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APPENDIX
1
4708
AC
Current
Calibration
(100|liA
-
1
A)
(Using
verified
4708
IV
Range,
Calibrated Standard
AC
Shunts
and
AC DVM)
Remote Sense
Standardization
of
DVM
IV Range
Calibration
of
4708
Current
Ranges
Calibrate the
4708
at
or close
to
the calibration points
in
the
Nominal
Cal. Points for lOOtiA to
lA
Ranges,
table,
selecting
SET
as
required as
part
of
the
following proce-
dure:
1.
4708 and
AC DVM
With
OUTPUT
OFF,
connect
the
4708
and
DVM
for
Standardization. Select
IV
Range on
the
AC
DVM.
2.
4708
a.
Set
to
IV
Range
at
the Calibration
Frequency and
adjust for calibrated
1.
000000
V
output.
b.
Set
OUTPUT
ON
and
note
the
DVM
reading as
V
1
c.
Set
OUTPUT
OFF,
and
reconnect
the
test
circuit for
Calibration,
using
the correct
shunt
for the
range
to
be
calibrated.
d.
On ACI
Function,
select the
required
OUTPUT
RANGE.
e.
Select the required
FREQUENCY
RANGE.
f.
Use
FREQUENCY
keys
to
display the required
Cal.
Frequency.
g.
Use
OUTPUT
t keys
to
display the required
Cal.
Current
(if
at
Nominal
Full
Range,
press the Full
Range
key).
h.
Set
4708
OUTPUT
ON
(and
if
NOT
AT
Nominal
Full
Range,
Select
SET).
j.
Use
the
OUTPUT
t
keys
to
adjust the
OUTPUT
Display reading
to
obtain a
DVM
reading of
VI.
k.
Execute
the calibration
by
pressing
the
Cal
key. Set
OUTPUT
OFF.
4708
OUTPUT
RANGE/
FREQUENCY
4708
Nominal
OUTPUT
Current
Freq.
Band
set
by
4708
lOOtiA
300Hz
lOO.OOOOpA
LF
lOOtiA
5kHz
lOO.OOOOtiA
HF
1mA
300Hz
1.000000mA
LF
1mA
5kHz
1.000000mA
HF
10mA
300Hz
10.00000mA
LF
lOmA
5kHz
10.00000mA
HF
100mA
300Hz
100.0000mA
LF
100mA
5kHz
100.0000mA
HF
lA
300Hz
1.000000
A
LF
lA
5kHz
1.000000
A
HF
8-Al-l
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