Precision AC Current Shunt Set
Electrical Specifications
5
Resistance Specifications
Shunt Nominal
Current
Nominal
Resistance
(Ohms)
Maximum
Deviation
from Nominal
Resistance
(±
μΩ
/
Ω
)
[2]
Uncertainty of
Calibrated
Value at 95%
Confidence
(
±μΩ
/
Ω
) TCal
±1ºC
12 Month
Stability
(
±μΩ
/
Ω
)
[1][2]
Temperature
Coefficient
(±ppm/ºC)
[2]
Power
Coefficient
Multiplier
(±ppm)
[2][3]
1 mA
800
250
8.2
18
5
1
10
mA
80 250
6.8 18 2.5 1
20
mA
40 250
8.2 18 4.5 1
50
mA
16 250
8.3 18 4.5 1
100
mA
8 250
8.3 18 2.5 2
200
mA
4 250
8.6 18 3.5 4
500
mA
1.6
250
9.6 18 4.5 13
1
A 0.8
250
9.3 18 4.5 26
2
A 0.4
250
9.4 18 4.5 26
5
A 0.16
250
9.9 18 4.5 30
10 A
0.08
250
15
18
4.5
65
20 A
0.04
250
14
18
4.5
78
50 A
0.016
250
24
18
4.5
105
100 A
0.008
250
28
18
4.5
105
[1] Stability specification combines long term change due to aging (permanent) and short term fluctuation due to humidity
changes
when shunts are used and stored within specified humidity limits
. Add 20 ppm if humidity is
>
50 % RH)
[2] Assume rectangular distribution when combining with other uncertainty contributions.
[3]
Calibrated resistance values include the effects of power coefficient at the nominal current. For currents other than nominal,
apply the correction for power coefficient from:
⎥
⎥
⎦
⎤
⎢
⎢
⎣
⎡
⎟⎟
⎠
⎞
⎜⎜
⎝
⎛
−
×
=
2
min
1
_
_
al
No
Applied
I
I
Multiplier
t
Coefficien
Power
Correction
[4] TCal = ambient temperature at calibration
Summary of Contents for A40B
Page 6: ...A40B Instruction Manual iv...
Page 8: ...A40B Instruction Manual vi...
