Ac/Dc Voltage - Fluke 8050A Instruction Manual

OPERATION
OPERATING TECHNIQUES
Table 2-1.
8050A
Controls, Indicators,
and Connectors
ITEM NO.
FUNCTION
1
Display
4'/2-digit
LCD
display.
Used
to indicate
measured
input values
and
an overrange
condition.
Also contains annunciators
for
high voltage,
decibel-display,
and
relative
measurement
functions.
2
AC/DC
Function
Switch
A
two-position switch (push IN
and push
OUT)
used
to select
ac
(IN)
or
dc (OUT)
for
current or voltage
measurements.
3
V/mA/kO/dB/S
Function Switches
Interlocked switches, used
with the
AC/DC
Function switch
to
select
the
measurement
functions.
Pushing one
switch
will
release the
others.
The
decibel-display function
is
selected by pushing the
V
and
mA
switches simultaneously.
The
conductance
function
is
selected
by pushing
the
kO
switch
and
one
of
two
pairs of
Range
Function
switches.
4
Range
Switches
Interlocked switches
that select the
measurement
ranges. Pushing
a switch selects the corresponding range and
releases a
depressed
switch(es).
5
mA
Input
Connector
A
fuse protected input connector
for
current measurements. Fuse
is
accessible from
the
front
panel.
6
COMMON
Input
Connector
Test
lead
connector used
as the low
or
common
input
for
all
measure-
ment
functions.
7
V/kO/S
input
Connector
Test lead
connector used
as the high input
for
ail
voltage, resistance,
continuity,
conductance and
decibel
measurement
functions.
8
RELATIVE
Function
Switch
Push-on/push-off
switch.
Used
to select the
relative
function for
all
measurements.
9
POWER
Switch
- - 1
Push-on/push-off
switch.
Used
for
energizing
and
de-energizing
the instrument.
2-1
9.
Before using
the
8050A,
it
is
important
to
note the
maximum
input
limits that
may
be
applied
to
the
instrument. Table 2-2
lists
the
maximum
signal
input
levels
allowed
for
each function, range, and
input
connector.
WARNING
TO
AVOID ELECTRICAL SHOCK, DO NOT
CONNECT
THE
COMMON
INPUT CON-
NECTOR TO
ANY SOURCE
MORE
THAN
500V DC,
OR
500V
AC RMS ABOVE EARTH
GROUND.
2-20.
OPERATING TECHNIQUES
2-2
1
.
The
following paragraphs describe
how
to operate
the
8050A
in
each
of
its
seven primary
measurement
functions.
Refer to the Applications paragraphs
for
additional
measurement
techniques.
2-22.
AC/DC
Voltage
(V)
2-23.
Figure 2-3 describes
how
to
operate
the
8050A
for
ac
or
dc
voltage
measurements. For
all
measurements,
select the highest
range
that will
provide
the required
resolution of the
measurement. Ifmeasuring an
unknown
voltage, set
the
DMM
on
the highest range, then
(if
needed)
select
a lower range.
2-24.
AC/DC
Current
(mA)
2-25. Figure 2-4 describes
how
to
operate the
8050A
for
ac or dc current measurements.
Turn
off
power
to the
circuit
being
measured
before breaking
the circuit
and
connecting
the
8050A
in series
with the current source.
To
minimize
common mode
voltages, break the
circuit
on
the
ground
side
of the current source.
The
mA
input
connector contains
an
in-line fuse. If
the
DMM
does not
respond
when measuring
current,
check
the fuse (refer to
the fuse
replacement procedure
in this section).
If
measuring an
unknown
current,
set
the
DMM
on
the
highest range, then
(if
needed)
select
a lower range.
2-3