I'm puzzled as to how the flowmeter (rotameter) on a regulator could be trusted.
Apart from being calibrated for a specific gas, they are also calibrated for some pressure and temperature?
Obviously gas density depends on them.
Pressure might be different depending on hose length I'm using and what not.
Ambient temperature might be comparable for indoor welders everywhere (say around 20C)
but the temperature drop from Joule-Thompson effects and heat absorbed from regulator body, friction and such..
Looking for thoughts in this. I just can't see how the readings can be useful, other than adding temp and pressure sensors and calculating sqrt(T/p) type formula's.
I had a lot of fluid mechanics in the past, math certainly isn't the problem..
Of course a welder would judge not by flowrate but by observing his weld. I'm using the regulator for a different hobby project.
Thanks for any input, cheers
Apart from being calibrated for a specific gas, they are also calibrated for some pressure and temperature?
Obviously gas density depends on them.
Pressure might be different depending on hose length I'm using and what not.
Ambient temperature might be comparable for indoor welders everywhere (say around 20C)
but the temperature drop from Joule-Thompson effects and heat absorbed from regulator body, friction and such..
Looking for thoughts in this. I just can't see how the readings can be useful, other than adding temp and pressure sensors and calculating sqrt(T/p) type formula's.
I had a lot of fluid mechanics in the past, math certainly isn't the problem..
Of course a welder would judge not by flowrate but by observing his weld. I'm using the regulator for a different hobby project.
Thanks for any input, cheers