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National Instruments Corporation
9
SCXI-1322 Installation Guide
Installation
To connect the terminal block to the SCXI module front connector, perform
the following steps:
1.
Connect the module front connector to its mating connector on the
terminal block.
2.
Tighten the top and bottom thumbscrews on the back of the terminal
block to hold it securely in place.
Note
For accurate cold-junction compensation, place the SCXI chassis away from an
extreme temperature differential.
Cleaning the Terminal Block
Clean the terminal block by brushing off light dust with a soft, nonmetallic
brush. Remove other contaminants with deionized water and a stiff
nonmetallic brush. The unit must be completely dry and free from
contaminants before returning to service.
Specifications
All specifications are typical at 25 °C unless otherwise specified.
Cold-junction sensor
Accuracy
1
........................................ 0.65° from 15 to 35 °C
0.85° from 0 to 15 °C and
35 to 55 °C
Repeatability ................................... 0.4° from 15 to 35 °C
Output ............................................. 1.91 to 0.58 V from 0 to 55 °C
Common-mode isolation
Terminal to terminal ....................... 250 V
rms
Terminal to earth............................. 480 V
rms
1
The temperature sensor accuracy includes tolerances in all component values, effects caused by temperature, loading,
self-heating, and temperature gradients.
Summary of Contents for SCXI-1322
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