Artic Master RMS-
Artic Master RMS-
(OP)
Has anyone seen or heard about this thing called an Artic master RMS. It used to be called a Talon RMS.
The website www.articmaster.com makes some pretty impressive claims about what it can do. It is a vessel installed in the same place you would put a receiever in an air cooled system. It makes some kind of vortex, which they claim:
*Reduces Head pressure
*Reduces Energy Costs
*A whole bunch of other great things.
While I am skeptical of the claims, I am not going to debunk the thing immediatley, because they have some testimonials and an Plant Engineering award (albeit unverified). My guess is that the claims are true, kind of, but how they explain how it works is wrong. I equate it with a liquid/suction heat exchanger. People think these magically give you more capacity. They do only if you have flash gas in the liquid line ahead of the TEV, which is common.
The only thing close to a technical explanation is a line which talks about how the vortex creates turblent refrigeration flow which helps cool the oil on the surface of the vessel. THis may be true, but how does that save you 20%?
I also have a cost savings spreadsheet from them which is amateur at best.
Thanks,
Clyde
The website www.articmaster.com makes some pretty impressive claims about what it can do. It is a vessel installed in the same place you would put a receiever in an air cooled system. It makes some kind of vortex, which they claim:
*Reduces Head pressure
*Reduces Energy Costs
*A whole bunch of other great things.
While I am skeptical of the claims, I am not going to debunk the thing immediatley, because they have some testimonials and an Plant Engineering award (albeit unverified). My guess is that the claims are true, kind of, but how they explain how it works is wrong. I equate it with a liquid/suction heat exchanger. People think these magically give you more capacity. They do only if you have flash gas in the liquid line ahead of the TEV, which is common.
The only thing close to a technical explanation is a line which talks about how the vortex creates turblent refrigeration flow which helps cool the oil on the surface of the vessel. THis may be true, but how does that save you 20%?
I also have a cost savings spreadsheet from them which is amateur at best.
Thanks,
Clyde





RE: Artic Master RMS-
Some of the client testimonials are like: "I can turn my thermostat back up now!" and "This room used to be too hot, now it's 8° cooler!"
Works fine lasts a long time won't rust won't bust buy now four easy payments of 29.99 doesn't cut it. They tell a little - lowering the laminar boundary layer by using a vortex, but I tend to think that going through a throttling process (TXV) tends to create turbulence also!! I hope to hear from someone with experience or that can add something based on theory.
RE: Artic Master RMS-
RE: Artic Master RMS-
Big deal. If you look at the PH chart taking subcooling the liquid 25 F only gains about 10-12 % (due to change in enthalpy). However, most AC systems are going to have a liquid temp of 100 or so, so unless it is cold outside how does the change in heat transfer coefficient do anything. This is also counter to their claim that the hotter it gets the better it works.
They make another interesting claim about how it reduces the system pressure. I could put a huge chunk of wood in a piece of pipe and VOILA!, the pressure is lower, downstream of the blockage. A true but meaningless statement.
They also say in another section that it lowers suctio pressure as well. No wonder the amp draw was lower.
Again, if this thing actually works, great. But why? They don't even seem to know. That's probably why only a factory authorized guy can install one. I should call them tomorrow and see if they will sell me one as an OEM.
ADIOS
clyde
RE: Artic Master RMS-
R = v * D * rho / (u * gc)
where:
R = Reynold's number
v = velocity, ft/sec
D = ID of tube, ft
rho = density, lbm/ft3
u = absolute viscosity, lbf-sec/ft2
gc = gravitational conversion factor, 32.174 lbm-ft/(lbf-sec2)
For our 10 ton R-22 system:
NRE 40/100 = 68.8 Btu/lbm
Refrigerant flow rate = 200 lbm/min-ton * 10 tons / 68.8 Btu/lb = 29.1 lb/min
A 5/8" OD copper tube will have an ID of about 0.545", or D = 0.0454 ft
rho = 71.1 lbm/ft3 at 100°F saturated liquid
refrigerant velocity thru the tube = 29.1 / (rho * pi * D^2 / 4 * 60) = 4.21 ft/sec
u = 3.878e-6 lbf-sec/ft2 at 100°F saturated liquid
Therefore:
R = 4.21 * 0.0454 * 71.1 / (3.878e-6 * 32.174) = 108,917
To obtain a Reynold's number of 2000, v * D must equal 0.00351 ft2/sec.
Therefore:
0.00351 = 29.1 / (rho * pi * D^2 / 4 * 60) * D
0.00351 = 0.008685 / D
D = 2.47 ft
RE: Artic Master RMS-
Is there no trade off between subcooling and work input?
But I would like to listen the manufacturer's comments via Clyde if he ever discusses with them.
RE: Artic Master RMS-
RE: Artic Master RMS-
I got a number of names dropped during the conversation, of rather large companies that have them installed. Of course, I have not verified them.
A couple of statements regarding installation:
*There must be nothing in between the articmaster and the TEV. THe idea is that this thing creates a vortex not only within itself, but through the whole liquid line. No LLSV, sight glass, drier, etc. These would break up the vortex created by the Articmaster.
*It must be installed above the condenser. Not above the liquid drain, but above the highest coil. THe idea is to start the "gravity flow." I guess that is why they call it a gravity pump. Whatever that is. If this is a split system with the evap coil above the condensing unit I don't see how that makes a difference.
*It imposes no pressure drop. OK.
I was able to summarize and have the mfg confirm:
THe artcicmaster creates a turbulent flow in the liquid line which increased the heat transfer from the liquid to the outside air, which would increase subcooling.
That is assuming, that the Prof is wrong and there is not turbulent flow in the liquid line. I think I agree with the Prof.
However, even if they are right, it does change the liquid from laminar to turbulent flow (and the Prof is wrong) creating more heat transfer and increasing the subcooling I don't think that it can create that much savings.
According to Copeland Application Engineering bulletin (or any p-h) chart for every 10 F change in subcooling you get 5.6% capacity increase @ 130F condensing and a 3.9% increase @ 90F condensing. This is why they say that it works better when it is hotter outside. This is also why they say that they have more savings with a air cooled as opposed to a water cooled system.
So if we take an average AC system operating @ 130 F condensing in 100F ambient, the lowest theoretical temperature of the liquid due to subcooling from the ambient air would be 100F, or 30 F of subcooling. So 3 times 5.6 is 16.8 % increase in capacity. No wonder it was so cold in the house!
This of course would be a theoretical maximum. For natural convection of a 1/2" diameter copper pipe in still air, the limiting heat transfer coefficint would be on the outside of the tube not the inside. Making a change from laminar to turbulent flow not very significant. The best gain would come from running the liquid line through additional coils with incoming ambient air being drawn across by the condenser fan.
Still, there could be real savings in a limited number of situations. If the savings are small, they are still savings. Especially if the thing is not that expensive.
Anyway, here is the info I have received. I would love to hear some input on these new facts.
ProfSporlan: Thanks for you calculations. I believe your numbers are correct.
Clyde
RE: Artic Master RMS-
Invariably, I hear about all of the energy saving devices being promoted to the refrigeration trade. Obviously, some have more merit than others. Manufacturers of refrigeration flow controls generally don't get too excited about these devices one way or the other unless they affect the operation of their products. Most manufacturers of refrigeration systems are more than capable of evaluating these devices, and advising their customers as to their value.
Evaluating claims of energy savings based on thermodynamic principles, however, is a useful exercise for anyone involved with the design and/or servicing of refrigeration systems. If a device claims to save say, 25 percent in energy costs, then the savings must be accounted somewhere. The First Law of thermodynamics requires it. So armed with an understanding of P-H diagrams, psychrometrics, heat transfer, fluid flow, and evaporator/condenser/compressor performance, one should be able to evaluate such claims, at least on a theoretical basis. There is no "black magic" in refrigeration.
Clyde asks a pertinent question: what if this device creates additional subcooling on a particular system? And what additional energy savings does that produce?
ProfSporlan: Thanks for you calculations. I believe your numbers are correct.
I got it right the second time around... :)
RE: Artic Master RMS-
The principle, however, doesn't work with liquid flow.
RE: Artic Master RMS-
What was your final outcome with Artic Master? They recently invited me to SBC in California to see their results and I am impressed.
Please let me know what you discerned.
Best regards
Ed
RE: Artic Master RMS-
I never wound up using it. They don't want to sell it to me and have me install it so it wouldn't not be worth the few percent I MIGHT get out of it.
I am still skeptical of the device mostly because all of their marketing is not very scientific. In addition, most of it is lame. "It was so cold in the house." Temperature is temperature, whether or not you used a articmaster or not. If the house suddenly got to cold after it was installed it means the guy who put it in broke the tstat.
I would like to hear you opinion of the device since you saw it yourself.
Adios.
Clyde
RE: Artic Master RMS-
I've been doing some energy conservation work for a company that has been approached by ArticMaster. The way they make money is by getting you to agree to write them a check. Before the installation, you have to sign on the dotted line guaranteeing that their "energy savings" are correct. Regardless of what the real savings are, you've agreed that they are x-percent and you cut them the check before the can is ever put on the machine.
Looking at their "energy savings" calculations, check out the entering air enthalpies. You'll notice that the retrofit entering air enthalpy is MUCH lower than the original, i.e. there's not as much load on the machine!! Of course the compressor power is reduced in this case.
If you want to make them go away, just ask them for a temperature-entropy diagram that explains the operation of their device. They'll go away for a few months. Continue to ask the engineering questions and they'll eventually give up. Just my 2 cents.
Rhett Graves
RE: Artic Master RMS-
I saw two Carrier split units each has two Articmasters installed, as I was conducting some maintenance I asked to see any log books. What I saw was quite fascinating.
The Amps draw was reduced by 8.5%to 11% and the delta Temp improved by 7 degree F (average),I asked some of the on site people if they were impressed. "YES",so was I.
I had not seen these before and decided to do some research,thats why I am here to lear if others have witnessed a installation and can explain why this little "blue beauty" works
RE: Artic Master RMS-
For maximum energy savings, we now standardly recommend premium efficiency motors, VFDs, and artic masters.
RE: Artic Master RMS-
I have run into an application that does not show the guaranteed 20% savings. I am very frustrated that I am not getting adequate technical help from the manufacturer. Pretty much, I am getting guesses as to what is wrong, which verifies an earlier post about troubleshooting problems.
I would be more than willing to talk with anyone that wants to try and figure out the "nuts and bolts" of this device. I also would add, that unless you have been properly trained in the installation - DO NOT DO IT! This is why they will not just hand one off to you and trust that it will be done right. It totally changes the way that you charge and evaluate a system. This in and of itself is a difficulty. ie. Do away with your subcooling and superheat measurements, they no longer reflect the charge in the system.
I would also be open to sending a pdf copy of the installation manual that comes with the ArticMaster unit for evaluation if anyone is interested.
-J. Thiede
ArticMaster Rep
RE: Artic Master RMS-
thanks.
RE: Artic Master RMS-
I also have lab tests, before-after field readings, etc that I would be happy to share and discuss. I am looking forward to answering some of your questions if I am able.
With the knowledge that I have at this point, the ArticMaster does several things:
1-By creating a vortex, it pulls the cooler refrigerant to the center, thereby forcing the warmer refrigerant to the outside of the vessel to continue to loose heat to the vessel.
2-This vortex allows a colder coil temperature, even sometimes below 32 deg F by allowing some flash gas through the center of the vortex and thereby "defrosting" the coil before the system itself can respond. The added vapor reduces the efficiency of the evap coil but is offset by the other benefits of allowing a colder coil. (by about 5-10 deg F on average)
3-The vessel in and of itself, as with any receiver, adds maybe 2-4% increase in system performance just because of the properties of a receiver. Some sub-cooling and increased refrigerant capacity, effectively increasing the condensor capacity by up to 20%.
4-It creates a "mixing" of the refrigerant which allows a more uniform heat transfer and helps (along with added velocity) to sweep deposited oil, that acts as an insulator, off of the refrigerant line walls. This also reduces the load on the compressor as less work is required to move the refrigerant.
You may also be interested in reading the patent which I would also be more than happy to send to you in pdf form.
-J. Thiede
ArticMaster Rep
RE: Artic Master RMS-
I wasn't involved, but sure like the intuitive nature of real kWH measurements.
PS
RE: Artic Master RMS-
RE: Artic Master RMS-
And I thought you ran vapor in a DX coil anyway.
It kind of seems like the myth about liquid/suction heat exchangers. They increase system capacity, only if the prbolems the heat exchangers solves are present beofre the HXR is installed. BTW, I use liquid/suction HXR's in almost all of my equipment.
In a perfectly running system the ArticMaster won't do anything. If the system is all jacked up, maybe it helps out.
Thanks to jthiede for your input on this, even though I disagree.
Clyde
RE: Artic Master RMS-
RE: Artic Master RMS-
Thanks for the offer.
jeffandsheri@cox.net
I am getting one of those things in a couple of weeks.
Can't wait to mess with it.
RE: Artic Master RMS-
Thanks steveolsen@hawaii.rr.com
PacificSteve
RE: Artic Master RMS-
I would think adding a receiver to a low temp system with a marginal condenser would produce savings, while adding a receiver to a medium temp system with an adequate condenser would be wasted effort.
(Note my above diatribe disregards issues that require a system to have a receiver such as condenser fan or flooded head pressure controls)
The problem with analyzing the effectiveness of an energy savings device applied to a refrigeration system is one has to eliminate all the other variables. Reduced KWH readings really don’t tell you anything when you’re adding a receiver to a system where one had not existed, the refrigerant charge is being adjusted, the TEV is being set correctly, condenser coil cleaned, air flows corrected, etc, etc, etc.
Now two brand new units identical in every which way except for the addition of the energy saving device… now there’s a truer comparison.
RE: Artic Master RMS-
Quite an interesting thread on the ArticMaster. In one of your "daitribes" you referred to the Reynolds number, and laminar flow. Coule you give an explanation of these properties and numbers along with desirability/undesireability.
Following your threads along with Clydemule's. Great stuff, thanks for taking the time to educate the rest of us.
RE: Artic Master RMS-
The ArticMaster literature implies that liquid line refrigerant flow for a typical a/c or refrigeration system is laminar. A Reynold’s number calculation applied to recommended refrigerant liquid line sizes shows that this is not the case.
RE: Artic Master RMS-
Thanks for taking the time to reply to my query .
cjw81
RE: Artic Master RMS-
I guess my whole issue with concept of increase heat transfer to the "vortex" induced in the liquid line is not a matter of what flow regime we are in, but the overall heat transfer coefficient.
We can jack up the reynolds # to a bijillion, but when you have a liquid line with 105 liquid (fully vortexed and turbulent) in 90F still air becuase the liqiud line is run inside a wall, through a drop ceiling, then passing through some batten insulation, all the while zip tied or other wise mickey-moused to the suction line fully insualted with 3/4" Aramflex. Because of the zip ties or electrical tape, most of the 3/8" line is embedded in insulation.
In the above scenario, the overall heat transfer is something like 3. Maybe 3.2. Regardless of how turbulent the liquid may be, we still have a lousy heat transfer coefficient outside the tube.
I guess that is why God gave us subcoolers (Gen 1:46-47).
I think you hit it on the head, take two BRAND NEW machines installed with EXAXCT same condions (tough to do in the field) and then make a comparison.
Adios.
RE: Artic Master RMS-
A problem with applying the vortex theory in and of itself is that this occurs before the expansion device. It cannot travel through the expansion device into the evap. coil. As ClydeMule said, what kind of heat transfer are we getting between the ArticMaster and the expansion valve? Virtually none without heat-sinks and moving air.
This has force me personally to look at even further options than the above. What about Pressure-Temperature-and Velocity relationships? What we do pretty much know is that we get a cooler evap. coil temperature and less amp draw on the compressor. This would indicate that we have lower pressures, which we do.
Theory:
A molecule in a vortex has increased velocity. This increased velocity has to result in either a lower pressure and/or a lower temperature. This would mean that the refrigerant enters the expansion valve with a combination of lower temperature and/or lower pressure.
An expansion valve works by lowering pressure even further, which results in lower refrigerant temperatures. If the vortex is causing lower pressures/temperatures to begin with, this could be the reason for lower coil temperatures.
This increased velocity and lower pressures would also change the compression ratio of the system, thereby lowering amperage draw.
I know this is not what the manufacturer suggests, nor does the patent for that matter. Does this make more sense and/or lead to any further clarification?
The problem here is that I know that it works, I've seen it work in real world application and so have others. What is wrong with this picture is that the basis for it working is still unsure.
The result is exactly as stated elswhere (I just don't remember where but I think that it was ClydeMule, please forgive the paraphrasing) that "The ArticMaster may work but the manufacturer doesn't have the fogiest idea why. This means that when it doesn't work right, they won't know how to fix it and they will just blame it on the installation."
You do not know how true this is and how many times I have used this quote in the last couple of months. They will claim that "It works every time that it is installed properly!". Then ask them why I have paid their techs and my, according to them, best installers out there to install on applications that it did not perform as promissed and instead of giving me a definitive answer, they act like a bunch of shade-tree mechanics and are taking the "parts changer" attitude until I end up with a brand new system.
This is my motivation for figuring this thing out, along with the fact that I hate not knowing. If I as a rep see this, then what does my customer think when I don't have an answer. As I inferred, this is only on a couple of installations but this is enough for me to say that I won't sell any more of them until I understand how to "fix it".
Thank you all for your incredible input!!!
-J. Thiede
ArticMaster Rep (on pause)
RE: Artic Master RMS-
I am glad you see that we are not attacking your product, just trying to figure it out. It is hard to find people who don't get defensive when questioning the product.
As an engineer of a packaged product, I am always bombarded with cut sheets on the next whiz bang energy saver. They all have something about ASHRAE 90.1 stamped on them. It gets kind of hard to cut through the BS.
As a salesman of the same equipment, I am on the other side and am trying to justify how great my machine is and how it will save the customer money. I feel that I have been successful mostly because I know my product in and out, and when necessary can delve into the technical nitty gritty. Though sometimes I go overboard and the customer's eyes glaze over.
I have to hold my vendors to the same standards of technical competency that I am held to. Just kind of stubborn that way.
Good luck with Articmaster.
Clyde
RE: Artic Master RMS-
A molecule in a vortex has increased velocity. This increased velocity has to result in either a lower pressure and/or a lower temperature. This would mean that the refrigerant enters the expansion valve with a combination of lower temperature and/or lower pressure.
jpthiede, you might find the subject of the Hilsch vortex tube of interest. A reasonably concise explanation can be found at: http://www.visi.com/~darus/hilsch/
Yes, a vortex can be used to create a refrigerating effect. But I think you need vapor flow and extremely high velocities.
RE: Artic Master RMS-
He was claiming a 20% reduction in power consumption. I watched the animated presentation and after leaving the vortex chamber, the refrigerant was full of bubbles as it exitied through the liquid line.
I concluded 20% power reduction, due to 20% capacity reduction.
The same seminar also pitched magnets that you added to your carbuerator to get inproved gas mileage.
Seemed all snake oil to me.
RE: Artic Master RMS-
I would also like to know who presented a talon to you as the talon was an older product bought out by the current manufacturer. It is now ONLY sold under the name ArticMaster. The talon had problems with manufacturing welds. The patent rights were bought by the current manufacturer and an effort was made to replace talons that had already been installed with new product.
I have also noticed that people like throwing around the term "snake-oil" every time that they don't have the adequate knowledge or information to understand something.
I guess that the thoery that Earth is round not flat would have fallen into the category of "snake-oil" also...
Constructive input would include reading what has already been posted here and giving an educated reason as to why you disagree.
Thanks,
-J. Thiede
ArticMaster Rep (still on pause)
RE: Artic Master RMS-
I understand that TXU routinely offers this technology when trying to reduce power consumptiuon in Texas. Never really checked that out but no reason to challenge.
I love this tread but some of you skeptics need to try it - you might like it.
RE: Artic Master RMS-
The presentation also indicated various power utilities endorsing the product. I tried to research the endorsement on the internet by visiting web sites of the utilities mentioned, but was unsuccesful in verifying the claimed endorsement.
RE: Artic Master RMS-
Examination of a standard Pressure enthaply diagram or a temperature Entropy diagram and a component balance graph, will show where heat energy is being absorbed and released from a refrigeration system.
No known working device has yet to violate the laws of thermodynamics that we engineers hold so dear. I have tested several refrigeration energy saving devices, and have not found a valid claim yet that could not be explained using standard engineering analysis.
1) It has been claimed that this device makes the evaporator temperature lower. In an existing system a lower evaporator temerature can be caused by;
a) reduction in air flow or fouling of the heat transfer surface either internally or externally
b) less refrigerant in the evaporator (metering device underfeeding because of entering bubbles)
c) an increase in compressor pumping capacity
d) any combination of the above
2) It has been claimed that this device reduces the energy required to operate the compressor. For an existing system a reciprocating compressor will require less power if,
a) the saturated discharge pressure is reduced
b) the saturated suction pressure is reduced (specific power increases, but mass flow decreases,and overall power decreases)
c) the suction superheat is reduced
d) improvements in compressor design or efficiency
d) any combination of the above
3) Net refrigeration effect can be increased by aproximately 6% for every 10°F reduction in liquid temperature entering the TX valve. (R-22 air conditioning)
Analysis
Since this device does not increase the efficiency of the evaporator, (otherwise the SST would increase not decrease) we must conclude that it increases the efficiency of the compressor or the condenser. If it increases the pumping capacity of the compressor, it would decrease the evap temp (claimed) but that would increase power as well (not claimed) The only way that the power could be reduced and the pumping capacity increased is to lower the head pressure.
To lower the head pressure the condenser efficiency would have to be increased (Q=UA delta T)
Due to the location of the device in the system, it is possible for this thing to work, if it could reduce the refigerant volume in the condenser, thus increasing the EFFECTIVE condensing area in the tubes, and lowering the head pressure. OR if it could increase the heat transfer of the liquid line and get more subcooling.
Howerever, I doubt that the condenser effective area can be increased by a device located after the condensate header.
AND
Subcooling is EASILY MEASURED with ANY quality temperature meter, and yet they do not claim this is how it works. (as this would be easily verified).
Therefore...
If the liquid entering the metering device is not colder, or the head pressure is not lower.
I have to cry "snake oil".
HOWEVER.... if they need land to set up manufacturing facilities, I have some in Florida that would be perfect. Trust me.
<grin>
Thats the way I see it.
Gerry
RE: Artic Master RMS-
The reason he really achieved 30% savings is that he simultaneously fixed other system problems which were ignored or not understood by the maintenance staff. A very valuable skill indeed, however, the device was generating a small savings, and the human skill was responsible for the lions share of the savings.
Any thoughts on whether this applies here where we have so many true believers and so many convinced it is another snake oil black box.
PacificSteve
RE: Artic Master RMS-
Evap. Temp (In/Out), Cond. Temp (In/Out), Avg RLA, Amb. Temp, Head Pressure, Suct. Pressure, Superheat...in this order before and after.
Sample # 1
71.0 - 77.0, 56.0 - 57.0, 92.0 - 95.0, 112.0 - 125.0, 10.4 - 10.0, 92.0 - 95.0, 290.0 - 265.0, 75.0 - 78.0, 13.0 - 17.0
Sample # 2
68.0 - 69.7, 48.0 - 48.4, 69.0 - 94.3, 80.0 - 106.9, 14.5 - 15.1, 69.0 - 94.3, 165.0 - 200.0, 59.0 - 59.0, 13.0 - 7.0, & condesate was 0 oz / 15 min off of the coil before and 22 oz / 15 min back
I have several others if interested.
-J. Thiede
RE: Artic Master RMS-
Where are you located? I have an alliance with Power Sales who is a licensed office of IMC. IMC, Tennessee, is a distributor and/or provider of Artic Master and other power reduction and asset protection technologies. They do not install. I need a contact to install in NJ. My business is engineeting and capital project consulting. There is strong recent interest in Artic Master.
More examples of results would be appreciated. Historical information, i.e., results after a year or so would also be of inmterest.
I am not promoting or selling but rather trying to understand the actual benefits rather than theoretical benefits.
Joe Barba
973-226-4935
RE: Artic Master RMS-
Sample #1 numbers seem to compare 92°F ambient less the ArticMaster and 95°F ambient with... a better comparison anyway. The resulting increase in evap pressure and reduction in head pressure would improve system efficiency. The superheat increases from 13°F to 17°F with the ArticMaster? A higher load on the evap would explain this as would the higher evap pressure. But if head pressure dropped with the ArticMaster, this would be interesting. Was the unit overcharged a bit originally?
Bottom line is without a test unit monitored in a psych chamber with the ArticMaster installed, and without it installed, it will be difficult to gain insight as to what the ArticMaster brings to the party.
RE: Artic Master RMS-
Before installation of the ArticMaster, the system that it is installed on must be in proper working order. This means that the charge is checked along with the cleanliness of the coils, etc. Now I do understand that if you were not standing there watching how it may look like there was more done that just installing the ArticMaster. I do have a report from Geottl - South Mountain Laboritories that was a controlled installation that I can forward to you in PDF. You can request this through email if you like.
-J. Thiede
jthiede@advenv.com