| Products > Test Equipment |
| HIOKI 3522 LCR Meter teardown |
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| DaJMasta:
Very interesting! Those suspected MC1496Ds are actually just more DG411DYs, but there very well could be that section under the digital board in an area not pictured by these pics. I remember being a little baffled when looking over it, so it's sort of nice to hear that it uses a fairly complex measurement scheme :D I remember being real surprised to find local regulation in the form of 78XX and 79XX regulators in those larger all-plastic TO-220 style cases. I suspect they use some more modern variant with better stability and PSRR, but I hadn't really considered them as good regulator choices for high sensitivity analog sections. |
| ogden:
--- Quote from: DaJMasta on December 05, 2018, 05:55:16 pm ---Those suspected MC1496Ds are actually just more DG411DYs, --- End quote --- Two pairs of DDS+LM361 are strong hint that indeed it is IQ (sin/cos) mixer system and they use DG411DY as mixer (demodulator). --- Quote from: Michel95200 on December 05, 2018, 08:48:55 am ---Hioki 3532 seems technically closed to the 3531. --- End quote --- Could you share it's schematics? --- Quote ---Three DDS are present, one for sine/cosine generator and another one for undersampling clock generation. --- End quote --- Third DDS (ic202) looks like test signal going to Hcur. [edit] I don't know how legit that seller and his offer is, but look at those piles of LCR meters! |
| hoangduongo:
Hello, It might not be totally related. but does anyone here have the schematic of the Hioki 9268/9269 DC bias modules that go with the 3522 LCR meter? At the very least, the basic principle and feasible working plan will also be much appreciated, as I am fancy to imitate one for my 3522. Thanks a lot! Duong |
| coromonadalix:
you have Hioki 3522 on Ebay Even low as 4xx$ usd dollars for parts This seller has many of them ?? https://www.ebay.com/itm/Used-Hioki-HIOKI-3522-50LCR-1Pcs/173558354050?hash=item2868e25082:g:0QQAAOSwtM1brCao |
| hoangduongo:
Coromonadalix, I don't think I fully understand your question. I already have the 3522 meter (purchased from a local factory liquidation), now I'm looking to copy/build the DC bias modules (like the 9268/9269), as the ones appear on ebay are even more expensive than what I paid for my 3522. Thanks, Duong |
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