Calculate The Meter Cal Value; Calculate The Valve Cal Value - Raven SCS 450 Installation & Service Manual

Calculate the Meter Cal Value

No calculation of the Meter Cal value is necessary, since the flow meter calibration value is stamped on the tag
attached to each flow meter. Locate this number and write it down for future reference when programming the
console.

Calculate the Valve Cal Value

The Valve Cal figure is used to control the response time of the control valve motor to the change in the
vehicle's speed. After operating the system, this number may be refined. The initial recommended control
valve values are:
•
C-SD (standard valve) = 2123
•
C-FC (fast-close valve) = 743
•
C-F (fast valve) = 743
•
C-P (PWM valve) = 43
•
C-PC (PWM close valve) = 43
Valve Calibration Definitions
FIGURE 3.
C-SD Valve
Digit
Valve Backlash
Valve Speed
Manual No. 016-0159-831
C-F or C-FC Valve
Description
Controls the time of the first correction pulse
after a change in correction direction is
detected (INC to DEC, or DEC to INC)
Controls the response time of the control valve
motor. Caution: Running the control valve
too fast will cause the system to oscillate.
C-SD Valve
C-F and C-FC Valve
C-P and C-PC Valve
Introduction
C-P or C-PC Valve
Range Range Definition
1 = Short Pulse
1 - 9
9 = Long Pulse
Refer to Refer to specific
specific valve valve
1 = Slow
1 - 9
9 = Fast
0 = Fast
0 - 9
9 = Slow
0 = Slow
0 - 9
9 = Fast
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