[SEL] My 2 cents worth

[Ed Stoller]

I have a calibrated sensor ( A3516LUA) made by  Allegro Micro Systems and 
distributed by Newark, I think I special ordered it. It has been a while; 
the Calibration table is dated 1997. It is too early to know if I am going 
to Portland, Ind, but it would be easy to bring.

I am not satisfied with the 9 Volt battery source as I have to check to see 
if the battery is going dead. I would like to use a 12 Volt battery and 
Zener diode to substitute for it.

Ed Stoller
New Fairfield, CT
http://home.earthlink.net/~edstoller/
----- Original Message ----- 
From: "Elden DuRand" <edurand at mchsi.com>
To: "The SEL email discussion list" <sel at lists.stationary-engine.com>
Sent: Friday, February 19, 2010 7:14 PM
Subject: Re: [SEL] My 2 cents worth


> Ed:
>
> Do you have a source for calibrated Hall sensors?  I think my supplier, 
> Sprague, is out of the business.  I'd like to have a source to post on my 
> site.
>
> Take care - Elden
> http://www.oldengine.org/members/durand
>
>> -----Original Message-----
>> From: sel-bounces at lists.stationary-engine.com
>> [mailto:sel-bounces at lists.stationary-engine.com]On
>>  Behalf Of Ed Stoller
>> Sent: Friday, February 19, 2010 04:23 PM
>> To: The SEL email discussion list
>> Subject: Re: [SEL] My 2 cents worth
>>
>>
>> I am a little late here, just back from a trip.
>>
>> The kits ( about 15 of them) I distributed look
>> like those in the earlier
>> link, http://www.coolmagnetman.com/magmeter.htm ,
>> but made with a PC board.
>> I do have a bag of some less sensitive sensors as
>> I found the ones we used
>> too sensitive. The most recent use of mine was
>> for mapping the ignition
>> trigger magnets on an Onan engine.
>>
>> The original idea of measuring magneto magnets
>> was a bust as those charging
>> the magnets would stick them to an iron beam,
>> pull them off and know if the
>> magnet was charged or not. I think we might look
>> at the idea of measuring
>> the magnetism of the magnets when still installed
>> in a magneto so we would
>> not have to disturb the magnets that were good.
>>
>> Ed Stoller
>> New Fairfield, CT
>> http://home.earthlink.net/~edstoller/
>>
>>
>> ----- Original Message ----- 
>> From: "William Young" <wmlyoung at yahoo.com>
>> To: "The SEL email discussion list"
>> <sel at lists.stationary-engine.com>
>> Sent: Wednesday, February 10, 2010 9:51 AM
>> Subject: Re: [SEL] My 2 cents worth
>>
>>
>> TO: Jacob
>> From: Bill Young
>> RE; Gauss meter & "quantifier"
>> Reply to: jacob warner jacob.warner at pdahome.com>
>> Yours of December 3, 2009, 7:49 AM TO, SEL net
>>
>>
>>
>>
>> Elden, Have you collected any data on gauss
>> measurements for different types
>> of
>> magnetos? Jacob
>>
>> Jacob-san, I quite agree with Elden's comments
>> and wish to add a couple of
>> my own.
>> (1) I wanted a gauss meter in the worst way. I
>> imagined that I had a real
>> need for one because I was doing many EKs for the
>> local lads, I could not
>> find a distributor in Japan.
>> (2) So I built my own gauss "quantifier."
>> (A) On the wall, I fashioned an EK holder.
>> (B) Just below the EK armature I mounted a hinged
>> lever arm. But before
>> mounting, I made notches every inch and numbered
>> them from 1 to 30 beginning
>> at the hinge.
>> (C) Then I made an "S" hook which
>> would connect the lever arm to armature.
>> (3) The last step was to fashion a one lb. weight
>> which could be moved away
>> from the hinge in one inch increments. Thus my
>> "quantifier" gave me an idea
>> of comparative magnetism in terms of inch pounds
>> rather than Gauss.
>> (4) Years later a Japanese engine lad found a
>> company in Tokyo that sold
>> Gauss meters -- not cheap. I was so happy with my
>> purchase; I gaussed
>> everything. It was then that I became
>> disillusioned. Put the probe on any
>> spot of any magnet; note the reading. Now, move
>> the probe a quarter inch in
>> any direction. Guess what? Different reading.
>> (5) My current thinking is that my $2
>> "quantifier" was a more useful tool
>> than the expensive meter. I was getting an
>> average reading of magnetic
>> strength rather than point to point readings.
>> Elden-san, Did you ever find your Gauss meter a
>> useful instrument?
>> My greatest satisfaction? I was the only guy on
>> the block with one. Also in
>> village and city, maybe even in the county.
>> Comments please. Bill
>>
>> ( I am in Thailand now using yahoo address:
>> wmlyoung at yahoo.com )
>>
>>
>>
>>
>>
>>
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