OPERATOR’S MANUAL
Control Point
®
11001-1489-201702 Rev B
78 / SYSTEM CALIBRATION
VALV BOOST
This value increases SYS RSPNS only at start-up to more quickly start
system spreading. The value does not affect stability when operating at the
target APR and does not normally require changing.
AFILT
This value defines the amount of feedback noise rejection. The smaller the
number, the greater the filtering. Noisy feedback sensors cause the APR's
to randomly jump around. Decreasing the AFILT may reduce the problem
but also can cause the system to become more sluggish. Typically, this
value does not require changing, but check the response time if fine tuning
becomes necessary.
PROPORTIONAL VALVE SPINNER CALIBRATION
This calibration determines appropriate values for PWM OFFSET and PWM
SAT when using a proportional valve with no feedback sensor to drive the
spinner channel, refer to (Figure 47).
1. With the spinner width adjust knob fully counterclockwise (CCW),
verify the spinner is not rotating. These checks must be performed in
the Operate mode. Rotate the spinner width adjust knob clockwise
(CW) one position and verify spinner rotates slowly. If it rotates too fast,
decrease OFFSET by one (1). If it rotates too slowly, increase
OFFSET by one (1).
2. With the spinner width adjust knob fully clockwise (CW), verify the
spinner is running at full speed. If it is rotating too slowly, increase the
SAT value by one (1) and recheck. Repeat as necessary. The
maximum value for SAT is 100.
3. If the spinner turns too fast, decrease the SAT value until a satisfactory
maximum speed is obtained. The SAT value must be greater than the
OFFSET value.
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