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Hantek LCR 1832C unlock

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ru_tash:

--- Quote from: wind999 on March 02, 2024, 11:22:25 am ---All done. Thank you Yuri.

--- End quote ---
can you share details how did you do it?
and what is the result, complete 1833 or partial?

ru_tash:

--- Quote from: hpw on March 02, 2024, 09:44:19 am ---

As for [1], a lady form Hantek asked back about the used ambient temperature  :phew:

than absolute silence:


--- End quote ---

same in my case, lady Tina Chen suggested me to calibrate device and send video, and no her answer from my reply anymore.

wind999:
I’ll be glad to elaborate on the results. So, i used the same resistors as in my previous data analysis. But now it is obvious that frequencies 50-100kHz ARE calibrated. I’ll more than happy is someone has original Hantek1833c to make the measurements just for comparison. The measurments for the 1M and 100K for High freq (50-100kHz) are made using paralle mode. The rest of the parametres are Slow Speed and 600mV Level. Of course, there is a drift toward inductivity with high frequency 100kHz is used to measure lower resistors value, and capacitance when measuring with high frequency 100kHz and high resistor values. However, the trend it is obvious for single value as you increase the freq, there is no huge jump in measurement as everyone can see in the previous ROM. I think the best measurements can be made around 5K, in which theta angle will be almost 0 through all frequencies.

How this is done?? Very simple, Thanks to Yuri. So, basically I entered DFU mode, and from there I made a copy of the current firmware, just for any case. After that I flash(upgrade) the device with the file.dfu (Hantek1833_DUMP). After successfully finish I started LCR meter in normal mode, and I immediately noticed that the model is 1833C, no SCPI commands are needed in DEBUG mode.
After this, I again started the LCR meter in DFU mode and now I flash with LCR2023041001.dfu.Lateest version of the ROM. After this, leave the DFU mode, restart and you have HANTEK 1833c in your hands.

The starrting point was. Hantek1832c with upgraded ROM - LCR2023041001.dfu.


I like to thank all the people who contributed to achieve this. As Isaac Newton said “If I have seen further, it is by standing on the shoulders of giants”

ru_tash:
you have LCR2021061501 version and 1832 model before flashing 1833dump, right?
but I have already upgraded to LCR2023041001, so I should downgrade before flash 1833dump?
the question now is downgrade possible and safe?

wind999:
NO. Before the upgrade, i have installed LCR2023041001, too. That's why i made just in case backup of the ROM.Luckily i don't need any more.
So, you can go directly to 1833cDump and then you can upgrade again with LCR2023041001.
Downgrade is possible because you are changing the entire ROM 512KB with the dump. I think there is no safety switch or R/W block something like that in the software or in the hardware level.

MOST important, DO NOT change the RC C66-C69 Capacitors as Yuri said.

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