Patent ID: 7909069

Claim:
A method for adjusting a vapor recovery system in a fuel dispenser having one or more dispensing points adapted to fuel ORVR and non ORVR-equipped vehicles, comprising the steps of: collecting A/L ratio data for a plurality of fueling transactions at the fuel dispenser using measurements from at least one air flow sensor coupled to the fuel dispenser vapor recovery system and from at least one fuel meter that indicates an amount of fuel dispensed by the one or more dispensing points; excluding ORVR fueling transactions from the collected A/L ratio data to form a non-ORVR A/L ratio data set; calculating a desired A/L calibration adjustment value for the fuel dispenser vapor recovery system based on the non-ORVR A/L ratio data set and a permitted A/L ratio range; and adjusting the fuel dispenser vapor recovery system based on the A/L calibration adjustment value.