Pulse Meters - Graco Horizon Fluid Management Systems Instructions Manual

Horizon System Components

Pulse Meters

Part No. 238618, Pulse Meter
For oil, ATF, or gear lube. Measures in pints, quarts, or
gallons. Sends 200 pulses per quart (211 pulses per
liter) of fluid through it. Includes the following replace-
ment part:
Ref.
No. Part No. Description
1 239367 ELECTRONIC PULSE MODULE
Part No. 215474, Pulse Meter
For washer fluid, antifreeze, water, or oil. Measures in
pints, quarts, or gallons. Sends 10 pulses per quart
(11 pulses per liter) of fluid through it.
Pulse Meter
Part No. 238618 shown
Pulse Meter Technical Data
Category
Electrical Input Voltage
Signal Output
Maximum Fluid Flow
Maximum Operating
Pressure
Inlet/Outlet
Wiring Gauge Required
Pulse Meters
The pulse meters measure fluid flow to dispense points
and send a series of pulses back to the control mod-
ules. The control modules count these pulses to deter-
mine how much fluid has been dispensed.
1
Data
15 V Maximum
0 V OFF
15 V maximum ON
12 gpm
(45.6 liter/min.)
1500 psi (10.3 MPa, 103 bar)
1/2 npt
18 AWG up to 50 ft. (15.3 m)
The electronic portion of part no. 238618, pulse meter
for oils, ATF, and gear lube is available; see at left. The
Electronic Fluid Commander meter, part no. 236763, is
not directly compatible with the Horizon system.
Replace the electronic pulse module with part no.
239367.
If an antifreeze/washer pulse meter is already part of
Qty.
an installation (probably connected to a Modular Fluid
Commander), it can interface directly with the Horizon
1
with the addition of a resistor/capacitor network to the
cable to ensure proper reading of the pulses.
During the setup of the Horizon software, each pulse
meter is defined, including the number of pulses per
unit of fluid. This pulse constant can be input for differ-
ent units of fluid measure, and can also be used to
fine-tune the accuracy of the measurement.
The number of pulse meters in a system is the key to
supporting simultaneous dispensing of fluids.
D With one pulse meter in the line of each fluid being
controlled and monitored (which is the minimum
requirement), the Horizon will support one reel
dispensing each of the fluids at a given time. The
groups of reels that share a pulse meter are re-
ferred to as Fluid Zones.
D If more than one reel of a given fluid must be able
to dispense simultaneously, additional pulse meters
must be installed in that fluid's plumbing.
D If all reels for a fluid must be able to dispense at the
same time, a meter must be installed at each reel to
measure the fluid dispensed there. To support
simultaneous dispensing to many areas, the fluid
system (particularly the pump) must be sized prop-
erly.
For more information on setting up fluid zones, simulta-
neous dispensing, and placing pulse meters in the
system, see System Configuration, page 83.
Pulse Meter Specifications:
D Up to 6 pulse meters can be connected to each
control module.
D If there is one pulse meter per fluid, it should be
located near the pump.
D If there are multiple meters for a single fluid, check
valves should be placed in series with each meter
to prevent false counting of pulses due to pulsation
(see page 106).
D The pulse meter for a dispense point does not have
to be connected to the same control module as the
air or fluid solenoids used to control that dispense
point.
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