Very interesting : thank you for sharing ! I am planning to build suche a "calibration" device for a DIY project. and this will be precious However, I noted a few things /question. 1-Air bubbles DON'T impact pressure reading...in fact this aparatus could operate on air pressure as well (if the piston fits accuratly enough and you allow for a little constant air inlet in the circuit (small enough that the pressure loss in the circuit can be neglected) 2- Two digit on the spread sheet is jut out of purpose : the instrument you are testing has a 10 kN/m² scale, it's not supposed to read 19... same apply to the gravity value 9.81 is WAY too accurate (it's LOWER than 9.80 in Dallas or L.A.). 3- I wonder what diameter the tube/piston is. It's not making any sense in mm nor Imperial. 244.8 mm² is not a round value either... 3- Seting up an experiment with water on a wooden bench is probably not the best idea.
Thanks for the excellent tutorial.
Very interesting : thank you for sharing ! I am planning to build suche a "calibration" device for a DIY project. and this will be precious
However, I noted a few things /question.
1-Air bubbles DON'T impact pressure reading...in fact this aparatus could operate on air pressure as well (if the piston fits accuratly enough and you allow for a little constant air inlet in the circuit (small enough that the pressure loss in the circuit can be neglected)
2- Two digit on the spread sheet is jut out of purpose : the instrument you are testing has a 10 kN/m² scale, it's not supposed to read 19... same apply to the gravity value 9.81 is WAY too accurate (it's LOWER than 9.80 in Dallas or L.A.).
3- I wonder what diameter the tube/piston is. It's not making any sense in mm nor Imperial. 244.8 mm² is not a round value either...
3- Seting up an experiment with water on a wooden bench is probably not the best idea.
You should rotate the masses before taking the readings, to ensure there is no effect of the piston touching the wall of the tube.
excellent video, thank you
What are the reason for error?
how then do you correct this hysteresis error?