Calculating "Valve Cal; Calculating "Rate Cal - Raven SCS 660 Installation And Service Manual

5.

CALCULATING "VALVE CAL"

1) The initial Control Valve calibration number is 2123 for C-Sd, or 743 for C-FC.
After operating the system, you may desire to refine this number. See definitions
below:
For STANDARD VALVE (C-Sd):
Valve Backlash Digit
Valve Speed Digit
C-Sd Valve Control
C-F or C-FC Valve Control
Brake Point Digit
Dead-Band Digit
6.

CALCULATING "RATE CAL"

The application rate in lbs/acre [kg/ha] is entered as RATE CAL.
equipment manual to insure that the selected gate opening is capable of applying
at this application rate.
NOTE: The Spreader Constant must be recalculated anytime the gate opening is
changed.
Controls the time of the first correction pulse after
a change in correction direction is detected.
(INC to DEC -or- DEC to INC).
Range: 1 to 9
Controls response time of Control Valve motor.
CAUTION: Running the Control Valve too fast will
cause the system to oscillate.
Product 1 Range:
Product 2-5 Ranges:
Sets the percent away from target rate at which the
Control Valve motor begins turning at a slower rate, so
as not to overshoot the desired rate.
Range: 0 to 9
Allowable difference between target and actual applica-
tion rate, where rate correction is not performed.
Range: 1 to 9
12
For FAST VALVE (C-F or C-FC):
1-Short Pulse
9-Long Pulse
0 = 5%
1 = 10%
9 = 90%
1 = 1%
9 = 9%
1 to 9 1-Slow
9-Fast
0 to 9 0-Fast
9-Slow
Consult the