Hello guys, hope u coud help me with my job.
I need to analyze de voltage (pre-amplified) that comes from a balance to an analog input...
I have to create a measurament scale, i am thinking about taking the input voltage from the balance with 0 grams (empty) and with 1 kg on it, then scale it...
Wich is the method to have the best measument precision? Do you have better methods? Does anyone have tried to do something like this...
I hope i was clear to explain the problem, thanks in advance for helping!
Hi, your solution would work, however you are assuming a linear relationship.
You would produce a more accurate conversion by taking readings at 0, 100g, 200g, 300g and so on, this would let you check and calibrate with any non-linear characteristics.
TomGeorge:
Hi, your solution would work, however you are assuming a linear relationship.
You would produce a more accurate conversion by taking readings at 0, 100g, 200g, 300g and so on, this would let you check and calibrate with any non-linear characteristics.
Tom..
Hi Tom and thanks for the answer! You're right, i think i will also get smaller range measure to have more precision...
...But what do "linear relationship" and "non linear characteristics" mean? Thanks!
VALERiOSPQR:
...But what do "linear relationship" and "non linear characteristics" mean?
It means that adding the same number of grams might not always add the same number of volts.
The word "linear" is in reference to a graph. If you draw a graph of the number of grams vs. the number of volts, will the graph be a perfectly straight line? If it is a straight line, then you have a "linear" relationship. If the graph is not a straight line, then it is not a linear relationship.
To discover this, it sounds like you will have to experiment.
