Fluke 8502A Instruction Manual page 28

12
.
Measurement
Instructions
Perform
DC
ZERO,
if
necessary.
No
additional
zero procedure
is
needed
for ac voltage.
Select desired modifiers
and
memory
operations.
2-83.
DC
VOLTAGE
(V DC)
2-84.
Use
the following
procedure
when
measuring dc
volts:
1.
Select the
VDC
function.
2.
The
8502A
will
go to autoranging.
If
desired, select
manual ranging
and one of
the five available
ranges
(lOOOV, lOOV, lOV, IV,
or
100
mV).
3.
Perform
DC
Zero,
if
needed (100
mV
range
only).
4.
Select desired modifiers
and
memory
operations.
5.
Connect
the dc voltage to the
HI and
LO SENSE
INPUT
terminals.
6.
A
dc
voltage reading should
now
appear
in
the
display.
2-85.
DC
ZERO
2-86.
For dc
zeroing, use the
following
steps:
L
Select the
V
DC
function
and
either
autoranging
or the
100
mV
manual
range.
2.
Place a
good
quality,
low thermal
short across the
H! and
LO
INPUT
terminals.
3.
Depress the
STORE
switch.
"?"
will
appear
in
the
display.
4.
Depress
the
VDC/OHMS ZERO
switch; value
applied to input terminals
will
now
be displayed
as
long
as
the switch
is
held depressed.
5.
Release
of
the
switch
will
activate
V
DC/Ohms
Zero
mode,
applying the value read
in
step
4
as a
zero reference for
subsequent
readings.
2-87.
AC
VOLTAGE
(V AC)
2-88.
Use the following procedure
when
measuring ac
volts:
1.
An
AC
Converter
module must
be installed
(Option
—01,
or
—09
A).
2.
Select the
VAC
function.
3.
The
8502A
will
go
to
autoranging;
manual
ranging
can be selected
if
necessary.
There
are four
avail-
able ranges:
lOOOV, lOOV,
lOV, IV.
5.
6
.
The
slow
filter
(FILTER
LED
illuminated)
must
be
selected for
full
accuracy
below 400 Hz.
7.
Connect
the
ac voltage to the
HI and
LO SENSE
INPUT
terminals.
8.
The
ac voltage
should be read
in
the display.
2-89.
AC VOLTAGE ON
A DC
LEVEL(VDC
and
V
AC)
2-90.
Use
the following procecure
when measuring
ac
and dc
voltage;
1.
The
RMS
AC
Converter module must
be
installed.
2.
Depress both
V
DC
and
V
AC
awitches simultane-
ously.
3.
The
8502A
will
go to autoranging;
manual
ranging
can be
selected
if
necessary.
There
are four
avail-
able ranges:
lOOOV, lOOV,
lOV
or
IV.
4.
Select desired modifiers
and
memory
operations.
5.
Connect
the
unknown
voltage to the
HI
and
LO
SENSE INPUT
terminals.
The
reading displayed
will
be the rms
value
of the
two
voltages
combined.
2
-
91
.
DC
CURRENT
(A DC)
2-92.
Use
the following procedure
when
measuring dc
current:
1.
The Current Shunts module must
be
installed.
2.
Select the
A
DC
function.
3.
The
8502A
will
go to autoranging; manual ranging
can also
be
utilized to select
one of
five available
ranges
(100 uA,
1
mA,
10
mA,
100
mA,
or lA).
4.
Select desired modifiers
and
memory
operations.
5.
Connect dc
current to
HI and
LO INPUT
SOURCE
terminals.
2-93.
AC
CURRENT
(A
AC)
2-94.
Use
the following
procedure
when
measuring ac
current:
1.
The Current Shunts module must be
installed.
2-18