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Electrical Specifications
Current Shunt Basic Specification
These devices are precision calibration reference standards. In order to attain the best performance of the product, the
end-user should develop an uncertainty analysis based on their particular use. The uncertainty analysis should include
stability of the device over time (usually much better than the specification), humidity and temperature effects for the
laboratory, measurement uncertainty of the calibrated value at DC and the uncertainty of the AC-DC difference correction
When the best performance of the product is not needed, the following table provides an approximate uncertainty stated
at k=2, approximately 95 % confidence for the calibrated value. The approximate uncertainty includes 1 year stability,
temperature effects over TCal ± 1 °C, and the measurement uncertainty of the calibrated value.
Nominal
Shunt Nominal
Resistance
Current
(Ohms)
[4]
1 mA
800
10 mA
80
20 mA
40
50 mA
16
100 mA
8
200 mA
4
500 mA
1.6
1 A
0.8
2 A
0.4
5 A
0.16
10 A
0.08
20 A
0.04
50 A
0.016
100 A
0.008
[1]
The measured current is determined from:
I = (V /R
) × (1 + (AC-DC
calibrated
[2]
Above 1 kHz interpolate the specification (s
=
+
s
s
(
f
i
lower
i
Add 20 μA/A if relative humidity is outside specification limits.
[3]
[4]
1 mA specifications apply with the battery charger disconnected.
[5]
Specifications assume no loading effects due to the voltage-sensing device. See Output Voltage Measurement - Loading
Effects in the operating information.
Basic Specification ±μA/A, TCal ±1 °C, ≤50 % RH
DC
1 kHz
20
55
20
26
20
26
20
23
20
24
20
26
21
27
21
27
21
27
21
31
26
37
26
43
32
55
35
65
/ 1,000,000)); where AC-DC
calibrated
) between frequences f
i
−
×
−
f
)
(
s
s
)
lower
upper
lower
10 kHz
75
26
26
23
24
26
27
28
30
32
60
52
80
90
is expressed in μA/A
calibrated
and f
using:
upper
lower
÷
−
(
f
f
)
upper
lower
Precision AC Current Shunt Set
Electrical Specifications
[1][2][3][5]
30 kHz
100 kHz
75
150
26
26
26
26
23
23
24
24
26
26
27
28
28
31
30
48
40
71
61
92
70
113
81
144
98
174
5
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