janner_10
Lifetime Supporting Member
It's hard to program around a ***** design, get an analogue sensor or put up with hunting of sorts.
**** = S h ! T btw
**** = S h ! T btw
Last edited:
it's hard to program around a ***** design, get an analogue sensor or put up with hunting of sorts.
**** = s h ! T btw
Close, but the right thing to do is to take the average of the two speeds at the transitions
The right thing is install the correct field devices.
Not that this site, or the internet in general, usually worries about an excess of hubris.
The best FINANCIAL solution may be to devise a control strategy to compensate for the current design.
And how many times do people cheap out and then spend more time or waste more resources in the end, when they could do it "right" the first time? From my chair, it happens way more than it should.
Ha ha, you waste time how you want; I'll waste time how I want.I give drbitboy a F
So @PeterN's all-caps CLAIM is that no one picked up that that was issue, huh? Really? Then what is this:...NO ONE ASKED ABOUT THE HIGHEST RATE OF CHANGE IN THE OUTFLOW! That determines how fast the pump speed must change if the rate of change is high the level will "ping-pong" up and down at much shorter intervals with the outflow rate is not changing.
?... It will take some tuning to set the [delta flow per second] to control the excursions, but that is expected.
Close, but the right thing to do is [blah blah blah]
It should be obvious that the slower the rate of change in the pump speed the longer it will take to "ping-pong" between the two level switches.
@drbitboy, tuning?
What do you tune? The pump speed must be able to change as fast as the flow does.