EVA
Manual
25
118144
‐
001
REV.
A
the
desired
level
of
the
Emission
(beam)
Current
and
Filament
Limit
Set
continue
holding
in
the
BEAM
OFF
switch
and
rotate
the
applicable
control
dial
while
noting
its
corresponding
meter
reading.
Release
the
BEAM
OFF
switch.
NOTE
:
No
actual
electron
beam
is
being
produced
at
this
time,
but
the
filament
is
operating
at
the
preheat
current
levels.
M)
Depress
the
HV
ON
switch
on
the
EVA
high
voltage
power
supply.
The
red
light
inside
the
switch
should
illuminate
and
the
output
will
slow
start
up
to
the
preset
level
output
voltage
under
a
no
load
current
condition.
NOTE
:
The
EVA
series
is
equipped
with
a
slow
start
circuit
that
ramps
the
output
up
to
its
maximum
setting
in
approximately
6
seconds
after
the
HV
ON
switch
is
depressed.
N)
Depress
the
BEAM
ON
switch
on
the
beam
controller.
The
red
light
inside
the
switch
should
illuminate
and
the
emission
(beam)
current
will
slow
start
up
to
the
preset
level,
as
displayed
on
the
front
panel
digital
display.
O)
To
terminate
the
generation
of
electron
beam,
depress
the
BEAM
OFF
switch
on
the
beam
controller.
In
the
BEAM
OFF
mode
the
beam
controllers
fault
and
interface
circuits
are
still
active
and
the
filament
is
operating
at
the
10
amp
preheat
level.
The
high
voltage
is
still
operating
at
the
present
voltage
level.
P)
To
turn
off
the
EVA
high
voltage
power
supply,
depress
the
HV
OFF
switch
on
the
EVA
high
voltage
power
supply.
In
the
HV
OFF
mode
the
EVA
high
voltage
power
supplies
fault
and
interface
circuits
are
still
active.
To
fully
turn
off
the
EVA
high
voltage
power
supply
and
EVA
beam
controller
push
in
CONTROL
POWER
ON
switch
to
release
the
switch
bezel
to
the
out
position.
All
front
panel
lights
should
extinguish.
NOTE
:
If
a
beam
controller
fault,
or
system
monitoring
fault
occurs,
the
beam
controller
will
revert
to
the
POWER
DOWN
mode.
This
is
indicated
by
neither
the
BEAM
ON
nor
the
BEAM
OFF
indicator
lamps
will
be
illuminated.
The
EVA
high
voltage
power
supply
will
shut
down
with
a
“GUN”
fault
and
the
CONTROL
POWER
ON
lamp
will
flash.
The
applicable
fault
indicator
will
be
illuminated
on
the
front
panel
requiring
the
user
to
clear
(depress
the
BEAM
OFF
switch,
or
cycle
the
AC
line
power).
The
EVA
high
voltage
power
supply
fault
is
cleared
by
cycling
the
CONTROL
POWER
ON
switch,
cycling
the
AC
line
power
or
by
toggling
the
Reset/HV
Inhibit
(50
pin
connector
pin
2)
signal
line.
WARNING
AFTER
TURN
OFF,
DO
NOT
HANDLE
THE
OUTPUT
UNTIL
THE
CAPACITANCE
HAS
BEEN
DISCHARGED!
LOAD
CAPACITANCE
MAY
BE
DISCHARGED
BY
SHORTING
TO
GROUND.
WARNING
DANGER
‐
THE
VOLTMETER
ON
THE
EVA
HIGH
VOLTAGE
POWER
SUPPLY
FRONT
PANEL
DOES
NOT
DISPLAY
THE
OUTPUT
VOLTAGE
WHEN
THE
POWER
IS
TURNED
OFF,
EVEN
IF
A
CHARGE
STILL
EXISTS
ON
THE
OUTPUT.
CAUTION
TO
ASSURE
SAFETY
AND
PROPER
COOLING
ALWAYS
OPERATE
THE
UNIT
WITH
THE
TOP
COVER
INSTALLED.
A
fan
maintains
safe
operating
temperatures
in
the
beam
controller
by
drawing
air
over
the
circuit
components.
The
cover
must
be
on
in
order
to
direct
the
air
flow
over
the
areas
that
need
cooling.
In
operation,
the
units
air
intake
and
fan
exhaust
paths
must
be
clear
of
any
obstructions
that
might
impede
the
flow
of
air.
