BK Precision 114B Instruction Manual
H(PBECiligffi'I'
H(PBECilJ#gd'
lnstruction
Manual
PN:
481 400'9-00'l
Printed
in Chlna
@2002
8&K
Precision
CorP
22820
Savi
Ranch
ParkwaY
Yorba
Linda,
CA 92887
USA
TEL:
(714) 921-9095
FAx.
(714J 921 6422
w.DKpreclslon
com
1148
Analog
Multimeter
SAFETY
^r
wanNthrc
An
electrical shock
causing 1 0 mA
of
current
tc
pass
through
the heart
will
strtp most
httnan lrcarlbeats.
\/oltage
as
/ow
as 35
volts
dc or ac rms
should
be
considered
dangerotts and
hazardotts
since
it can
produca a lethal currcnt under
ceftain
conditions.
Higher
currents are
even
rnore
dangerotts.
Observe the following
safety
precautions:
1.
Nevor apply input
voltages
ltreater
than those listed in
the
"SPECIFICA-
TIONS" section.
Personal injury
or damage
to
thc
instrument may
occLlr.
2.
This meter is
not recommended
for
high
rroltage
indr-rstrial
rrse;
for
example.
not for measurements
of
440
\1
AC or
600
\/
AC industrial
powe!.
mains.
The
unit is intended
for use with
low energy oircttits
to
/50 V AC or l0fl0
V DC
or
high energy
circuits
to 250 V
DC or AC. Accidental
misuse by connection
across a
high voltage,
high energy
power
sotlrce
when lhe
meter is set
rrp
for
mA measurement
may be
very
hazardous.
3. Turn
equipment
off before making
rest
connections
in high voltage
circuits
Discharge hlgh
voltage
capacitors aftg!"remDVinq
power.
4. When making
voltage or
current measurements
in high voltage eqtlipment,
never touch equipment,
meter,
or test
leads
urhile power
is
applied.
5. lf
possible,
familiarize
yotlrself with
the
eqLripment
boinq tested and
ihe
location
of its
high
voltage
points.
Flowever.
remenlbor
thal
hiqh
voliage
mav
appear
at unexpected
points
in defective eqrlipmer]l.
6. Be
careful
to
avoid
touching a
hiqh
voltage
point.
Remember
tllat ac line
volf-
age mav
be
present
in equipment under
test
(for
example, at on-nIf
switch'
fuses, lransformer.
etc.). any
time the eqllipment
is
connercted
to
an ac otitlet,
even if it is
turned off.
7.
When removing
the cover
for servicing or battery
replacernent,
remove test
leads and
make sure that
the inpLtt
is
disconnected
from any high
voltage.
8. Use
the time
proven
"one
hand
in
lhe
pocket"
technique
while handling an
instrument
probe.
Be
particularly
careful
to
avoid
contacting a
nearby metal
object that
could
provide
a
good
ground
return
path.
10,
When
using a
probe,
only
touch the insulated
ponion.
Never touch the
exposed
tip
ponion.
Use an insula.ted floor material
or a large, insulated
floor mat to
stand
on, and
an insulated work surface on
which to
place
equipment;
make certain such
surfaces are not damp
or
wet.
When testing ac
powered
equipment, remember that
ac
line voltage is usually
present
on some
power
input
circuits such as on-off
swilches,
fuses,
power
transformers,
etc., any time the equipment
is connected to
an
ac out-let. This
is true even if the
eouioment is turned off.
Some equipment with a two-wire
ac
power
cord. including
some
with a
polar-
ized
power plug,
is the
"hot
chassis" type.
This includes most recent tele-
vision
receivers and audio
equipment. A
plastic
or wooden cabinet insulates
the chassis
to
protect
the customer. When
the cabinet is removed for servic-
ing, a serious
shock hazard exists if
the chassis is touched. To make
measurements in
"hot
chassis'equipmenl.
always connect an isolation trans-
former
between the ac outlet and
the equipment under test. The
BK Precision Model TR-1 1
0 or 1 604 lsolation Transformer,
or Model 1653 or
1655 AC Power Supply
is suitable for most
applications. To be on the safe
side, treat
all two-wire ac
powered
equipment as
"hot
chassis" unless
you
are
sure it has an isolated
or eanh
ground
chassis.
On inslruments
or any equipment with
a three-wire
ac
power plug,
only
use a
3-wire
outlet. This is a safety feature
to keep the housing
or other exposed
elements at
eanh
ground.
Never
work alone. Someone
should be nearby
to render aid if necessary.
Training
in CPR
(cardio-pulmonary
resuscitation) first
aid is highly
recommended.
SPECIFICATIONS
Accuracy
specifications
apply
from
+
DC
VOLTS
Ranges:
SensitivitY:
AccuracY:
AC
VOLTS
Ranges:
SensitivitY:
i
Accuracy@50/60H2:
:
FrequencY
ResPonse:
(t1 dB)
bc
cuRnelt
j
,
Ranges:
'
Accuracy:
Burden
Voltage
hrstsratce
Ranges:
AccuracY:
Maximum
OPen
Circuit
Voltage:
Maximum
Short
Circuit
Current:
18
"C
to
+28
"C
0-300mV,
3V,
12V'
30
V'
'120
V'
300
v, 1 200
v
20,000
ohms
Per
volt
t
3olo
of
full scale
0-12V,
120V,
300v,
1200v
9,000
ohms
Per
volt
t
4%
of
full scale
12
V
range:
40 Hz
to 100
kHz
120
V
range:
40 Hz
to
10 kHz
300
V range:
40
Hz to
5
kHz
1200
V range:
40
Hz
to 1
kHz
0-50pA,
3mA.
30mA,
300mA,12A
t 3%
of
full
scale
Less
than
600
mV
RX1,
0 to
2
kohms,
mid
scale
20
ohms
RXl0,
0 to
20
kohms,
mid
scale
200
ohms
R
X 1k,
0 to
2
Mohms,
midscale
20
kohms
R
X
10k, 0
to 20
Mohms,
midscale
200
kohms
I 3%
of
full
scale
RXl,Xl0,Xlkranges:3V
R X
10k
range:
9
V
R X
1
rangei
150
mA
RX
10
range:
15 mA
RXlkrange:150PA
R X
10K
range:
100
UA
11.
12
13
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