National Instruments NI 4050 用户手册
Appendix A
Specifications
A-2
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DC Current
Accuracy (% of reading ± µA
)
DC current measurements require the use of the CSM current shunt
modules.
modules.
Input Characteristics
200 mA shunt
Input protection ...............................Fuse F1 500 mA/250 V fast
fusing
Shunt resistor ...................................1
Ω
Burden voltage.................................< 400 mV at 200 mA
10 A shunt
Input protection ...............................Fuse F1 12.5 A/250 V fast fusing
Shunt resistor ...................................10 m
Ω
Burden voltage.................................< 300 mV at 10 A
Range
24 Hour
(25 °C ± 1 °C)
90 Day
(25 °C ± 10 °C)
1 Year
(25 °C ± 10 °C)
Temperature Coefficient
(% of Reading/°C ± µA/°C)
200.000 mA
*
0.1% ± 27 µA
0.14% ± 250 µA
0.15% ± 250 µA
0.0035% ± 25 µA
20.0000 mA
*
0.1% ± 27 µA
0.14% ± 250 µA
0.15% ± 250 µA
0.0035% ± 25 µA
10.0000 A
**
0.02% ± 4 mA
0.035% ± 26 mA
0.035% ± 26 mA
0.007% ± 2.5 mA
Accuracy numbers are for 5 1/2 digits and include the effects of full-scale and zero-scale errors, temperature variation,
linerarity, and noise.
linerarity, and noise.
*
Requires 200 mA shunt, CSM-200mA.
**
Requires 10 A shunt, CSM-10A.