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EF: loop impedance, temperature, cable factor....

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EF: loop impedance, temperature, cable factor....

G

Gary Tollison

loop impedance, temperature, cable factor....

Hello
I'm not sure if this is the correct forum area to post this in, apologies if it isn't...

I've been working through some mock questions on-line, and found myself confused by this:

The measured value of loop impedance for a circuit is 0.83ohm.
If the temperature at the time of the test was 20C, and the cable is 70C (factor 1.2) what is the corrected value. Ze = 0.4ohm:
a) 0.43 ohm
b) 0.86 ohm
c) 0.996 ohm
d) 0.916 ohm

I just cant get my head around this!

Any help would be great!

Thanks in advance,

Gary

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