National Instruments BNC -2140 - Manual (Page 21)

© National Instruments Corporation A-1 BNC-2140 User Manual
A
Specifications
This appendix lists the specifications of the BNC-2140 accessory. All
specifications are typical at 25 °C unless otherwise noted. All specifications
are relative to measurement standards and require a 15 minute warm-up
period. Specifications do not include transducer error.
Analog Input
Voltage Input
Number of channels ............................... 4
Maximum input voltage
(Signal + common mode voltage) .......... Each input should remain within
±42.4 V (30 V
rms
) of any other
input or of AIGND
Inputs affected........................................ ACH0, ACH1, ACH2, ACH3
Input coupling ........................................ DC
Input capacitance 1
Current Excitation
Level....................................................... 4 mA
Accuracy ................................................ ±1.31%
Temperature coefficient ......................... ±141 ppm/°C
1 Includes the effects of the BNC-2140 with a 1 m SHC68-C68-A1 analog cable.
Input Mode
Current Excitation
On Off
DIFF 85 pF 75 pF
SE 150 pF 145 pF