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What is a traverse?

Is it safe to permanently mount a flow sensor there ?

7200 / 6400 = 1.125 1.125 X 1.125 = 1.265 1.265 X 2.4 = 3.037” W.C. How did we get two different answers? Can someone explain… 😂

Great advice thank you!

Hi, great video. Please can you post the equation to calculate velocity pressure? And how can I calculate flow with velocity pressure? please.

I got question for you! I am doing pump curves on new pumps most of the time and actual dead head pressure doesn't match with the given performance curve dead head(curve given by manufacturer)! I checked speed, and impeller size and new pump might not have worn seal or impeller. Is it possible to have air trapped in water system and it will give a wrong reading as air has low density!? its happening a lot! I am really confused and looking for solution to how to find if air in water system? or its something else causing problem! Please help me if you can. Thanks!

Very helpful explanation sir...

can you please let me know the name of instrument and its part number you using to measure in this video

This is lab have everything to produce top air balancers👍

1980

how were you measuringing if fan was turned off? Be nice to see inside not outside.

Excellent explanation of different terms.

haha, "that's how simple it is!" It should be fairly obvious to anyone who holds an advanced degree in hyperbolic topography!

Nice video sir

I like the way you explain it. Thank you very much sir.

what instrument in the video and the chart being used? please if u share any video share the full details so that viewers can understand..

Variable orifice valves are becoming a thing of the past and also you should vent 1st before recording your reading

WHERE DO I GET THE WHEEL

I thought fan static pressure is the pressure the fan in producing and total external static pressure is the entire pressure of all duct work.

Nicely done

Can we directly measure velocity if we have a meter in which there is a selection for Wilson Grid

What Duct traverse using latest instruments...

2.4x1.235 (should have been squared) right?

Thanks

sorry about your video I can't see anything

Very informative and effective....

great video I learned a lot I've been doing this for 31 years never had any training in this kind of performance testing which working on Chillers real important

what is the instrument you are using to measure the pressure?

Excellent video series! The most professional and detailed HVAC diagnostics I have seen.

well briefed and illustrated thank you

I wish the balancers would mark or label what they set up so years later, some tech has bumped or changed it, we can put it back. I wish they would maker damper positions too. I also wish I had a lot of money.

can not understand

Stuart if he shows you the basics then he won't have any students in his class same goes for achvactab1 notice the Title on the video Ontario Sheet Metal Workers Training Centre and why is a Sheet Metal Workers Professor teaching a closed loop flow rates circuit balancing class to sheet metal workers? no wander my chilled// Hydronic systems never work properly ( done by Sheet Metal Workers!!//???

This guy shows you how he does it Doesn't really get into the real basics. Can anybody see that wheel

I got an interview tomorrow for tab technician, I don't have any idea what it is but it seems challenging. Is this a high paying JOb?

Pulle diameter and air flow pd2=pd1×(cfm2/cfm1) Rpm and air flow Rpm2=rpm1×(cfm2/cfm1) Static pressure and air flow Sp2=sp1×(cfm2/cfm1)spare Amp draw and air flow Amp2=amp1×(cfm2/cfm1)cudied

And Is that total static pressure?

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hey i got the value of the air enters in to the unit is 605pa and the air leaves out from the fan is 270pa . would u like to calculate my esp

Doing it both ways to see what gets you the best average ? ( You don't know this do you ?? ) Use a methode to proportional balance and most important is understanding that adjusting the OBVD dampers at the grill will screw with your ak factor . Beware and use a flow hood if you can to verify.

Note: Since the typical flex duct to the box is not nice and straight it's likely your reading will be way off. Either traverse or the typical method to determine flow is using an airflow hood.

Important to note you can not average the velocity pressures, you must convert each to velocity and than get the average. Additionally, this is 2014, the magnahelic is outdated around 15-years ago. The digital manometer's are cheap and accurate.

Bob, This is 2014 and it has proved to be so erratic I will call this method useless . Get a flow hood or do a traverse but that method went out long ago.

I suggest noting the system would need to be sequenced to it's full flow capacity which allows a pump to perform and not be restricted by the system itself. Also important is when a suction reading is negative you would add and not subtract from the discharge side. Aloha-Paul Morse-AABC-TBE

Bob, Not sure why you set the meter to bypass and than hook up to ports. Bypass equals the + & - gauge reading, than zero it, Now you ready to connect it and measure DP You also should note the likely motorized modulating valve that MUST be open before you do the above. Aloha-Paul Morse-AABC-TBE

Bob, ur tab procedure is badly flawed. The manometer would be used as a VERY last resort. That means will get you within 20% - 50% accuracy pending main branch run to the inlet. Flowhood is the simplistic way to determine actual Cfm. The fan powered box where you not nothing to do at the filter inlet point is actually the MOST important point to test. Once correct fan cfm is set you need to match that with primary air to assure getting the 55.0 F leaving temp (Typ) This is done by making sure the filter inlet point is not positive or negative but neutral. Unless you want to draw plenum air at full flow or discharge cold primary air out that point which cost money. Aloha Paul Morse-AABC-TBE