©
National Instruments Corporation
27
NI WSN-3226 User Guide and Specifications
Resistance Accuracy*
Sensor Power
Voltage ...................................................................12 V ±10%
Current ...................................................................50 mA maximum
Protection
Short circuit proof ..........................................Indefinitely
Overvoltage protection...................................±30 V
Digital I/O
Number of channels ...............................................2
Power-on output state.............................................High impedance
DIO pin capacitance...............................................2000 pF
Digital Input
Modes (configurable per channel) .........................
24V Sinking with Power Management
Input voltage range ................................................0 to 30 VDC maximum
Range
Measurement
Conditions
Percent of
Range
(Offset
Error)
Percent of
Reading
(Gain
Error)
Typical Temperature Drift
Noise
Offset
Gain
400
Ω
Typical
(25 °C, ±5 °C)
±0.02%
(±0.08
Ω)
±0.01%
±6 m
Ω/
°C
±10 ppm
/
°C
0.005
Ω
rms
Maximum
(–40 °C to 70 °C)
±0.08%
(±0.32
Ω)
±0.2%
4000
Ω
Typical
(25 °C, ±5 °C)
±0.005%
(±0.2
Ω)
±0.01%
±13 m
Ω/
°C
±11 ppm
/
°C
0.02
Ω
rms
Maximum
(–40 °C to 70 °C)
±0.05%
(±2
Ω)
±0.15%
100 k
Ω
Typical
(25 °C, ±5 °C)
±0.005%
(±5
Ω)
±0.01%
±0.3
Ω/
°C
±18 ppm
/
°C
5
Ω
rms
Maximum
(–40 °C to 70 °C)
±0.05%
(±50
Ω)
±0.21%
*
Up to 5 m of 22 AWG copper leads, 5% lead length mismatch.
