Fluke 8506A Instruction Manual page 305

1
.
Send
the desired ac
volts function
command
(
VA2
for
ac coupled,
or
C2
for
dc
coupled
High Accuracy
ac
volts)
and
the
RO
range
command,
2.
Select the appropriate
reference value with the aid of
Table
2,
Recommended
values are
as follows:
a.
100
mV
range
(RO): 120
mV
@
1
kHz
b.
300
mV
range
(Rl): 390
mV
@
1
kHz
c.
IV
range
(R2):
1.2V
@
1
kHz
d.
3V
range
(R3):
3.9V
@
1
kHz
e.
10
V
range
(R4):
12V
@
1
kHz
f.
30V
range
(R5):
35V
@
1
kHz
g.
100
V
range
(R6):
120V
@
1
kHz
h.
500V
range
(R7):
500V
@
1
kHz
3.
Apply
this
value
to the
HI
and
LO SENSE
inputs
and
allow
the multimeter
to
return
at least
one
reading.
4.
Now
send the following
commands:
K
N G
(reference numerics).
5.
The
multimeter computes
the gain correction factor and
automatically
applies
it
to the next reading
in this
range. Verify proper
reference
value
entry
by
observing
that subsequent returned
readings of the reference value
equal
that
known
value
±
accuracy
specifications.
6.
Verify accuracy
at
higher input
frequencies.
The
required check frequencies
are*
10
kHz
and
100
kHz.
7.
Send
the
next higher range
command,
apply
the appropriate
reference value
(at
1
kHz), allow
the multimeter
to
return
at least
one
reading, and then send
KNG
(reference numerics) once
again.
8.
Verify gain correction entry by observing subsequently
returned readings.
9.
Verify accuracy
at
the higher frequencies
specified above.
10.
Perform
steps
7, 8,
and
9 for each higher range (R2, R3, R4, R5, R6,
R7).
11.
Remote
ac
volts calibration
is
complete once
gain
corrections
have been
entered
for
each
of the
eight ranges.
If
required, a separate
set of correction
factors
can be stored for dc coupled
ac
volts (€2). Just repeat the
entire procedure with
the
new
function
selected.
12.
If
no
further calibration
is
required, disable the
Calibration
mode
by
sliding
the rear panel switch to
OFF.