Portable, Modular Signal Conditioning Modules
NI SCC-TC Series Thermocouple Input
Specifications
SCC-TC Series
Typical for 25 °C unless otherwise noted.
Input Characteristics
Number of channels............................ 1 differential
Input signals........................................ Thermocouples of type J, K, T, B,
E, N, R, and S, ±100 mV
Input signal gain ................................. 100
Maximum input working voltage........ ±12 V of chassis ground
Overvoltage protection
to DAQ device................................. ±42 Vpk (powered on or off)
Nonlinearity......................................... ±0.004ꢀ maximum
Gain error ............................................ ±0.08ꢀ of reading, maximum
Input impedance
Normal powered on........................ 10 MΩ
Powered off or overload................. 10 kΩ
Open thermocouple detection current 250 nA maximum
Common-mode rejection ratio............ 110 dB minimum
Bandwidth........................................... 2 Hz, dual-pole RC filter
Offset error.......................................... 5 µVrms, referred to input
Stability
Offset temperature coefficient....... ±0.± µV/°C maximum
Gain temperature coefficient ......... ±0.0005ꢀ/°C
Cold-junction sensor (thermistor)
Model
SCC-TC01
SCC-TC02
Channel
1
1
Description
Thermocouple, spade connector
Thermocouple, screw terminals
Part Number
777459-03
777459-04
The National Instruments SCC-TC01 and SCC-TC02 are single-input
modules for conditioning signals from a variety of thermocouple types,
including J, K, T, B, E, N, R, and S, and millivolt inputs with a range of
±100 mV. The NI SCC-TC modules include a 2 Hz lowpass filter, an
instrumentation amplifier with a gain of 100, and buffered outputs for
maximum scanning rates by the multifunction DAQ device. The input
circuitry of the SCC-TC modules also includes high-impedance bias
resistors for open-thermocouple detection as well as handling both
floating and ground-referenced thermocouples. The SCC-TC modules
include an onboard thermistor for cold-junction compensation.
Two versions of the SCC-TC are available. The SCC-TC01 includes a
2-prong uncompensated thermocouple jack that accepts any miniature or
subminiature 2-prong male thermocouple plug. The SCC-TC02 includes a
removable screw-terminal plug that features an additional connection for
grounding thermocouple shields.
Output ............................................. 1.91 V (at 0 °C) to 0.58 V
(at 55 °C)
Accuracy (15 to 35 °C).................... ±0.4 °C maximum
Power Requirements
Analog................................................. ±0 mW
BUY ONLINE at ni.com or CALL 800 813 3693 (U.S.)
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NI [ National Instruments ]
