My Test Bench Project Log.

jaydee · 03-11-2005, 09:09 PM

I just as well concede that I cannot give up this hobby so I just as well expand on it. What I want to do is put together a decent test bench for water block performance evaluation and comparison. Being I travel as apart of my job and have little free time while I am home the best way to go IMO is to try and setup an automated system so I don't have to babysit the bench and watch and record numbers manually.

The main goal is to set it up so all I have to do is mount the block and set a flow rate. Equipment I am planning on using.

I like the looks of the Adlink NuDam modules. http://www.industrialpc.com/nudam/nudamintro.htm

The modules I would get:
ND-6530 USB to RS-232/RS-422 /RS-485 Converter
This will be the module that makes a USB port the path from the modules to the computer.
---------------------

ND-6018 Channel Thermocouple Input Module
This is the module that will take the temperature measurements and send them to the PC for data logging and analysis.
---------------------

ND-6080 2 Channel Counter/Frequency
I THINK this will work to hook the flow meter to?????
---------------------

Other Parts of test bench:

Swissflow FS800 Flow meter
To take mutliple flow rate tests.
---------------------

Adjustable power supply (No specific model selected yet).
For adjusting the power for the heater cartridge in the die sim.
---------------------

Die simulator.
This will be based of Bill Adams design. I have a prototype slug made and will have to figure out how I want to insulate it. Final version pending insulation method.
--------------------

Needle valve.
For adjustment of flow rate.
--------------------

Analysis software (not sure what yet).
Something to take the data and convert it to something useful.

That is the main stuff. Cost will be anywhere from $1,000-$2,000 I am predicting.

Would this work or does anyone have a better solution?

9mmCensor · 03-11-2005, 10:24 PM

Do you want a CrystalFontz 633 Like pHeastus has? I need to sell mine.

jaydee · 03-11-2005, 10:40 PM

Quote:

Originally Posted by 9mmCensor

Do you want a CrystalFontz 633 Like pHeastus has? I need to sell mine.

What is the accuracy and resolution of the thing? I think he had it setup for data logging?

9mmCensor · 03-11-2005, 11:47 PM

Quote:

Originally Posted by jaydee116

What is the accuracy and resolution of the thing? I think he had it setup for data logging?

I dont honestly know. pH should though. heres his review. http://www.procooling.com/reviews/ht...updated_2_.php

pHaestus · 03-11-2005, 11:57 PM

Jaydee does this mean you're repairing the mill too? I'd still like to get a good die sim made too if that's so

jaydee · 03-12-2005, 11:51 AM

Quote:

Originally Posted by pHaestus

Jaydee does this mean you're repairing the mill too? I'd still like to get a good die sim made too if that's so

The main problem with the mill is the CNC part. There is so much backlash I can't compensate for it with the CNC software and it gets a little sloppy. I am fairly certain I can make a decent die slug if I just do it manually on the mill instead of with the CNC. It will take more time but I think it will come out better than that prototype I made before that was off a little.

Whenever I get back to the mill I will give it another go manually. Might be a while though. Headed to Georgia for a couple weeks and then it looks like right out to another job after that in Cali. Then the daughter will be moved back and I will have her on the weekends I am home.

What I should do is drive up there today and pick the mill up and find a place to use it here....

What do you think of the CF633? Is it possible to get decent results from it? From what I looked up on their site it has an absolute accuracy of .5C, that is ok but most of my own blocks are less than .5C different

. The main problem I see is the size of the thermo probes.

jaydee · 03-12-2005, 11:43 PM

Quote:

Originally Posted by 9mmCensor

Do you want a CrystalFontz 633 Like pHeastus has? I need to sell mine.

What do you want for that unit and what style is it?

9mmCensor · 03-13-2005, 03:36 AM

Quote:

Originally Posted by jaydee116

What do you want for that unit and what style is it?

It is a black drive bay kit with a red LCD with extra dow sensors (8 i think total). I used it for about a week before my videocard died, so its practically brand new.
Cost me 120 bucks plus customs and shipping.
$110 bucks shipped would be nice.

jaydee · 03-13-2005, 10:25 AM

Quote:

Originally Posted by 9mmCensor

It is a black drive bay kit with a red LCD with extra dow sensors (8 i think total). I used it for about a week before my videocard died, so its practically brand new.
Cost me 120 bucks plus customs and shipping.
$110 bucks shipped would be nice.

You got PM.

bigben2k · 03-13-2005, 03:43 PM

For temperatures, I'd still have to recomend that you get a reference thermometer, like I did, from Cole-Parmer (or anyone else you see fit). That way, you can calibrate your own instruments.

The one I got had a range of 19C to 27 C, with 0.1 increments. Accurate to one increment, NIST traceable.

The modules look fine. Calibration is going to be what makes your setup a good one.

You can add amp/volt measurement later, which is nice. I probably have a spare 2.5 volt reference IC, good for part of a calibration (when you get there).

As for a PSU, as you know, I got an HP/Agilent unit (pretty old) off eBay, relatively cheap. There might be some lag (voltage drop) as the unit powers up, but it should be rock steady after a 20 minute warm up (I figure). I have yet to test that one too.

How far off are you now from your new year's resolutions?

jaydee · 03-13-2005, 04:08 PM

New years resolutions are shot to hell.

I am having secoond thoughts about the NuDam modules.

Quote:

Voltage Range: ±15mV, ±50mV, ±100mV, ±500mV, ±1V, ±2.5V
Current Range: 20mA
Isolated Voltage: 5000 Vrms
Sampling Rate: 10 samples/sec
Accuracy: ±0.4% or better
Zero Draft: ±0.3μV/ °C
Span Drift: ±25 ppm/ °C
CMR : 92dB
Open connection detection

That is the specs for the thermocouple module. +-4% is not any much better than the CrystalFontz unit. I would prefer .05% - .1%. Especially if I am going to spend a chunk of change on it.

bigben2k · 03-13-2005, 09:49 PM

...then you will follow my path... come to the darkside...

I'm in eBay 5 days a week, I'll spot a good unit for you. Just send me a good email addy, in case I come across something you'll want.

jaydee · 03-13-2005, 10:20 PM

Quote:

Originally Posted by bigben2k

...then you will follow my path... come to the darkside...

I'm in eBay 5 days a week, I'll spot a good unit for you. Just send me a good email addy, in case I come across something you'll want.

I have been searching e-bay religiously. I bid one of these: http://www.coleparmer.com/catalog/pr...=1&sel=0850216

Dosn't do data logging to PC but it does data log by itself. 4 days left on that bid.
The e-mail addy I use for this forum should be good. jaydee116 at customcooledpc.com if you find something useable.

bigben2k · 03-13-2005, 11:51 PM

It could come in handy.

I'm curently tracking:
http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3880320262
analog output

http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3880327141
analog output

http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3880915616
Relay output only

http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3880919247
Relay output only

http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3880930985
Relay output only

http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3880705370
Relay output only

http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3880988724
Relay output only (8 inputs)

http://cgi.ebay.com/ws/eBayISAPI.dll...tem=7500415699
Relay output only

I'm not planning on purchasing any of them, it's just for someone else's benefit (in this case, you!

)

No good pickings here, unless one of the first two has some other kind of output.

jaydee · 03-14-2005, 12:31 AM

I just got the info on the Flow Meter I just won on e-bay.
http://www.dwyer-inst.com/htdocs/FLO...-VFCIISpec.CFM

it is the one in the middle with end connections. Should help flow a little without having 90's on both ends.
I got the VFC-141 model. 2% accuracy through the whole scale (whatever that means). It is a big meter at 13.5" tall. 1" NPT conections...

Well I am off to Atlanta Georgia on Wendsday. Will be there for a couple weeks. Meter should be here when I get back and I will know if I win that other thermometer or not.

From the WBTA thread is sounds like the equipment in my first post should be ok? If so I need to find some logging software to use for it...

bigben2k · 03-14-2005, 02:23 PM

2%, but with 0.5 gpm graduations. It'll do, it's a start.

Good luck on the other unit.

bigben2k · 03-14-2005, 02:39 PM

Today's eBay pickings are much better:

http://cgi.ebay.com/ws/eBayISAPI.dll...tem=7500805342
RTD only, mA output.

http://cgi.ebay.com/ws/eBayISAPI.dll...tem=7500628037
RS-485

http://cgi.ebay.com/ws/eBayISAPI.dll...tem=7500628050
RS-485

http://cgi.ebay.com/ws/eBayISAPI.dll...tem=7500562667
TC or RTD, mA output.
(check the model# though).

jaydee · 03-14-2005, 08:16 PM

Quote:

Originally Posted by bigben2k

2%, but with 0.5 gpm graduations. It'll do, it's a start.

Good luck on the other unit.

I am actually going to be building 2 test benches. 1 on a computer and 1 with the die sim. I will use the lesser parts on the computer bench.

Looks like I am going to pick up that CrystalFonts 633 from 9mm. With that and the flow meter I picked up I can start some decent testing. With some luck they should both be here when I get back from Georgia.

If I win this http://cgi.ebay.com/ws/eBayISAPI.dll...e=STRK:MEBI:IT auction I will have another toy to play with.

Those auction look very interesting. I like the sound of the controler. What kind of pressure deal can hook up to it? Also I assume there is some kind of flow meter than can adjust flow rate automatically?

jaydee · 03-14-2005, 08:23 PM

As for the SwissFlow flow meter i am disapointed to not find any place to buy one easily. I might opt for this one http://store.yahoo.com/pulseinstrume...ewimoinbo.html. I belive they have a version with just an anolog output instead of that LCD display. I asked them for specs and they actually REPLIED!
-------------------------------------------
Pressure 300psig/20Bar
Full Scale Accuracy +/- 1%
I hope that helps.
www.pulseinstrument.com

ToasterIQ2000 · 03-14-2005, 11:12 PM

I haven't used thermocouples.

I guess I'm tolerably familiar with the Crystalfontz 633 and the Dallas Semiconductor / Maxim IC ds18b20 thermometers. ( BB2K is definitely correct in suggesting that you calibrate them. http://dbserv.maxim-ic.com/appnotes....te_number/1117 # App Note 208: Curve Fitting the Error of a Bandgap-Based Digital Temperature Sensor - DS18B20 The math in that is not something that I'm particularly versed in. My gerneral sense is that the ds18b20's varry... As I write: three taking temp into radiator are within .15 deg. C of each other, three on the rad out within a .12 deg. C range -- and one of 8 air temps always seems to read a whopping 3 C high no matter how I arrange them. The last time I orderd from maxim they were $2.28 apiece, so culling out a few deviants from a bundle is quite affordable. ( I have ~10 on the shelf ) Last time I tried to focus on calibrating a set, I was overwhelemed by how much more effect the mounting of the sensors had than the error in the sensors. In my case: how well was each sensor measuring the water versus measuring the that which held it in the water. I'm actually feeling thick-headed on the topic at the moment and am wondering what's on sci-fi ...

A flowmeter with a 4-20 milliamp pulsed output in a range compatible with fan rpm outputs I've found to be convenient for automatic data logging. http://www.omega.com/ppt/pptsc.asp?r...000&Nav=gref02 is what I'm using. Mine is a tad askew -- I ran watter wetter through it and I think something in that kept causing a low grade nylon bushing to swell and sieze. I haven't had one in my hands or talked to anyone who has used one but I've been window shopping for a doppler or vortex-shedding or magnetic induction flowmeter. The zero moving parts appeals to me. I can imagine ( quite hypothetically for me as a hobbyist here ) swapping in the 5th waterblock into a test bench for the day, wondering if the flow seems low as reported by a turbine or paddlewheel meter, finding some sliver of hose trimmings or whisp of teflon tape stuck to the turbine, and asking myself "now how much data should I throw out?"
things on my window shopping list:

http://www.flocat.com/products/index...eries&sid=161&
http://www.clarksol.com/html/prodspecsDM_01D.htm
http://www.thorntoninc.com/products_pfa.htm

jaydee · 03-14-2005, 11:26 PM

Thanks ToasterIQ2000. I been up and down Omega's site and did not come across that meter. The accuracy is 3% which is probably the worst part. Only $86 is good though. Those other meters you linked are nice.

Calibration is certainly a part of the setup and maintenance program.

bigben2k · 03-15-2005, 03:16 PM

Quote:

Originally Posted by jaydee116

As for the SwissFlow flow meter i am disapointed to not find any place to buy one easily...

Sorry, I meant to tip you there; email the people at the Swissflow website:
http://www.swissflow.com/

(Thank you WebLinks!)

bigben2k · 03-15-2005, 03:24 PM

Yeah, mine's mechanical too. I'll be adding a filter to make sure I don't gum up that flowmeter!

I'll be using a simple copper mesh screen for my PC, and I'll probably do the same with my testbench.

Linky!
http://www.twpinc.com/twp/jsp/produc...pe=3&page=data

These are 2" by 2", but you can fold/bend them into a cone, trim the edge, JBWeld a flange to it, and slip it inside of a 1/2" NPT fitting.

Follow the manufacturer specs to size the filter mesh.

(Thank you Weblinks!)

jaydee · 03-15-2005, 06:12 PM

I already did e-mail them. No response for days now.

ToasterIQ2000 · 03-17-2005, 09:21 PM

I'm not well rounded enough or experienced enough on this to say something decisive or final on this, but I since I mentioned that Omega flowmeter I would like to say that I've blown two fan headers using it. I'm not sure ecctly why, but I have not blown anything since I wired it up to power the flowmeter directly from the PSU via a spare floppy connector, and sending only one signal wire to the pulse / 'RPM ' / flow monitoring fan header.

It is possible it is soley do to some mistake in my wiring harness: something grounded out...

My other 'best guess' is that it only blows resistors near the fan header when the flowmeter is powered but not revolving for a long time. I've only blown the fan headers on my Crystalfontz 633, which does fan speed / voltage adjustments and such. ( I run experiments off something like the 633 so I do not trash motherboard components as often. ) The omega requires a pull-up resistor. Do all computer RPM sensing fan headers have pull-up resistance built in. ( I have done no research and a simple answer here would be neat, btw.) Does the 633 use pulse width management (PWM), I can't recall either at the moment. Anyway, I have this idea that when the flowmeter is stopped it may create some feedback with a fan header ... and pop: one more fan header on the 633 stuck at < 5v forever...

I haven't blown anything since I rewired it as above: unmanaged power from the PSU and signal only to RPM monitor.

03-11-2005, 09:09 PM	#1
jaydee Put up or Shut Up Join Date: Dec 2001 Location: Spokane WA Posts: 6,506	My Test Bench Project Log. I just as well concede that I cannot give up this hobby so I just as well expand on it. What I want to do is put together a decent test bench for water block performance evaluation and comparison. Being I travel as apart of my job and have little free time while I am home the best way to go IMO is to try and setup an automated system so I don't have to babysit the bench and watch and record numbers manually. The main goal is to set it up so all I have to do is mount the block and set a flow rate. Equipment I am planning on using. I like the looks of the Adlink NuDam modules. http://www.industrialpc.com/nudam/nudamintro.htm The modules I would get: ND-6530 USB to RS-232/RS-422 /RS-485 Converter This will be the module that makes a USB port the path from the modules to the computer. --------------------- ND-6018 Channel Thermocouple Input Module This is the module that will take the temperature measurements and send them to the PC for data logging and analysis. --------------------- ND-6080 2 Channel Counter/Frequency I THINK this will work to hook the flow meter to????? --------------------- Other Parts of test bench: Swissflow FS800 Flow meter To take mutliple flow rate tests. --------------------- Adjustable power supply (No specific model selected yet). For adjusting the power for the heater cartridge in the die sim. --------------------- Die simulator. This will be based of Bill Adams design. I have a prototype slug made and will have to figure out how I want to insulate it. Final version pending insulation method. -------------------- Needle valve. For adjustment of flow rate. -------------------- Analysis software (not sure what yet). Something to take the data and convert it to something useful. That is the main stuff. Cost will be anywhere from $1,000-$2,000 I am predicting. Would this work or does anyone have a better solution?

03-13-2005, 03:43 PM	#10
bigben2k Responsible for 2% of all the posts here. Join Date: May 2002 Location: Texas, U.S.A. Posts: 8,302	For temperatures, I'd still have to recomend that you get a reference thermometer, like I did, from Cole-Parmer (or anyone else you see fit). That way, you can calibrate your own instruments. The one I got had a range of 19C to 27 C, with 0.1 increments. Accurate to one increment, NIST traceable. The modules look fine. Calibration is going to be what makes your setup a good one. You can add amp/volt measurement later, which is nice. I probably have a spare 2.5 volt reference IC, good for part of a calibration (when you get there). As for a PSU, as you know, I got an HP/Agilent unit (pretty old) off eBay, relatively cheap. There might be some lag (voltage drop) as the unit powers up, but it should be rock steady after a 20 minute warm up (I figure). I have yet to test that one too. How far off are you now from your new year's resolutions? __________________ WBTA (Water Block Testing Alliance) Nordic Hardware WC 101

03-13-2005, 09:49 PM	#12
bigben2k Responsible for 2% of all the posts here. Join Date: May 2002 Location: Texas, U.S.A. Posts: 8,302	...then you will follow my path... come to the darkside... I'm in eBay 5 days a week, I'll spot a good unit for you. Just send me a good email addy, in case I come across something you'll want. __________________ WBTA (Water Block Testing Alliance) Nordic Hardware WC 101

03-13-2005, 11:51 PM	#14
bigben2k Responsible for 2% of all the posts here. Join Date: May 2002 Location: Texas, U.S.A. Posts: 8,302	It could come in handy. I'm curently tracking: http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3880320262 analog output http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3880327141 analog output http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3880915616 Relay output only http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3880919247 Relay output only http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3880930985 Relay output only http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3880705370 Relay output only http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3880988724 Relay output only (8 inputs) http://cgi.ebay.com/ws/eBayISAPI.dll...tem=7500415699 Relay output only I'm not planning on purchasing any of them, it's just for someone else's benefit (in this case, you! ) No good pickings here, unless one of the first two has some other kind of output. __________________ WBTA (Water Block Testing Alliance) Nordic Hardware WC 101

03-14-2005, 02:23 PM	#16
bigben2k Responsible for 2% of all the posts here. Join Date: May 2002 Location: Texas, U.S.A. Posts: 8,302	2%, but with 0.5 gpm graduations. It'll do, it's a start. Good luck on the other unit. __________________ WBTA (Water Block Testing Alliance) Nordic Hardware WC 101

03-11-2005, 10:24 PM	#2
9mmCensor Cooling Savant Join Date: Apr 2004 Location: Canada Posts: 219	Do you want a CrystalFontz 633 Like pHeastus has? I need to sell mine.

03-11-2005, 11:57 PM	#5
pHaestus Big Player Making Big Money Join Date: Aug 2001 Location: irc.lostgeek.com #procooling.com Posts: 4,782	Jaydee does this mean you're repairing the mill too? I'd still like to get a good die sim made too if that's so

03-14-2005, 12:31 AM	#15
jaydee Put up or Shut Up Join Date: Dec 2001 Location: Spokane WA Posts: 6,506	I just got the info on the Flow Meter I just won on e-bay. http://www.dwyer-inst.com/htdocs/FLO...-VFCIISpec.CFM it is the one in the middle with end connections. Should help flow a little without having 90's on both ends. I got the VFC-141 model. 2% accuracy through the whole scale (whatever that means). It is a big meter at 13.5" tall. 1" NPT conections... Well I am off to Atlanta Georgia on Wendsday. Will be there for a couple weeks. Meter should be here when I get back and I will know if I win that other thermometer or not. From the WBTA thread is sounds like the equipment in my first post should be ok? If so I need to find some logging software to use for it...

03-14-2005, 02:39 PM	#17
bigben2k Responsible for 2% of all the posts here. Join Date: May 2002 Location: Texas, U.S.A. Posts: 8,302	Today's eBay pickings are much better: http://cgi.ebay.com/ws/eBayISAPI.dll...tem=7500805342 RTD only, mA output. http://cgi.ebay.com/ws/eBayISAPI.dll...tem=7500628037 RS-485 http://cgi.ebay.com/ws/eBayISAPI.dll...tem=7500628050 RS-485 http://cgi.ebay.com/ws/eBayISAPI.dll...tem=7500562667 TC or RTD, mA output. (check the model# though). __________________ WBTA (Water Block Testing Alliance) Nordic Hardware WC 101

03-14-2005, 08:23 PM	#19
jaydee Put up or Shut Up Join Date: Dec 2001 Location: Spokane WA Posts: 6,506	As for the SwissFlow flow meter i am disapointed to not find any place to buy one easily. I might opt for this one http://store.yahoo.com/pulseinstrume...ewimoinbo.html. I belive they have a version with just an anolog output instead of that LCD display. I asked them for specs and they actually REPLIED! ------------------------------------------- Pressure 300psig/20Bar Full Scale Accuracy +/- 1% I hope that helps. www.pulseinstrument.com

03-14-2005, 11:12 PM	#20
ToasterIQ2000 Cooling Neophyte Join Date: Oct 2004 Location: Gorky Island, WA USA Posts: 22	I haven't used thermocouples. I guess I'm tolerably familiar with the Crystalfontz 633 and the Dallas Semiconductor / Maxim IC ds18b20 thermometers. ( BB2K is definitely correct in suggesting that you calibrate them. http://dbserv.maxim-ic.com/appnotes....te_number/1117 # App Note 208: Curve Fitting the Error of a Bandgap-Based Digital Temperature Sensor - DS18B20 The math in that is not something that I'm particularly versed in. My gerneral sense is that the ds18b20's varry... As I write: three taking temp into radiator are within .15 deg. C of each other, three on the rad out within a .12 deg. C range -- and one of 8 air temps always seems to read a whopping 3 C high no matter how I arrange them. The last time I orderd from maxim they were $2.28 apiece, so culling out a few deviants from a bundle is quite affordable. ( I have ~10 on the shelf ) Last time I tried to focus on calibrating a set, I was overwhelemed by how much more effect the mounting of the sensors had than the error in the sensors. In my case: how well was each sensor measuring the water versus measuring the that which held it in the water. I'm actually feeling thick-headed on the topic at the moment and am wondering what's on sci-fi ... A flowmeter with a 4-20 milliamp pulsed output in a range compatible with fan rpm outputs I've found to be convenient for automatic data logging. http://www.omega.com/ppt/pptsc.asp?r...000&Nav=gref02 is what I'm using. Mine is a tad askew -- I ran watter wetter through it and I think something in that kept causing a low grade nylon bushing to swell and sieze. I haven't had one in my hands or talked to anyone who has used one but I've been window shopping for a doppler or vortex-shedding or magnetic induction flowmeter. The zero moving parts appeals to me. I can imagine ( quite hypothetically for me as a hobbyist here ) swapping in the 5th waterblock into a test bench for the day, wondering if the flow seems low as reported by a turbine or paddlewheel meter, finding some sliver of hose trimmings or whisp of teflon tape stuck to the turbine, and asking myself "now how much data should I throw out?" things on my window shopping list: http://www.flocat.com/products/index...eries&sid=161& http://www.clarksol.com/html/prodspecsDM_01D.htm http://www.thorntoninc.com/products_pfa.htm

03-14-2005, 11:26 PM	#21
jaydee Put up or Shut Up Join Date: Dec 2001 Location: Spokane WA Posts: 6,506	Thanks ToasterIQ2000. I been up and down Omega's site and did not come across that meter. The accuracy is 3% which is probably the worst part. Only $86 is good though. Those other meters you linked are nice. Calibration is certainly a part of the setup and maintenance program.

03-15-2005, 03:24 PM	#23
bigben2k Responsible for 2% of all the posts here. Join Date: May 2002 Location: Texas, U.S.A. Posts: 8,302	Yeah, mine's mechanical too. I'll be adding a filter to make sure I don't gum up that flowmeter! I'll be using a simple copper mesh screen for my PC, and I'll probably do the same with my testbench. Linky! http://www.twpinc.com/twp/jsp/produc...pe=3&page=data These are 2" by 2", but you can fold/bend them into a cone, trim the edge, JBWeld a flange to it, and slip it inside of a 1/2" NPT fitting. Follow the manufacturer specs to size the filter mesh. (Thank you Weblinks!) __________________ WBTA (Water Block Testing Alliance) Nordic Hardware WC 101

03-15-2005, 06:12 PM	#24
jaydee Put up or Shut Up Join Date: Dec 2001 Location: Spokane WA Posts: 6,506	I already did e-mail them. No response for days now.

03-17-2005, 09:21 PM	#25
ToasterIQ2000 Cooling Neophyte Join Date: Oct 2004 Location: Gorky Island, WA USA Posts: 22	I'm not well rounded enough or experienced enough on this to say something decisive or final on this, but I since I mentioned that Omega flowmeter I would like to say that I've blown two fan headers using it. I'm not sure ecctly why, but I have not blown anything since I wired it up to power the flowmeter directly from the PSU via a spare floppy connector, and sending only one signal wire to the pulse / 'RPM ' / flow monitoring fan header. It is possible it is soley do to some mistake in my wiring harness: something grounded out... My other 'best guess' is that it only blows resistors near the fan header when the flowmeter is powered but not revolving for a long time. I've only blown the fan headers on my Crystalfontz 633, which does fan speed / voltage adjustments and such. ( I run experiments off something like the 633 so I do not trash motherboard components as often. ) The omega requires a pull-up resistor. Do all computer RPM sensing fan headers have pull-up resistance built in. ( I have done no research and a simple answer here would be neat, btw.) Does the 633 use pulse width management (PWM), I can't recall either at the moment. Anyway, I have this idea that when the flowmeter is stopped it may create some feedback with a fan header ... and pop: one more fan header on the 633 stuck at < 5v forever... I haven't blown anything since I rewired it as above: unmanaged power from the PSU and signal only to RPM monitor. Last edited by ToasterIQ2000; 03-17-2005 at 09:27 PM.

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