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temperature Sensor error Resistor Pt1000

Discussion in 'Sensors and Actuators' started by Felix Hoxha, Sep 26, 2016.

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  1. Felix Hoxha

    Felix Hoxha

    Sep 26, 2016
    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


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  2. Harald Kapp

    Harald Kapp Moderator Moderator

    Nov 17, 2011
    Is this any help?

    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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