Electronics > Beginners
Amprobe resistor identification
Captnshacky:
Here the entire pcb. Gold band was closet to the lead input or the left side of this pcb. Thanks guys
Captnshacky:
--- Quote from: retiredcaps on May 06, 2019, 07:17:29 pm ---
--- Quote from: Andy Watson on May 06, 2019, 07:05:35 pm ---1k 5%.
--- End quote ---
That would be my guess as well if the resistor is part of the input protection. Likely a fusible 1k resistor found in many higher end multimeters.
http://mrmodemhead.com/blog/fluke-87-fusible-resistor/
@Captnshacky, is that resistor open in your clamp meter?
--- End quote ---
You may be correct. I would hate to send this to Amprobe for repair for a simple resistor swap....
Captnshacky:
Does this look correct? Its a 1k 5%
https://www.mouser.com/ProductDetail/Vishay/NFR2500001001JA500?qs=%2Fha2pyFadujwYBQf3%252BFYSuuGxPDNPv1QpIGWG5vyaRjUWSvp39XiAA%3D%3D
retiredcaps:
--- Quote from: Captnshacky on May 07, 2019, 11:44:33 pm ---Does this look correct? Its a 1k 5%
https://www.mouser.com/ProductDetail/Vishay/NFR2500001001JA500?qs=%2Fha2pyFadujwYBQf3%252BFYSuuGxPDNPv1QpIGWG5vyaRjUWSvp39XiAA%3D%3D
--- End quote ---
The one you linked is 1/3 W. Most fusible resistors in the input protection is 1W or 2W. I suggest this one as per modemhead's blog
https://www.digikey.com/products/en?keywords=OY102KE
As a test to see if your clamp meter works, and assuming your existing resistor R2C is open (since you didn't answer me earlier), I would just put in a normal 1k resistor to test low voltage measurements like a 1.5V AA cell. If that works, then order the replacement part.
Captnshacky:
--- Quote from: retiredcaps on May 08, 2019, 06:14:42 am ---
--- Quote from: Captnshacky on May 07, 2019, 11:44:33 pm ---Does this look correct? Its a 1k 5%
https://www.mouser.com/ProductDetail/Vishay/NFR2500001001JA500?qs=%2Fha2pyFadujwYBQf3%252BFYSuuGxPDNPv1QpIGWG5vyaRjUWSvp39XiAA%3D%3D
--- End quote ---
The one you linked is 1/3 W. Most fusible resistors in the input protection is 1W or 2W. I suggest this one as per modemhead's blog
https://www.digikey.com/products/en?keywords=OY102KE
As a test to see if your clamp meter works, and assuming your existing resistor R2C is open (since you didn't answer me earlier), I would just put in a normal 1k resistor to test low voltage measurements like a 1.5V AA cell. If that works, then order the replacement part.
--- End quote ---
Will it matter that its 10% and not 5%? Thanks
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version