Appendix A Specifications
NI 4050 User Manual A-2 www.ni.com
DC Current
Accuracy (% of reading ± µA)
DC current measurements require the use of the CSM current shunt
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 mΩ
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.
* Requires 200 mA shunt, CSM-200mA.
** Requires 10 A shunt, CSM-10A.