Products > Test Equipment

Hacking the Siglent SDM3055 Bench DMM

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alexvg:
It's possible to have more range, but I need to do a noise measurement (FFT analysis of the ADC running at 5KHz).
It's also possible to easily replace the used ADC with a better one (like the AD7175-2 used in SDM3065X with some additionnal electronic).
The SDM3055 board is more interresting than the SDM3045 and SDM3065, modifications are easy but available space inside is very limited.

alexvg:
This is just a first test for the new interface

tautech:
Puke green ?  :scared:  :-DD

Otherwise nice improvements.  :-+

e0ne199:
dang you should use your ability to hack 121GW instead of this DMM...

alexvg:
I'm currently writing the software using a Windows emulation to have an easier development.

I'm thinking about 2 hardware mods :
1. pre-regulated power supply (I already have components but haven't got time to assemble them)
2. remove ADC and ref and add an additionnal board with a better reference (LTZ1000A) and a better converter (AD7175-2 or AD7177-2)
But i don't know if the pcb and current components provide a noise floor enough lower to enable a good enhancement.

I haven't got the tools to measure the 0.1-10Hz noise at very low level.

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