Installation manual

FuelMaster
®
Installation Manual
138
Setup Considerations for Weights and Measures Compliance
Self-serve retail fueling applications are obligated to meet the compliance requirements of their local
Department of Agriculture, Weights and Measures (W&M) department to sell fuel to the public. Even
though one document (NIST Handbook 44) is usually referenced for requirements, local regulations may
be tailored by location. The considerations mentioned herein may not apply to every application. Action or
expense should not be obligated to meet the requirements mentioned herein unless specifically
addressed by your local W&M inspector. These considerations are provided to inform you of the
assistance which is available from Syn-Tech Systems, Inc., to meet your W&M requirements. Some
locales have more stringent requirements than others.
Pulsers: W&M inspectors will look for fuel quantity and pricing accuracy to 0.01. In order to attain this
level of accuracy, pulser divide rates should be no less than 100 pulses per gallon (100:1).
NTEP C.O.C.: a National Type Evaluation Program (NTEP) Certificate of Conformance (C.O.C.) label
is required. FuelMaster
®
has met the requirements of the NTEP (awarded NTEP Certificate of
Conformance 02-115 in 2002), and this information is documented on the FMU ID plate. The dispensing
equipment may require the same certification.
Receipts: Handbook 44 requires a printed ticket displaying, as a minimum, the total price, the total
volume, and the price per gallon. FMUs provided for retail operations will have a receipt printer. Most
common is the pedestal receipt printer attached to the FMU so the fueling customer may receive a receipt
at the FMU. An indoor receipt printer is also available.
Installation techs who install FMUs at retail sites will attempt to wire pump handle detection for the
dispensing equipment. The presence of pump handle detection will ensure a receipt is printed as soon as
the pump handle (or switch) is turned off. Without pump handle detection, a receipt will not print until the
pump finish timer times out. If the pump finish timer has a long delay, the customer may have a long wait
until the receipt prints.
Check Valves: fuel hoses at small airports may be 50 feet long and hold over 2 gallons of fuel. If there
isn’t a uniform method for controlling the fuel in the hose, some customers could drain the hose and get
fuel from the previous customer’s transaction. There should be check valves at both ends of the hose to
prevent it from being drained. This ensures a uniform starting and ending point for fuel flowing from the
fueling hose. Many W&M inspectors will look for the presence of check valves.
Delaying Counts During Hose Pressurization: check valves will not hold fuel at the same
high pressure applied by the pump motor. If they did, the hoses and pump seals would have very short
lives. When the fueling hose has been at rest for several minutes and the pump motor is turned on, some
additional quantity of fuel will pass through the metering device as the hose is pressurized. This quantity
may be recorded and billed without being delivered to the fueling customer. W&M inspectors will not
approve this. FuelMaster
®
has a solution to prevent billing the customer for this fuel he/she did not
receive. Some electronic fuel dispensers have provisions for this. Others do not.
For those systems which do not have these provisions, the solution is to delay counting fuel until the hose
is fully pressurized. This is accomplished by placing an adjustable delay in line with the pulser, and an
electronic counter to work in conjunction with the delay. The delay is an Opto-Isolator. The electronic
counter is the Large Remote Display. Quantity is not recorded as the fueling hose is pressurized.
Counting of fuel quantity begins when fuel is delivered from the fuel nozzle. The large remote display, the
receipt from the receipt printer, and the FMU displayed quantity all agree.
Unit Cost Display: a Unit Cost Display must be available for customers. There is an option to turn on
pump pricing in the FMU. When set, the first depression of the FMU “A” key on the keypad will display
pump pricing for the first hose. Depressing “A” again will display pump pricing for the second hose, etc.
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