New LCR meters, Zoyi ZT-DQ01 and ZT-DQ02 (March 2025)

[Aldo22]

OK, I had to try that out after all. 
So FETCh? works with (and only with) 1.0.8 and returns something like this for a 1k Resistor, 600mV, 1kHz

Code: [Select]

'1.0005e3', '-1.3828', 'R', 'R', 'X', 'AUTO', 'SER', 'SLOW', 'AUTO', '1000', '600', '0', '0', 'R', '1.0000e3', '5.0', '0'
I couldn't get VOLT and FREQ to work.

It seems promising, but I think it's not finished yet.
It's probably better to wait for the documentation.

[ander7]

SCPI commands extracted from firmware v1.0.7

Command	Example output
*CLS
*ESE
*ESE?
*ESR?
*IDN?	ZOYI,ZT-DQ02,903D9C87,V1.0.7
*OPC
*OPC?
*RST
*SRE
*SRE?
*STB?
*WAI
*TST?
:STATus:OPERation?	0
:SYST:ERR?	0,"No error"
:SYSTem:ERRor:NEXT?	0,"No error"
:SYSTem:ERRor:ALL?	0,"No error"
:SYSTem:ERRor:CLEAR
:SYSTem:ERRor:COUNt?	0
:SYSTem:ERRor:CODE?	0
:SYSTem:ERRor:CODE:NEXT?	0
:SYSTem:ERRor:CODE:ALL?
:SYSTem:VERSion?	1999.0
:STATus:OPERation:EVENt?	0
:STATus:OPERation:CONDition?	0
:STATUS:OPERation:ENABle?	65535
:STATUS:OPERation:ENABle PARAM
:STATus:QUEStionable?	0
:STATus:QUEStionable:EVENt?	0
:STATus:QUEStionable:CONDition?	0
:STATus:QUEStionable:ENABle?	65535
:STATus:QUEStionable:ENABle PARAM
:STATus:PRESet

But I don't see any commands to fetch values in this version.

[Aldo22]

SCPI commands extracted from firmware v1.0.7
But I don't see any commands to fetch values in this version.

No, only in 1.0.8. That's what I wrote above.

[ander7]

No, only in 1.0.8. That's what I wrote above.

Where did you get 1.0.8 firmware?

[Aldo22]

Seems like there's a rebrand from ANENG, as LM06 (DQ01) and LM08 (DQ02).

https://www.aliexpress.com/item/1005009173709248.html

Weird enough, the "pro" version of those don't include the Kelvin clips, just the standard (on their multimeters) extra pair of test leads.

True, I've just noticed that too. It seems to be the same with all stores.
For me, it was the included Kelvin clips that made me press the order button.
I also wonder why they include standard DMM test leads and not these tweezers, which are much more useful for SMD and often for in-circuit measurements.
They are certainly not more expensive.

[Aldo22]

No, only in 1.0.8. That's what I wrote above.

Where did you get 1.0.8 firmware?

https://www.eevblog.com/forum/testgear/new-lcr-meters-zoyi-zt-dq01-and-zoyi-zt-dq02-(march-2025)/msg5929764/#msg5929764

But beware, there are new bugs, I'm back to 1.0.7.

[gameru]

Hi everyone,

Did you see this video? →

At around minute 11, the reviewer tries to measure a resistor, and the value shown by the Zoyi DQ02 is almost twice the real value.

Have you encountered this issue as well? Is it normal for this LCR meter to show such a big error when measuring resistance?

The guy in the video used a 0.22 Ohm 3-leg non-inductive resistor and compared the measurement with a Vici VC480C+. The DQ02 displayed a value that was about twice as high.
I’ve also ordered the Zoyi ZT-DQ02, but it hasn’t arrived yet.

[coromonadalix]

and the FW version is  ?   unless i did not see that in the video ?

that's an important one to list   when you create video(s)

[Aldo22]

Have you encountered this issue as well? Is it normal for this LCR meter to show such a big error when measuring resistance?

Youtubers often do strange things. 
I don't see the problem with my device (FW 1.0.7).
In the attached photo 100mΩ.

[gameru]

Hi! I didn’t create the video, I just watched it and shared my thoughts based on it. But yes, I agree – the firmware version is definitely worth mentioning!

[Alphataurus]

On mine, FW version 1.0.7, there is another bug there.

The tests are done using 1% resistance, with the BAT connector on Zoyi I get 99.45 mOhm, with YR1035+ 99.9 mOhm, and with the YR2050 99.88 mOhm.

Inserting the resistor in the rectangular connectors of the Zoyi, the results are in milliohms at levels 0.1V / 0.3V / 0.6V, the last digits sometimes are not stable and can fluctuate up to about +/- 1 mOhm:

100 Hz: 101 / 101 / 101
120 Hz: 101 / 101 / 101
1000 Hz: 101 / 46 / 46
10 KHz: 102 / 102 / 102
100 KHz: 110 / 124 / 105

There are also bugs in the manual ranges, sometimes I get measurements of 150 or even 170 mOhm in the lower 100 Ohm range, and good ones in the 100 KOhm range, sometimes they are solved by changing the range and selecting it again, and sometimes not.

It is true that for more precision in such low resistances the higher connector should be used, but these errors are unacceptable, I don't have time to test higher resistances, but I wouldn't be surprised if they also happen.

[Alphataurus]

and the FW version is  ?   unless i did not see that in the video ?

that's an important one to list   when you create video(s)

He is using FW 1.0.7, minute 7:05

[Aldo22]

100 Hz: 101 / 101 / 101
120 Hz: 101 / 101 / 101
1000 Hz: 101 / 46 / 46
10 KHz: 102 / 102 / 102
100 KHz: 110 / 124 / 105

I think there is something wrong with the “REL” function.
Try a factory reset, no “REL” and measure again. That helped in my case.

[papabol_24]

Hi everyone,

Did you see this video? →

At around minute 11, the reviewer tries to measure a resistor, and the value shown by the Zoyi DQ02 is almost twice the real value.

Have you encountered this issue as well? Is it normal for this LCR meter to show such a big error when measuring resistance?

I think its because he did a resistor (1M) calibration without actually connecting a 1M resistor.

[Alphataurus]

100 Hz: 101 / 101 / 101
120 Hz: 101 / 101 / 101
1000 Hz: 101 / 46 / 46
10 KHz: 102 / 102 / 102
100 KHz: 110 / 124 / 105

I think there is something wrong with the “REL” function.
Try a factory reset, no “REL” and measure again. That helped in my case.

Bravo! this solves the readings at 1 kHz in auto mode, at 100 kHz I still sometimes have the somewhat inconsistent 110 / 124 / 105 or similar, although this is not a big problem because it should not be measured at this frequency.

Just as you said, it seems that the problem is in the REL button, I never tried to use it, but I surely pressed it in the past sometime. It seems to save some configuration for the different frequencies, levels and ranges. Not bad, but it doesn't indicate anywhere when a relative measurement is being made.

With manual ranges, I still sometimes get measurements of 170-180 milliohms at 100 Hz, 0.6V, 100 Ohm range, and good ones at 100 kOhm range. It looks like the bug is there, and it is the one that happens to the guy of the video.

[GigaJoe]

1.0.7: another bug , manual range 100 Ohm
1K or others - "OL"
and this range "100 ohm" , do displayed regardless R , C ,or L ...



"REL" option are pure devil..  first: not precisely define REL .. ;   if you press and hold couple times it finally shows '0'  , then it save the result , so power ON/OFF  recall last REL status ....

for 1.0.8  or let say BETA 1.0.8 , REL disabled but still exist for C and L ...  guess they may fix behavior for resistance

[Aldo22]

"REL" is a really strange, cryptic thing. Somehow it only seems to work with 0.6V.
There is absolutely no indication that it is working. You can't undo it either (except with factory reset), although it interferes with subsequent measurements.
In 1.0.8 it seems to have been disabled (or not?). But that's not good either, because you need it for 2-wire measurements (tweezer, test leads).

The ZT-DQ02 is really the most half-baked device I've ever had from Zotek. The MD1 is more reliable.

[Nospa]

I got a DQ02 today and checked the output signal on the scope...

Question: The 'Level' setting appears to be RMS and not Peak-to-Peak. Is this expected?
My expectation would have been 'Level' to be the Peak-to-Peak. E.g. setting 0.1V to avoid activating any P-N junctions when measuring in circuit.


Level 0.1V


Level 0.3V


Level 0.6V


Level 0.1V + Bias 0.5V


Level 0.3V + Bias 0.5V

[Nospa]

and this range "100 ohm" , do displayed regardless R , C ,or L ...

I think 'range' does NOT refer to the measurement range (like on a DMM).
The 'range' setting could allow to manually select the internal range resistor value that is used during measurement. So it doesn't matter if you are measuring R, C or L - it will always be an Ohms setting.

This video helps getting a grip on how these things work:

The range resistor is explained too...

[GigaJoe]

great , thanks, i'm kinda forgot about ..
Manual says "15  Range |  Displays  the  set  resistance  test  range "

[AnaMary]

Hola, de donde descargaste la versión 1.0.8? En la pagina de Zoyi solo te deja descargar la 1.0.7, agradecería me indiques de donde descargarla o me la envíes, un saludo.

Traducción Google:
Hi, where did you download firmware 1.0.8? Zoyi website only lets you download firmware 1.0.7. I'd appreciate it if you could tell me where to download it or send it to me. Best regards.

[Nospa]

Apparently the new Zoyi homepage doesn't list all firmware versions.
The old hompage does: http://www.szzotek.com/h-col-159.html
I'm attaching the 1.0.8 version downloaded from the old site along with the google-translated release notes (originally a picture of chinese text inside the original zip).
The fw file is the .bin.txt file - can't upload w/o messing with the file extension.

Also apparently another 1.0.8 file exits that was posted on a chinese forum - super messy situation...

EDIT: This is for the DQ2 obviously...

[TvNieuw]

Hi, Update from the Netherlands.

Quite pleased with my ZT-DQ02 FW 1.08.
However I did find some quirks.

When calibrating the Battery testleads [short] and [-60V] the calibration would always fail with FW 1.08.
To investigate I downgraded to FW 1.07. Calibration for [short] and all Voltages were GO!
After upgrading again to FW 1.08 and trying to calibrate the battery testleads, [short] and [-60 V] would fail time and time again.

Why you'd wonder? Well after some thinking I had an idea to isolate the Kelvin clips. When shorting Hcur and Lcur only the [short] calibration went okay.
After the [short] was done the Calibration of [-60V] also worked.

After generating and calibrating positive and negative 60V 10V and 1V it seems to be much more precise in measuring Voltage.
I'm still not convinced the Battery Ohms measurement is accurate.

[GigaJoe]

so i got one of 18650 , measure voltage load \ no load .   got 0.24 ohm .   then try a difference more load \ less load, same resistance.
DQ02 - shows 0.094 ohm ;  some charger 0.055 ohm ( but i guess it so so) ...

I'm measure \ calculating over V and A using load incorrectly , or still incorrect DQ02 measurement ? I do not calibrate it at all ... (waiting resistors )

[Alphataurus]

so i got one of 18650 , measure voltage load \ no load .   got 0.24 ohm .   then try a difference more load \ less load, same resistance.
DQ02 - shows 0.094 ohm ;  some charger 0.055 ohm ( but i guess it so so) ...

I'm measure \ calculating over V and A using load incorrectly , or still incorrect DQ02 measurement ? I do not calibrate it at all ... (waiting resistors )

I think the DQ02 uses the AC method to measure the internal resistance of the battery, when I received it I compared the results with a yr1035+ and IIRC they were not exactly the same but similar.

I think I read something about it on this forum but can't find it, maybe this might help:

https://lygte-info.dk/info/Internal%20impedance%20UK.html
https://lygte-info.dk/review/InternalResistanceMeterYR1035%20UK.html