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switch,
when
the V-D.-A
slide
switch
is
in the V-D.-A position.
The range
is
one-half
that indicated
by the pointer
knob on the
RANGE
switch,
when
the V-D.-A
slide switch
is
in
the
V-A/2
position.
Select the
required
DC current
range or use the
procedure
in
#2 above
under
OPERATING
SUGGESTIONS.
Connect
the
test leads in series with
the circuit
to be measured.
Observe
polarity.
Read DC current
on the
appropriate
scale.
Be sure
to
take
the
setting
of
the V-D.
A
slide
switch
into
account,
as
described
in
the
DC
VOLTAGE
MEASUREMENTS
section.
Should
the
ranges provided
not
be sufficient
to
measure current
in your
circuit,
the
DC
voltage
ranges of your
5205
may be
uti-
lized for
this purpose.
Measure the voltage
across
a
resistor
in
the circuit
through
which
the current
flows.
If this
is
not
pos-
sible, add a small resistor
in
series
with
the circuit.
The
added
resistor,
if used,
must
be small enough
so as not
to
upset
the circuit
Measure the
volt
this
resistor.
Calculate the current
flowin
this
resistor,
using Ohm's
Law.
See th
in
Figure
1.
Here,
it is assumed
that
across
a
1-ohm
resistor.
The
curren
through
the resistor
is:
DC CURRENT
MEASUREMENTS
E
2
1
= --
=-=
2 Amps
R
1
AC VOLTAGE
MEASUREMENTS
T
2V
--.L
age across
D
g
through
e example
2 volts
is
t
flowing
I
1D.
.
FIGURE
1
Select
the
required
red AC voltage
range or
use the procedure
in
#2
above under
OPERA TI
NG
SUGGESTIONS.
Connect
the
-8-
-9-
test leads across
the voltage
to
be
measured
..
Leads
may be
connected
in either
direction.
Read
AC voltage
on the
appro-
priate
scale.
Be sure to
take
the
setting
of
the V-D.-A slide
switch
into
account,
as described
in the DC VOLTAGE
MEA-
SUREMENTS
section.
)
j
AC CURRENT
MEASUREMENTS
AC current
cannot
be measured
directly
on this
instrument.'
However,
if you need an AC current
measurement,
measure the
voltage
across a resistor
in the circuit
or
across a small resistor
wired
in series with
the
circuit.
Calculate
the
cu
rrent flowing
through
this
resistor,
using
Ohm's
Law.
See the
procedure
and
example under
DC CURRENT
MEASUREMENTS.
RESISTANCE
(OHMS) MEASUREMENTS
J
j
Set the RANGE
switch
to an OHMS range and the V-D.-A slide
switch
to
V-D.-A.
Bring
one test
lead into
contact
with
the
other
and set the OHMS
ADJ.
control
for
a
full scale reward
of
the meter
pointer.
Separate the test leads and connect
them
across
the resistor
to be measured.
Read the
resistance
on the
OHMS
scale.
Use the appropriate
multiplier
as required
for the
different
resistance
ranges.
BATTERY
CHECK
Set
the range
selector switch
to
the
BAT.
CHECK
position
Put
red
(f)
probe
into
BAT.
jack and black
e
probe
into
e
COM
jack.
When
you
test
1.5V
AA
or
AAA
size
battery,
set slide
switch
to
"1.5V
AA"
position.
When you
test
1.5V
C or D
size
battery,
set
slide
switch
to
"1.5V
C,
D"
position.
When
vou
test
9V
transistor
battery,
set slide
switch
to
"9V"
position.
Connect
red
@
probe
tip
to
®
terminal
of
the
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