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6.4 NOZZLE CONFIGURATION AND ADJUSTMENT
ELECTROSTATIC VOLTAGE
The electrostatic nozzle is rated for between
0
–
30,000
volts. This voltage range allows for variation in fluid viscosities
and allows for adjustments to both spray pattern and drop size.
WARNING: Do not exceed voltage rating for nozzle assembly. Serious injury or death may occur.
Initial Nozzle Configuration
1.
Begin with the nozzle tip positioned 1/2 in. (12.7 mm) to 3/4 in. (19 mm) away from the target.
2.
Position the nozzle tip so that it is pointing at the area where the spray is desired. This position may need to be
adjusted when the nozzle is spraying as other grounded objects nearby may influence the spray pattern.
3.
Apply the desired flow rate to the nozzle.
4.
Allow enough time for fluid to start dripping from the nozzle tip before applying voltage.
5.
Start with the voltage at zero and slowly increase—watch for the drops on the tips of the spray nozzles to form
into a small cones. These small cones will have a series of single file droplets propelling off from the tip. At the
lower end of the voltage range, the droplets will be heavier with spaces in between.
6.
As voltage is increased, droplets will shrink and appear to be one very thin, continuous stream.
This continuous
stream is considered to be a proper spraying nozzle.
ADJUSTMENT OF SPRAY
If the spray pattern appears intermittent or has heavy drops, try one or both of the following:
1.
Increase the applied voltage.
2.
Move the nozzle tip closer to the grounded target. Ensure that the nozzle tip does not come into contact with
any moving parts. If any damage occurs to the nozzle tip, it will need to be replaced—defects in the tip will affect
the spray pattern.
—If arcing occurs: See Section 7.4 Arc Fault Troubleshooting.
ELECTROSTATIC FIELD
To control or make adjustments to the electrostatic field:
•
Change the distance between the nozzle and target.
•
Change the voltage applied to the nozzle.
The distance between the nozzle and the target will also influence any arcing of the nozzle. If the Spray Control Panel
detects an arc, it will display a fault.
