Kippzonen COMBILOG Data Logger Manual do Utilizador descarregar pdf (Página 44)

If the temperature is measured by external cold junction com-

pensation, a second thermocouple of the same type is re-

quired, which is connected in series with the first one. The po-

larity is selected so that the thermoelectric voltages subtract

each other. The second thermocouple is set to a fixed refer-

ence temperature ϑ

(mostly ϑ

= 0°C). The data logger then

calculates the temperature at the measuring position by means

of the linearisation curve as ϑ

= Lin(U

+Lin

-1

). The data log-

ger will be informed about the reference temperature ϑ

via the

configuration software (“cold junction temperature”).

Hardware Manual COMBILOG 1022

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Kippzonen COMBILOG Data Logger Manual do Utilizador Página 44