QPLink LCR 1S Smart Tweezer [100Hz - 120Hz - 1kHz - 10kHz - 100kHz] ≈ 50$

[DaneLaw]

Relative Cheap LCR Smart tweezers are coming out of China in bulk these months.

Specs.
0. Measure voltage (up to 16V)
1. Measurement frequency: 100Hz/120Hz/1kHz/10kHz/100kHz
2. Measurement voltage: 0.1Vrms, 0.3Vrms, 0.6Vrms
3. Measurement type: resistance, capacitance, inductance, voltage, on-off, diode
4. Resistance range: 1Ω~10MΩ
5. Capacitance range: 1pF~22mF
6. Inductance range: 1uH~22H
7. Voltage range: ±0.1V~±16V
8. Basic accuracy: 0.5%±2
9. Use time: 7 hours continuously
10. Battery capacity: 500mAh
11. Charging voltage: DC 5V
12. Charging current: 200mA
13. Screen size: 1.47inch, 172*320 resolution
Shell material: ABS+metal
Product size: about 138.00x22.00x15.00mm
Product size: 5.43x0.87x0.59inch

[Promo sales text]
* 1. Advanced Measurement Capabilities: The Digital Smart Tweezer supports intelligent detection and measurement of resistance, capacitance, inductance, voltage,
   continuity, and diodes. It also measures ESR/EPR and Q/D values, providing comprehensive testing solutions.
* 2. Portable Lightweight Design: The LCR SMD ESR Tester features a convenient tweezer design, measuring 138x22mm and weighing only 40g. Its compact size makes it
   perfect for on-the-go use or fieldwork where space and weight are crucial.
* 3. High-Resolution Display: Equipped with a full-view 1.47-inch color IPS screen, the Resistance Capacitance Inductance Continuity Diode Test tool provides clear and
   detailed readings of L, C, R, D, Q, and RS. The intuitive interface enhances workflow efficiency.
* 4. Smart Auto-Range Function: The Auto Multimeter Tools include a smart auto-range feature, allowing the device to automatically select the appropriate measurement
   range for each task. This simplifies the process, reduces setup time, and ensures optimal accuracy.
* 5. Versatile LCR Meter Tweezer: The LCR Meter Tweezer is ideal for a wide range of applications, offering precise and efficient measurements in a compact form factor,
   making it an essential tool for professionals and hobbyists alike.

[DaneLaw]

Anybody familiar with this brand QPLINK?

Same maker that makes the QPLCR?

[Aldo22]

4. Resistance range: 1Ω~10MΩ

That looks like a typo.
Should probably be 1mΩ or 10mΩ.

[KungFuJosh]

4. Resistance range: 1Ω~10MΩ

That looks like a typo.
Should probably be 1mΩ or 10mΩ.

Probably not a typo if it's claiming any level of accuracy.

[csuhi17]

in the linked video, the device measured ~23.1 mOhm.

[Aldo22]

Probably not a typo if it's claiming any level of accuracy.

Yes, that could be the case. There is only the specification of a “Basic accuracy”
The super-cheap Zoyi MD1 has very detailed specifications, depending on range and frequency:

[shenjiaxin]

小程序上位机

[DaneLaw]

小程序上位机  (= mini program)

share it, and details..

[Aldo22]

Anybody familiar with this brand QPLINK?

Same maker that makes the QPLCR?

It all looks like no-name to me.
Apparently they are only available on Banggood.
I haven't found a website yet.
Zoyi etc. (Zotek) seems a bit more trustworthy to me (updates etc.)

[DaneLaw]

Anybody familiar with this brand QPLINK?

Same maker that makes the QPLCR?

It all looks like no-name to me.
Apparently they are only available on Banggood.
I haven't found a website yet.
Zoyi etc. (Zotek) seems a bit more trustworthy to me (updates etc.)

But they cant ship' not stocked - and Banggood are infamous for selling items and having you in limbo.. - but you could get them on Aliexpress the last few weeks.
incl. 25% EU/DKVAT they were around 60$ but all the listings today disappeared, - so when you enter, they all now say "not available to your region"..

Talked with one of the sellers at Yaorea that also experienced this, and the fact that their listings suddenly are being region-restricted.. - they asked Aliexpress from a store perspective, and it seems that Aliexpress needs to "greenlit" listings for certain regions, and even though a given listing already been greenlit.. minor changes on your listing can then result that it again is removed for certain regions.
There is a lot of region-censoring going on, when it comes to Aliexpress & the EU market..

My Aliexpress-wishlists still show them, but can't access, even though it's 3 different sellers..all  3' listing became region-restricted today.
though they will pop back up, when more sellers are carrying them..
None of the sellers on Aliexpress expressed colorchoice ablelity.. for now its random what color that are shipped.

[Aldo22]

@DaneLaw: I also have problems with Aliexpress.
When I want to pay for “Choice” items in my shopping cart with Paypal, they are suddenly no longer “available”.
In addition, AE now charges in GBP instead of USD for Switzerland.
No idea what's going on, but I'll probably have to look elsewhere.

[ivan1956]

Good luck to everyone! I finally got the QP LINK LCR1S tonight. It looks like a good device. And the calibration complete board looks like a kind of dummy, since only resistors are soldered on it, there are no inductors and capacitors, there are only seats for them.

[DaneLaw]

Good luck to everyone! I finally got the QP LINK LCR1S tonight. It looks like a good device. And the calibration complete board looks like a kind of dummy, since only resistors are soldered on it, there are no inductors and capacitors, there are only seats for them.

What's your impressions sofar, does the Tweezer also perform?

As speculated above, It does looks to be from the same "QP" vendor, that also makes the 3'button-white QPLCR, that is making the QPLINK when looking at stores, though the screen UI is also very similar.

Tons of sellers pop back up on Aliexpress.
from around 60$ and up (incl. danish EUVAT)

[ivan1956]

I bought it at the "House Improve Tool Store".
The tweezers for SMD parts turned out to be very good (for comparison, I also have Shannon ST42, FNIRSI LCR-ST1, HP-990C and some other devices), it is much better than FNIRSI LCR-ST1.
Measures the voltage (deviations from the source of the reference voltage are hundredths of a volt). At the same time, it also measures the internal resistance (ESR) of chemical power supplies, giving readings close to those shown, for example, YR1035+.
It measures both the capacitance of capacitors and inductance quite accurately, while showing Q-factor readings close to those of ST42.
This device has control modes for "left-handed" and "right-handed", it is configured in the menu (by long pressing the left button), there is an "Auto" mode (in which the image turns over depending on the position of the tweezers), there are also fixed positions.
In the "Menu" there is a choice of the type of equivalent connection - "serial" and "parallel". However, the connection type is not displayed on the display (as in, for example, ST 42).
The control of the tweezers is convenient, the purpose of the control buttons is easy to remember (there are no instructions included with the device, but as soon as I picked it up, I began to use it, as if it had been with me for more than one year). By the way, there is no charging cable (USB TYPE-C) included, we must also keep this in mind.

[ivan1956]

The back cover of the metal case is screwed with three screws (screw heads for a 6-terminal "star"). The probe tips are screwed with the same screws (2 pieces each). A screwdriver for these screws is included.

[ivan1956]

Now about the disadvantages. It makes measurements of diodes, one can say, no better than FNIRSI LCR-ST1 (with firmware version 1.5). That is, it determines the polarity of the connected diode, shows some kind of voltage drop at the semiconductor junction, but it seems impossible to believe this (like FNIRSI LCR-ST1, it does not show the sum of voltage drops on series-connected diodes, as Shannon ST42 and HP-990C do, but some abstract number). It does not recognize two series-connected silicon diodes, it recognizes only germanium diodes (Schottky diodes were not used).

[u37]

Measures the voltage (deviations from the source of the reference voltage are hundredths of a volt).

You should first measure the input resistance of this "meter". If they were too lazy to turn off the generator, then you are in for a very unpleasant set-up. And you need to know about it.

[TheRegister]

It'd be great if you can check that they really go to 100kHz/0.1V signal level. Might be also a good idea to check with the seller if he can provide user manual and/or point you to the maker's site and FW updates.

[themaster1]

Hi guys, this is my first post here.

I just recently bought my very first ESR tester (model  QPLCR ) and i'm struggling with a few things
1- The language is in chinese if someone knows a trick to enable english i'd be grateful
2 - No manual so i guess i'll have to learn by myself (i'm a total newbie in the ESR test world)

[tigrr]

Hi guys, this is my first post here.

I just recently bought my very first ESR tester (model  QPLCR ) and i'm struggling with a few things
1- The language is in chinese if someone knows a trick to enable english i'd be grateful
2 - No manual so i guess i'll have to learn by myself (i'm a total newbie in the ESR test world)

QPLCR User Manual - PDF, 1.58 Mb https://mega.nz/file/I5UABC6C#jVBlZjjKRdjQ-qyR2wumsVWKOKlYn0bU0DAoV51bvQk

[themaster1]

Hi guys, this is my first post here.

I just recently bought my very first ESR tester (model  QPLCR ) and i'm struggling with a few things
1- The language is in chinese if someone knows a trick to enable english i'd be grateful
2 - No manual so i guess i'll have to learn by myself (i'm a total newbie in the ESR test world)

QPLCR User Manual - PDF, 1.58 Mb https://mega.nz/file/I5UABC6C#jVBlZjjKRdjQ-qyR2wumsVWKOKlYn0bU0DAoV51bvQk

Thanks you are a savior on this one

[koendv]

QPLINK LCR 1S? These tweezers are a voltmeter, continuity tester with beep, and LCR bridge. The tweezers are supplied with a small calibration board and torx screwdriver. The small calibration board only has resistors placed; capacitors and inductances are missing.
The most common measurement I do is checking voltage across SMD components, so I chose QPLINK instead of ZOYI and FNIRSI.
I like these tweezers. My other measuring instruments are in cupboards; these tweezers are within arms length on my desk.

[TheRegister]

Thanks a lot for the user manual for LCR 1S! Do you also happen to know if a FW update is available (or have a link to QPLink site)?

I have played a bit with the tweezers and it looks like the 100kHz mode is a bit gimmicky and not really a fully functional one. For example it refuses to measure caps above 1nF at 100kHz (although the manual stated it should work).

Surprisingly there are a few features supported in the cheaper models (FNIRSI, ZOYI, Aneng etc.) that are missing here. For example the measurements recording, diode polarity detection etc.

Overall I am not sure the higher asking price of LCR S1 is justified unless the additional functionality it has is a must have for the intended usage.

[DaneLaw]

What color did you guys receive? as it seems to be luck of the charm what color they ship, and not something the third-party sellers on Aliexpress seem to have any saying in..

Also purchased one at the singles day sale where the prices dropped quite a bit.
Received the gold/beige variant from this store who was the cheapest at the time https://www.aliexpress.com/item/1005007855017012.html? but do an image search, often an easy way to find the lowest price, as Aliexpress search-results seem far from transparent.

The build does seem like a step up, vs Fnirsi ST1 or Zoyi MD1 with its aluhousing etc' though the rattling buttons, certainly doesn't do it any favors, and it also got what looks like an accelerometer, so it will adjust orientation on the fly, though not a feature that I was in need for, but you can obviously lock it, so it stays as one prefers..
It looks to have the labeled 100, 120, 1K, 10K & 100K frequency selection, and 0.1v, 0.3v and 0.6v voltage.

Noticed that many of the more expensive LCR tweezers like fx *LCRPro1 also settle for the 120Hz option and not just the 100Hz.. (*100, 120, 1K, 10k, 100k)
Seems to be targeted markets with 60hz and full-wave rectification that summons at 120Hz, while the 100 Hz is useful for 50 Hz mains regions..
Thx for posting the manual.

Also picked up one of each of these relative cheap adjustable test boards, one with inductors [1uH-2.2mH], resistance [0-9999999.9Ω], and capacitance [0-11.11111uF]
and see how ST1, MD1 and 1S stack up.

[tigrr]

QPLINK LCR 1S

And is there a website for the manufacturer of these tweezers? For example, to get new firmware.

[TheRegister]

What color did you guys receive?

I got a blue one.

QPLINK LCR 1S

And is there a website for the manufacturer of these tweezers? For example, to get new firmware.

I was not able to find out.

[PA3AZA]

Recently bought this QPLINK QPLCR-1S which came without a manual. Downloaded the qplcr-1s manual linked to earlier in this topic.

On page 4 of this manual it describes a 'peeling function'. Anyone an idea what is meant by that? It is not explained and not in the menu.

[DaneLaw]

Recently bought this QPLINK QPLCR-1S which came without a manual. Downloaded the qplcr-1s manual linked to earlier in this topic.

On page 4 of this manual it describes a 'peeling function'. Anyone an idea what is meant by that? It is not explained and not in the menu.

Likely an attempt to remove parasitic effects from your measurement.. like parallel-resistance on capacitors, and parasitic inductance or capacitance on resistors but I don't know how it works in practice on 1S.



* LCR 1S-PDF-Manual from koendv #21 as a stacked image 6-pages..

[splitchipper]

I think this is referring to the "tare" or "zero" function of the third button from the left. Peeling appears to be a translation error.

I ordered a set of these based on this thread. I received a purple color I have not seen elsewhere. I like these much more than I expected to. I'm going to open it maybe, and when I do I'll photograph the insides. Perhaps I'll even hook it up to an o-scope to see it the frequency and voltage settings are actually as stated.

[labeanchik]

If you hold down the buttons on the edge in the off state, the inscription "BootLoader" appears.
If you connect to a PC in this state, a disk with the name "QPLCR1S-IAP" will appear.

If only I could find the firmware developer...

[electropirate]

Hi everyone. Here is my big test of this tweezers with accuracy measurements
mysku.club/blog/aliexpress/102487.html
Please use Chrome's built-in translation for this page, everything will be clear there. If you have any questions, ask here in the thread

[DaneLaw]

Hi everyone. Here is my big test of this tweezers with accuracy measurements
mysku.club/blog/aliexpress/102487.html

Please use Chrome's built-in translation for this page, everything will be clear there. If you have any questions, ask here in the thread

Very comprehensive test-article electropirate, well done..thx for the link..tons of good info..

If only I could find the firmware developer...

I have tried to ask the seller I purchased mine from  "Personal Professional Tools Store" in regards to further details about the company who makes it, firmware etc,.
but last response was 19-3
"let me verify for you"

Tri3d today to bump again for a reply... will update if it turns out to be anything useful.

[koendv]

FYI. A  low-cost board to check your tweezers.
https://oshwlab.com/koendv/tweezer_calibrate
Hope this helps someone out.

[SegaKHV]

For the happy owners of the tester, I drew a mini case.
https://www.thingiverse.com/thing:7001805/files