A principal engineer at my company always adds the word 'CONSTRAINED' next to a flatness callout on plastic parts for the Datum A feature, as shown in the picture attached. When I asked him about it, he explained that this allows the vendor to apply some pressure to the part when measuring...
moltenmetal,
Thanks for linking me to that article. I love seeing the theory behind the charts. So basically what we are saying is that rotameters are calibrated for air at a specific pressure. If we use it at a different pressure, we need to adjust for that. This will still leave the...
Sorry for the delay in response. It has been one crazy week at work.
The meter we use is the 7520 & 7530 Series - Acrylic Tube Flowmeter series (http://www.kinginstrumentco.com/7520_7530/7520_7530.html). These have a float inside of a "tube" and as the air flow past it, it raises to the flow...
Hi David,
Thanks for your prompt reply. So what you are saying is the flow meter I have is already compensated for my airflow being at 100PSIG? Or would I need to convert using that equation you provided?
Thanks,
Ryan W.
Hi All,
Our machine uses compressed dry air to power certain sub-systems (pressurized systems such as isolation, or hydraulics) and as cooling air for hot items. If I measure the airflow coming from the regulator at the wall to the machine by installing a flow meter in line, I am measuring the...
