Hantek LCR 1832C unlock

[Veteran68]

It would be nice if someone with the Hantek 1833c measures just for comparison the 10k resistor, and what the device will say.

I posted my 10K test results with my 1833C here. I did not capture the theta angle though.

[_Yuri]

I recently bought 1832C on Aliexpress and unlocked it for 1833C as described above.
Tested 10kOhm at different frequencies and got the same problem with theta, at 50kHz and above it increases to 20 degrees. The resistance increased, to 10.5 kOhm only.
When calibrating 50 kHz and above, it switches to fast, It seems it is not calibrated on it.
I downloaded and flashed 1833 dump (https://www.eevblog.com/forum/testgear/hantel-lcr-1832c-unlock/?action=dlattach;attach=1903665), then LCR2023041001 (https://www.eevblog .com/forum/testgear/hantel-lcr-1832c-unlock/?action=dlattach;attach=1991305).
After this, calibration takes much longer and, the resistance and theta remain correct for all frequencies when measuring a 10k ohm resistor.

Didn't touch the capacitors.

[wind999]

Dear Yuri, i haven’t tried anything yet, but this makes sense, the calibration data must be in the flash rom of the 1833c. Damm, you are a genius. A true genius.
I will try tomorrow morning.
Here is the correct link for the latest firmware https://www.eevblog.com/forum/testgear/hantel-lcr-1832c-unlock/?action=dlattach;attach=1991305
Can you just tell me how to flash 1833c dump file? Just use the DfuSe Demo software? Should I set some parameters or just start upgrade?

[hpw]

As using a "genuine" Ali Express 1833C from the given Hantek distributor

For my issue as not saving the Cap calibrations, I asked the Hantek support about:

[1] Fix or solution for this issue

[2] Whether the 2023 FW release is "genuine" and save to load


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

than absolute silence:

This means for me, Hantek is now on my BLACK LIST for any products of them as support in questions. 

Or it simple means, the LCR 183x is NOW or a DEAD unsupported product 

Just be warned about!

Hp

[wind999]

All done. Thank you Yuri.

[ru_tash]

All done. Thank you Yuri.

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

[ru_tash]

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

than absolute silence:

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.

[ru_tash]

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.

through your tables I see that measured data of resistors was changed a little, that is reasonable as you installed another device's  ROMdump which was probably calibrated to that particular unit.
so to speak, trade-off to get full functionality.
do you have precision resistors to check accuracy after all?

[wind999]

Im waiting them. These days AliExpress is very slow. Probably in April. When i get them i will post the results.

[tom55]

did any of you check capacitors and inductors at 100khz? especially small inductance like 2.2uH - i have problems with these in default fw (2021) did not upgrade or mod anything yet, the value often drifts down, a good 2.2uH showing as low as 1.8uH

update: installed 20230410AM version. it is stable now

ridiculous that they can't email it when asked or put on the website, but you have to hope somebody else got it and uploaded

[tom55]

damnit this is still not good

i check 2.2uH and 2.4uH, at 4khz it looks accurate, at 10khz values go up way too much 2.7uH and 3.1uH
at 40khz still not stable when 2.2 measured 1.93uH, 2.4 was 2.1uH
also 40khz 2.2 was 2.1uH and 2.4 was 2.24uH

4-wire with shorting calibration used. seems like only fixed instability due to some signal breaks every 20 sec as guys here noticed previously. change component being tested or up/down frequency, it acts up with result

update: when it was stable, i tried to check 68nH inductor. reading was 0.065uH so pretty close

also noticed with 2023 fw the charging is now steady and takes more than 6 hours, while with previous version the draw from wall was jumping up an down all the time.
remains to see if the battery will last any longer

[ru_tash]

update: when it was stable, i tried to check 68nH inductor. reading was 0.065uH so pretty close

one thing I noticed - the calibration state depend on how "good you powered it on", that is when I powered on with metal jumper inserted and L measured mode, some times it is not zero, I need series on-off cycles to get zero readings.
it looks like that calibration data stored in memory but to activate it you need to power on with random positive effect.
so, instead of every time (after power on) to do calibration I do on-off cycles until get zero readings.
 
 

[nycn]

upgraded 1832 to 1833 using wind999 method, everything seems working flowlessly. Can't find information about levels, 300mv or 600mv ?  It shows slightly different values