Fluke 8506A Instruction Manual page 121

8506A
unit
under
test
(UUT). The
test
equipment
required for
the
Performance Test
is
listed in
Table
4-!.
If
the
recommended equipment
is
not available,
replacements
with equivalent
specifications
may
be substituted.
4-39,
If
the instrument does not
meet
the specifications
listed
in the
Performance
Test, either
software or
hardware
calibration or corrective
maintenance should
be
performed,
as
determined by
the
symptoms. The
test
should be
performed when
the
ambient temperature
is
between 18°
and 28° Celsius
and
the
relative
humidity
is
less
than 75%.
4-40.
OC
Performance
Test
4-41.
LOW RANGE
DC VOLTAGE
TESTS
4-42.
Perform
the
Low
Range
Tests as follows:
1.
Connect
the
equipment
shown
with
solid
lines
in
Figure
4-2.
Do
not connect
the
UUT
at this
time.
2.
Verify that
test
equipment
used
in
Figure
4-2
is
operating properly and
that respective
warmup
periods
have been
observed.
Figure 4-2.
Connections
for
Low Range
DC
Voltage Tests
3.
On
the
UUT,
verify that the specified
two-hour
warm-up
period has elapsed.
4.
On
the
UUT,
ensure
that the
V
DC
and
AUTO
annunciators
are on,
and
that the
SAMPLE
annunciator
flashes
at
approximately
eight times
per
second
(32
samples
per reading). All other
annunciators should be dark.
5.
Set the
Voltage Divider
controls for one-tenth
the
standard
ceil
certified value.
Adjust
the
DC
Voltage Standard output
for a
null
on
the null
meter. (Note: This
will
be approximately
1
IV).
6.
At
the
Voltage Divider output
terminals,
disconnect
the existing leads
and
connect the
UUT
as
shown
with the
broken
lines in
Figure
4-2.
7.
Refer
to
Table
4-2.
Without
changing
the
DC
Voltage Standard output
setting,
perform
the
six
checks
listed.
For
each
check,
set
the specified
Voltage Divider output,
select
the
listed
UUT
range
manually, and
verify
a
UUT
reading with the
tolerances
listed.
8.
At
the
DC
Voltage Standard,
reverse the
output
leads.
Now
repeat step
7,
and check
for
negative
UUT
readings with the
listed
tolerances.
Table
4-2.
Low Range
DC
Voltage Tests
RANGE
DIVIDER
SETTING
UUT
READING
MQSiHHi
100
mV
.0010000 +9.9957
(-3)
+10.0043
(-3)
100
mV
.0100000 +99,9935
(-3)
+100.0065
(-3)
IV .0100000 +.099990 +.100010
IV
.1000000
+.999977 +1 000023
10V .1000000
+.99991
+1
.00009
10V
1
.0000000 +9.99982 +10.00018
4-43.
HIGH
RANGE DC VOLTAGE
TESTS
4-44.
Perform
the
High Range
Test
as follows:
1
.
Connect
test
equipment and
the
UUT
as
shown
in
Figure
4-3.
2.
On
the
UUT.
verify that the specified
two-hour
warm-up
period has expired. Also
verify that the
test
equipment
is
operating properly and
that
required
warm-up
periods
have
expired.
3.
The
UUT
must
be
set
for
dc
volts
(V DC), 100V
manual
range,
and
SAMPLE
setting 5
(SAMPLE
4-7