Appendix A
Specifications
A-4
©
National Instruments Corporation
DC Voltage Accuracy
4
Resistance Accuracy
5
4
Voltage specifications do not include errors resulting from common mode voltages. Calculate additional error because of
common mode voltages as: common mode voltage/10
(CMR specification in db/20)
.
Add
µ
V
(with Auto-zero)
15
°
–35
°
C
Add
µ
V
(without Auto-zero)
15
°
–35
°
C
Temperature
Coefficient
0
°
–15
°
C,
35
°
–55
°
C
Range
% of Reading
15
°
–35
°
C
Filter Setting
Filter Setting
Volts ° C
24 Hr
90 Day
1 Year
10 Hz
50 Hz
60 Hz
10 Hz
50 Hz
60 Hz
%Reading/
°
C
µ
V/
°
C
15
0.0146
0.0175
0.0205
28
117
141
130
193
210
0.0009
5
7.5
0.0152
0.0181
0.0211
21
71
106
125
160
185
0.0009
5
3.75
0.0164
0.0193
0.0223
14
30
42
120
131
140
0.0010
5
2.5
0.0066
0.0095
0.0125
5
17
24
24
32
37
0.0004
1
1.25
0.0072
0.0101
0.0131
3
12
18
22
29
33
0.0004
1
0.625
0.0084
0.0113
0.0143
2
6
11
22
24
28
0.0005
1
5
Resistance specifications assume worst case common mode voltage for the given range. Specifications improve if actual
common mode voltage is less than worst case. Measurement accuracy is affected by source impedance. Resistances > 25 k
Ω
may require 1 s setting time.
add
Ω
(with Auto-zero)
15
°
–35
°
C
add
Ω
(without Auto-zero)
15
°
–35
°
C
Temperature
Coefficient
0
°
–15
°
C,
35
°
–55
°
C
Range
% of Reading
15
°
–35
°
C
Filter Setting
Filter Setting
Ω
24 Hr
90 Day
1 Year
10 Hz
50 Hz
60 Hz
10 Hz
50 Hz
60 Hz
%Reading/
°
C
600000
0.0400
0.0429
0.0459
20.11
23.64
24.63
24.17
26.67
27.37
0.0013
300000
0.0406
0.0435
0.0465
19.82
21.80
23.22
23.97
25.37
26.37
0.0013
150000
0.0418
0.0447
0.0477
19.54
20.16
20.67
23.77
24.21
24.57
0.0013
100000
0.0320
0.0349
0.0379
0.51
1.00
1.28
1.26
1.60
1.80
0.0013
50000
0.0326
0.0355
0.0385
0.45
0.80
1.02
1.21
1.46
1.62
0.0013
25000
0.0338
0.0367
0.0397
0.41
0.54
0.74
1.18
1.28
1.42
0.0013
