Fluke 8506A Instruction Manual page 134

8506A
6.
On
the
UUT,
verify a
reading of -0.00000
±
.
00001
.
7.
At
the
DC
Voltage Standard,
restore
the dc
output voltage
positive
polarity.
8.
Refer
to
Table
4-17.
For
each of
the Voltage
Divider
settings
listed, verify
a
UUT
reading within
the
listed
tolerances.
Table
4-17. Linearity
Checks
DIVIDER
SETTING
READINGS
MINIMUM
NOMINAL MAXIMUM
.0100000
0.99995
1
.00000
1
.00005
.0200000
1
.99995
2.00000
2.00005
.0300000 2.99995 3.00000
3.00005
.0400000 3.99995
4.00000 4.00005
.0500000 4.99995
5.00000 5.00005
.0600000
5.99995 6.00000 6.00005
.0700000 6.99995
7.00000 7.00005
.0800000
7.99995 8.00000 8.00005
.0900000
8.99995 9.00000
9.00005
.1000000
9.99995 10.00000 10.00005
.1100000
10.99994
1
1
.00000
1
1
.00006
.1200000
11.99994 12.00000 12.00006
.1300000
12.99994 13.00000 13.00006
.1400000
13.99993 14.00000 14.00007
.1500000 14.99993
15.00000 15.00007
.1600000
15.99993 16.00000
16.00007
.1700000 16.99992 17.00000
17.00008
.1800000
17.99992 18.00000 18.00008
.1900000
18.99992 19.00000 19.00008
.2000000
19,99992 20.00000 20.00008
9.
At
the
DC
Voltage Standard,
reverse the
polarity of the dc output
voltage.
For
each of
the
Voltage Divider
settings in
Table
4-17, verify a
negative
UUT
reading within the
listed tolerances.
10.
At
the
DC
Voltage Standard,
restore positive
polarity
and
adjust
for
Control
Setting
A.
1 1
.
Set
the
Voltage Divider
controls for a
ratio
of
1
.
0000000
.
12.
On
the
UUT,
verify a reading of
T
10.00000
±
.
00001
.
4-77.
RANGE
ADJUSTMENTS
4-78. All adjustments and
test
points
in the
following
procedure
are
found on
the
DC
Signal Conditioner.
References
mentioned
in this
procedure can be
typically
found on
the
top edge of
the
DC
Signal Conditioner
PCB
and
on
the inside of the hinged
module
top.
Only
the
hinged
module
top need be opened
to access
all
adjustments and
test
points.
4-79.
Use
the following
steps to adjust the 100
mV
range:
1.
Verify that the
UUT
is
set for
dc
volts,
FILTER
annunciator
off,
sample
setting
7,
and
ZERO
annunciator
off.
2.
Verify that the
DC
Voltage Standard
is
set
for
Control
Setting A.
3.
Set the Voltage Divider
controls for a
ratio
of
.0000000.
4.
On
the
UUT,
manually
select
the
1
00
mV
range.
If
required, adjust
R53
for 0
±
.0002
(-3).
5.
Set the Voltage Divider
controls for a
ratio
of
j
.
0200000
.
t\
6.
On
the
UUT,
adjust
R49
for a front
panel
display of +200.0000
(-3)
±
.0005.
4-80. Use
the
following
procedure
to adjust the IV
range;
1.
On
the
UUT,
select
the
IV
range.
2.
Set the Voltage Divider
controls for
ratio
of
.20000000.
\
:}
""7'
3.
On
the
UUT,
adjust
R48
for a front
panel
display of +2,000000
±
.000001.
4-81.
Use
the following procedure
to check
the
10V
range:
1.
On
the
UUT,
select
the
10V
range.
2.
Connect
the
UUT
directly to the
DC
Voltage
Standard
as
shown
in
Figure
4-2.
3.
On
the
DC
Voltage Standard,
set
the output
to
Control
Setting A.
4.
On
the
UUT,
verify a front panel display of
+
10.00000
±
,00002V.
4-82.
Use
the
following
procedure
to adjust the 100V
range:
1
.
Connect
the
equipment
as
shown
in Figure
4-3.
2.
On
the
UUT,
select
the
100V
range.
4-20