Author Topic: Hantek LCR 1832C unlock  (Read 8171 times)

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Offline hpw

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Re: Hantek LCR 1832C unlock
« Reply #50 on: June 24, 2021, 11:02:40 am »
I realized this when measuring an accurate resistor of 10,000kΩ, at a frequency of 100kHz it showed 30kΩ. After removing 4 capacitors and calibrating, it began to show 10,000 kΩ at all frequencies. To memorize the calibration results, press the SET button 3 times and after turning on the device, the calibration settings are saved

Just need an 1833 owner to confirm theses capacitors / resistors values

Will test the calibration overwriting procedure. I ordered various ALI 4 pol and for SMD only the crocodile made enugh pressure for good contacts otherwise fishing into dark...

Even SMD coils an 100kHz was required! But not for Audio transformers as 10H ..

Tested using my original 1833c with an 1206SMD 10k resistor.... 100kHz showed may 400E lower resistor value.

Will load soon the early given 2021 FW, while still not seen on Hantek web.

 

Offline hpw

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Re: Hantek LCR 1832C unlock
« Reply #51 on: June 24, 2021, 12:51:12 pm »

So did the update procedure...

a) yeah, hold TX button while off and connect the PC, then the compare button lamp lights on

b) files are different in size as the old one (LCR2020101001.dfu = 125k, LCR2021061501.dfu = 513k)

c) after upload, it shows still as LCR2020101001, so what changed and what is different??  :-DD

d) did the calibration open and closed using 4 pol model, than 3 x SET and than ... open value shown as -------

e) tested the same SMD 1206 10K  resistor, 100Hz about 9.98K ... 100kHz about 9.977K  :-DD

Hp
 

Offline Russ3000

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Re: Hantek LCR 1832C unlock
« Reply #52 on: June 26, 2021, 08:38:47 am »
After flashing the device with a new firmware, it became 1832C again, I had to apply the Teixeluis method, everything worked out great.
But the device did not remember the calibration after turning off, I decided to try to enter the device into debug mode, while the red inscription "DEBUG" lights up on the device screen next to the battery, disconnected the device from the computer, the inscription remained, did the calibration open and closed, connected 1833C to computer, wrote the command "fact: save" and exited debug mode. Now, when you turn on the power, the device loads the calibration that I did.
Good luck!
 

Offline Russ3000

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Re: Hantek LCR 1832C unlock
« Reply #53 on: June 26, 2021, 08:45:17 am »

c) after upload, it shows still as LCR2020101001, so what changed and what is different??  :-DD


I have it flashed and shows version 20210615.
 

Offline hpw

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Re: Hantek LCR 1832C unlock
« Reply #54 on: June 26, 2021, 07:58:52 pm »

@Russ300" I have it flashed and shows version 20210615."

Now have the  same FW...

I did used the "Upload action" as will come a "Save As" dialog.... so not really "rubio" proved  :-DD

so UPGRADE or Verify action is the group box to use

Than after calibration 3x set button.

Testing the resistor did not change any thing, values as already given

Thanks

Hp
 

Offline hpw

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Re: Hantek LCR 1832C unlock
« Reply #55 on: June 26, 2021, 08:49:05 pm »

So did the the 3x SET button test, whether it holds latest calibration. Using a 4 pol kelvin smd probe

. switch on, change to Cap: 8.3pF

. switch to R and do open calibration while shorted does not influence the cap calibration

. do 3x SET button

. switch to Cap: about 0.04pF after calibration

. do 3x SET button

. switch off

. switch off

. on Cap : again 8.3pf, so calibration saving is a nightmare  |O

Hp
 

Offline Russ3000

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Re: Hantek LCR 1832C unlock
« Reply #56 on: June 27, 2021, 07:42:20 am »
How to make the device remember the calibration after turning off the power is described in my post above, for this you need the Keysight Interactive IO program.How to do it is described here
https://www.creationfactory.co/2021/03/reverse-engineering-and-unlocking.html?showComment=1622733342560#c2775361835350856538

Quote
I decided to try to enter the device into debug mode, while the red inscription "DEBUG" lights up on the device screen next to the battery, disconnected the device from the computer, the inscription remained, did the calibration open and closed, connected 1833C to computer, wrote the command "fact: save" and exited debug mode. Now, when you turn on the power, the device loads the calibration that I did.
 

Offline hpw

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Re: Hantek LCR 1832C unlock
« Reply #57 on: June 27, 2021, 05:16:48 pm »
OK,

to get the calibration save, you need to put the device in debug mode.

While installed latest Keysight bunch, using Win 10 64bit as 20H1, installed Win8 64 bit driver, things went on... USB entry seen and then no connection

So the questions:

. OS used as Win??

. using IOLibSuite_17_2_20605_2 only

. installed also the driver as VCP_V1.5.0_Setup_W8_x64_64bits.exe ??

. and before starting the LCR, put the 183xC first in DFU mode or not??

IMHO it is not very clear to me, how your working setup is

Hp
 

Offline Russ3000

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Re: Hantek LCR 1832C unlock
« Reply #58 on: June 27, 2021, 06:53:43 pm »
OK,


So the questions:

. OS used as Win??

. using IOLibSuite_17_2_20605_2 only

. installed also the driver as VCP_V1.5.0_Setup_W8_x64_64bits.exe ??

. and before starting the LCR, put the 183xC first in DFU mode or not??

IMHO it is not very clear to me, how your working setup is

Hp

Win 7 64bits
Driver not install and no DFU mode.
I launch the Keysight Interactive IO program, turn on the device and plug in the USB connector, after 5 seconds the device is visible in the program and a green checkmark appears

[attach=1]

« Last Edit: June 27, 2021, 06:55:34 pm by Russ3000 »
 

Offline hpw

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Re: Hantek LCR 1832C unlock
« Reply #59 on: June 27, 2021, 08:50:09 pm »

OK, important is to start the keysight stuff after device connections.

Did the procedure as on my 1833C, and did not helped on Cap, even now the resistors in open mode gets crazy on various frequencies even showing now negative resistor values as -20MOhms.  :-DD

So would love a real calibration store button sequence on the gear, what works even on Cap's  :popcorn:

Hp
 

Offline Russ3000

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Re: Hantek LCR 1832C unlock
« Reply #60 on: June 28, 2021, 06:27:15 am »
It is necessary to wash the board with isopropanol, after which the device works more stable.
 

Offline hpw

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Re: Hantek LCR 1832C unlock
« Reply #61 on: June 28, 2021, 09:45:55 am »
It is necessary to wash the board with isopropanol, after which the device works more stable.

Look, as long my 1833C (not tweaked) is on warranty no openings will happen.

As

. 20210615 is from unknown source
. may a test field release with unknown changes as it looks as digits truncation's only)
. debug & save calibrations get's my into >:D
. cleaning to get ride of solder dust
. may re-soldering as Chinese Chicas / Rubias as none valuable

so Hantek should be more opened and serious what's going on in that matter   :popcorn:

Hp
 

Offline FlashPT

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Re: Hantek LCR 1832C unlock
« Reply #62 on: July 25, 2021, 06:18:51 pm »
Hello,

Could you please tell me what are the values of capacitors
C66,C67, C68 AND C69https://www.eevblog.com/forum/Smileys/default/embarrassed.gif
Hantek 2833 100khzhttps://www.eevblog.com/forum/Smileys/default/bangheadonwall.gif

Thanks

Fernando
 

Offline Dwaine

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Re: Hantek LCR 1832C unlock
« Reply #63 on: August 27, 2021, 08:16:22 pm »
The new firmware is posted on Hantek website now.

LCR2021061501.zip
http://www.hantek.com/products/detail/16180

 

Offline affa

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Re: Hantek LCR 1832C unlock
« Reply #64 on: October 06, 2021, 07:05:48 pm »
Does the 1833 model have those capacitors installed?

Yes the caps are there in the 1833c

I took one for the team and got a 1833c just to see. I was going to get the 1832 but it was only about 30aud diff.

I would get you guys the capacitor values but unfort I am marooned in here due to covid and all my toys more sophisticated than a DMM are in a different country. I do have a line on a agilent 1733c but I'll need to fix it for my friend before it can be used. if anyone has a U1731/1732/1733c please PM me to confirm some component values (they're blown on this one). Sooner I get it fixed the sooner we can get to the bottom of this.

cheers,
affa
 

Offline affa

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Re: Hantek LCR 1832C unlock
« Reply #65 on: October 16, 2021, 02:19:05 pm »
Ok, here we go.

I've taken the capacitors out of circuit for measurement just to be sure. Measurement was done by a Aligent 1733c. I've taken the liberty to present the nearest EIA values. Actual measured values in the pix.

C66 (// with 100k) = 56pF
C67 (// with 10k) = 220pF
C68 (// with 1k) = 470pF
C69 (// with 100R) = 1nF

cheers,
affa
« Last Edit: October 16, 2021, 04:06:10 pm by affa »
 
The following users thanked this post: coromonadalix, Russ3000

Offline Russ3000

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Re: Hantek LCR 1832C unlock
« Reply #66 on: November 07, 2021, 10:44:24 am »
affa, try measuring a 10k resistor at 100kHz. If possible, show a high resolution photo of the board 1833. Thanks.
 

Offline djQUAN

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Re: Hantek LCR 1832C unlock
« Reply #67 on: November 08, 2021, 01:16:32 pm »
C66 (// with 100k) = 56pF
C67 (// with 10k) = 220pF
C68 (// with 1k) = 470pF
C69 (// with 100R) = 1nF

I have just received my 1832C and modded it as per teixeluis' method using Keysight IO which worked a treat. Then I checked the 10k resistor test and got the same 30k reading at 100khz. I measured the caps and they are the same as above so I tried the 'remove them all' trick. The 10k resistor test passed but the capacitance mode is jumping all around and cal would not complete without error.

Running open and shorted cal with the 4 caps installed with 1833 functionality completes successfully but the 10k resistor test still fails.

Even the 300mV readings differ from the 600mV readings so I guess even the voltage level has different cal values too.

Ended up putting the caps and 1832 name back for now until we figure something out eventually.
« Last Edit: November 08, 2021, 02:24:10 pm by djQUAN »
 

Offline Russ3000

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Re: Hantek LCR 1832C unlock
« Reply #68 on: November 10, 2021, 02:42:59 pm »
Everything is perfectly calibrated for me without capacitors, probably you need to try to count the capacitors at a cutoff frequency of about 150 kHz and solder them.

C66 (// with 100k) = 10pF
C67 (// with 10k) = 100pF
And these capacitors can be left as they are.
C68 (// with 1k) = 470pF
C69 (// with 100R) = 1nF
« Last Edit: November 10, 2021, 02:47:34 pm by Russ3000 »
 

Offline djQUAN

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Re: Hantek LCR 1832C unlock
« Reply #69 on: November 14, 2021, 06:58:00 am »
Everything is perfectly calibrated for me without capacitors, probably you need to try to count the capacitors at a cutoff frequency of about 150 kHz and solder them.

C66 (// with 100k) = 10pF
C67 (// with 10k) = 100pF
And these capacitors can be left as they are.
C68 (// with 1k) = 470pF
C69 (// with 100R) = 1nF

I gave it a try and the result is not perfect but useable. The readings still jump but only a few pf now. Before, it was wild at almost 100pf random values.

And the result with the 10k resistor test is more sensible but the reading has a slight rolloff. 9.66k from 100Hz to 40k then 9.57k @50khz, 9.52k @ 75kHz, 9.45k @100khz.

Not perfectly calibrated but I could use it to estimate the DUT's response at higher frequencies. 100Hz to 40kHz calibration does not seem to be affected.

edit: I did both open and short calibration before performing the above testing. I also used 15pf instead of 10pf for no change in displayed value but a little more stable readings.
« Last Edit: November 14, 2021, 10:14:23 am by djQUAN »
 


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