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Air conditioner comes on for 10 seconds or so and kicks back off again, any ideas?

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Air conditioner comes on for 10 seconds or so and kicks back off again, any ideas? Mike 08-30-2007
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Posted by dpb on August 30, 2007, 6:34 pm
Joe wrote:
>
>> snip<
>
>> 3) Compressor drawing too much current (any way to check this, I do
>> have a multimeter)
>
> You need an AC ammeter or the right adapter to handle 50 A more or
> less on your multimeter. HTH

Quite an adapter to put inline w/ a conventional multimeter... :)

In a practical sense, unless you have a clampon meter, no, there isn't
an easy way for large currents...typical VOM's are able to handle only a
few 10's of mA.

--

Radiant Heat 468x60
Posted by Jon Danniken on August 30, 2007, 7:15 pm
"dpb" wrote:
> Joe wrote:
>>
>>> snip<
>>
>>> 3) Compressor drawing too much current (any way to check this, I do
>>> have a multimeter)
>>
>> You need an AC ammeter or the right adapter to handle 50 A more or
>> less on your multimeter. HTH
>
> Quite an adapter to put inline w/ a conventional multimeter... :)

All you need is a length of wire (or a resistor) to use as a shunt, inserted
in parallel with the load.

> In a practical sense, unless you have a clampon meter, no, there isn't an
> easy way for large currents...typical VOM's are able to handle only a few
> 10's of mA.

My cheapy Harbor Freight DMM measures up to 20A AC current, but most common
meters usually only measure a few hundred mA of DC current.

Jon



Posted by dpb on August 30, 2007, 8:04 pm
Jon Danniken wrote:
> "dpb" wrote:
>> Joe wrote:
>>>
>>>> snip<
>>>> 3) Compressor drawing too much current (any way to check this, I do
>>>> have a multimeter)
>>> You need an AC ammeter or the right adapter to handle 50 A more or
>>> less on your multimeter. HTH
>> Quite an adapter to put inline w/ a conventional multimeter... :)
>
> All you need is a length of wire (or a resistor) to use as a shunt, inserted
> in parallel with the load.

Yeah, but...if needed to ask, that's not just a "just" w/ 50A...

--

Posted by Mark Lloyd on August 31, 2007, 12:59 pm

>Joe wrote:
>>
>>> snip<
>>
>>> 3) Compressor drawing too much current (any way to check this, I do
>>> have a multimeter)
>>
>> You need an AC ammeter or the right adapter to handle 50 A more or
>> less on your multimeter. HTH
>
>Quite an adapter to put inline w/ a conventional multimeter... :)
>
>In a practical sense, unless you have a clampon meter, no, there isn't
>an easy way for large currents...typical VOM's are able to handle only a
>few 10's of mA.

Some do have a 10A range (with a separate jack). I used to use that
frequently to measure the current use by 120V appliances.
--
Mark Lloyd
http://notstupid.laughingsquid.com

"God was invented by man for a reason, that
reason is no longer applicable."

Posted by David Combs on September 22, 2007, 3:34 pm
>
>>Joe wrote:
>>>
>>>> snip<
>>>
>>>> 3) Compressor drawing too much current (any way to check this, I do
>>>> have a multimeter)
>>>
>>> You need an AC ammeter or the right adapter to handle 50 A more or
>>> less on your multimeter. HTH
>>
>>Quite an adapter to put inline w/ a conventional multimeter... :)
>>
>>In a practical sense, unless you have a clampon meter, no, there isn't
>>an easy way for large currents...typical VOM's are able to handle only a
>>few 10's of mA.
>
>Some do have a 10A range (with a separate jack). I used to use that
>frequently to measure the current use by 120V appliances.
>--
>Mark Lloyd
>http://notstupid.laughingsquid.com
>
>"God was invented by man for a reason, that
>reason is no longer applicable."


Question: are the clamp-ons at all accurate, or are they
(sometimes) GROSSLY wrong?

EG I got a radio shack 2part vom that had a plug-in clamp-on
coming with it. (maybe $30 when I got it 3 or so yrs ago)

David



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