In the previous blog post we went through a couple examples outlining the importance of having the correct atmospheric pressure entered into an Electronic Flow Meter’s configuration. So how do we go about determining the correct atmospheric pressure at a given location?
Some EFMs have built in capability to determine atmospheric pressure based on elevation. Assuming the technician on location had access to a GPS it would stand to reason they could determine their current elevation and rely on the flow computer to do the rest. This works well enough, but what if the technician doesn’t have access to a GPS, or what if the flow computer is incapable of calculating atmospheric pressure based off of elevation?