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temperature Sensor error Resistor Pt1000

Felix Hoxha

Sep 26, 2016
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I want to simulate the error resistor of a temperature sensor either Pt1000 or YSi400 and I am getting stuck at the point of how should I define this Resistor in LTspice. The value of the error Resistor is like in the flow diagram calculated and question is how can I set an error Resistor that changes value with the change of temperature. I want two different values of the error Resistor one for 40°C and one for 1°C.

If the question of what an Error Resistor can be is that I am trying to simulate the problem when we have a leak contact of the conectors or cables and the temperature will be some grade Celcius more than it really is.

I hope you understand the question and have an asnwer for me.

kind regards

Felix
 

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Harald Kapp

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Is this any help?

I want two different values of the error Resistor one for 40°C and one for 1°C.
What about temperatures other than 1 ° and 40 °? The flow diagram does not reveal the temperature dependence of Rerror.

You can model non-linear behavior too, e.g. like this:
.PARAM Rrtd=if((temp+0.5),100,1000) //resistance drop from 100Ω to 1kΩ at t= 0 °C
 
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