| Electronics > Beginners |
| Amprobe resistor identification |
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| 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 |
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