Chapter 6 – Additive Control
Firmware Version 3/4.31.37
6.4 ADDITIVE UNITS
Additive totals can be displayed in one of two units: cubic centimeters (cc) or thousandths of a unit volume. The
parameter to select the desired units for additives, “Display Adtv as CCs,” is accessed from the MultiLoad II Setup
screen. When enabled, all additive related displays will show additive totals in cubic centimeters (cc). If disabled,
additive totals will be displayed in thousandths of a unit volume.
Additive units will be displayed in thousandths of the volumetric or mass units that are being used
by the main components. For example, if the k-factor of the product meter is pulses per liter,
additive units will be presented in thousandths of a liter. The option to display additives in cubic
centimeters is only valid when the product flow meters are entered in pulses per gallon.
6.5 ADDITIVE CONTROL METHODS
6.5.1 METHOD 1 – PISTON ONLY
The Piston Only method provides for the use of a piston style injector using a calibrated cylinder. This method
provides no verification of additive delivery; it merely calls for an injection as the demand for the additive
accumulates. An injection will occur as soon as enough product has been delivered to create demand for an
additive volume that is equal to one half of one injection. (See Figure 6.2) Injection size is determined by the
Volume per Injection parameter. If the injection is successful, one full injection will have been delivered before the
demand has reached one full injection. The additive Delivered totalizer will increment by one full injection volume
after enough time has passed for the piston to have returned to its starting position. The piston Throw Time
parameter determines when the system expects the injection cycle to be completed. (See Figure 6.1)
1/2 Inj Vol.
1 Inject Vol.
2 Inject Vol.
Additive
Volume
Product Delivered
1/2 Inject Deficit exists:
Injection Initiated
Right On
1/2 Inject Surplus
Additive Injection
Graph
Additive Recipe %
(Programmed)
0
Figure 6.2 Additive Injection
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