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| How to calibrate Siglent SPD1000X / SPD3303X / SPD3303X-E series power supplies? |
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| Bad_Driver:
The SDM3055X behaves as expected! Very constant readings, in slow mode 5 Hz, in fast mode about 72 Hz! So I'm pretty happy to spend 800 € for the SDM3065X with very weird and crappy acquisition behavior. :palm: |O I try to compare your readings with the SDM3065 for the SDM threat, hope that Siglent takes care of this issue (Tautech where are you??). I did a FFT with your slow readings, I assume this is not the SPD3303X??? (X = frequency/Hz) |
| oz2cpu:
>I did a FFT with your slow readings, I assume this is not the SPD3303X??? (X = frequency/Hz) nope it is the oldie Oltronix_stabpac_mca_5-3 the most stable voltage i got :-) I can make a slow-mode file SPD3303X tomorrow, just booted it up I let the voltmeter stay on, all night too, this way they will be as stable as possible, how long file do you think I need to record ? only slow ? or also the other modes ? |
| Bad_Driver:
Plz try to make a file with 4096 readings. This is the limit for EXCEL FFT. |
| oz2cpu:
so this is the plan, agree ? DC source : Siglent SPD3303X set for 5.000 no load, been powered on for 24hrs at least. slow 4096 points needed, 4096/5 = 819 sec, 13,6 mins medium 4096 points needed, 4096/50 = 82 sec, 1,36 mins fast 4096 points needed, 4096/92 = 44 sec, 0.74 mins i add atleast a few secs, so we are sure you get over 4096, maybe it is a good idea to take double the length, and perform the test two times ? see if results align ? PS: how do i get the excel fft ? please email it to me, my email is my user name at gmail so that is easy to remember :-) note : i have a hard time importing this CSV format, my excel dont accept the format. |
| Bad_Driver:
Follow this advice to get exact 4096 readings to usb. For best resolution 2 volts DC I think. https://siglentna.com/operating-tip/sample-and-store-sdm3000/ For FFT I send you the information via mail tomorrow. Edit: Please adopt the advice so, that datas are written direct to USB-disk, internal recordings will not have any time stamp. :-// Very old failure (I can‘t beliefe that this shall be a feature) in the firmware. |
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