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2.
Select
the
A
AC
function.
2.
Select
the
Ohms
function.
3.
Follow
steps 3-5
listed
for
DC
Current measure-
3.
Select
the
10
ohms
range.
ments.
4.
Short input terminals
as
described
in
zeroing
2-95.
OHMS
instructions.
2-96.
Use
the following procedure
for resistance
mea-
5.
Depress
the
STORE
switch;
"?"
will
appear
in
the
surements:
display.
1
.
The
Ohms
Converter
module must
be
installed.
6.
Depress the
V DC/OHMS ZERO
switch; the value
of
residual resistance
will
be
displayed
for
as
long
2.
Select
the
OHMS
function.
as
the
switch
is
held depressed.
3.
The
8502A
will
go
to
autoranging;
manual
ranging
7.
Release
of
the
zero switch
will
activate the
Ohms
can be
selected
if
necessary.
There
are eight
resist-
ance
ranges
available;
lOOM, lOM,
IM, lOOK, lOK,
Zero
mode.
IK,
100 and
10
ohms.
2-99.
APPLICATIONS
4.
If
necessary,
perform
the
ohms
zero
procedure
2-100.
The
applications presented
in
Table
2-3
presuppose
described
below (10
ohm
range only).
an
initial
power on
or
reset
instrument
status,
i.e.,
5.
Select desired modifiers
and
memory
operations.
1.
V
DC
function.
6.
Connect
the
unknown
resistance to
the
HI and
LO
INPUT
terminals
(see
Section 6
for 2-wire
and
4-wire
connection methods).
2.
3.
lOOOV
range.
Sample
—
7.
2-97.
OHMS ZERO
4.
Filter
-
FO.
2-98.
For
ohms
zeroing, use the following
steps:
5.
No
stored values (excepting
the Calibration
Mem-
}.
The
Ohms
Converter
module must
be
installed.
ory).
Table
2-3.
Applications
STORING
A
DISPLAYED
VALUE
OFFSET
VDC/OHM ZERO
SCALING
HI
LO
APPLICATION
1
REQUIREMENT;
Monitor
the
stability
of
a
power
supply
in
terms
of
its
deviation
in
volts
from
a
present
output
of +5,
03V.
METHOD:
Store the present
output
as
an
offset.
Press:
STORE
^
OFFSET
-*
OFFSET
initial
use of
OFFSET
places the
displayed value into
memory
(value
will
be
viewed
as
long
as
switch
is
held depressed).
The
second
use of
OFFSET
places
the
instrument
in
Offset
mode.
The
display
will
now
read
only
the deviation
from +5.03V.
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