National Instruments SCC-TC Series Thermocouple Input Modules Manual do Utilizador descarregar pdf (Página 15)

Cold-Junction Sensor

Cold-junction sensor accuracy ............... ±0.4 °C max from 15 to 35 °C,

±0.75 °C max from 0 to 15 °C

and 35 to 55 °C

Output..................................................... 1.91 V (0 °C) to 0.58 V (55 °C)

Note The accuracy specification includes the combined effects of the temperature sensor

accuracy and the temperature difference between the temperature sensor and any

thermocouple connector. The temperature sensor accuracy includes component tolerances,

temperature drifts, and self-heating effects. It does not include measurement device errors.

Open Thermocouple Detection

Pull-up resistor ....................................... 10 MΩ

Bias resistor............................................ 10 MΩ

Maximum field wire gauge .................... 16 AWG

Power Requirement

Analog power......................................... 60 mW max

+15 V .............................................. 2 mA max

–15 V............................................... 2 mA max

Digital power (+5 V).............................. 0.0 mW

K –200 to –100

–100 to 600

600 to 1,200

2.5

1.25

0.67

0.45

N –200 to –100

–100 to 1,300

2.5

0.7

R –50 to 0

0 to 100

100 to1,600

1.75

1.24

0.82

0.4

S –50 to 0

0 to 1,400

1,400 to 1,600

2.5

1.3

T –200 to –100

–100 to 400

2.5

0.9

Thermocouple

Type

Temperature

Range (°C)

Maximum

Inaccuracy (±°C)

Typical

Inaccuracy (±°C)

1 2 ... 10 11 12 13 14 15 16 17 18 19 20

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National Instruments SCC-TC Series Thermocouple Input Modules Manual do Utilizador Página 15

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