Fluke 8506A Instruction Manual page 125

390
mV
1.1V
390
mV
0
.
01
%'*
110
mV***
0
.
01
%**
IV
0
.
01
%**
3.9V
0
,
01
%**
10V
0
.
01
%"
35V
0
.
01
%**
100V
0
.
01
%**
300V
0
.
01
%**
AH
accuracy tolerances are plus or
minus
(±).
The 540B
must be characterized by
a
standards
lab to
support these
accuracy
tolerances.
'Characterized points aiso
used
in
the Calibration
Procedure.
"Accuracy requirement
for
voltage
at
frequency points.
***ii0
mV
ieveis are established using the
540B and
other equipment as detailed
on
the
performance
test
****The
required ranges, frequencies
and
uncertainties are detailed
below.
All
540B
characterizations
need
to
be
performed
at
full
range
only.
54GB
UNCERTA
!NTY
OF CORRECTION
(±)
RANGE
"~~"'sOo'"hz
""To~kHz
"~20kHz
50
kHz
T
100
0.5
V 0.005%
-
0.005%
0.01%
IV 0.005%
-
0.005% 0.01%
5V
0.005%
-
0.005% 0.01%
10V 0.005%
-
0.005% 0.01%
50V
0.005%
-
0.005% 0.01%
-
0.05%
100V 0.005%
-
0.005% 0.01%
0.05%
300V 0.005% 0.005%
10.
Using
the
5200A
settings
recorded
in
step 7
above, check
the
first
two
voltage/ frequency
combinations
(20
Hz
and
1
kHz)
m
Table 4-5 for the
stated tolerances.
Record
the displayed reading
on
the
UUT
for
1
kHz.
11.
Complete
the
Low
Frequency
Attenuator
Accuracy
Test (described
under
Calibration).
12.
Connect
the
5200 A, 540
B,
and
the
flatness
verified
20
dB
attenuator
as
shown
in
Figure
4-7.
13.
Adjust
the
5200A
output
(at
1
kHz)
for the
reading recorded
on
the
UUT
display
in
step 10
and
adjust the
540
B
for
a
null indication.
Note
the
5200A
output
setting.
Do
not adjust the
540B
controls until steps 14
and
15
have been completed.
14.
While
maintaining a null
on
the
540B
by
adjusting
the
5200A
output, check
the
last
three
voltage/
frequency combinations
in
Table 4-5
for
the stated tolerances.
15.
Return
the 5200
A
output
level (at
1
kHz)
to
the setting noted
in
step 13
and
check
for
repeatability. Verify that the
540B
is
within 0.002%
4-11