Great video Jim, just what I was wanting and waiting to see !! Going back out into the field and having to purchase a lot of equipment I no longer have available, having to find the best tool for the least amount of money that still does the job. Thanks and take care, Brett
Michael, You could then use a vane to proportional balance the system by velocity if the registers are sized correctly, or a capture hood if you desire to get an exact amount of air to each particular space. I typically can get by with a vane.
Hey Jim i am very interested in this product. I recently purchased the testo 550 from your wedsite. I am in Louisiana and here we don't have return duct like in this video. 95% of our indoor systems are in a attic with mostly flex duct. The rest of the systems are in a closet with no duct just a open return whole under the closet. So my qustion is how could i utilize this tool in these applications?
Where was this meter when I started? lol I would like one of them multiplier charts because it is a pain to try and figure out where to drill the holes. I think a lot of guys are going to be happy to see this video. Thanks for making this video Jim!!
This was a very informative video! A lot of the same info applied to my TSI VelociCalc hot wire anemometer. Thanks for uploading, you answered all my questions.
Hey pttanz, In Dec-12 a customer pointed out that the second multiplier for a 5 point/line traverse should read 0.288 not 0.238. We fixed our chart, and sent new ones to all that had download one. We traced the error back to our source and the source was made aware of it. We'll need to make a note on the video. Thanks for the Eagle-Eyes! - Bill Spohn
In California the CEC wants use to use a capture hood on our residential systems to measure fan/air flow.. My question is could we use a vane anemometer or hot wire to do the same thing..
Narrower duct and improved method. The 5 point method for ducts under 30" could be used for both, A vane provides a much larger area of measure than a hot-wire micro glass bead. With the smaller duct and a vane, I found that three holes and a timed traverse was adequate. The more points you traverse however the more accurate your average velocity will be. There is a point though of diminishing return. Even when using a vane, once the duct gets over about 12" it would be good to use the 5 point.
Hey Jim, after you take you traverse at the return, do you adjust fan speed with your manometer than use a balancing hood at each supply, then adjust accordingly. does this sound right
You can do a three or five point traverse. Depends on the duct width and the desired accuracy. Also the turbulence in the duct. The more measurements the better. A vane however can and will give you more accurate results with fewer measurements because it averages eddies currents better.
Hey Jim nice video, but just a quick question. I'm trying to create a quick chart for myself. But I notice that one of the multipliers on your chart said .238. I don't know if your instructions says the same as mine, but my multiplier says .288H. Was it changed?
Hey Jim you use the five point method for traversing the duct using the fieldpiece, but a three point using the testo products. Can you please explain?
Generally speaking, before a humidifier. It's best to measure in an area of smooth (Laminar) air flow. Measuring after any turn, transition, or "device" in the air stream (humidifier, filter, coil etc.) will usually cause chaotic (turbulent) airflow, making measurement with a hot wire or pitot-static tube somewhat more difficult.
In Texas most all units have 4 foot plenum boxes and all the taps in that length. How do you accurately measure in these conditions? Awesome video though.
Plenum boxes are a challenging location to measure in-duct airflow. We usually see people using the manufacturer static pressure tables (and a manometer and static pressure tips) or measuring at supplies and returns and adding them up separately (and comparing) to get total system airflow. To measure at supplies and returns you can use a large vane anemometer or a capture hood. FYI capture hoods can now be had for as low as $400 for CFM range of under 1200
@@TruTechTools Thanks for reply and so quickly at that. What about taking the filter out and drilling holes at intervals and measuring there? Theoretically, it should be same as supply, right?
Sure, it is a different technology than the mini vane. The mini vane has the upside of measuring over a larger area than the tiny hot wire "pin point", plus the mini vane does not need density correction for a "perfect" reading.
hilmi dwiputranto The temperature on the screen of the STA-2 is the temperature of the air flowing around the probe tip as sensed by the thermistor that is in the oval cut out beneath the hot wire bead in the circular cut out.
I you case, a large vane anemometer would be a much better application, They are still reasonable in cost, but make a much better airflow measurement at a return air grill.
I know this is old but figured i mention for anyone considering getting this, seems to be ok for smaller airflows like residential and small commercial systems but i havnt had much luck with mine on anything over about 2000 cfm for some reason. I could do a 5 point 6 times and each time would have very drastic varying results like over 1000 cfm off. I try to keep it as strait as possible and timing equal on each hole but just cant trust it.
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Great video Jim, just what I was wanting and waiting to see !! Going back out into the field and having to purchase a lot of equipment I no longer have available, having to find the best tool for the least amount of money that still does the job. Thanks and take care, Brett
Jim, Once again a great video. You show once again why going digital kicks analog methods for fast and accurate measurements when done correctly.
Michael,
You could then use a vane to proportional balance the system by velocity if the registers are sized correctly, or a capture hood if you desire to get an exact amount of air to each particular space. I typically can get by with a vane.
Michael, yes adjusting by static after the first measurement is the fastest way to set final airflow. That would make another good video.
Hey Jim i am very interested in this product. I recently purchased the testo 550 from your wedsite. I am in Louisiana and here we don't have return duct like in this video. 95% of our indoor systems are in a attic with mostly flex duct. The rest of the systems are in a closet with no duct just a open return whole under the closet. So my qustion is how could i utilize this tool in these applications?
How did you get 20x18 for the duct dimension? did you measure depth? or just width and height?
Where was this meter when I started? lol
I would like one of them multiplier charts because it is a pain to try and figure out where to drill the holes.
I think a lot of guys are going to be happy to see this video.
Thanks for making this video Jim!!
This was a very informative video! A lot of the same info applied to my TSI VelociCalc hot wire anemometer. Thanks for uploading, you answered all my questions.
Hey pttanz, In Dec-12 a customer pointed out that the second multiplier for a 5 point/line traverse should read 0.288 not 0.238. We fixed our chart, and sent new ones to all that had download one. We traced the error back to our source and the source was made aware of it. We'll need to make a note on the video. Thanks for the Eagle-Eyes! - Bill Spohn
Awesome tool. I'm definitely getting this. Thanks for the informative presentation!!
What a nice drill, where can I find one of those?
Does the probe go upwards facing the flow of air or go towards the blower?
I just purchased one today and would like to get it put to good use
In California the CEC wants use to use a capture hood on our residential systems to measure fan/air flow..
My question is could we use a vane anemometer or hot wire to do the same thing..
I did not take it that way. You were correct in your observations. I like the feedback.
Narrower duct and improved method. The 5 point method for ducts under 30" could be used for both, A vane provides a much larger area of measure than a hot-wire micro glass bead. With the smaller duct and a vane, I found that three holes and a timed traverse was adequate. The more points you traverse however the more accurate your average velocity will be. There is a point though of diminishing return. Even when using a vane, once the duct gets over about 12" it would be good to use the 5 point.
I apologize for criticism, this was a very helpful video for me, too.
Kevin, you are correct in being cautious. Glad I had that Extra deep drip leg below.
Hi, can I measure cfm in the duct by using manometer? Calculate cfm by using static pressure?
Hey Jim, after you take you traverse at the return, do you adjust fan speed with your manometer than use a balancing hood at each supply, then adjust accordingly. does this sound right
You can do a three or five point traverse. Depends on the duct width and the desired accuracy. Also the turbulence in the duct. The more measurements the better. A vane however can and will give you more accurate results with fewer measurements because it averages eddies currents better.
hi.. can the apparatus can measure the diameter of 2 - 2.5 diameter that has a small amount of cfm?? can he do it accurately???
Excellent instruction -- a top notch presentation. Thanks Jim!
Hey Jim nice video, but just a quick question. I'm trying to create a quick chart for myself. But I notice that one of the multipliers on your chart said .238. I don't know if your instructions says the same as mine, but my multiplier says .288H. Was it changed?
Can you use it to just take a fpm reading?
Hey Jim you use the five point method for traversing the duct using the fieldpiece, but a three point using the testo products. Can you please explain?
In this practice could we measure temperature and relative humidity? With which instrument or equipment of your brand?
I would suggest this www.trutechtools.com/FieldpieceSDP2
I’m waiting to see if y’all come out with a probe for the job link wireless system. Any news on that ?
We have not heard about a JobLink connected airflow measuring device from FieldPiece. More info on JobLink here: www.fieldpiecejoblink.com/
TruTech Tools Okay thanks
Now it looks like we can use testo air flow meters along with fieldpiece probes together on the measure quick app
Does it matter if its before or after the humidifier? Thanks for the video!
Generally speaking, before a humidifier.
It's best to measure in an area of smooth (Laminar) air flow. Measuring after any turn, transition, or "device" in the air stream (humidifier, filter, coil etc.) will usually cause chaotic (turbulent) airflow, making measurement with a hot wire or pitot-static tube somewhat more difficult.
In Texas most all units have 4 foot plenum boxes and all the taps in that length. How do you accurately measure in these conditions? Awesome video though.
Plenum boxes are a challenging location to measure in-duct airflow.
We usually see people using the manufacturer static pressure tables (and a manometer and static pressure tips) or measuring at supplies and returns and adding them up separately (and comparing) to get total system airflow.
To measure at supplies and returns you can use a large vane anemometer or a capture hood.
FYI capture hoods can now be had for as low as $400 for CFM range of under 1200
@@TruTechTools Thanks for reply and so quickly at that. What about taking the filter out and drilling holes at intervals and measuring there? Theoretically, it should be same as supply, right?
very nice tool and well explained. is this another choice for the minivane anemometer?
Sure, it is a different technology than the mini vane. The mini vane has the upside of measuring over a larger area than the tiny hot wire "pin point", plus the mini vane does not need density correction for a "perfect" reading.
Is that loglinear chart at 6:57 available somewhere?
Where can I get one of those multiplier charts?
Why do we check the cfm in the return and not the supply ?
is the temperature on the home screen showing the temperature sensed by thermistor?
hilmi dwiputranto The temperature on the screen of the STA-2 is the temperature of the air flowing around the probe tip as sensed by the thermistor that is in the oval cut out beneath the hot wire bead in the circular cut out.
@@TruTechTools ok thanks for the info
great video. just got mine, can wait to put it to work.
Jim. Thanks for the anemometer video
I you case, a large vane anemometer would be a much better application, They are still reasonable in cost, but make a much better airflow measurement at a return air grill.
I know this is old but figured i mention for anyone considering getting this, seems to be ok for smaller airflows like residential and small commercial systems but i havnt had much luck with mine on anything over about 2000 cfm for some reason. I could do a 5 point 6 times and each time would have very drastic varying results like over 1000 cfm off. I try to keep it as strait as possible and timing equal on each hole but just cant trust it.
can i measure presure with this tool?
can you use a vane anemometrer to balance a system
i am wondering how would measure airflow in square duct
It will also do m3/hr
The 2nd multiple from the top for 18" duct is incorrect. Great video though!
i got this i love it got me out of changing many coils and txv
Thanks for the understanding.
take your magnetic tape to cover your holes while taking each measurement
good video
LUV THE VID
nice video . thank you
Jim, you should of covered the open gas line when you drilled your last hole.
As promised
Yay metric system. CFM is no use.
Hey I