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Can I salvage my GB Instruments multimeter?
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meth...@gmail.com
Dec 30, 2005, 8:19:10 PM12/30/05
to
I was playing with the wonders of transformers in series and somehow
fragged my multimeter (sure, the voltage was like 1000V, but at like
.0000001A :( ) and anyways, now I get a steady 4.5V AC for my main wall
(normally about 121V if my memory serves me) current and .05V DC for
fully charged NiMH AA's (normally around 1.65V). Is it possible my
multimeter's voltage sensor has been reprogrammed by the high voltage
to a factor of about 26? Can this be remedied without trashing my
precious multimeter?
fragged my multimeter (sure, the voltage was like 1000V, but at like
.0000001A :( ) and anyways, now I get a steady 4.5V AC for my main wall
(normally about 121V if my memory serves me) current and .05V DC for
fully charged NiMH AA's (normally around 1.65V). Is it possible my
multimeter's voltage sensor has been reprogrammed by the high voltage
to a factor of about 26? Can this be remedied without trashing my
precious multimeter?
GB Instruments GDT-11 multimeter. $20 at Wal-mart.
-Andrew
James Sweet
Dec 30, 2005, 8:30:24 PM12/30/05
to
Unless you just want a challenge, buy a new one, it's not worth much
effort for such a cheap meter.
I'd start by checking resistors in the input section, that's about all
you have much hope of fixing.
Message has been deleted
Andy
Jan 1, 2006, 6:42:01 AM1/1/06
to
Most recent cheap digital ones have the main chip bonded to the PCB with a
plastic blob over it , and can only be repaired by replacing the whole
PCB. You would never be able to get one ,and therefore would be uneconomic.
Earlier models used the famous 7106 A to D chip which can either be
unplugged ,or unsoldered from the PCB ,and replaced for about £5 British
Pounds
"Ross Herbert" <rher...@bigpond.net.au> wrote in message
news:8asbr1dbiduvmmsb6...@4ax.com...
> On Sat, 31 Dec 2005 01:30:24 GMT, James Sweet <james...@hotmail.com>
> wrote:
>
>>meth...@gmail.com wrote:
>>> I was playing with the wonders of transformers in series and somehow
>>> fragged my multimeter (sure, the voltage was like 1000V, but at like
>>> .0000001A :( ) and anyways, now I get a steady 4.5V AC for my main wall
>>> (normally about 121V if my memory serves me) current and .05V DC for
>>> fully charged NiMH AA's (normally around 1.65V). Is it possible my
>>> multimeter's voltage sensor has been reprogrammed by the high voltage
>>> to a factor of about 26? Can this be remedied without trashing my
>>> precious multimeter?
>>>
>>> GB Instruments GDT-11 multimeter. $20 at Wal-mart.
>>>
>>> -Andrew
>>>
>>
>>
>>Unless you just want a challenge, buy a new one, it's not worth much
>>effort for such a cheap meter.
>>
>
> Good advice. The GDT-11 is even cheaper than USD20 here
> http://www.electricsupplyonline.com/prod/gb-meters_and_testers/gdt-11_w018009.php
plastic blob over it , and can only be repaired by replacing the whole
PCB. You would never be able to get one ,and therefore would be uneconomic.
Earlier models used the famous 7106 A to D chip which can either be
unplugged ,or unsoldered from the PCB ,and replaced for about £5 British
Pounds
"Ross Herbert" <rher...@bigpond.net.au> wrote in message
news:8asbr1dbiduvmmsb6...@4ax.com...
> On Sat, 31 Dec 2005 01:30:24 GMT, James Sweet <james...@hotmail.com>
> wrote:
>
>>meth...@gmail.com wrote:
>>> I was playing with the wonders of transformers in series and somehow
>>> fragged my multimeter (sure, the voltage was like 1000V, but at like
>>> .0000001A :( ) and anyways, now I get a steady 4.5V AC for my main wall
>>> (normally about 121V if my memory serves me) current and .05V DC for
>>> fully charged NiMH AA's (normally around 1.65V). Is it possible my
>>> multimeter's voltage sensor has been reprogrammed by the high voltage
>>> to a factor of about 26? Can this be remedied without trashing my
>>> precious multimeter?
>>>
>>> GB Instruments GDT-11 multimeter. $20 at Wal-mart.
>>>
>>> -Andrew
>>>
>>
>>
>>Unless you just want a challenge, buy a new one, it's not worth much
>>effort for such a cheap meter.
>>
>
> http://www.electricsupplyonline.com/prod/gb-meters_and_testers/gdt-11_w018009.php
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