6
•
1
–
100%
duty cycle adjustment for PulsaJet and other electric spray nozzles.
•
Offers easy to use timing modes of Fixed Spray Time; Variable Spray Time, and Repeat.
•
Can control and drive up to ten (10) Spraying Systems Co.
®
electric spray nozzles
•
AA10000AUH
-
03 PulsaJet® spray nozzles –
Ten (10)
•
AA10000JJAU PulsaJet air atomizing spray nozzles –
Ten (10)
•
AA10000AUH
-
10 PulsaJet spray nozzles –
Three (3)
•
AA10000AUH
-
30 PulsaJet spray nozzles –
One (1)
•
AA250AUH Electric spray nozzles –
Ten (10)
•
Ambient temperature ratings for electric control panel:
•
41°F Minimum (5°C)
•
104°F Maximum (40°C)
•
Dimensions:
9” (228.6
mm) x 4
1/4” (108
mm) x 10
1/2” (266.7
mm)
For International applications be sure that you have the correct power cord.
PRECISION SPRAY CONTROL (PSC)
The PulsaJet® automatic spray nozzle is an electrically
-
activated hydraulic, atomizing nozzle. This nozzle sprays the
product in a controlled way using a PWM algorithm to control the sprayed amount without affecting the spray angle.
PWM is the fundamental control principle that allows a significant reduction in flow by regulating the relationship
between the on/off times that the nozzle operates.
Short pulses of on
-
time and longer pulses of off
-
time produce a spray pattern that appears continuous, but actually
reduces the overall flow delivered to the target surface. This provides better flow control with larger spray tips that are
less prone to clogging. The droplet size is affected by the pressure of the liquid. With PSC, the droplet size and spray
angle are independent of the liquid flow because the nozzle can work at the same liquid pressure for variable liquid
flows.
PSC involves switching the spray nozzle on and off repeatedly at a controlled rate, called the modulating frequency.
The modulating frequency is the number of times the nozzle is switched on and off in one second and is measured in
Hertz (Hz). If a spray nozzle is switched on and off 10 times per second, the modulating frequency is 10 Hz. The time
from when the nozzle turns on to the next time the nozzle turns on is called the period, in this case 1/10th of a second.
Within a single period, the nozzle is switched on, then off. The time that the nozzle is on, divided by the total time of
the period, gives a percentage which is called the duty cycle. For example, if the period is 0.10 seconds, and the nozzle
is on for half of that time, then the duty cycle is 50%. For the same period, if
the nozzle is on for 0.08 seconds then the duty cycle is 80%. Therefore, at an
80% duty cycle, the flow will theoretically be 80% of the maximum flow rate
(= 100% flow rate) at a given pressure for the nozzle. Using PSC, the flow rate
for a spray application can be easily controlled without the need to adjust the
spray pressure or spray tip.
