source
to be
measured.
On the
5V
and
500V
ranges, read the
0-5
AC-DC
scale
(black);
on
the
10V,
100V,
and
1000V ranges,
read
the
0-10
AC-DC
scale.
A-C
VOLTAGE
MEASUREMENT: Set
the FUNCTION
switch to "AC
VOLTS"
,
the RANGE switch
to the desired
voltage range,
and then
use
the ZERO
ADJ.
potentiometer to bring the
meter
pointer
to
zero*. Clip the
COMMON
lead
to ground
or
the
low side and
touch the
AC-OHMS
probe to
the high side of
the source to be measured.
On
the
5V
range, read the
special 5VAC
scale
(red); on the
500V
range,
read
the
0~5
AC
-
DC
scale
(black); on the IC'V,
100V,
and
1 000V
ranges,
read the
0-10
AC-DC
scale.
RESISTANCE
MEASUREMENT:
Set
the FUNCTION
switch
to "OHMS"
and
the RANGE
switch to the desired ohms range; connect the COMMON lead
to the AC-OHMS
lead and then use
the ZERO
ADJ.
tobring
the meter pointer
to zero; separate
the
COMMON
lead
from
the
AC-OHMS
lead
and
then
use
the
OHMS ADJ.
potentiometer to set the meter
pointer so that it reads exactly
ful
l-scale. Clip
theCOMMON
lead
to one terminal
of
the unknown
resistance
and touch or connect the AC-OHMS
probe
to the other
terminal. Read the
OHMS scale on
the
meter. On
theRXl range,
read
the
OHMS
scale
directly
in
ohms;
on
RX10,
RX1000,
and
RX10,000
ranges, multiply the
scale
reading
by
10,
1000,
and
10,000
respectively and read in
ohms;
on
the RX1MEG
range, read the scale directly in megohms.
Note:
The
small reading noted
on
the
lowest
range
is
the resistance
of the leads.
CAUTION: Never
leave the FUNCTION
switch set at the
OHMS"
position
as
this will greatly shorten the
life of
the ohmmeter battery.
DECIBEL
MEASUREMENT:
The instructions
for
decibel
measurement
are
the
same
as
for
a-c
voltage
measurement
except
that
the
DB
scale
is
read.
To
the reading
on
the
DB
scale,
add the number
of db shown
on
the
meter
as
corresponding to
the
a-c
voltage
range used.
Correction for
measuring across
different
impedances
is
included in
the
APPLICATIONS
section
under OUT-
PUT METER".
ZERO-CENTER
INDICATION:
See APPLICATIONS section.
APPLICATIONS
OUTPUT
METER:
When the
RANGE
switch is set at 10V
and the
FUNCTION
switch is set
at
AC VOLTS,
the power level in a
500
ohm circuit can
be
read
directly
in
decibels
on
the DB scale, which is calibrated
from
-
20
to
+
15
DB,
based
on
a
reference
level
of
6.0 milliwatts
and
500 ohms.
This reference
level
is
marked
"0"
decibels, and corresponds to 1.73
vac
on the
0-10
volt
scale. To
measure higher
levels,
proceed as
instructed
in
the OPERATING
INSTRUCTIONS section
under "DECIBEL
MEASUREMENT".
The DB scale on the
meter
is
calibrated across
a
500
ohm
line. If
the
DB measurement is
being made across
an
impedance
other than 500 ohms, use
*See
note
on electrostatic
pickup in the
MAINTENANCE section,
page
9.
-4-
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