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DC
Volts
(Continued)
High Resolution
(
HI
RES
or
CAL —
6
1/2
digits)
Range
Full
Scale
Resolution
Accuracy
±
(%
of
Input
+
Number
of
Digits)
24
Hours
90
Days
1
Year
1
V
2.5
V
1
uV
0.001
+
6
0.002 + 8
0.004 +
9
10
V
20
V
lOuV
0.001
or
6*
0.001
+ 8
0.002 + 9
100
V
160
V
100
uV
0.001
+6
0.002 + 8
0.004 +
9
1000
V
1200
V
1
mV
0.001
+6
0.002 + 8
0.004 + 9
*Whicheve
is
greater.
DC
Ratio
Ext. Ref.
Voltage
Accuracy
+20V to+40V
+ (A +
B
+ 10
ppm)
+V
.
*to+2QV
4A+B+2f
—
min.
—
^
Txrefl
'
A
=WV
dc
Range Accuracy
B
-Input
Signal
Function
and Range
Accuracy
V.^!^
^Minimum
Allowable External Reference
Voltage
=>Ad50/tyfe
Value
of Ex^rna!
Reference
Voltage
*The formula
for
determining
is
included
in
Instrument Operating
Characteristics
Example
Calculations for External
Reference Accuracy;
1.
Input
= +
90.000V,
Ext. Ref.
Input
=
30.000V
(+
15V
to Ext. Ref. HI.
-15V
to Ext. Ref.
LO)
A
=
.001%+
1
Digit
B =
.001%
+
1
Digit
Ratio
Accuracy
=
+ (A + B + 10
ppm)
=
+ {.001% +
1
Digit
+
.001%+1
Digit
+
.001%
-
+(.CK)3%
+2
Digits)
Reading
may
be between 3.0003 and 2.9997
2.
Input
=
1.20000V,
Ext. Ref.
Input
= .12000
(V^.^
for
IV
Range)
A
==
.001%
+
1
Diqit,
B
=
.001%
+
1
Digit,
200pDm
.02%
Vxref
-12
Ratio
Accuracy
=+.001%
+
1
Digit
+ .001%
+1
Digit
+ .1667%)
=
+{.1687%+
2
Digits)
Reading
may
be between
.998313 and 1.001686.
INSTRUMENT OPERATING CHARACTERISTICS
DC
Volts
TEMPERATURE
COEFFICIENT
(0°C
to
18°C
and
28°C
to
50°C)
INPUT
IMPEDANCE
Range
Temperature
Coefficient
Range
input
Impedance
100
mV
±
(3
ppm/reading +
0.5 digit)/°C
100
mV
>10,000
MQ,
IV
±(3
ppm/reading
+0.1
digit)/
°C
IV
>10,000
mi
10
V
±
(2
ppm/reading + 0.05
digit)/'^C*
10
V
>10,000
100
V
±
(3
ppm/reading
+
0.1 digit)/'^C*
100
V
10
1000
V
±
{3
ppm/reading
+
0.05
digit)/°C*
1000
V
10
mH
'For High
Resolution Multiply
Digits
by
10.
Guard
to Chassis
CO
INPUT
BIAS
CURRENT
Bias
Current
<±5
pA
30 Days
{23'^C
±
Tc)
<±50
pA
Temperature
Coefficient
± 3 pA/°C
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