HP 3490A - M E a S U R E M E N T S E Q U E N C

Section
I
Model 34904
Table
1-1. Specifications
(Cont'd).
RATIO
(Option
0801
Ratio
Measurement
Input
Configuration:
3 wire;
External
Reference
Low
is conlmon
with Input
Low.
External
Reference
High
may be
positive
or
negative with
respect
to
Low.
I
nput
Ratio
=
Ext. Ref.
External
Reference
lnput
Resistance:
> 107O
DC/DC
Measurement
Accuracy:
Ext.
Ref. Range
!
(Ao/o
of
Reading
r
Bo/o
of lnput
Range
+
-
Ext. Ref .
Voltage
/
External
Reference
Ranges:
1V:1O.1
Vtot1.2V
10V:
tlVto112V
{1
V range
should
be used
for
greater
accuracy
if
the Ext- Ref'
voltage
is between
1
V and
1.2
V.
Input Ranges:
DC:
o.1
V
to
1000
V
AC:
1 V
to 1000
V
xC%of
Input
Range)
Ext.
Ref.
Range
lnput
Range
1V
1V,
10V
100
v, 1000
v
A B
c
A
B
c
A
B
c
24
hours
(23"C
I
1"c)
tov
1V
.003
.001
.oo2
.o03
.002
.002
.002 .001
.oo2
.002
.002
.002
.003
.001
.002
.005
.003
.002
3o days
(23"c
r
5"c)
10v
1V
.oo7
.005 .0m
.008.015.003
.002
.003
.002
.o03
.012
.003
.005
.003
.002
.006
.o12
.003
9o days
(23"c
t
s"cl
10v
1V
.o07
.oo5
.002
.008
.015 .003
.002
.003
.002
.o03 .012
.OO3
.006
.o03
.002
_007 .01
2 .003
6
months
(23oc
r
s"cl
10v
1V
.007
.005
.002
.008
.015
.003
.002
.003
.oo2
.003
.012
.003
.007
.003
.002
.008
.012
.OO3
1
year
123oc
t
5"c)
10v
1V
.o07 .005
.002
.008
.o15
.o04
.003
.o03
.002
.004
.012
.004
.008
.003
.o02
.o09.012.OO4
Notes:
1.
On the
lOOO
V range, add
0.04
PPM/volt
to the %
of reading
specification'
2.
EMF's
generated
external to
the
34904
{lay
b9
cgmpensated
to achieve
the
%
of
range
accuracy
specified
by
utilizing
the
rear
panel
ThermafAdjust
provided'
DC/DC Temperature
Coeff
icient:
!
lo/o
of
Reading
+
%
of Input
Range)/-C
Ext. Ref.
Range
lnput Range
1V
1V,
10V
100
v,
1000
v
'10
v
1V
r
{0.0003
+
0.0007}
r
(0.0004
+
0.0021
r
(0.0001
+
0.00041
r
(0.0002
+
0.0021
=
(0.0005
+
0.0004)
(0.0006
+
0.002)
t
DC/DC
Measurement
Accuracy
Example:
lnput
Voltage
=
0.5 V; Input
Range
=
1
V
Ext.
Ref.
Voltage
=
0.5
V; Ext. Ref .
Range
=
1
V
30 day
spec.
=
t
(0.0037o
of Reading
+
O.O12%
of lnput Range
Ext. Ref. Range
x 0.003% of Input
Rangel
Ext. Ref
.
Voltage
Ratio Reading should be 1.00000
0.003% of Reading
=
3 counts
O.O12% of Input Range
:
12
counts
*
x o.oos"Ä of Input Range= 6
counts
.5V
Total rror tolerance
=
21
counts
Display should be
0.99979
to 1.00021
AC/DC
Measurement
Accuracy
:
10
V Ext.
Ref.
Range: Same
as
AC Voltage
aocuracy
1 V
Ext. Ref.
Range:
^
24 hours
123-C
t
1-C)l Same^as
AC
Voltage accuracv
30 davs
to 1
year
Q3-C
x
5-C):
Add
o.01
to
%
of
Rang
AC
Voltage accuracy
{See
Table
1-1 of
main
34904
manual.l
AC/DC
Temperature
Coeff
icient:
10V
Ext.
Ref.
Range:
Same
as
AC
Voltage
temperature
coefficient
1 V
Ext. Ref.
Range:
Add
0.001
to
o/o
ol Range
in AC
Voltage
temperature
coeff icient
specif
ication
(See
Table 1-1
of
main 3490A
manual.)
tt
t-
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