to the carrier without 2 dot
holes.. I'll send pictures later.
Dud
?
?
?
I suppose so!? Like I said, the exhaust fan was on, so it would be
pulling some air through leaks.? How do you feel about the spectrum shape
now?? If you let me know soon enough, I could maybe knock out a few filter
cards for you today but I have a lot of prep to do for driving west tomorrow.
?
On Fri, Jul 1, 2022 at 10:35 AM Dude <dfemer@...>
wrote:
Nick,
With only 0.2 pCi/L after 4.3 hrs says you don’t have much of a
Radon problem or that mancave is pretty well aerated.
Dud
?
?
Some pics at
start,? after an hour,? and then a few hours later.?
Rough side of
filter material facing up this time!?
|
Shape looks good . what
filters are you using? The HQ FP5211-47 and the FPAE-47 give a filter error and
restricted flow. From a GAST vac pump. (26lpm) The PTFE5u work ok (30lpm) in
the metal carrier. But shows a filter error due to the carrier without 2 dot
holes.. I'll send pictures later.
Dud
?
?
?
I suppose so!? Like I said, the exhaust fan was on, so it would be
pulling some air through leaks.? How do you feel about the spectrum shape
now?? If you let me know soon enough, I could maybe knock out a few filter
cards for you today but I have a lot of prep to do for driving west tomorrow.
?
toggle quoted message
Show quoted text
On Fri, Jul 1, 2022 at 10:35 AM Dude <dfemer@...>
wrote:
Nick,
With only 0.2 pCi/L after 4.3 hrs says you don’t have much of a
Radon problem or that mancave is pretty well aerated.
Dud
?
?
Some pics at
start,? after an hour,? and then a few hours later.?
Rough side of
filter material facing up this time!?
|
I suppose so!? Like I said, the exhaust fan was on, so it would be pulling some air through leaks.? How do you feel about the spectrum shape now?? If you let me know soon enough, I could maybe knock out a few filter cards for you today but I have a lot of prep to do for driving west tomorrow.
On Fri, Jul 1, 2022 at 10:35 AM Dude < dfemer@...> wrote:
Nick,
With only 0.2 pCi/L after
4.3 hrs says you don’t have much of a Radon problem or that mancave is pretty
well aerated.
Dud
?
?
Some pics at start,? after an hour,? and then a few hours
later.?
Rough side of filter material facing up this time!?
|
Nick,
With only 0.2 pCi/L after
4.3 hrs says you don’t have much of a Radon problem or that mancave is pretty
well aerated.
Dud
?
?
Some pics at start,? after an hour,? and then a few hours
later.?
Rough side of filter material facing up this time!?
|
Some pics at start,? after an hour,? and then a few hours later.?
Rough side of filter material facing up this time!?
|
New run on Smartcam with Geo filter
Exhaust fan has been running,? but I kept the door closed except going in and out a few times.?
|
Re: Geo's filter material trial
On a plane to Lexington (well,? Atlanta first) and flying back Wednesday.? When I pulled the card out after posting,? I realized I'd instants the filter material smooth side up...? Will run again the other way after I get back.? ?Hoping I can take Friday off as planned to get ready for the long drive.? ?If that works out,? I should be able to run some more that day too.
It's been close to 100 in the shop lately,? and the stainless cabinet seems to be very hot to the touch.? ?I'll do a temp check,? maybe take thermal images...
I also plan to pull the CF card out of #2 and copy the contents to laptop before changing settings.? ?It was set on eastern time and was off by about half an hour.?
While wiring that one,? I noticed the data line going from the RJ45 on the bottom runs to a connector on the bottom of the circuit board on the right side,? about a third of the way down.? ?There's also an unused RJ45 on top of the circuit board under the black plastic shield which is not visible normally.?
On filter cards,? I need to find a better way to punch them for cleaner 1" holes.? I do have a cool little punch set of i can find it that might be better than the gasket punch or might just need a better backup using that one.? Haven't tried the arbor press yet either,? just popping it with a rubber mallet.
Here it is.? ?Bummer only goes to 3/4"...
Not sure if would work better anyway in paper.? Though my machining skills are strictly amateur metal butcher class,? maybe I could make something similar for 1".
On Mon, Jun 27, 2022, 11:51 AM Dude < dfemer@...> wrote:
|
Re: Geo's filter material trial
Nick,
A rather strange spectra.
The Po-214 at 7.6 Mev has a strange shape and the beta down somewhere around
1.8 is distorting the curve fit. I wonder if that has an effect on the Rn calc and
where is the Beta coming from? These tails don’t look right. How dirty was this
filter?. Re run this again with the proper filter same time same closed
conditions. I suspect it’s possible that Geo filter material is for airborne
particulates and gamma and may not be suitable for alpha work.
Dud
?
?
?
?
?
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[dfemer@...]
|
Geo's filter material trial
Ran this over 5.5 hours.? ?Shed exhaust fan off, closed up overnight,? door closed during the entire run except for going in or out,? so minimal air exchange.?
|
Re: Nick's first unit run
Your flow much higher than mine...probably why I get filter alarm.
Everything downstairs now..where more vacuum pumps are available.
Geo
|
Re: Nick's first unit run
|
Re: Nick's first unit run
And now,? 5.5 his of run time.? I did hit save spectrum before opening the filter lever.?
On Sat, Jun 25, 2022, 6:50 PM Nick Andrews via <nickjandrews= [email protected]> wrote: Okay this has been running about 90 minutes.? I turned off all the fans last night and the door was closed from about 11pm to 5pm.? Factory filter installed.? Using Dud's setting parameters.? Haven't gotten the second unit wired up yet.?
By the way,? should the hot lead be looped through and around the ferrite ring??
|
Re: Nick's first unit run
This is a new (3yrs old) 20x20 metal building I built here.? I did leave the door open and a fan on because it's so hot in here.?
The tapered part is to ensure you insert the card the right way.? I just made a couple with a piece of Geo's filter material slid inside the folded card stock.? Not sure which side is dosed to go up or down,? but here's the pressure with the new filter in place.? Check out how dirty the filter got.?
I said yes on the filter change and it reset the spectrum and counts.?
On Sat, Jun 25, 2022, 10:15 PM Dude < dfemer@...> wrote:
What is the purpose of the
tapered section?
I hooked the LAN up and
ran the VNC program but it won’t talk to it? The VNC program 1.0.8.2 will
connect and give remote control between my computers but not the CAM. The
factory said to look for a VNCsrv.ini file on the CF card but there wasn’t one
there so the server is missing and I’m hoping to get that when they get back on
Monday but I’m not sure how I’d have to load it. maybe the USB port. We’ll see.
Dud
?
?
Here's what the cards measure.? The sensor head is spring loaded
and will safely accept at least .097" thick filters.? I opened the
sensor and used a depth micrometer in both positions.? Normal resting in
closed position is about 20 thou but can be pushed down by finger.? The
mechanism closed easily on .097" of feeler gauges.?
There's a screw on the back edge of the top,? down through a small
hole,? which is a leveling screw for the filter platen.
Be careful about the filter screen,? as it is barely glued
in.? ?This one popped loose while I was messing with it.?
Oh,? and it's pretty obvious this sensor head has been used.?
There's a little bit of schmootz on the aluminum face.? ?Not sure how
to safely clean it.? Haven't opened up the head unit to wire it or power
up yet.?
?
On Sat, Jun 25, 2022, 6:50 PM Nick Andrews via <nickjandrews=[email protected]> wrote:
Okay this has been running about 90 minutes.? I turned off all the
fans last night and the door was closed from about 11pm to 5pm.? Factory
filter installed.? Using Dud's setting parameters.? Haven't gotten
the second unit wired up yet.?
By the way,? should the hot lead be looped through and around the
ferrite ring??
|
Re: Nick's first unit run
What is the purpose of the
tapered section?
I hooked the LAN up and
ran the VNC program but it won’t talk to it? The VNC program 1.0.8.2 will
connect and give remote control between my computers but not the CAM. The
factory said to look for a VNCsrv.ini file on the CF card but there wasn’t one
there so the server is missing and I’m hoping to get that when they get back on
Monday but I’m not sure how I’d have to load it. maybe the USB port. We’ll see.
Dud
?
?
Here's what the cards measure.? The sensor head is spring loaded
and will safely accept at least .097" thick filters.? I opened the
sensor and used a depth micrometer in both positions.? Normal resting in
closed position is about 20 thou but can be pushed down by finger.? The
mechanism closed easily on .097" of feeler gauges.?
There's a screw on the back edge of the top,? down through a small
hole,? which is a leveling screw for the filter platen.
Be careful about the filter screen,? as it is barely glued
in.? ?This one popped loose while I was messing with it.?
Oh,? and it's pretty obvious this sensor head has been used.?
There's a little bit of schmootz on the aluminum face.? ?Not sure how
to safely clean it.? Haven't opened up the head unit to wire it or power
up yet.?
?
toggle quoted message
Show quoted text
On Sat, Jun 25, 2022, 6:50 PM Nick Andrews via <nickjandrews=[email protected]> wrote:
Okay this has been running about 90 minutes.? I turned off all the
fans last night and the door was closed from about 11pm to 5pm.? Factory
filter installed.? Using Dud's setting parameters.? Haven't gotten
the second unit wired up yet.?
By the way,? should the hot lead be looped through and around the
ferrite ring??
|
Re: Nick's first unit run
You need a faster computer,
more memory and a Solid State drive. Probably get rid of XP as well.
Dud
?
?
Finished back-up but now doing a straight copy of the manuals folder...it
says over 42 thousand items and will take 1 day!
Sent from my LG Phoenix 3, an
AT&T 4G LTE smartphone
toggle quoted message
Show quoted text
------ Original message------
Date: Sat, Jun 25, 2022 6:50 PM
Subject:Alpha and Beta particle nuclear decay
studies. Nick's first unit run
Okay this has been running about 90 minutes.? I turned off all the
fans last night and the door was closed from about 11pm to 5pm.? Factory
filter installed.? Using Dud's setting parameters.? Haven't gotten
the second unit wired up yet.?
By the way,? should the hot lead be looped through and around the
ferrite ring??
|
Re: Nick's first unit run
What ferrite? I just ran
it in .
You have very low radon,
more like outdoors. I generally have 2-3 pCi/l. After running for a short
period it runs up to 4 or 5 the drops down to a fairly constant 2-3. I wonder
if the early peak may be an artifact of the algorithm.
Dud
?
?
Okay this has been running about 90 minutes.? I turned off all the
fans last night and the door was closed from about 11pm to 5pm.? Factory
filter installed.? Using Dud's setting parameters.? Haven't gotten
the second unit wired up yet.?
By the way,? should the hot lead be looped through and around the
ferrite ring??
|
Re: Nick's first unit run
Here's what the cards measure.? The sensor head is spring loaded and will safely accept at least .097" thick filters.? I opened the sensor and used a depth micrometer in both positions.? Normal resting in closed position is about 20 thou but can be pushed down by finger.? The mechanism closed easily on .097" of feeler gauges.?
There's a screw on the back edge of the top,? down through a small hole,? which is a leveling screw for the filter platen.
Be careful about the filter screen,? as it is barely glued in.? ?This one popped loose while I was messing with it.?
Oh,? and it's pretty obvious this sensor head has been used.? There's a little bit of schmootz on the aluminum face.? ?Not sure how to safely clean it.? Haven't opened up the head unit to wire it or power up yet.?
On Sat, Jun 25, 2022, 6:50 PM Nick Andrews via <nickjandrews= [email protected]> wrote: Okay this has been running about 90 minutes.? I turned off all the fans last night and the door was closed from about 11pm to 5pm.? Factory filter installed.? Using Dud's setting parameters.? Haven't gotten the second unit wired up yet.?
By the way,? should the hot lead be looped through and around the ferrite ring??
|
Re: Nick's first unit run
Finished back-up but now doing a straight copy of the manuals folder...it says over 42 thousand items and will take 1 day!
George
Sent from my LG Phoenix 3, an AT&T 4G LTE smartphone
------ Original message------ From: Nick Andrews Date: Sat, Jun 25, 2022 6:50 PM Cc: Subject:Alpha and Beta particle nuclear decay studies. Nick's first unit run
Okay this has been running about 90 minutes.? I turned off all the fans last night and the door was closed from about 11pm to 5pm.? Factory filter installed.? Using Dud's setting parameters.? Haven't gotten the second unit wired up yet.?
By the way,? should the hot lead be looped through and around the ferrite ring??
|
Nick Andrews
