Model:
9110,
9111
Multi
Range
DC
Power
Supply
USER
MANUAL
1
Safety
Summary
The
following
safety
precautions
apply
to
both
operating
and
maintenance
personnel
and
must
be
followed
during
all
phases
of
operation,
service,
and
repair
of
this
instrument.
Before
applying
power
to
this
instrument:
•
•
•
•
•
Read
and
understand
the
safety
and
operational
information
in
this
manual.
Apply
all
the
listed
safety
precautions.
Verify
that
the
voltage
selector
at
the
line
power
cord
input
is
set
to
the
correct
line
voltage.
Operating
the
instrument
at
an
incorrect
line
voltage
will
void
the
warranty.
Make
all
connections
to
the
instrument
before
applying
power.
Do
not
operate
the
instrument
in
ways
not
specified
by
this
manual
or
by
B&K
Precision.
Failure
to
comply
with
these
precautions
or
with
warnings
elsewhere
in
this
manual
violates
the
safety
standards
of
design,
manufacture,
and
intended
use
of
the
instrument.
B&K
Precision
assumes
no
liability
for
a
customer’s
failure
to
comply
with
these
requirements.
Category
rating
The
IEC
61010
standard
defines
safety
category
ratings
that
specify
the
amount
of
electrical
energy
available
and
the
voltage
impulses
that
may
occur
on
electrical
conductors
associated
with
these
category
ratings.
The
category
rating
is
a
Roman
numeral
of
I,
II,
III,
or
IV.
This
rating
is
also
accompanied
by
a
maximum
voltage
of
the
circuit
to
be
tested,
which
defines
the
voltage
impulses
expected
and
required
insulation
clearances.
These
categories
are:
Category
I
(CAT
I):
Measurement
instruments
whose
measurement
inputs
are
not
intended
to
be
connected
to
the
mains
supply.
The
voltages
in
the
environment
are
typically
derived
from
a
limited-‐
energy
transformer
or
a
battery.
Category
II
(CAT
II):
Measurement
instruments
whose
measurement
inputs
are
meant
to
be
connected
to
the
mains
supply
at
a
standard
wall
outlet
or
similar
sources.
Example
measurement
environments
are
portable
tools
and
household
appliances.
Category
III
(CAT
III):
Measurement
instruments
whose
measurement
inputs
are
meant
to
be
connected
to
the
mains
installation
of
a
building.
Examples
are
measurements
inside
a
building's
circuit
breaker
panel
or
the
wiring
of
permanently-‐installed
motors.
Category
IV
(CAT
IV):
Measurement
instruments
whose
measurement
inputs
are
meant
to
be
connected
2
to
the
primary
power
entering
a
building
or
other
outdoor
wiring.
Do
not
use
this
instrument
in
an
electrical
environment
with
a
higher
category
rating
than
what
is
specified
in
this
manual
for
this
instrument.
You
must
ensure
that
each
accessory
you
use
with
this
instrument
has
a
category
rating
equal
to
or
higher
than
the
instrument's
category
rating
to
maintain
the
instrument's
category
rating.
Failure
to
do
so
will
lower
the
category
rating
of
the
measuring
system.
Electrical
Power
This
instrument
is
intended
to
be
powered
from
a
CATEGORY
II
mains
power
environment.
The
mains
power
should
be
120
V
RMS
or
240
V
RMS.
Use
only
the
power
cord
supplied
with
the
instrument
and
ensure
it
is
appropriate
for
your
country
of
use.
Ground
the
Instrument
To
minimize
shock
hazard,
the
instrument
chassis
and
cabinet
must
be
connected
to
an
electrical
safety
ground.
This
instrument
is
grounded
through
the
ground
conductor
of
the
supplied,
three-‐conductor
AC
line
power
cable.
The
power
cable
must
be
plugged
into
an
approved
three-‐conductor
electrical
outlet.
The
power
jack
and
mating
plug
of
the
power
cable
meet
IEC
safety
standards.
Do
not
alter
or
defeat
the
ground
connection.
Without
the
safety
ground
connection,
all
accessible
conductive
parts
(including
control
knobs)
may
provide
an
electric
shock.
Failure
to
use
a
properly-‐
grounded
approved
outlet
and
the
recommended
three-‐conductor
AC
line
power
cable
may
result
in
injury
or
death.
Unless
otherwise
stated,
a
ground
connection
on
the
instrument's
front
or
rear
panel
is
for
a
reference
of
potential
only
and
is
not
to
be
used
as
a
safety
ground.
Do
not
operate
in
an
explosive
or
flammable
atmosphere
3
Do
not
operate
the
instrument
in
the
presence
of
flammable
gases
or
vapors,
fumes,
or
finely-‐divided
particulates.
The
instrument
is
designed
to
be
used
in
office-‐type
indoor
environments.
Do
not
operate
the
instrument
•
•
•
•
•
•
•
In
the
presence
of
noxious,
corrosive,
or
flammable
fumes,
gases,
vapors,
chemicals,
or
finely-‐divided
particulates.
In
relative
humidity
conditions
outside
the
instrument's
specifications.
In
environments
where
there
is
a
danger
of
any
liquid
being
spilled
on
the
instrument
or
where
any
liquid
can
condense
on
the
instrument.
In
air
temperatures
exceeding
the
specified
operating
temperatures.
In
atmospheric
pressures
outside
the
specified
altitude
limits
or
where
the
surrounding
gas
is
not
air.
In
environments
with
restricted
cooling
air
flow,
even
if
the
air
temperatures
are
within
specifications.
In
direct
sunlight.
This
instrument
is
intended
to
be
used
in
an
indoor
pollution
degree
2
environment.
The
operating
temperature
range
is
0
°C
to
40
°C
and
the
operating
humidity
range
is
≤
80%
relative
humidity
with
no
condensation
allowed.
Measurements
made
by
this
instrument
may
be
outside
specifications
if
the
instrument
is
used
in
non-‐
office-‐type
environments.
Such
environments
may
include
rapid
temperature
or
humidity
changes,
sunlight,
vibration
and/or
mechanical
shocks,
acoustic
noise,
electrical
noise,
strong
electric
fields,
or
strong
magnetic
fields.
Do
not
operate
instrument
if
damaged
If
the
instrument
is
damaged,
appears
to
be
damaged,
or
if
any
liquid,
chemical,
or
other
material
gets
on
or
inside
the
instrument,
remove
the
instrument's
power
cord,
remove
the
instrument
from
service,
label
it
as
not
to
be
operated,
and
return
the
instrument
to
B&K
Precision
for
repair.
Notify
B&K
Precision
of
the
nature
of
any
contamination
of
the
instrument.
Clean
the
instrument
only
as
instructed
4
Do
not
clean
the
instrument,
its
switches,
or
its
terminals
with
contact
cleaners,
abrasives,
lubricants,
solvents,
acids/bases,
or
other
such
chemicals.
Clean
the
instrument
only
with
a
clean
dry
lint-‐free
cloth
or
as
instructed
in
this
manual.
Not
for
critical
applications
This
instrument
is
not
authorized
for
use
in
contact
with
the
human
body
or
for
use
as
a
component
in
a
life-‐support
device
or
system.
Do
not
touch
live
circuits
Instrument
covers
must
not
be
removed
by
operating
personnel.
Component
replacement
and
internal
adjustments
must
be
made
by
qualified
service-‐trained
maintenance
personnel
who
are
aware
of
the
hazards
involved
when
the
instrument's
covers
and
shields
are
removed.
Under
certain
conditions,
even
with
the
power
cord
removed,
dangerous
voltages
may
exist
when
the
covers
are
removed.
To
avoid
injuries,
always
disconnect
the
power
cord
from
the
instrument,
disconnect
all
other
connections
(for
example,
test
leads,
computer
interface
cables,
etc.),
discharge
all
circuits,
and
verify
there
are
no
hazardous
voltages
present
on
any
conductors
by
measurements
with
a
properly-‐operating
voltage-‐
sensing
device
before
touching
any
internal
parts.
Verify
the
voltage-‐sensing
device
is
working
properly
before
and
after
making
the
measurements
by
testing
with
known-‐operating
voltage
sources
and
test
for
both
DC
and
AC
voltages.
Do
not
attempt
any
service
or
adjustment
unless
another
person
capable
of
rendering
first
aid
and
resuscitation
is
present.
Do
not
insert
any
object
into
an
instrument's
ventilation
openings
or
other
openings.
Hazardous
voltages
may
be
present
in
unexpected
locations
in
circuitry
being
tested
when
a
fault
condition
in
the
circuit
exists.
Fuse
replacement
Fuse
replacement
must
be
done
by
qualified
service-‐trained
maintenance
personnel
who
are
aware
of
the
instrument's
fuse
requirements
and
safe
replacement
procedures.
Disconnect
the
instrument
from
the
power
line
before
replacing
fuses.
Replace
fuses
only
with
new
fuses
of
the
fuse
types,
voltage
5
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