EVA
Manual
2
118144
‐
001
REV.
A
SLOW
START
RAMP
TIME
:
This
feature
provides
a
gradual
increase
of
high
voltage
until
the
preset
operating
point
is
reached.
The
slow
start
time
is
factory
set
for
six
seconds.
Other
slow
start
times
can
be
software
configured
using
the
digital
interface.
ARC
QUENCH/ARC
RERAMP/ARC
TRIP
:
These
features
allow
the
user
to
tailor
the
power
supply
to
meet
specific
needs
in
dynamic
load
applications.
The
standard
configuration
is
if
an
arc
occurs,
the
output
is
inhibited
for
approximately
one
millisecond
(Arc
Quench),
and
then
the
output
is
ramped
up
to
the
preset
level
in
two
milliseconds
via
the
Arc
ReRamp
time
period.
If
25
arcs
occur
in
a
five
second
time
period
the
unit
will
shut
down
displaying
an
“ARC”
Fault
(Arc
Trip).
Short
term
arcing
=
5
arcs/second.
A
real
time
Arc
Rate
Limiter
calculates
the
average
arcing
rate,
if
50
arcs
occur
in
a
30
second
average
time
period
the
unit
will
shut
down
displaying
an
ARC
fault.
Long
term
arcing
=
1.67
arcs/second.
See
Chapter
3
for
operating
details
and
information
for
user
customization
for
these
parameters
via
the
software
and
the
digital
interface.
INTERNAL
FAULT
PROTECTION
:
The
EVA
series
continually
monitors
internal
circuits
critical
to
the
proper
operation
of
the
power
supply.
In
the
event
that
one
of
these
circuits
malfunctions,
the
fault
detection
circuit
turns
off
the
high
voltage
and
reverts
the
unit
to
the
POWER
DOWN
mode
with
the
CONTROL
POWER
ON
indicator
lamp
flashing
slowly.
The
applicable
fault
indicator
will
be
illuminated
on
the
front
panel
diagnostic
display
requiring
the
user
to
clear
(cycle
the
CONTROL
POWER
ON
switch,
cycle
the
AC
line
power
or
toggle
the
Reset/External
Inhibit
signal
line)
before
high
voltage
can
be
re
‐
enabled.
OUTPUT
CABLE
:
All
standard
models
are
provided
with
a
ten
foot
shielded
high
voltage
output
cable.
The
cable
is
designed
so
that
it
can
be
easily
removed
from
the
mating
receptacle
located
on
the
rear
of
the
chassis.
1.2.1
Remote
Operating
Features
REMOTE
PROGRAMMING
:
Allows
remote
adjustment
of
the
output
voltage,
current,
power
and
overvoltage
regulation
parameters
via
the
use
of
external
0
‐
10Vdc
=
0
‐
100%
rated
output
voltage
sources.
REMOTE
MONITORS
:
Allows
remote
monitoring
of
the
output
voltage,
current
and
power
test
points
where
0
‐
10Vdc
=
0
‐
100%
rated
output.
REMOTE
HIGH
VOLTAGE
CONTROL
:
Allows
remote
control
of
the
HIGH
VOLTAGE
ON
and
HIGH
VOLTAGE
OFF
functions.
Signals
are
also
provided
for
remote
indication
of
HIGH
VOLTAGE
ON
and
HIGH
VOLTAGE
OFF
status.
REMOTE
POWER
ON
:
Allows
remote
control
of
CONTROL
POWER
ON/OFF
function.
This
feature
also
allows
remote
reset
of
the
power
supply
when
a
SYSTEM
FAULT
shutdown
occurs.
RESET/EXTERNAL
INHIBIT
:
This
circuit
will
reset
any
latched
power
supply
faults
and
inhibit
the
high
voltage
output.
A
logic
low/ground,
will
reset
any
fault(s)
while
inhibiting
the
high
voltage
output.
A
logic
high/open
will
allow
the
high
voltage
to
be
enabled
assuming
the
HIGH
VOLTAGE
ON
switch
(local
or
remote)
cycled.
NOTE:
The
External
Inhibit
circuit
should
NOT
be
used
for
protection
against
injury
or
for
safety
interlocking.
See
External
Interlock
for
this
type
of
safety
control.
EXTERNAL
INTERLOCK
:
Interlock
connections
are
provided
on
the
rear
panel
interface
connecter
for
connection
to
a
customer
implemented
safety
switch.
The
unit
will
not
high
voltage
enable
unless
the
interlock
circuit
is
closed.
During
high
voltage
operation,
opening
the
interlock
circuit
will
cause
the
high
voltage
to
shut
off.
This
circuit
should
be
used
for
safety
interlock
circuits.
Spellman
strongly
recommends
the
use
of
External
Interlocking
for
safety
purposes.
1.2.2
System
Status
and
Fault
Diagnostic
Display
“Dead
Front”
backlight
type
indicators
provide
system
operation
and
fault
condition
information.
If
a
fault
occurs
the
power
supply
will
revert
to
the
POWER
DOWN
mode.
This
is
indicated
by
the
flashing
of
the
CONTROL
POWER
ON
indicator.
To
reset
the
latched
fault:
cycle
the
CONTROL
POWER
ON
switch,
cycle
the
AC
line
power
or
toggle
the
Reset/External
Inhibit
signal
line.
