Fluke 410B - Output Voltage

ra&ftSKS:
410B
2-5.
INITIAL
OPERATION
2-6 The
following
procedure
is
recommended
when
turning
on the
Model
410B
for
the
first
time
after
ship-
ping
or
a long
period
of
idleness.
This
procedure
will
minimize
the
possibility
of
accidental
damage
to
the
un
.
a.
The
410B
is
shipped
with
the
series
passing
tube
removed
from
the
socket
and
packed
in
a
carton,
which
is
fastened
to
the
top
cover.
Install
this
tube
in
its
socket
and
connect
the
plate
wire
to
the
plate
cap
before
aDDlvine
power
to
the
instrument,
b
Connect
the
line
plug
to
a
115
vac
power
source
(or
230
vac
if
so
wired).
WARNING
The
round
pin on
the
polarized
three
-prong
plug
connects
the
instrument
case
to
power
system
ground.
If a
three-to-two
pin
adapter
is
used to
connect
to a
two-contact
outlet,
connect
the
short
lead
on
the
adapter
to
a
good
ground.
Always
cover
the
unused
output
connectoi
with
the
cover
provided
to
prevent
acci-
dental
contact
with
the
high
voltage,
and
dirt
accumulation
on
the
connector.
c.
Set
the
HIGH
VOLTAGE
switch
to
STANDBY-
RFSET
d.
Set
the
POWER
switch
to
ON.
The
POWER
lamp
will
illuminate.
After
approximately
_3C
'seconds,
the
time
-delay
relay
will
close
and
the
STANDBY
-RESET
lamp
will
illuminate.
CAUTION
The
410B
is
designed
for
convection
cooling
without
the
use
of
fans.
For
bench
top
operation,
the
rubber
feet
must be
installed
or
other
steps
taken
to
ensure
adequate
spacing
for
unrestricted
air
flow
through
the
vents
in
the
bottom
cover.
e
Set
the
second
OUTPUT
VOLTAGE
dial
to
500
f
After
the
STANDBY-RESET
lamp
illuminates,
set
the
HIGH
VOLTAGE
switch
to
ON.
Carefully
observe
if
the
HIGH
VOLTAGE
lamp
illuminates
and
if
the
output
voltage
rises
to
within
3%
of
500
volts
as
indicated
by
the
panel
meter.
CAUTION
If
the
output
voltage
exceeds
approximately
500
volts,
immediately
set
the
HIGH
VOLT-
AGE
switch
to
STANDBY-RESET.
g.
If
the
output
voltage
is
500
volts,
the
supply
may
be
operated
as in
paragraph
2-7
or
2-8.
If
the
output
is
not
500
volts,
perform
steps h.
through
j.
h.
Set
the
HIGH
VOLTAGE
switch
to
STANDBY-
RESET.
i.
Locate
and
correct
the
source
of
trouble.
Refer
to
Section
IV.
j.
Repeat
the
initial
operating
procedure.
2-7.
GENERAL
PURPOSE
USE
a.
Set
the
HIGH
VOLTAGE
switch
to
STANDBY-
R
b
SE
Set
the
POWER
switch
to
ON.
The
POWER
lamp
will
illuminate.
After
approximat.
sly
:
^noT^FT
time
-delay
relay
will
close
and the
STANDBY-
RESET
lamp
will
illuminate.
c
Set
the
POLARITY
switch
to
the
desired
polarity,
dl
Connect
the
load
to
the
power
supply.
Be
sure
the
connection
is
firm.
WARNING
This
instrument
can
produce
lethal
voltage.
Always
set
the
HIGH
VOLTAGE
switch
to
STANDBY
-RESET
and
wait
until
the
output
decays
to
zero
before
connecting
or
dis-
connecting
the
load.
e
Set
the
OUTPUT
VOLTAGE
controls
to
the
desired
output.
Check
the
external
circuit
for
conflicts
in
grounding
before
applying
power
to the
load.
CAUTION
The
sampling
string
resistors
in
the
410B
are
subject
to
damage
if
the
output
voltage
is
reduced
too
rapidly.
Pause
approxi-
mately
1/2
second
in
each
switch
position
when
reducing
the
setting
of
the
first
decade
switch
(1000
volt
increments).
f.
After
the
STANDBY-RESET
lamp
illuminates,
set
the HIGH
VOLTAGE
switch
to ON.
The
STANDBY-
RESET
lamp
will
extinguish
and
the
HIGH
VOLTAGE
ON
lamp
will
illuminate.
The
meter
will
indicate
the
ap-
proximate
output
voltage.
NOTE
If
the
overcurrent
trip
level
has
been
re-
duced
to
less
than
8
ma,
it may
be
necessary
to
set
the
HIGH
VOLTAGE
switch
to ON
with
a
reduced
output
voltage
to
prevent
actuating
the
overcurrent
trip.
In
this
case,
step
e.
,
above,
would
follow
step
f.
Figure
2-2
is a
graph
of
the
approximate
maximum
output
voltage
increment
vs.
the
overcurrent
trip
setting.
For
example,
if the
overcurrent
trip
point-
has
been
reduced
to
6 ma,
the
output
voltage
must
be
set
to
less
than
3000
volts
(approximately)
to
prevent
actuating
the
overcurrent
trip
when
the
HIGH
VOLT-
AGE
switch
is
set
to ON.
Figure
2-2
is
typical,
and
is
intended
to
show
only
the
general
characteristic.
To
remove
the
high
voltage
from
the
output
con-
nectors,
set the
HIGH
VOLTAGE
switch
to
STANDBY-
RESET.
2-8.
TISE
AS
A
CALIBRATOR
2-9. The
410B
may
be
used
for
direct
calibration
of
dc
instruments
to
an
accuracy
of
better
thani
0.
5
25%
or
250
millivolts
at any
voltage
up
to 10,
000
volts.
The