Ransburg 9040, Service Manual

Page: 27 / 49

9040 Low Voltage Control Unit Kit- Operation
OPERATING
PROCEDURES
1. Ensure that the AC power, low voltage
cable and high voltage cable are connected as
described in the “Installation” section of this
manual. Insure the high voltage cable is
secured into the applicator.
! C A U T I O N
>
Check that the control unit and
the remote cascade are properly
grounded to true earth ground!
2. Be sure that the high voltage adjustment
knob is turned FULLY counter-clockwise.
3.
Turn the ON/OFF switch to the ON position.
The green LED will light indicating that AC
power is being supplied to the control unit.
4.
The voltage to automatic applicators is
activated by supplying adequate pressure signals
to the control unit pressure switches or be
triggering an external high voltage control device
connected across 2PL-1 and 2PL- 2.
5.
Turn the voltage adjustment knob to the
desired operating point as indicated by the
kilovolt and microamp meters.
Kilovolt and Microamp Meters
The kilovolt meter indicates the voltage in
thousands of volts (kV) present at the applicator
electrode. The microamp meter indicates the
current in millionths of amps (
m
A) leaving the
applicator electrode.
High Voltage Adjustment Knob
The high voltage adjustment knob allows infinite
control of the applicator electrode voltage
between 0 and rated kV.
Overload Indicator/Reset Button
Lighting of the yellow overload/reset lamp
indicates that an overload condition has occurred.
The overload circuitry is integral to the control unit
and is factory calibrated and sealed. It allows
normal operation, testing and maintenance. It will
only activate if the spray applicator load
conditions exceed the pre-set limit as a result of
component (barrel, transformer, cable) failure or
improper applicator to target distance. If the
overload should trip, locate and correct the
problem. Then reset the overload by pushing the
reset switch in, or turning the ON/OFF switch OFF
and back ON again.
The overload feature can be turned ON or OFF
by moving jumper JP5 on the main PC board
(see Figure 4 for location of JP5). To turn the
overload circuit OFF position jumper JP5 so
that it covers (shorts) pins 2 and 2. To turn the
overload circuit ON position jumper JP5 so that
it covers (shorts) pins 2 and 3.
NOTE
> These
Control units for automatic
applicators are shipped from the factory
with the overload circuit ON. For this
assembly, the overload current is set to
90
mA maximum.
CP-11-01
24