Author Topic: Advantest R6551 Multimeter  (Read 2875 times)

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Offline radhaz

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Advantest R6551 Multimeter
« on: September 27, 2015, 11:59:09 pm »
I bought this a while back. It's a 5.5 digit DMM, pretty well made. It had an issue where it would not measure ACV or ACI. Turns out there is a separate board for measuring AC, which this unit did not have.
I found another unit for sale cheap and took a chance on it. It has the AC board, but it has a bad transformer. I swapped in the AC board and now have (inaccurate) AC readings. :-DD
Here are some pics of the beast:
 

Offline Vgkid

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Re: Advantest R6551 Multimeter
« Reply #1 on: September 28, 2015, 03:02:12 am »
That is a rather interesting meter. I do find it funny to see the 4052 with guard traces.
Gotta love the high impedance daughterboards, and the mix of smd and through hole components.
If you own any North Hills Electronics gear, message me. L&N Fan
 

Offline radhaz

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Re: Advantest R6551 Multimeter
« Reply #2 on: September 28, 2015, 03:15:59 am »
Any ideas on a poor man's AC calibrator? I just want to get AC kinda sorta close to reality.
 

Offline Vgkid

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Re: Advantest R6551 Multimeter
« Reply #3 on: September 28, 2015, 03:28:21 am »
If you own any North Hills Electronics gear, message me. L&N Fan
 

Offline lowimpedance

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Re: Advantest R6551 Multimeter
« Reply #4 on: September 28, 2015, 05:43:53 am »
Is changing the transformers over complicated?, or the cheaper unit too beat up?. Just a thought that the one with the dud transformer may actually be okay for cal. with all its 'cards'.
The odd multimeter or 2 or 3 or 4...or........can't remember !.
 

Offline radhaz

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Re: Advantest R6551 Multimeter
« Reply #5 on: September 28, 2015, 06:19:15 am »
I may try moving the trans over to the duff unit. I do have soldering gear for that.
« Last Edit: September 28, 2015, 06:23:31 am by radhaz »
 


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