Marine Instruments User Manual

Appendix A Specifications
© National Instruments Corporation A-3 NI 5911 User Manual
Acquisition Characteristics
Accuracy
Amplitude accuracy ............................... ± 0.05% signal ± 0.0001% fs
(5 to 40° C) for all input ranges at
1 kHz (excluding ripple from
digital filters)
DC offset................................................0.1 mV + 0.01% fs (5° C to 40° C)
for all input ranges
Input coupling ........................................DC and AC, software selectable
AC coupling cut-off frequency
(–3 dB) ................................................... 15 Hz ±2%
Input impedance..................................... 1 MΩ ±2%
Max measurable input voltage............... ±10 V (DC + peak AC)
Input protection...................................... ±42 VDC (DC + peak AC)
Input bias current ................................... ±1 nA, typical at 25° C
Common-Mode Characteristics
Impedance to chassis ground ................. 10 kΩ
Common-mode rejection ratio ............... CMRR > –70 dB, (Fin < 1 kHz)
CBIHWum.book Page 3 Thursday, October 29, 1998 1:56 PM