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Hello all, I'm having a really irritating problem and I haven't been able to find a solution anywhere on the web. I'm using Access 2003 and I have a form thats controls are bound to a simple table. I created a "duplicate record" button using the wizard, and then tweaked the code just a...

Engineers, I'm relatively new to the world of industrial networking as a chemical engineer, but I'm working on a project that should challenge me quite a bit. I'm going to be installing a few refrigeration units that I want to network with an OPC server using Modbus protocol. I think I've...

Engineers, I'm relatively new to the world of industrial networking as a chemical engineer, but I'm working on a project that should challenge me quite a bit. I'm going to be installing a few refrigeration units that I want to network with an OPC server using Modbus protocol. I think I've...

Dave, Thanks for the direction. I think my sales guy is relatively new and doesn't know a whole lot about comm protocols. I don't really blame him, I don't either! I was thinking Modbus could be a solution. I've heard that the York control system is pretty proprietary, how would I go...

I am doing a project to install a York YCIV chiller (MRU) for process cooling. This is a stand-alone system with its own local controller, but I'd like to provide more information to my operators. I want to have some way to monitor the process conditions/alarm status of the MRU remotely...

HVAC engineers; I'm a chemical engineer and I'm doing a project that involves installing a York YCIV MRU for process cooling. These things are most common in HVAC, so I figure this is the best place to ask. I want to have some way to monitor the process conditions/alarm status of the MRU...

jghrist, Yeah you are right; don't know where that came from. Other than the typo; is the method correct if I can accurately measure the amperes per phase?

All, Thanks for you responses. The data reported is what I was provided with; I recognize that it doesn't make much sense. Attached is the motor curve for the original 150HP motor. You'll notice it says 150/37.5; that is because this is a two speed motor, but I am only concerned with the...

All, First let me preface this post by stating that I am in no way an electrical engineer. My experience with motors and electricity is limited; so please respond in a way that typical engineer could understand. I have a very oversized motor driving an reactor agitator. The agigitators were...

CJKruger and all, My transmitter is scalable from 150"H2O-1000"H20 or so. What I was getting at with my orignial question is that that at some point the sqrt method for calculating flow falls apart (ceases to correlate accurately). So, I can easily go rescale my transmitter and control...

BigInch, Thanks, exactly what I wanted to know. -SK

All, I have an orifice plate flow meter installed to track N2 usage throughout my plant. The issue is that the meter (the transmitter) goes full scale when a downstream solenoid gets stuck open. Obviously I need to rescale the transmitter. My question is, how do I know what the true...

BigInch, 10-4, Thanks. For the record I would take the chickens.

Latexman, The liquid goes into all three reactors at the same time; this system is diluent delivery system for a run-away reactor emergency. There are flow meters and control valves on each of three 1" lines. Everyone else, You all have provided me good answers, but can you help me out...

I am trying to calculate the total differential head across a pump (to size it), and I am having conceptual issues calculating the frictional losses on the discharge side. I'll ask a much simplified question that should help. Assume I have a 2" pipe carrying a liquid. The 2" pipe then...