BK Precision 177/V-95 User Manual

.Ihis
vTVM is a
highly sensitive
electronic
AC voltmeter,
and since
the humarr
body
and
Iong unshielded
test
leads
pick
up
AC
voltage
radiations
when near any
sources
of
such radiation
such as
power
lines,
the meter
may indicate
this
pickup,
antl
consequently
reduce
the accuracy
of the
voltage lLeasurement.
Therefore
for
utmost
accuracy
when measuring
low
voltages
in high
impedance
circuits
the
user
should
avoid
holding
the test
probe
in his
hand.
A
good practice
is to use
an
alligator
clip or
wire hook
of some kind
on
the end of the
probe
tip to clip
to
the voltage
point,
so that the
hands may
be removed
entirely from
the
probe
while
reading the
test voltage.
RESISTANCE
MEASUREMENTS
To
measure resistance
with the VTVM,
set the function
switch
to the
"OHMS"
position,
and the
range switch
to a
position
that
will result
in the
meter
pointer
reading
as
near to
midscale as
possible.
set
the
AC-oHMS
DC switch
on the test
probe
to the
"AC-OHMS"
position,
then
attach
the common
alligator
clip to
the
probe
tip
and set the
meter
pointer
to
ZERO on the ohms
scale
by rotating
the
iZERO"
control.
Then disconnect
the
alligator clip
from
the
probe
tip
and use
the
.,OHMS
ADJ."
control
to
set the
pointer
to
exactly full
scale, marked
"co"
(infinity).
Connect the
common
test
lead alligator
clip
to one side
of the
resistance
to
be measured,
and
the
probe
tip to
the other
side.
Read the resistance
on
the
ohms scale,
and
multiply
the
proper
factor
for the
range being used.
Set
Function
Switch
to
"OHMS"
position,
and
Switch
in the
probe
to
"AC-
OHMS''.
RESIS'TANCII
TO
BE
MENSUNIiD
SE'f
RANGD
SWITCH
TO
MULTIPLY
RDADING
BY
.2 to
1000
O
1000
to
10000
O
10000
to
100000
O
100000Oto1Meg
1 Meg
to
10 Meg
10 Meg
to 100 Meg
100 Meg
to
1000 Meg
Rx1
Rx10
Rx100
R x 1000
Rx10K
Rx100K
RxlMeg
1
10
100
1000
10,000
100,000
1,000,000
READING
THE
NTETER SCALE
The
needle should
be set
to mechanical
zero when the
instrument
is
turned
oll.
This
is accomplished
(if
necessary)
by using
the screwdriver
adjustment
to
zer<-r
set
the
pointer.
The
voltage markings
on
the
RANGE
switch
indicate
the
corresponcling
lull
scale
reading
on the
corresponcling
meter scale.
The
low voltage
AC scales,
0-1.5
RMS,
0-5 RMS'
and
4
P-P,
14 P-P
are sel
apart from
the
other
AC voltage
scales
and separately
calibrated
to
give
more
accurate
readings.
The
diode
rectifiers
within
the instrument
inherently
have a
portion
-rf
their characteristics
in a
non-linear
region.
when
rectifying
low
AC
voltages,
those
non-linearities
become
prominent in the
metering
circuit
and would
lead
[o inaccuracies
if the
meter
scale
were
not
properly
calibrated
to account
for
them
and to
make
suitable
correction.

BK Precision 177/V-95 Specifications

General

Brand	BK Precision
Model	177/V-95
Category	Measuring Instruments
Language	English