Pete:
Does the SawStop operate by sensing leakage current through the human finger to
ground, or does it sense the human body’s capacitance (like those touch sensors
that control small table lamps)?
Also, I read their literature, but I didn’t see any mention of false-positive
actions. Is
Don, et al,My presentation ‘Physical body parameter calculations
based upon electrical measurement’ given at the 2008 ISPCE is available (search
the web). This paper develops the complex variable analysis (phasor analysis
to EE’s) for the usual human body model then works backwards
Pete,
Glad to see your thoughts agree with mine. With large amplitude
voltage pulses there must be some EMC considerations that come into play
for equipment EMC compliance.
I really wish that some alternative abbreviation had been created
instead of ES. Many engineers would be looking
I had written a paper, “Human Body Impedance Model at Radio Frequencies” for
the 2016 IEEE Symposium for Product Compliance Engineering. This paper is on
IEEE Xplore.
Abstract— This paper examines the frequency response of human body-simulating
impedance networks found in information and
The standard body models used in the safety standards to provide electric shock
protection provide for a ‘ combo in-and out RC skin impedance’ and a ‘body
resistance’. The modeled circuit used in 60990 for large area of contact is
skin impedance of 1500 ohms and 0.22uf and the internal body
It depends on what happens to the product. If it leaves the laboratory,
such as to go to an exhibition, then all the requirements apply, in
principle, but there are concessions in some countries on EMC but
obviously not on safety. If the product stays in 'technical areas' and
the radiated and
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