Re: (ET) one blade not cutting well

[Klein Robert W NPRI <KleinRW Npt NUWC Navy Mil>]

That's what your doing with an ammeter which has an internal shunt to the 
meter.

Robert W. Klein II
SSGN Deputy Technical Manager AWS/AWSS
1176 Howell Street
Newport, RI 02841
Phone: 401-832-1948
Toll Free:  1-800-669-6892 Ext. 21948
FAX:  401-832-7877
e-Mail: kleinrw npt nuwc navy mil


-----Original Message-----
From: Michael S Briggs [mailto:msbriggs alberti unh edu] 
Sent: Wednesday, July 26, 2006 1:04 PM
To: Klein Robert W NPRI
Cc: 'steves'; Elec-trak cosmos phy tufts edu
Subject: Re: (ET) one blade not cutting well



Why not just put an ammeter in series? How much current do these mower 
deck motors normally pull? As long as it's <10A, I have some nice 
multimeters that can measure currents up that high. I can just pop the 
lid, disconnect the leads, and put the multimeter (in ammeter mode) in 
series with the motor.
        Or is the current >10A normally?

Thanks,
Mike

-- 

--------------------------------------------------------------
Michael S. Briggs
UNH Physics Department
(603) 862-2828
---------------------------------------------------------------

On Wed, 26 Jul 2006, Klein Robert W NPRI wrote:

> You could also remove the top caps from the mower motors and install a 
> shunt on one leg, reading with a generic VOM Meter.
>
> Robert W. Klein II
> SSGN Deputy Technical Manager AWS/AWSS
> 1176 Howell Street
> Newport, RI 02841
> Phone: 401-832-1948
> Toll Free:  1-800-669-6892 Ext. 21948
> FAX:  401-832-7877
> e-Mail: kleinrw npt nuwc navy mil
>
>
> -----Original Message-----
> From: elec-trak-bounces cosmos phy tufts edu 
> [mailto:elec-trak-bounces cosmos phy tufts edu] On Behalf Of steves
> Sent: Tuesday, July 25, 2006 6:43 PM
> To: Elec-trak cosmos phy tufts edu
> Subject: Re: (ET) one blade not cutting well
>
>
> Most clamp-on meters are AC, but they make AC/DC clamp-ons too. They 
> use a hall effect probe and are very accurate though you need to set 
> the zero periodically (like old-time ohmmeters). They are also 
> considerably more expensive than AC only meters - $80+ (even on ebay). 
> But very handy....
>
> _ SteveS
>
>
> David C Robie wrote:
>
>> How the heck are you gonna get a clamp on meter to read DC?    I have an
>> old fashioned handheld  'generator and starter'  tester that reads 
>> the magnetic field through a DC wire, but it is not accurate. 
>> couldn't discern less than 5a or so difference.
>>
>> Dave
>> Weymouth MA
>>
>>
>>
>>
>
>
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