Installation manual

FuelMaster
®
Installation Manual
55
per minute. This would equate to using a 1000:1 divide rate pulse output with a hose pumping 120
gallons per minute.
Dual Output Pulsers: dispensers may be tasked to provide pulse outputs to both a fuel
management system such as FuelMaster
®
, and a tank monitor/tank gauge system such as the Veeder-
Root TLS-350R. Dispensers may be equipped with pulsers with dual outputs, when necessary. Tests
have been conducted where pulses from a single output pulser in a Gasboy 9800 dispenser were shared
by both FuelMaster
®
and a Veeder-Root TLS-350R. Where this has been satisfactory with short runs of
pulser cable, it may not be satisfactory with longer runs or different pulser applications. It may be
necessary to use dual output pulsers when pulses from a single dispensing hose have to be shared with
two devices.
Opto-Isolators: prior to the availability of the Electronic Dispenser Interface Kits, Opto-Isolators were
developed to obtain pulse outputs from electronic retail dispensers. These devices were built on a small
circuit board approximately 1 inch x 2.5 inch, and sealed in heat-shrink tubing. Wires exited the heat-
shrink to make the necessary interface between the dispenser pulse circuit and the FMU. In addition to
providing a workable pulse input, these Opto-Isolators also offered a divide factor to reduce the pulse
input to a factor more workable when pulse filtering was enabled.
Where the Opto-Isolators provided sufficient accuracy for fleet operations, they were not accurate enough
for retail operations regulated by Weights and Measures. In addition, dispenser manufacturers would no
longer warrant that portion of the pulse circuit tapped into to add the Opto-Isolators. Opto-Isolators are
available for fleet (commercial) interfaces with some older Gilbarco, Tokheim, Wayne, Schlumberger, and
a few other older electronic retail dispensers. Opto-Isolators have not been developed to interface
electronic retail dispensers since the Electronic Dispenser Interface Kits have become available.
Applications for the Opto-Isolators may be found in the Dispenser Compatibility List in Appendix B.
Opto-Isolators have also been developed to improve accountability through long fueling hoses at small
airports and marinas. These devices have adjustable delays to permit the fuel hose to fully pressurize
before pulses are recorded. More details of their application are provided in Appendix E, Retail
Applications.
Quick Stop Button
Although it was more prevalent with older models of the FMU, some problems that effect FMU
operation may be remedied by merely resetting (turning off, then back on) AC power to the FMU. Since
the power switch is behind a locked FMU pedestal door, access is not available to the average fueling
customer. To provide a means for resetting FMU power, an optional Quick Stop Button may be installed.
The Quick Stop Button consists of an external red mushroom-shaped button attached to a two-position on-
off switch. Depressing the red mushroom-shaped button removes power. Turning the button clockwise 1/8
turn resets power. When purchased preinstalled from Syn-Tech Systems, the Quick Stop Button is installed
on the FMU pedestal approximately 14 inches above the ID plate.
The Quick Stop Button is not prewired. When used as an external on/off switch, it should be wired to
interrupt power after the surge protection, but before the Pedestal I/O Board.
CAUTION
Under no circumstances should power lines for other service island equipment be brought into the
FMU for use with the Quick Stop Button. The proximity of extraneous power lines to the FMU is in
violation of FCC regulations and will significantly reduce the reliability of FMU/Central Controller
communications.
ATTENTION
Dans aucunes circonstances doît-on introduire des câbles éléctriques d'autre îlots de service dans
le FMU pour l'usage avec le bouton "arrêt"rapide (Quick Stop Button). La proximité des câbles
étrangères au FMU viole les directives de FCC et réduirà de manière significative la fiabilité des
communications entre FMU et Côntrolleur Central.
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