IL235Z

Korzhenevskogo 12, Minsk, 220064, Republic of

Belarus

Fax:

+375 (17) 278 28 22,

Phone: +375 (17) 278 07 11, 277 24 70, 277 24 61,

277 69 16

E-mail: belms@belms.belpak.minsk.by

URL: www.bms.by

Thermo-

couple

R3

R4

Тhermoelectrical

coefficient

J

1050

Оhm

365 Оhm

52,3

T

856 Оhm

315 Оhm

42,8

K

816 Оhm

300 Оhm

40,8

S

128 Оhm

46,3 Оhm

6,4

Adjustment: compensation of sensor and resistor

tolerances

1 Adjustment by the resistor R1 for obtaining voltage

drop on the element R3, equal to thermoelectrical

coefficient multiplied by the ambient temperature (in K

degrees)

2 Adjustment of the resistor R2 for obtaining some

voltage drop on the element R4 according to

thermocouple type

J – 14,32 mV

K – 11,17 mV

T – 11,79 mV

S – 1,768 mV

Figure 23 – Circuit of cold junction compensation with unipolar supply

*Value of R3 and R4 nominals for this thermocouple type