HP 3457A - 5-39. AC Volts Offset & Gain Calibration - Front Terminals; 5-41. AC Current Calibration - Front Terminals

3457A
Calibration
5-39. AC Volts Offset & Gain Calibration - Front Terminals
.
&
5-40.
Equipment
Required.
An
AC
Voltage
Source
capable
of
providing
30
mYrms,
300
mVrms,
|
Vrms,
2
Vrms,
3
Vrms,
30
Vrms
and
300
Vrms
(40.1%)
at
a
frequency
of
1
KHz
is
required
to
calibrate
the
AC
Voltage Function.
a. Select the AC Voltage function. (Press the ACV function key).
b.
Run
the
AC
Auto-Calibration
routine.
(Press
the
AUTO
CAL
configuration
key,
enter
the
number
2
and
press
the
ENT
key).
c.
Set
the
AC
Voltage
Source
to
provide
a
3
volt,
|
kHz
signal
and
connect
it
to
the
front
panel
HI
and
LO
input
terminals.
The 3457A must be calibrated on the 3 volt range before calibrating the other
ranges. This is because the offset constant for all ac voltage and ac current ranges
is computed while calibrating the 3 Vac range.
d,
Set
the
3457A
to
the
3
volt
range.
(Use
the
f
or
|
seroll
keys
to
select
the
proper
range).
e.
Use
the
following
procedure
to
calibrate
the
Gain
on
the
30
mV,
300
mV,
3
V,
30
V
and
300
V
AC
ranges
beginning
with the
3
V
range.
eS
1,
Set
the
3457A
to
the
appropriate
voltage
range.
(Use
the
t
or
J
scroll
key
to
select
the
proper
range).
2.
Set
the
output
of
the
AC
voltage
source
to
provide
a
full-scale
reading
on
the
HP
3457A.
3.
Access
the
Calibration
Command.
(Press
the
Blue
SHIFT
key,
then
the
OFFSET
COMP
/
C
configura-
tion
key).
The display
will
show
CAL.
4,
Enter
the
value
of
the
input
voltage
(in
volts).
(NOTE:
If
the
security
feature
has
not
been
disabled
(set
to
0),
it
will
be
necessary
to
enter
the
input
value,
the
delimiter
(
,
)
and
the
security
code).
5.
Press
the
ENT
key.
The
display
will
show
CALIBRATING
while
the
calibration
routine
is
running.
f. Repeat steps "el " through " e4 " for each of the remaining ranges.
g.
Set
the
output
of
the
AC
Voltage
Source
to
0
and
disconnect
it
from
HP
the
3457A.
5-41. AC Current Calibration - Front Terminals
5-42,
Equipment
Required.
An
AC
Current
Source
capable
of
providing
30
mA
(4.14%),
300
mA
(4.14%)
and
1
A
(+.24%)
at
a
frequency
of
1
KHz
is
required
to
calibrate
the
AC
Current
Function.
a. Select the AC Current function. (Press the ACI function key ).
b.
Set
the
AC
Current
Source
to
provide
an
output
of
30
mA
and
connect
it
to
the
HP
3457A
front
2
panel
I
and
LO
input
terminals.
5-11