Single Power Supply Cold Junction Compensation

DS005698-11

*Select R3 and R4 for thermocouple type

THERMO-

R3

R4

SEEBECK

COUPLE

COEFFICIENT

J

1.05K

385

Ω

52.3 µV/˚C

T

856

Ω

315

Ω

42.8 µV/˚C

K

816

Ω

300

Ω

40.8 µV/˚C

S

128

Ω

46.3

Ω

6.4 µV/˚C

Adjustments:

1. Adjust R1 for the voltage across R3 equal to the Seebeck Coefficient times ambient temperature in degrees Kelvin.

2. Adjust R2 for voltage across R4 corresponding to thermocouple

J

14.32 mV

T

11.79 mV

K

11.17 mV

S

1.768 mV

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