QT Technologies LLC
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has a weather proof Plexiglas shield over
its top - the pedestal is designed to be
mounted first and allow the system to be
operated in manual mode prior to terminal
head startup.
The pedestal is designed with two doors
separated by a shelf that is over 18” from
the bottom (Figure 7). The shelf can be
drilled for conduit holes so that rigid, ex-
plosion-proof conduit can be stubbed up to
the shelf. Once wires in the conduit are
pulled and rung out, they can be termi-
nated to a circuit board that goes inside
the pedestal called the Dispenser Pump
Interface (DPI) board .
System Requirements
The QT Technologies Model 3000 Auto-
mated Fuel Terminal has been designed
to directly control between one to four me-
chanical pumps or dispensers. It comes
equipped to handle two dispensers.
An optional expansion kit consisting of a
second DPI board will provide support for
an additional two dispensers.
Note: The QT Technologies M3000 can also
control some electronic dispensers. Call QT
Technologies for guidance if you have an elec-
tronic dispenser.
The following list of items are required
equipment to successfully interface a me-
chanical dispenser with the Model 3000
fuel terminal:
1. A fuel flow pulser must be fitted to each dis-
penser. It may be configured to generate either
100 pulses/gallon or generate pulses from the
penny wheel. When using the penny wheel, the
pulser should provide one pulse per penny of
fuel dispensed. The pulsers may be either solid
state or dry contact but should be capable of
switching a 12 or 24 volt DC load at a fre-
quency of up to 200 pulses/second. The West-
ern Electronics and OPW model 500 and
Veeder-Root solid state pulsers have been
used with good success (Figure 2).
2. A dry contact switch which closes when the
mechanical register has been reset to zero
AND opens when the pump handle is returned
to the "OFF" position (Figure 3).
3. An electrically operated main flow valve that
will allow full fuel flow when provided with a
115 VAC source.
4. An electrically operated slow flow valve which,
when energized at 115 VAC, will restrict fuel
flow to about 1-3 gallons per minute.
5. If an electric reset motor is used, it should also
operate at 115 VAC (A separate signal is pro-
Figure 2—Flow Pulser Types
Note: There are models of this pulser that are
designed to mount on the penny wheel and
will not work with gallon only meters
High Voltage 110VAC Pulser
