Hi Folks,
I have searched the Internet high and low for an answer to this question. If it has already been asked please accept my apologies.
I have a flow totalizing system that works like this:
Coriolis flow meters measure the flow feeding into and returning from a closed loop water system. When an operator opens one of the feed points the PLC integrates the difference in feed flow vs return flow. This is then used as the total flow over a given time.( I hope I made this clear).
My questions are:
Have you seen this approach before.
Could you help me explain what would cause a 30 % error in totalized flow. The only variable that has changed is the flow rate of the loop. When I last tested the errors were negligible. They are now huge +25-30%
I can't put up the ladder logic right now because I am not at work. If anyone is interested in helping me I will upload it tomorrow if need be.
Thanks
John
I have searched the Internet high and low for an answer to this question. If it has already been asked please accept my apologies.
I have a flow totalizing system that works like this:
Coriolis flow meters measure the flow feeding into and returning from a closed loop water system. When an operator opens one of the feed points the PLC integrates the difference in feed flow vs return flow. This is then used as the total flow over a given time.( I hope I made this clear).
My questions are:
Have you seen this approach before.
Could you help me explain what would cause a 30 % error in totalized flow. The only variable that has changed is the flow rate of the loop. When I last tested the errors were negligible. They are now huge +25-30%
I can't put up the ladder logic right now because I am not at work. If anyone is interested in helping me I will upload it tomorrow if need be.
Thanks
John