Fluke 8506A Instruction Manual page 131

8506A
Table
4-14.
100V on
the
500V Range
Tests
FREQUENCY
(Hz)
MINIMUM NOMINAL MAXIMUM
20 99.895 100.000
100.105
Ik 99.959 100.000
20k 99.959
100.000
50k
99.915
100k 99.775
1
100.225
.
.
Table 4-15.
300V ©n
the
500V Range
Tests
FREQUENCY
RANGE:
500V
(Hz) MINIMUM
NOMINAL
20 299.745
1 1
300.255
Ik 299.937
300.000
300.063
10k
299,937
300.000
300.063
4-54.
CALIBRATION
ADJUSTMENTS
NOTE
The standards
called
out
in
the
following
procedure
are required
to
meet
the
published
accuracy
specifications. If
published accuracy
is
not required for a
particular
function
(e.g.
resistance
,
dc
current,
etc),
standards with a
iQypgjr
yqxccI
accuracy
may
he
used*
4- 55.
Introduction
4-56.
Calibration of
the
UUT
is
carried
out
on
three
levels.
The
first
level
consists of
an accuracy check using
the
Performance
Test.
The
Performance
Test
should be
used to
check
the
UUT
for calibration
every 90 days or
1
year, as
required
to
meet the applicable accuracy
specifications.
The Performance
Test should
also
be used
to
check
the
UUT
for calibration after
any
repairs are
made
to the
instrument.
The
second
level
involves
software calibration
and
can
be
performed
at
any
tirne.
Applicable procedures
are described
in
Appendix
7B.
The
third level
involves
hardware
calibration
and
is
described
in
the
following paragraphs.
Power
supply adjustments
are
shown
in
Figure
4-1.
Adjustments
and
test
points are
accessible
on
the
top edge
of the
peb by opening
the
hinged
module
top.
For
any
level
of calibration, the
ambient temperature
should be 23°
C
±
2°C and
the
relative
humidity should
be
less
than 75%.
Refer to
Table
4-1 for the
recommended
test
equipment.
4-57.
Initial
Procedure
4-58.
With
the
power
switch
set to
OFF,
replace the
Isolator
with
the
Bus
Interconnect
and Monitor
Board,
MIS-701
3K. Set the
power
switch to
ON
and
allow
the
instrument
to
warm-up
for at least
two
hours before
continuing with the calibration
adjustment procedures.
4-59.
Power
Supply
4-60.
Perform
the
following
Power
Supply
checks
and
adjustments. All required
test
points are available
on
the
Bus Interconnect
and Monitor
Board.
Ail
adjustments
are
found on
the
Power
Supply Board,
as illustrated in
Figure 4-1.
check
Its
own
supply
voltage.
To
avoid
this
possibility,
do
not
use
the
UUT
to
check
UUT
voltages.
1.
Connect
the
test
DMM
HI
input to
Vcc on
the
Bus Interconnect
and Monitor Board and
the
LO
input to Vss.
2.
Adjust
R6
for
a reading of 5.05V dc
±
.05
to
set
the logic
supply.
3.
Transfer the
HI
DMM
input
lead to
VA2.
4.
Adjust
R5
for
a reading of 5.05V dc
±
.05
to
set
the
analog supply.
5.
Verify that the voltages
in
Table
4- 16 are within
the prescribed
limits.
Table 4-16.
Power
Supply
Verifications
TEST POINTS
VOLTAGE RANGE
(VDC)
SUPPLY
HIGH
LQVtf
FROM TO
Vdd
Vss
4-11.4 +12.6
Logic
Vgg
Vss -11.4 -12.6 Logic
VA1
AR
+14.25
+15.75
Analog
VA2
AR
-14.25 -15.75
Analog
VA3 AR
+29.7 +31.7
Analog
VA4
AR
-29.7 -31.7 Analog
4-17