Author Topic: (solved) fluke 8502a Ohm 's card  (Read 1919 times)

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Offline whitevampTopic starter

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(solved) fluke 8502a Ohm 's card
« on: May 06, 2016, 03:21:48 pm »
my ohm 's card is way out so i decided to see if i could figure out why it was out, and in testing some components i found a resistor that was way low, its reading 7.75k and it should be 4.091M 2w ( R41 )
so the question is this resistor is bad right? i think it is.
and if it is bad dose any one know where i can get it, or if i can sub it for a different one, i have looked at digikey and mouser, and a few other places but i cant find this part.
« Last Edit: October 07, 2016, 06:35:23 pm by whitevamp »
 

Offline Vgkid

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Re: fluke 8502a Ohm 's card
« Reply #1 on: May 06, 2016, 03:41:37 pm »
Can you take a picture of the resistor? Did you measure it out of circuit?
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Offline Vgkid

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Re: fluke 8502a Ohm 's card
« Reply #2 on: May 06, 2016, 06:49:44 pm »
For that resistor use a 4MEG metal film in series with a 90.9K mf resistor for testing. For something more accurate(and expensive) use 2 caddock  (USF370-2.00M-0.01%-5ppm) 2 megohm resistors in series with the 90.9K resistor. I don't believe that caddock would do a one off resistor, that would be even easier. Option 1 will cost you a few bucks, option 2 will be about 70.
If you own any North Hills Electronics gear, message me. L&N Fan
 
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Offline whitevampTopic starter

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Re: fluke 8502a Ohm 's card
« Reply #3 on: May 06, 2016, 07:53:58 pm »
Can you take a picture of the resistor? Did you measure it out of circuit?
yeah was out of the board.

For that resistor use a 4MEG metal film in series with a 90.9K mf resistor for testing. For something more accurate(and expensive) use 2 caddock  (USF370-2.00M-0.01%-5ppm) 2 megohm resistors in series with the 90.9K resistor. I don't believe that caddock would do a one off resistor, that would be even easier. Option 1 will cost you a few bucks, option 2 will be about 70.

ok thank you.
 

Offline Vgkid

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Re: fluke 8502a Ohm 's card
« Reply #4 on: May 06, 2016, 08:57:32 pm »
This is a better option for precision resistors. Caddock usf-340. 22.xx at digi-key. Lower cost, and smaller size.
If you own any North Hills Electronics gear, message me. L&N Fan
 


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