Mischief55
Lifetime Supporting Member
Hi Everyone,
The situation: 4-20mA Druck pressure transducer (5 psi, 138.5inches) in a lake. 1/4 mile from Aromat PLC reading in a scale of 0-8000.
Challenge: To read in the lake level to the nearest .1 inch.
Problem: Incoming signal is varying by 50 points. (57 points is 1 inch)
Questions:
Is it even possible to get the desired accuracy with this set up?
I am having trouble getting an extremely accurate milliamp reading as I only have a meter not an oscilloscope. Is this variation of .1 milliamp "normal"?
I am scanning at 3 milliseconds and taking a reading every .1 seconds to average 10 readings. Does this sound like a good averaging rate?
Any other advise on this would be greatly appreciated. I've been arguing with it on and off for 6 months.
Thanks everyone,
Sarah
The situation: 4-20mA Druck pressure transducer (5 psi, 138.5inches) in a lake. 1/4 mile from Aromat PLC reading in a scale of 0-8000.
Challenge: To read in the lake level to the nearest .1 inch.
Problem: Incoming signal is varying by 50 points. (57 points is 1 inch)
Questions:
Is it even possible to get the desired accuracy with this set up?
I am having trouble getting an extremely accurate milliamp reading as I only have a meter not an oscilloscope. Is this variation of .1 milliamp "normal"?
I am scanning at 3 milliseconds and taking a reading every .1 seconds to average 10 readings. Does this sound like a good averaging rate?
Any other advise on this would be greatly appreciated. I've been arguing with it on and off for 6 months.
Thanks everyone,
Sarah