Need help about Mastech M-830B multimeter

• Need help about Mastech M-830B multimeter
  Posted by Stinger on 02 Apr, 2017 20:17
• Hello friends,
  
  My 20 yo Mastech M-830B multimeter work fine.
  
  But i need your help. Resistor appear burned (infinite resistance).
  
  What is value please ?
  
  I read colors (a bit burned) : Black (or brown?) / White / White (not sure) / Silver (or grey?) / Green
  
  I think same resistor like multimeter in attachment.
  
  Thanks !
  
  

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• #1 Reply
  Posted by retiredcaps on 02 Apr, 2017 20:55
• If black white gray silver green, that is 0.98 ohms.  I would say a 1 ohm resistor would be good enough.
  
  BTW, there are lots of 830 meter schematics on the Internet.
• #2 Reply
  Posted by Stinger on 08 Apr, 2017 13:56
• Hello,
  Thanks for answer. My local dealer didn't have 0,99 ohm like M-830B diagram. He sell me 1 ohm resistor.
   
• #3 Reply
  Posted by Nusa on 08 Apr, 2017 14:30
• I read that unburned one as Black-White-White-Gold-Green. Which would be 099 * 0.1 +/- 0.5%, or a 9.9 ohm precision resistor.
• #4 Reply
  Posted by amyk on 08 Apr, 2017 15:22
• 99 makes sense --- it's part of the range divider. Anything else will affect the accuracy.
• #5 Reply
  Posted by retiredcaps on 08 Apr, 2017 21:47
• Quote from: Nusa on 08 Apr, 2017 14:30

  I read that unburned one as Black-White-White-Gold-Green. Which would be 099 * 0.1 +/- 0.5%, or a 9.9 ohm precision resistor.
  

  Which is why I hate the color code system for resistors.  After time or depending on the paint quality, it is difficult to tell some colors from others.  Also, lighting, photo quality, etc all factor in.
• #6 Reply
  Posted by Stinger on 15 Apr, 2017 20:55
• Thanks guys. 
  
  

  Quote from: Nusa on 08 Apr, 2017 14:30

  I read that unburned one as Black-White-White-Gold-Green. Which would be 099 * 0.1 +/- 0.5%, or a 9.9 ohm precision resistor.
  

  My burned as Black-White-White-Silver-Green.
  
  099 * 0.01 +/- 0.5%, or a 0.99 ohm ?