posted on Dec, 27 2018 @ 11:54 PM
a reply to: DigginFoTroof
Where I live, the petroleum division of the State Commission handles petro regulations and they do calibration checks twice a year. I would call them
or weights and measures and give them pump # and product type and they will come out and check it. There's also calibration stickers on the pump that
should tell you the last calibration readings. You usually have a permissible error of +3 to -3 off 0 per 5gls of fuel. It's a fairly small
discrepancy when the meters are in tolerance.
The only way to properly check calibration is with an actual calibration can or system, in high flow and slow flow delivery, at the pump. If all
the pumps of one type of product are off, it's usually a sub pump gasket in the tank thats gone bad, thats inducing air into the line. When this
happens it may read $5.00 on the pump but only have $3.00 of product delivered, not a common problem but it does happen.
I was in the petroleum industry for many years and there's a lot of variables involved with petro e.g;. product type, air density, air temp, specific
gravity, humidity, ground/tank temp, length and diameter of gas lines, steel or fiberglass lines, rate of pipe incline, etc., all of these factor into
contraction and expansion of product and delivery system. So yep, things can change fairly often.
edit on 27-12-2018 by mtnshredder because:
(no reason given)