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4708
AC
Millivolts
(LF) Calibration
(1
mV
-
100mV)
(Using
calibrated
4708
IV
Range,
Inductive Voltage Divider
(IVD) and
AC DVM)
Standardization of
DVM
Millivolt
Ranges
Calibrate the
4708
at
or close
to
the calibration points
in
the
table,
selecting
SET
as part
of
the
following procedure:
1.
4708 IVD and
AC DVM
With
OUTPUT
OFF,
connect
the
circuit for
Standardi-
zation.
2.
IVD
Set
ratio
as required for the Millivolt
Range
to
be
calibrated.
3.
AC DVM
Configure
for
measurement
at
the required Calibration
Point.
4.
4708
a.
On
AC
FUNCTION,
select
IV
RANGE.
b.
Select the
required
Frequency Range.
c.
Use
Frequency 4
1
keys
to
display
the
required
Cal.
Frequency.
d.
Use
OUTPUT
4 1
keys
to
display the required
IVD
input voltage
(if
at
Nominal
Full range,
merely
press
the
Full
range
key).
e.
Set
OUTPUT
ON;
note
DVM
reading
as
VI.
f.
Set
OUTPUT
OFF,
and
reconnect
the
circuit
for
Calibration.
g.
Select the required Millivolt
OUTPUT
RANGE.
h.
Use
OUTPUT
4 1
keys
to
display the Cal.
Voltage
on
the
OUTPUT
Display
(if
at
Nominal
Full range,
merely
press the Full
range
key).
j.
Set
4708
OUTPUT
ON
(and
if
NOT
at
Nominal
Range,
Select
SET).
k.
Use
the
4 1
keys
to adjust the
OUTPUT
Display
reading
to
obtain
VI
on
the
DVM.
l.
Execute
the calibration
by
pressing
the
CAL
key. Set
OUTPUT
OFF.
Nominal
CaL
Points
for Millivolt
Ranges.
IVD
Ratio
(IV Range
to
mV
Range)
4708
OUTPUT
RANGE/
FREQUENCY
4708
Nominal
OUTPUT
Voltage
Freq.
band
set
by
4708
10:1
lOOmV
IkHz
1
00.0000m
V
LF
100:
1
lOmV
IkHz
lO.OOOOmV
LF
1000:
1
ImV
IkHz
1.
0000m
V
LF
8-14
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