Ransburg Voltage Master 2 78789_LEPS5001 - Manual (Page 35)

OVERLOAD
ADJUSTMENT
PROCEDURES
The overload adjustment is not as critical for FM
listed systems such as the Aerobell 33 or REA- III
atomizers since safety is built into the applicators
through the use of fixed resistors and/or specially
formulated semi-conductive bell cup coatings.
However, the overload circuit is still important,
even if set to the least sensitive setting, in the
event that a HV cable should fail or other electrical
discharge should occur, or if the output current
increases due to contamination of the applicators
or an abnormal increase through the fluid supply
lines to the applicators.
Procedure for FM Listed
Systems
For FM listed systems, it is only necessary to set the
current overload to approximately 50 microamps
above the highest observed operating current.
Procedure for Unlisted Systems
The following presumes that all components of the
system have been correctly installed and checked.
1. Fill all fluid lines with the material that will be
used to coat the production parts.
>
The current overload MUST be adjust-
ed as described in the following. Protection
against inadvertent arcing that is capable of
causing a fire or explosion is lost if the current
overload is not properly set. Frequent power
supply overloads indicate a problem in the
system that requires immediate correction.
W A R N I N G
!
2. Position production parts in front of the applicator
at the distance that will be used during production.
If more than one applicator or applicator station
is connected to the power supply, then position
parts in front of all applicators.
3. Place the ACTUAL/SETPOINT switch in the
SETPOINT position. Set the current overload
range switch to HIGH (see following note). Turn
the control panel on. Set the current overload
adjustment fully clockwise to the maximum reading
of approximately 1500.
4. Adjust the KV ADJUST knob fully counter-clock-
wise to the minimum setting.
5. Make sure all system interlocks to the power
supply are activated. The yellow HV READY
indicator should be on.
6. Turn HV on by rotating the HV ON/OFF switch
to the HV ON position and release. The yellow KV
READY indicator should turn off and the HV ON/
OFF switch should be illuminated red. KV should
now be displayed on the KILOVOLTS meter.
>
Since most coating materials are flam-
mable and the possibility of arcing may exist
during this adjustment procedure, DO NOT
trigger the fluid on during this procedure.
W A R N I N G
!
>
There are two full-scale overload cur-
rent ranges available, 0-500 microamps
and 0-1,500 microamps. The ranges are
selected by a slide switch located on the
inside of the control unit door on the printed
circuit board (see Figure 12). The switch
setting indicated by LOW corresponds to
the 0-500 micro-amp range and HIGH cor-
responds to the 0-1,500 microamp range.
NOTE
Voltage Master 2 - Operation
31
Ransburg
CP-02-02.6