CHAPTER 4
26 ISOBUS Product Control Installation & Operation Manual
FLOW CAL (DUAL LOOP CONTROL MODE ONLY)
The flow cal value may be used when controlling a liquid application system using a PWM control valve. This value
sets how the system responds to rate control inputs while product is flowing through the flow meter. A value
between 11 and 999 may be entered for the flow cal value. The default value for the flow cal is 103.
Refer to the Flow Cal (Dual Loop Control Mode) section on page 63 for information on the components of the flow
cal setting or on refining the flow cal value.
NOTE: It is recommended to set the Sgain value prior to making any adjustments to the flow cal value.
When adjusting the flow cal value, it is not recommended to adjust the last digit (i.e. ‘3’ in the default
value). Review the Flow Cal (Dual Loop Control Mode) section on page 63 for more information.
SGAIN (PRESSURE SYSTEM GAIN - DUAL LOOP CONTROL MODE ONLY)
The Sgain value may be used when controlling a liquid application system using a PWM control valve. Use this
value to adjust how aggressively the application system responds to pressure changes in the application system.
The default setting for the Sgain 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 Sgain setting. If the new value does not produce significant or notable changes in
the system response, increments of 20 may be used.
For example, increase the Sgain 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 Sgain value until the system stabilizes.
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