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SparkChaser
Premium
join:2000-06-06
Downingtown, PA
kudos:4
Reviews:
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1 recommendation

reply to TherapyChick

Re: [Electrical] Multimeter question

Nope

308,000
115,000
252,000

Also best to keep the probes the same distance apart for all samples.

Nice to see another science project besides me.

Edit: another thing to try is distilled water.


robbin
Premium,MVM
join:2000-09-21
Leander, TX
kudos:1

1 recommendation

said by SparkChaser:

Edit: another thing to try is distilled water.

Then it would be interesting to add salt in various quantities.

TherapyChick

join:2003-09-19
Fayetteville, NC
reply to SparkChaser
said by SparkChaser:

Nope

308,000
115,000
252,000

OK thanks, so another probably stupid question.

So I know that 0 (zero) means no resistance, like what you get if you simply touch the leads together or test metal or something with pretty much "perfect" conductivity property. And a 1 (one) means that it's full resistance like what you get with the leads touching nothing or putting them on plastic or wood for example.

So I would have thought that everything else would be a number BETWEEN 0 and 1, so I don't understand what the big numbers mean really.

Or am I wrong about the 0 and 1 understanding?
--
Therapy Chicks

robbin
Premium,MVM
join:2000-09-21
Leander, TX
kudos:1
said by TherapyChick:

So I know that 0 (zero) means no resistance

Actually I believe the scale is 0 ohms to infinity. The more ohms, the more resistance to conductivity.


tschmidt
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join:2000-11-12
Milford, NH
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reply to TherapyChick
Not exactly resistance goes from 0 (nothing) the infinity. Not sure about that meter but most have some way to indicate resistance higher then they can read (typical the word Over, OL or perhaps flashing display). There is no such thing as "full resistance."

It would be fun to get a variable resistor (perhaps Radio Shack or salvage it out of an old piece of equipment) and watch the display change are you turn the shaft.

/tom


pike
Premium,MVM
join:2001-02-01
Washington, DC
kudos:3
reply to TherapyChick
The 1 by itself is the meter's way of telling you the reading is out of range. Select a larger range or, if already set at the highest, you probably have an open circuit.


Thespis
I'm not an actor, but I play one on TV.
Premium
join:2004-08-03
Keller, TX
reply to robbin
said by robbin:

said by SparkChaser:

Edit: another thing to try is distilled water.

Then it would be interesting to add salt in various quantities.

My tech theatre classes have built small, battery powered salt water dimmers in the past. Fun project!
--
Fast. Cheap. Safe.
Pick two...


SparkChaser
Premium
join:2000-06-06
Downingtown, PA
kudos:4
Yes, it is fun. People don't believe that ultra pure water is about 18Megs.cm resistance. That's a way to measure purity. It also fluoresces.


John Galt
Forward, March
Premium
join:2004-09-30
Happy Camp
kudos:8

1 recommendation

said by SparkChaser:

Yes, it is fun. People don't believe that ultra pure water is about 18Megs.cm resistance. That's a way to measure purity. It also fluoresces.

I used to run and maintain the DI water plant at SLAC. One of the things they told you was to not drink the water on a regular basis.

This DI water plant supplies the water that cools the INSIDE of the power conductors feeding the magnets and the klystrons. You had to make sure that you had your plumbing fittings connected to your conductors before you landed the terminations, and your differential pressure switch monitoring the water in your wires before energizing the load.
--
Many believe, but few will question...I decline to be blind.


robbin
Premium,MVM
join:2000-09-21
Leander, TX
kudos:1
said by John Galt:

your differential pressure switch monitoring the water in your wires

If anything should be called Hydro, that would be it!