©
National Instruments Corporation
9
SCXI-1313 Installation Guide
Cold-junction sensor
Sensor type...................................... Thermistor
Accuracy
1
........................................ ±0.5 °C from 15 to 35 °C
±0.9 °C from 0 to 15 °C
and 35 to 55 °C
Repeatability ................................... ±0.2 °C from 15 to 35 °C
Output ............................................. 1.91 to 0.65 V
from 0 to 50 °C
Maximum temperature gradient
between sensor and any terminal .... ±0.4 °C (non-isothermal)
High-voltage divider
Accuracy ......................................... ±0.06% (for 100:1 setting)
Drift................................................. 15 ppm/°C
Resistance ....................................... 1 M
Ω
Attenuation ratio ............................. 100:1 or 1:1
on programmatic basis
Common-mode isolation
Channel to channel.......................... 300 V
rms
or ±300 VDC
Channel to ground........................... 300 V
rms
or ±300 VDC
Coupling.......................................... DC only
Field-wiring connectors
Screw terminals
Signal terminals ....................... 16 (8 pairs)
Functional ground terminals .... 2
Maximum wire gauge .............. 16 AWG
Terminal spacing ..................... 0.5 cm (0.2 in.) center-to-center
Dimensions of front entrance.......... 1.2 by 7.3 cm (0.47 by 2.87 in.)
Solder pads for
additional components .................... None
Safety earth-ground lugs ................. 1
Strain relief ..................................... Strain-relief bar at
terminal-block entrance
1
The temperature sensor accuracy includes tolerances in all component values, effects caused by temperature and loading, and
self-heating. Errors caused by temperature gradients between terminals and the sensor are not included in this specification.
Summary of Contents for SCXI-1313
Page 14: ......
