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r1 + r2 by taking away ze from zs

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my post also. just wondering if that was one of the reasons it took me so long, i can't do more than 2 small dometic PIrs in a day.
 
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telectrix said:
but is it necessary on a PIR to measure R1+R2, as the circuit has already been verified when installed and energised. measurement of Zs, when compared to previous readings should confirm that the R1+R2 is satisfactory.
Click to expand...

Good point
Figure of 8 and bridged rings and polarity of sockets
Anyone want to comment on guidance note 3
3.10.2

:)
 
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