EVA
Manual
32
118144
‐
001
REV.
A
Chapter
7
MAINTENANCE
This
section
describes
periodic
servicing
and
performance
testing
procedures.
WARNING
THIS
POWER
SUPPLY
GENERATES
VOLTAGES
THAT
ARE
DANGEROUS
AND
MAY
BE
FATAL.
OBSERVE
EXTREME
CAUTION
WHEN
WORKING
WITH
HIGH
VOLTAGE.
7.1
Periodic
Servicing
Approximately
once
a
year
(more
often
in
high
dust
environments),
disconnect
the
power
to
the
unit
and
remove
the
top
cover.
Use
compressed
air
to
blow
dust
out
of
the
inside
of
the
unit.
Avoid
touching
or
handling
the
high
voltage
assembly.
Be
sure
that
the
fan
is
not
obstructed
and
spins
freely.
The
fan
has
sealed
bearings
and
does
not
need
lubrication.
Be
sure
to
replace
the
cover
before
operating
for
proper
cooling.
Turn
the
chassis
over
and
remove
the
bottom
cover.
Use
compressed
air
to
blow
dust
out.
NOTE:
On
10kV
and
below,
an
air
insulated
high
voltage
section
is
used.
Avoid
touching
or
handling
the
high
voltage
assembly.
Be
sure
to
replace
the
bottom
cover
before
operating
the
unit.
7.2
Performance
Test
WARNING
HIGH
VOLTAGE
IS
DANGEROUS.
ONLY
QUALIFIED
PERSONNEL
SHOULD
PERFORM
THESE
TESTS.
High
voltage
test
procedures
are
described
in
Bulletin
STP
‐
783,
available
by
clicking
the
following
link
Standard
Test
Procedures
for
High
Voltage
Power
Supplies
.
Test
equipment,
including
an
oscilloscope,
a
high
impedance
voltmeter,
and
a
high
voltage
divider
(such
as
the
Spellman
HVD
‐
100)
is
needed
for
performance
tests.
All
test
components
must
be
rated
for
applicable
operating
voltage.
7.3
High
Voltage
Dividers
High
voltage
dividers
for
precise
measurements
of
output
voltage
with
accuracy
up
to
0.1%
are
available
from
Spellman.
The
HVD
‐
100
is
used
for
voltages
up
to
100kV,
the
HVD
‐
200
measures
up
to
200kV
and
the
HVD
‐
400
measures
up
to
400kV.
The
Spellman
HVD
divider
is
designed
for
use
with
differential
voltmeters
or
high
impedance
digital
voltmeters.
The
data
sheet
for
Spellman’s
series
of
HVD
dividers
can
be
viewed
by
clicking
here
.
