Robert,
Perhaps your take on the situation is indeed on target. I'm not sure myself if
I would use the formula in the situation that you describe.
>The original poster stated that he was trying to determine the change
of
>temperature in a connector, caused by increased resistance of its
>conductors. This clearly implies that the increased temperature must be
>due to additional resistive heating of these contacts, which in turn
>means that there MUST be sufficient current flowing in the connection
to
>cause non-negligible heating. After all, if the additional heating due
>to current flow through a more resistive contact material was, in fact,
>negligible, then the connector would not get hotter, and the OP would
>not be worrying about "change of temperature based on change of
>resistance" as he stated.
Too many variables...current is still flowing...causing heating and dynamic
resistance change...connectors have mating surfaces...which dominate the
resistance. I didn't see terms in the formula that took these factors into
account.
Another problem that I can see with this is measuring the resistance in the
first place. Most connectors have a resistance which is a fraction of an
Ohm...You would almost need a bridge or other high precision device to measure
in the first place; and even then you would mostly be measuring the resistance
of the interface, not the contacts themselves.
I never let pride stand in the way of the facts...I'm starting to lean toward
your way of thinking on this one.
Chris
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