Oh, yeah, about the line interface for measurement...
I hooked up a 47k resistor from line to the 50 ohm input of my 5334B and it
"just worked." I am watching the 60 Hz drift all around as I type this
(although not all that far, seems to be holding within 0.01 Hz tonight).
On 11/28/2011 10:42 PM, J. Forster wrote:
Recently, I took an old disposable 35mm film camera appart. It had a
flash, powered by a 1.5 V carbon-zinc AA battery. Inadvertantly, I got
across the terminals of the flash capacitor and got a hell of a shock.
Had the current gone through the right (wrong?) place, I could well be dead.
-John
===============
Every time I follow a school bus that stops at a railroad crossing and
opens its doors to stop, look, and listen - even though there is no
sign with crossed bars saying "Stop, Look, and Listen" and there are
many flashing red lights when a train approaches - I think of politicians
who would not put their name to a bill that compromised children's safety,
in any way real or imagined.
Lawyers are responsible for the death of common sense in the USA.
Trial lawyers, that is.
Now, a 9 volt battery has a few centimeters between terminals, if that.
It is commonly accepted that electrocution needs a path through the heart
to succeed, as well as many milliamps. GFCI outlets trip at about 5 mA.
Pain begins at 10 mA. You would be hard pressed to get those currents
anywhere on the human body, never mind through the heart, with 9 VDC.
There is a reason why someone using a defibrillator shouts, "Clear."
There was a time, before the internet, when most people were ashamed to
venture opinions on things they didn't know about, so they stayed quiet.
The anonymity of the Internet has made it possible for people to share
their ignorance with no shame, and we are poorer for it.
Notice the obligatory use of the word "time" in the above paragraph.
In the words of another organization for another reason, "Move on."
Bill Hawkins
OTOH, I remember being very afraid, at 6 years old, when my father
told me it was OK to touch the terminals of a car battery. I'd heard
that electricity killed, but I had no idea of the magnitudes involved.
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