JStephen,
Thank you. I thought the same about the time. However, while I did it years ago it was a huge pain, and I doubt that I could do it again. Solver is way over my head.
Geoff13,
Thank you. I'm happy to say that there are only eight points. This was a small tank.
Here is a sheet from...
My Supervisor is convinced that he saw a spreadsheet for calculating the Cosine curve from the settlement data. I have now spent more than two hours searching online to no avail.
Can anyone provide a link to such a spreadsheet?
thread404-167528
To facilitate responses I will number my thoughts
1.Is it correct that when loads reach a certain level, additional power sources (natural gas turbines, boilers, oil, and coal plants) are brought online?
2.Not all of these additional power sources are located at the same geographically located...
Has the use of a four conductor cable to power and control several devices gone beyond the irrigation market? (Besides the Color LED strip lights.)
If so, where is it being used?
Who are the manufacturers[highlight #FCE94F][/highlight]?
Curtis2004,
Perhaps I missed something in the drawing and your comments on the installation, but it appears that there is more than one valve in the piping. If two valves are closed with oil between them, a pressure relief system of some sort is needed. If a pressure relief system is not...
Thanks BIMR!
That is a good idea. Thanks also for the drawing.
Unfortunately, the outfall for the overflow is outdoors and the float switch will be triggered by rain.
It seems to me that the best way is to install the flow switch in the overflow pipe. Now that I think about it, the switch...
LittleInch and bimr: Control is indeed a given. That is the reason for the project in the first place. I have a transducer, Radio system, Level control, and pump control already.
Since I was asking if there was a common practice for an overfill alarm, I think the answer may well be NO. I know I...
Thank you for the responses. I'm back from two weeks on a secure site. Sorry for the offense of not responding. I've been very distracted by work.
The tank is an AWWA water tower with no external level indicator. While there is power at the tank, the underground communication wires have been...
This tank is adjacent to a steep road. When it overflows, the water makes the road dangerous.
The owner wants an alarm indication when the tower overflows. Currently, there is a pressure gauge operated alarm which is not reliable due to the distance from the tank and the elevation. As the...
I have a well and a ground level storage tank. The existing well pump is failing. I need to select a replacement which is much smaller in order to minimize current draw on the electrical system.
Since there appears to be no useful excel sheet to help with the calculations for an old electrical...
Warning, I know very little about PLCs! THIS IS A LONG POST IN AN ATTEMPT TO FOLLOW THE GUIDELINES
(I suspect there is an answer here somewhere, and I have found some great leads by searching it, but the site is sooooooo big.)
I am looking for a recommendation for a timer or PLC/PLR.
This...
NFPA 30 22.7.4* states "Extension of Emergency Vent Piping. Piping to or from approved emergency vent devices for atmospheric and low-pressure tanks shall be sized to provide emergency vent flows that limit the back pressure to less than the maximum pressure permitted by the design of the tank."...
