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

Thermo

electrical

coefficient

J

377 Оhm

52,3

T

308 Оhm

42,8

K

293 Оhm

40,8

S

45,8 Оhm

6,4

Adjustment: compensation of sensor and

resistor tolerances

1 Selection of 1N4568

2 Adjustment of voltage drop on element R3

by the resistor R1 to obtain the value of

thermoelectrical coefficient, multiplied by the

ambient temperature (in K degrees).

3 Selection of IL235Z and adjustment of R2 for

setting voltage drop on the element R3

according to thermocouple type

J – 14,32 mV

K – 11,17 mV

T – 11,79 mV

S – 1,768 mV

Figure 22 – Circuit of cold junction compensation (compensation for ground thermocouple)

*Value of R3 nominal for this thermocouple type