TeeJet 854 Sprayer Control - Manual (Page 9)

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4
854 Sprayer Control
Regulation.Parameters
The regulation algorithm is configured with the next
three parameters:
1. Minimum Regulating Valve Voltage: the
minimum voltage that can drive the regulating
valve.
2. Regulation Stop Band: the maximum allowed
application error rate.
3. Rotation Time of Regulating Valve: the total
time required to close the regulating valve at
maximum speed.
These three OEM parameters depend on the
regulating valve used.
Minimum Regulating Valve Voltage
The console uses variable voltages to drive the
regulating valve. Select the minimum voltage that
the regulating valve needs to make it turn at its
slowest rotation speed (i.e., if the motor of the
regulating valve turns with a minimum of 3.5v, the
number should be used in this location).
The affect of this parameter on the regulation
behavior is illustrated in Figure 2-4. This value must
match the actual operation of the regulating valve
used. Check with the valve manufacturer for the
value.
• Use the Plus or MINUS keys to change
the voltage.
• Press and hold the AUTO/MAN key for 3
seconds to set the value to “0.0”.
• Press the AUTO/MAN key once to set to the
default value of 3.5v.
• Press the PROGRAM key to accept the
value and advance to the next program step.
NOTE: Standard TeeJet Technologies regulating
valve minimum voltage is 3.5v.
If 12v is selected as a minimum voltage, no variable
voltage regulation occurs. Instead, a pulse regulation
occurs. This is necessary when using solenoid
operated regulating valves (i.e., a Ramsay valve).
Figure 3-3: Minimum Regulating Valve Voltage
rE6 3.5
Figure 3-4: Voltage Comparison
Regulation.Stop.Band
The Regulation Stop Band is the maximum error
percentage allowed on the application rate before
the regulating valve reacts (i.e., if a stop band of
1.5% is selected, there is no action on the regulating
valve if the actual application rate is within 1.5% of
the target rate). This minimum percentage prevents
the regulating valve from oscillating in a narrow band
around the target point.
• Use the PLUS or MINUS keys to change
the regulation stop band (value is expressed