Chapter 7
58
SCS 4000/5000 Series™ Installation & Operation Manual
System (Pressure) Gain
The default setting for the system gain value is 100. To adjust the system aggressiveness, enter a value
between 1 and 999 as necessary.
Note:
It is recommended to increase or decrease the current value in increments of 10 or less when
making adjustments to the system gain setting. If the new value does not produce significant or
notable changes in the system response, increments of 20 may be used.
Increase the system gain value if the observed product pressure increases too slowly or if the system takes a
long time to reach a set standby pressure or rate input change. If the system is consistently over shooting a set
standby pressure or oscillating around a target rate, decrease the system gain value until the system stabilizes.
Granular Applications
Boom Cal
For Gran 1 (single belt) applications, enter the total width of the spread pattern in inches [cm] as boom 1 cal.
For Gran 2 (split belt) or Gran 3 (dual encoder) applications, enter the left side spread pattern as boom 1 cal
and right side spread pattern as boom 2 cal.
Spreader Constant
Note:
The spreader constant should be verified by performing the procedure in the Verification of
Spreader Constant section on page 59.
For Gran 2 or Gran 3 applications, gate width is the total of both openings.
Standard Rate display
For Rates displayed in 1 pound increments, the formula to calculate the spreader constant is:
Where SC = the Spreader Constant, L = Length of belt travel in inches per 1 revolution of the encoder,
GH = Gate Height in inches, GW = Gate Width in inches.
For Example:
Given a Length of belt travel of 13 inches, a Gate Height of 7 inches and a Gate Width of 15 inches:
Enter 228 as the Spreader Constant if the field computer is set to display English units.
SC
311040
L
GH
×
GW
×
----------------------------------
=
311040
13
7
×
15
×
---------------------------
228
=
