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National Instruments Corporation
5
SCC-A10 Voltage Attenuator Module User Guide
Using the SCC-A10 when Scaling Voltage Measurements
If you configured the SCC-A10 using Measurement & Automation
Explorer (MAX) and you are using NI-DAQ, the voltage reading you get
from the E Series DAQ device accounts for the voltage scaling effect of the
SCC-A10. Otherwise, because the voltage measurement from the E Series
DAQ device is one-tenth of the voltage applied at the SCC-A10 input, you
must multiply the voltage reading from the E Series DAQ device by 10 to
get the correct SCC-A10 input voltage.
Specifications
Note
In order for the SCC-A10 to perform according to the specifications in this guide,
the
±
15 V power supply you use must be accurate to within 5%.
These ratings are typical at 25 °C unless otherwise stated.
Analog Input
Number of input channels ...................... 2 DIFF
Input range
............................................. ±
100 VDC
Input impedance ..................................... 1 M
Ω
(powered on or off)
Gain error
............................................... ±
0.14% of reading max
1
Gain-error temperature coefficient
......... ±
0.006% of reading/°C max
Offset error
............................................. ±
6.5 mV max (referred to
input [RTI]
2
)
Offset-error temperature coefficient
...... ±
80
µ
V/°C max (RTI)
Nonlinearity
........................................... ±
0.004% of full scale
Common-mode rejection ratio ............... 60 dB min (DC to 60 Hz)
1
Temperature range is 23 °C
±
5 °C.
2
Calculated with respect to the input range
