Appendix A Specifications
SCXI-1121 User Manual A-4 www.natinst.com
Note You can find the temperature T (°C) as follows:
T = TK – 273.15
where TK is the temperature in kelvin
a = 1.288 x 10–3
b = 2.356 x 10–4
c = 9.556 x 10–8
RT = resistance of the thermistor in Ω
VTEMPOUT = output voltage of the temperature sensor
Physical
Dimensions.............................................1.2 by 6.8 by 8.0 in.
Connectors..............................................50-pin male ribbon-cable rear
connector
32-pin DIN C front connector
(18-screw terminal adapter
available)
Environment
Operating Temperature ..........................0 to 50 °C
Storage Temperature...............................–20 to 70 °C
Relative humidity...................................10% to 90% noncondensing
Safety
Designed in accordance with IEC61010-1, UL 3111-1, and CAN/CSA
C22.2 No. 1010.1 for electrical measuring and test equipment. Approved at
altitudes up to 2000 meters; Installation Category II; Pollution Degree 2.
TK1
ab R
T
ln()cR
T
ln()
3
++[]
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RT50000 VTEMPOUT
2.5 VTEMPOUT
–
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