Hantek 2000 series - 2C42/2C72/2D42/2D72

[lcfvrn]

Thank you, Microcheap. I can confirm. It is possible to turn 2d42 to 2d82 using DFU firmware update. And I can confirm that all "automotive" features are just presets. Even CAN bus analyzer... just scope with timing/voltage preset.... be careful if you are going to buy 2d82 because of CAN bus analysis. There is no data parser, no id monitoring.
Firmware from AxGxP is better.

[uncle_sem]

In ealier versions of the 2D82 firmware there was very nice probe menu with current clamps etc. Now you can only choose these in diagnosis mode.

[Rien]

Hi,

I think I have put voltage on the terminals when the meter stand in Ohm After opening I have seen 2 o resistors on the underside of the CS7721CN chip above the banana bushes. which are burned. Is it possible to send me a detailed picture of that part of the print, so I can put on new parts?  It is R14 and R 15 as far as I can see

Tanks a lot

[Microcheap]

If only the resistors are burned you are lucky, it's likely that you have damaged the dmm chip. Anyway, if you want to try to repair it, I opened up mine to check the resistors values: R14 is 10K 1% and R15 is 1K 1%.

I've tried to take a picture as well, it is not great but it may help.



Just curiosity, what was the voltage you were measuring?

[Rien]

Hi Thanks for your fast response.
Yes I think You are right, but I wil give it a Try. All other funktions are working and ok, even the Resistance obove 50K. When I try to mesure 10 K for a very short time the value is displayed.
I was to fast trying the Meter before I have give a good look at the menue. The voltage was 220 V alternating

Have done , but the result is not good  47r r is read 51r 330r = 360r  460r = 5,10K  510r = 5.6K  2k2 = 21 k 3k3 = 3.6k 4k7 = 4.6k 5k = 5k  50k =50k 200k =280k
So i can forget the measuring of Resistance  with this meter. but my own fault.

I was not happy with the result, so I have measured on the resistors and I came to the conclusion that they were connected to each other on the processor side, a small connection of tin I remove that, and guess, everything is working now.   But what a delicate job for an old men

[Rien]

Hi I have a Hantec 2c42 but now after update it is changed in an 2D82 I like to go back to my original 2C42, but how? When i try to update again the meter is seen as an 2D82 an FPGA V255

[Microcheap]

Try using the options "Force update ARM" or "Force update FPGA" or simply manually install the correct FW using DfuSe:

https://www.eediscuss.com/forum.php?mod=viewthread&tid=13676&fromuid=26055


By the way, did you managed to fix the multimeter?

[Rien]

Thanks I try that. The meter is working as before yes , see my answer above.
I have take a look at it, first try was no succes, but after that I have downloaded both files and then force update with local files. That was the solution.
Everything is now ok also the resistance measurement.

[Pinkus]

Caution, my Kaspersky shows a Trojan-warning when I tried to enter the eediscuss-site.
Though it might be a false alarm, but I would not bet on it.

[Microcheap]

Caution, my Kaspersky shows a Trojan-warning when I tried to enter the eediscuss-site.
Though it might be a false alarm, but I would not bet on it.

Probably a false alarm, I never had a problem there. I also checked it with Virustotal.com and it came clean:

[Microcheap]

Have done , but the result is not good  47r r is read 51r 330r = 360r  460r = 5,10K  510r = 5.6K  2k2 = 21 k 3k3 = 3.6k 4k7 = 4.6k 5k = 5k  50k =50k 200k =280k
So i can forget the measuring of Resistance  with this meter. but my own fault.

There are 2 potentiometers close to the batteries' holder on the PCB, those are used to calibrate the meter. I just tried that once and if I recall, one adjust the AC modes and the other DC (voltage, current and resistance are adjusted at the same time). The pots are very sensitive and I strongly recommend not to play with then if you don't have another good meter to use as reference, the chances are that you will make things worse.

[Rien]

Thanks for the info, can you tell wich poti is for what? My meter is working now good. I have tested the X-Y scope measurement and that is also workung nice. I think it is fot the hobby al good meter for a nice price.

[Microcheap]

I like it too, it has its limitations but many times I prefer it over my ds1054z to quickly inspect a signal on a board or make a simple measurement.

Regarding the pots, I know one was for AC mode and the other to DC, but I really don't remember which one is which I should have take note when I had the chance.

[amham]

There are multiple sellers on Amazon, anyone know who is selling the latest versions for the 2D72?

[Rien]

Hi,
I like to know is it possible to make an 2C72 from an 2C42 with the ST-Link utility I have seen at github.com/circuit-specialists/Hantek-2D72 the bin file and other things.
Is it still possible after flashing this bin file in the Hantek, to download updates for the instrument. I guess thet the meter must be on when the ST-Link V2 is connected to the meter??
Thanks for your reaction.
Rien The Netherlands

[AxGxP]

42 and 72 has hardware differences.

The firmware is the same.
You can change the name of the device fro, 42 to 72 by changing one byte in the flash, but it is only the device name.
There no difference in functions.

[Microcheap]

42 and 72 has hardware differences.

Do you know what are the differences between them?
I have the 2D42 that was changed to be recognized as a 2D72. I remember that I calculated the BW with and without the "hack" measuring the rise time of a fast rising edge pulse. The difference was clear what makes me believe that there is at least some sort o BW limitation in the FW depending on the model.

I'll try to repeat the test later and post the results here.

[mostorer]

Hi Microcheap, I have a 2c42 from a few weeks and found this forum, so I decided to buy the DAC, opamp and what is needed and hack the scope to add AWG.
After adding and changing the needed components, except the R61, I flashed the dfu to calibrate but ...
... the screen appears upside down and, when pressing "calibrate" it says to me "calibration failed". 

Going back to the last firmware version from Hantek, the amplitude of the waveforms is a bit too much: a square waveform at 1V appears on the scope as 6V, while sine or triangular appear truncated.

where could I have gone wrong?

[Microcheap]

To calibrate the awg you need to connect the Gen Out to the CH1 of the device using a coaxial cable, did you do that?

What is your FW and FPGA version?

[mostorer]

Checked with the help of another scope...
Found that the 150ohm resistor at pin 2 of EL5166 was in short circuit, so changed with a new one. After that the things were better, but not exactly as expected.
I checked the outputs from DAC and levels were ok, so I decided to change the feedback resistor on the output opamp. From 560 to 186.
Now it works like a charm.
 

[mostorer]

Hi Microcheap, the FW version is the one you posted to permit calibartion, as the current FW version does not permit AWG calibration.
FPGA version is the last one, so 04.

About coaxial cable, I was wondering if using the normal probe wasn't enough at least to see calibration process running. Then, of course, to have the right calibration the coax cable is important.

If you could confirm me the FW and FPGA release (including the upside down screen), I could try newly using the suggested resistor values.
I would do that as I have a little concern about waveforms amplitude.
I was supposing that, setting a sine wave with Amp at 2.5V I would have on the scope a wave with 2.5V p-p, while on the manual I have just seen within the example that the p-p value showed on the screen is 5V, so the amplitude should only be related to a semi-wave. 

Thank you in advance for your patience.

[gf]

I was supposing that, setting a sine wave with Amp at 2.5V I would have on the scope a wave with 2.5V p-p, while on the manual I have just seen within the example that the p-p value showed on the screen is 5V, so the amplitude should only be related to a semi-wave. 

Unless explicity stated, it is IMO never perfectly clear wheter "amplitude" is supposed to mean peak-peak or semi-wave (or even something else). Yet another difference makes the terminatinion impedance. With no load you get 2.5V semi-wave, but when you terminate the output with 50 Ohm, you'll indeed see your expected 2.5V_pp, due to the 50 Ohm output impedance of the AWG. It all depends...

... Found that the 150ohm resistor at pin 2 of EL5166 was in short circuit, so changed with a new one. After that the things were better, but not exactly as expected. I checked the outputs from DAC and levels were ok, so I decided to change the feedback resistor on the output opamp. From 560 to 186 ...

That's odd. If things are off by say 10..20%, then it is still plausible, but factor 3 isn't.

Is everything related to the AWG populated as in a geniune 2D72?

Are the various 0 Ohm resistors replaced with the actual values as well?

Are the 49.9 Ohm (68X) resistors from the DAC outputs to GND present?

What DC voltage do you measure from DAC pin 17 to GND, and from pin 18 to GND?

What is the value of your R_set resistor, from DAC pin 18 to GND?

When you set the AWG to rectangle with amplitude=2.5V and offset=0V, what peak-to-peak voltages do you measure on the two DAC outputs?
Expected are about 500mV_pp on one output, and about 850mV_pp on the other one.

EDIT:
I have added photos of a genuie 2D72.

Regards,
gf

[mostorer]

Thank you so much gf.

Next days I will find the time to newly open my 2c42, check all resistors value (they should be ok, as I followed instructions found on this thread and double checked with published images), measure all pins value and report back on this thread.

At the same time I will try to find a bnc-bnc cable to comlete the job. I was quite sure to have one but not able to find it now and, given the current situation, not sure to be able to find one quickly.

Regards.

[gf]

...so I decided to change the feedback resistor on the output opamp. From 560 to 186...

Btw, did you change only one resistor here? Note that U13 is supposed to act as differential amplifier with symmetrical feedback network, in order to eliminate common mode gain/bias. Making it asymmetric defeats this goal.

See https://en.wikipedia.org/wiki/Differential_amplifier#Symmetrical_feedback_network_eliminates_common-mode_gain_and_common-mode_bias

gf

[mostorer]

Yes, you are right but, to be a simmetrical diff amplifier as I also supposed (as also suggested on ADC902E datasheet) I should have to find a resistor from U13.3 to gnd. Not being able to find it. Also all resistors I have are exactly as in your picture, so if there is one (as it should), it was already the right one.

mostorer