Originally posted by Nemo55
The chips are another techs problem, My job was to essentially measure flow through on my truck mounted equipment and adjust accordingly.
All States and Provinces SUGGEST seasonal calibration, but the oil companies are largely left to police themselves along with the Contracted
suppliers.
(the equipment on the truck was considered correct absolute)
As to the Formulas used to arrive at a given rate etc, this stuff i learned and answered during my training but quickly discarded when actually
working in the field because of the "Shop Calibration" on the truck mounted equipment, No need for the operator to do much else except use his/her
eyes, and the charts provided.
The Tolerance of any particular gas pump was largely immaterial unless there where wild fluctuations recorded.
For each ground container location there would be a (provided to me)check sheet giving any particular peculiarities but largely seen as insignificant
unless in cases of leaks or Contaminant penetration to the tanks.
In reality my job was reduced to that of a Mechanic Technician Service Person, as the equipment on the truck and its Calibration was monitored and
adjusted when needed, by a whole different department.
I don't have my manuals any longer(was required to return them when i quit) but wicki has the info you are looking for.(always made my head hurt)
http://en.wikipedia.org/wiki/Thermal_expansion
Most Station operators do not have the where withal to make any changes to the pumps without the help of the calibrating personnel (Me) and affecting
change with the digital equipment on the Pump Head readout was definitely largely(except for very crude adjustments)outside of my capabilities.
Mostly they will be found to have broken the Seal put upon the Calibration Valve(by someone like me)and adjusted the flow rate themselves.
The Customer would never know if the rate was + or - even 30% unless they where dispensing the fuel into a calibration vessel.
But you can rest assured that a full 75% of the pumps out there are adjusted to favor the Oil companies in the region of 2% which is very hard to
notice without the right equipment. |