Fluke 8502A - Resistance Measurement Procedure; Ohms Zeroing Procedure

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.