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Something stupid from Haynes and a question.

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jlaird

jlaird

Great Pumpkin
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Page 172 Para 8.3

Disconnect the leads from temninals D and F on the dynamo and the join the terminals together with a short length of wire. attach to the center of this length of wire the negitive clip of a 0 to 20 volts voltmeter and the other clip to earth. Start the engine and allow it to idle at about 750 RPM. At this speed the dynamo should give a reading of about 15 bolts on the voltmeter.

But but it is not hooked up to the dynamo, how the heck could you read the output?

Should the output not be read across the two terminals on the generator with out it being hooked to any wires?
 
It make sense to me. I see the circuit. Remember the generator is grounded.
 
Jack, they are not saying attach the volt-meter to the leads, but to the terminals on the dynamo!! In other words it should read: "bridge terminals D and F on the dynamo"!
 
Ok, I admit I'm thick, what the heck do I do.

This makes no sense to me at all.
 
Jack,

Disconnect the leads (wires) from the generator. Hook a wire between the two terminals (on the generator). In the center of the wire that's between the two terminals (on the generator) place one clip from your volt meter. Connect the other clip to ground.

This will give you a voltage output reading for the generator.

Does that make sense? /bcforum/images/%%GRAEMLIN_URL%%/smile.gif
 
The big terminal is the output, positive if you have it set up for negative ground. The opposite output pole is the housing of the generator, which is, of course, grounded. So, you need to measure the voltage between the big terminal and ground.

The connection from the big output terminal to the smaller field terminal is so that the generator can power the field coils, which is necessary for the generator to develop a decent output voltage.

Hope that helps!
 
You guys should write the book, that even makes sense.

Soon as it gets a bit later in the morning I will check that.
 
I wuz wonderin' where you were, Jack! Mornin'!!

Steve 'splained it! All you need is to power the fields from the generator itself: the jumper wire. Read output from meter twixt the jumper and ground.
 
Hi Doc, yep steve made sense. Either I am getting old or stupid or Haynes was written in China. That made no sense at all.
 
mehheh... written in Engrish... /bcforum/images/%%GRAEMLIN_URL%%/wink.gif
 
jlaird said:
Hi Doc, yep steve made sense. Either I am getting old or stupid or Haynes was written in China. That made no sense at all.
Click to expand...

Maybe a little old, certainly not stupid! and probably true!! /bcforum/images/%%GRAEMLIN_URL%%/lol.gif
 
Ok, the vote is in, I'm stupid.
 
It's not just the Haynes: The Bentley manual has the same thing. And you are decidedly NOT stupid, Jack!

I think it's a difference twixt the Queen's English and American english. The resulting confusion can be frustrating to any of us. The manuals are rife with these (what we interpret as) ambiguities. Diagrams/drawings help a lot!
 
Jack, we Brits have a weird way with words, from your point of view. Among our own kind we are quite at home with it, but we sometimes fail to make ourselves understood all that well to others, particularly Americans.
Even Haynes books on American cars were originally written by Brits in the UK, go figure...

Two peoples separated by a common language...

Witness Shakespeare...

Now is the winter of our discontent
Made glorious summer by this sun of York;
And all the clouds that lour'd upon our house
In the deep bosom of the ocean buried.
Now are our brows bound with victorious wreaths;
Our bruised arms hung up for monuments;
Our stern alarums chang'd to merry meetings,
Our dreadful marches to delightful measures.
Grim-visag'd war hath smooth'd his wrinkled front,
And now, instead of mounting barbed steeds
To fright the souls of fearful adversaries,
He capers nimbly in a lady's chamber
To the lascivious pleasing of a lute.

Opening speech of Richard III
 
A wonkeyed steed, morelike. /bcforum/images/%%GRAEMLIN_URL%%/devilgrin.gif
 
Jack
DON'T let the engine rev up at all while doing this test-- the voltage (and therefore current too) could get really high in the field windings really quickly and totally destroy the generator. Be careful!
Bill
 
A bugeye, a bugeye, my kingdom for a bugeye!! /bcforum/images/%%GRAEMLIN_URL%%/jester.gif
 
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