Hi, I have viewed quite some videos on this DMM and now I am ponderig for it's considerable slow speed against its so many features.
And I also do a little search for other DMM using the same hy3131: Holdpeak HP-770D, UNI-T 171 series, 121GW, AmazonCommercial 90DM860 .. Among thoes name mentioned above, UNI-T 171 series is smoking fast, while the other can place them to "Slow category".
One idea comes up to my mind. Hycon's popular DM0660 is kind of slowly too, but it can double its' speed by changing the 4 Mhz Crystal oscillator to 8Mhz when most of the function keep working1 . I wonder does this overclocking hack work for HY3131 too. If it is possible, one should change the oscillator of the hy3131 or the MCU, or both of them?
Again, it's amazing how different the speed is comparing UNI-t 171 to 121GW. I would like to have 121GW if I can hack it become faster.
Note:
1. 8Mhz DM0660's voltage, current & temp will work without any modification. Resistor and Capacity will need to tweak the eeprom, easy enough though. Frequency will show result by half, 60Hz will show 30Hz, only function that will "break", but I don't mind for the trade off speed.