Products > Test Equipment
Benchtop Power Supply with 0.05 mV step resolution?
bookaboo:
--- Quote ---Use a bench programmable supply with a 1mV resolution driving an opamp configured for a gain of 1/20 ?
--- End quote ---
Surely this is a better idea than spending a bunch on a SMU?
OP did state a power supply, but I don't think he needs a power supply to simulate a sensor, just a reference. In fact a stable voltage reference, 10 turn pot, suitable opamp and a decent meter would suffice?
exe:
Wow, 50uV is kinda challenging because of the noise and thermocouple effect.
Anyway, I'm with bookaboo. It can even be breadboarded, imho, just connect the DMM right at the load to make sure all parasitic resistances are compensated.
ninjanation217:
Thanks! I did actually look into this one prior, unfortunately the lead time is crazy.
ninjanation217:
I already use a Keithley 220 for current and it is pretty awesome. I will look into the 230
"I wouldn't mess with building my own attenuator, but rather buy a device that can directly generate the output you need."
I 100% agree, especially since my equipment must have a calibration associated with it and I don't want to deal with the headache.
ninjanation217:
You are not wrong. My main issue I run into is red tape. The company I work for wants the certified equipment for calibration/testing. Its hard to explain to someone that doesn't understand electronics that I verified the output myself with certified equipment. Its just easier to buy a calibrated piece of equipment unfortunately.
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