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red dragon
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 Posted: Wed Jul 21, 2010 2:57 pm Post subject: data sheet |
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I was delighted to locate a data sheet for my MASTECH M-830b multimeter.
I have blown R5 and R18 and you had the perfect sheet to discover what values I need for replacing.
HOWEVER I was not able to read the values. I got 900 for R5 but not the units and R18 was totally unreadable.
I have sent emails to Hong Kong for values but they don't reply.
Yes I know this is a cheap meter but I like the challange!!
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jts1957
Joined: 24 Nov 2008
Posts: 2476
Location: Far, Far Away
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| Posted: Wed Jul 21, 2010 4:57 pm Post subject: |
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Well for the resistor chain that includes R5, starting at top, 90K then comes 9K, then comes R5, then comes 100 ohm - logic dictates that R5 units should be ohms (900 ohms).
R18 indicates 2K2W (2.2K ohm)
A number of service manual copies (one erroneously indicates it is for a DVD):
http://elektrotanya.com/?q=showresult&megnev=&megnev2=M-830b&kategoria=&kat2=all
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