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Hi there, Yes you are correct that the needle valve acts like the equilising valve similar to when you use a 3 or 5 way manifold. About the moving vessel setup, What you will find is that the level readings is never stable since the ship list and tilt and move all the time and therefore the...

Hi there, To determine where you need to do IS protection, you first need to look at the Zone classification of your plant. Where is Zone 0 areas in the plant. Only IS protection may be done in Zone 0 . IS protection may also be done in Zone 1 and 2 but Explosion proof (Ex d) and Increased...

Thanks roydm, Just a few other pointers on level application that all instrument technicians and engineers should know, What I have found in the past is that everyone knows how to setup a level with a dryleg and in a open tank and then try to use that knowlage and apply it to all level setups...

Hi again, Please read these sections again of my writeup since it seems you are still not sure why we need the flushing rings. Don't stress about it, just keep on asking questions until you get there, I don't mind. Remember I also had to learn these procedures from someone else. Once you get...

Hi again, It seems you have a very small level you need to measure very high up on a vessel. Transmitter ATM value will be the distance from the transmitter to the top tapping point minus the distance from the transmitter to the bottom tapping point, so the max capability of the transmitter...

Hi there, Try a post on Control.com, there is a lot of electrical and software "fundies" there.

Hi there, You should really just look at the process line to decide how many pipe diameters will be acceptable. Six on both sides is playing it completely safe but look for yourself and estimate what the flow would look like inside the pipe. For instance directly after a bend in the line or...

Hi there, The choice of transmitter size for a application is actually quite simple. For a piped and capability installation measure the distance between the installed transmitter in the field (or the position you plan to install the transmitter) and the top tapping point on the vessel. Say...

Hi again, Sorry made a mistake with the URV calculation URV = the atmospheric value + (2850 x sg of the product) = -3200 + 2650,5 = -549,5mmH2O = 20ma It should be the distance from the bottom tapping point to 150mm below the top tapping point and not the span value so it must be 3200...

Hi there, Seems like you have a lot of concerns about these capillary transmitters and with good reason since unless you know what you are doing they can be very difficult to set up properly. Especially if the installation was done by someone that does not understand anything about capillary...

Hi there, The SAAB radars are temp and pressure compensated that is why it will not give a exact same reading as your DP tx. If you are on a FPSO list and angle of the ship are taking into account as well in the compensation so you will not get the same reading with the DP transmitter. To...