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  #81  
Old 10-23-2010, 04:25 PM
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we should do this more often
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  #82  
Old 10-23-2010, 04:45 PM
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Next up, using our storage oscilloscopes to investigate Stagnant Pressure.......
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  #83  
Old 10-23-2010, 06:49 PM
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i love the badgers, answer the friggin question!

sorry, it's all that time i've been spending with kiril
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  #84  
Old 10-23-2010, 06:54 PM
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i have 2 watts spike or maximum reading gauges, the only thing that i don't like is that they're dry and tend to bounce a little i don't think a liquid filled would as much.
That is the one I have but a liquid gauge would minimize the jump I'm guessing. An air gauge does not impede the hammer reading in any way. I had a plumber friend tell me they have digital gauges that measure the high at closing but i've never seen it work.
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  #85  
Old 10-23-2010, 06:58 PM
Kiril Kiril is offline
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You can't measure instantaneous forces with measuring devices that have moving parts, since those moving parts will be subject to inertial forces. The reading would lag the actual event, if it was even accurate in the first place. It will probably take a piezoresistive, or piezoelectric, sensor to get the job done.
Moving parts can be compensated for, however even with data adjustments, still not the best tool. If you are going to measure the pressure properly for something like this you are going to need a data logger which will require something other than a dial gauge.
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  #86  
Old 10-23-2010, 07:14 PM
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A liquid filled gauge measuring a hammer...........I don't know. I agree the air gauge can overstate by momentum pushing the red arm over further but some tension is meant to be there as well to minimize that. Keep the pipes full or as much as possible near the valve and the design at 5fps and its no issue.

It occurred to me that since I try to get whatever air settles into the laterals to be at the end heads which are usually 1/2" pipe in my systems that it doesn't take as much water to flush the air and refill the lines either.
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  #87  
Old 10-23-2010, 07:19 PM
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Next up, using our storage oscilloscopes to investigate Stagnant Pressure.......
then can we look at sine waves and the parallel of water and electricity, and such
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  #88  
Old 10-23-2010, 07:24 PM
Kiril Kiril is offline
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Thinking this might be more appropriate?

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  #89  
Old 10-23-2010, 07:31 PM
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Say, do you guys realize it's the five year anniversary of the stagnant pressure thread?
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  #90  
Old 10-23-2010, 07:42 PM
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How 'bout "Polymer Charge and Molecular Weight Effects on Treated Irrigation Furrow Processes"?
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