National Instruments NI USB-9219 - Manual (Page 18)

NI USB-9219 User Guide and Specifications 18 ni.com
Overvoltage protection
Terminals 1 and 2 ............................±30 V
Terminals 3 through 6,
across any combination ...................±60 V
Input impedance
Voltage and Digital In modes
(±60 V, ±15 V, ±4 V) ......................1 M
Ω
Current mode ...................................< 40
Ω
All other modes ...............................>1 G Ω
Accuracy
Cold-junction compensation
sensor accuracy.......................................±1°C typ
Mode, Range
Gain Error
(% of Reading) †
Offset Error
(ppm of Range) †
Voltage, ± 60 V ±0.3, ±0.4 ±20, ±50
Voltage, ± 15 V ±0.3, ±0.4 ±60, ±180
Voltage, ± 4 V ±0.3, ±0.4 ±240, ±720
Voltage, ± 1 V ±0.1, ±0.18 ±15, ±45
Voltage/Thermocouple, ± 125 mV ±0.1, ±0.18 ±120, ±360
Current, ± 25 mA ±0.1, ±0.6 ±30, ±100
4-Wire and 2-Wire * Resistance, 10 k
Ω
±0.1, ±0.5 ±120, ±320
4-Wire and 2-Wire * Resistance, 1 k
Ω
±0.1, ±0.5 ±1,200, ±3,200
4-Wire and 3-Wire RTD, Pt 1,000 ±0.1, ±0.5 ±240, ±640
4-Wire and 3-Wire RTD, Pt 100 ±0.1, ±0.5 ±2,400, ±6,400
Quarter-Bridge, 350
Ω
±0.1, ±0.5 ±2,400, ±6,400
Quarter-Bridge, 120
Ω
±0.1, ±0.5 ±2,400, ±6,400
Half-Bridge, ± 500 mV/V ±0.03, ±0.07 ±300, ±450
Full-Bridge, ± 62.5 mV/V ±0.03, ±0.08 ±300, ±1,000
Full-Bridge, ± 7.8 mV/V ±0.03, ±0.08 ±2,200, ±8,000
* 2-Wire Resistance mode accuracy depends on the lead wire resistance. This table assumes 0 Ω of lead wire resistance.
† Typ (25 °C, ±5 °C), Max (–40 to 70 °C)