Test/review of Internal Resistance Tester YR1035

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HKJ
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Test/review of Internal Resistance Tester YR1035

Internal Resistance Tester YR1035


DSC_7156

This is a meter designed to measure internal resistance in batteries.

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I got the meter in a random shipping cardboard box, it contained:
The meter, 4 terminal probes with extra pogo pins, 4 terminal clamps, 4 terminal battery holder and a manual in Chinese (It is possible to order with the accessories that you want).

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The meter has a recharge battery inside and is charged from a micro usb connector.

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It uses a round metal connector for the four terminal connection. The connector is locking, i.e. the plug cannot fall out. Pulling the ring on the plug will unlock it can be pulled out.

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The meter has Chinese text in the display and it is not possible to select English.

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For just using it as a milli-Ohm meter it is not really an issue.

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When not used for some time, it will go into standby mode, this requires a button pres to leave.

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There is a couple of buttons:
Power is used to turn on/off the device.
Hold/Zero is used to freeze the ohm reading, I did not have much luck with the zero function.
Range R is used for manual range select on ohms (20m, 200m, 2, 20, 200, auto).
Range U is used for manual range select for volts (1V, 10V, 100V, auto).

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Four terminal probes made with pogo pings in aluminium tubes and some shrink wrap.
The wires are soft silicone.

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A closer look at the business end.

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If a pogo pin is damaged, it can be pulled out and a new one pushed in, the pack included four spares.

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The plug looks like a fairly good quality.

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The clamps are a cheap Chinese four terminal model.

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The battery holder is a fairly standard four terminal holder (I use same type for my battery test). It is not the fastest way to connect a battery, but gives stable connections.





Measurements


  • The ohm meter is 2200 count display
  • The voltmeter is a 100000 count display.
  • The AC used to measure ohms are 1kHz at up to about 100mV rms, it will vary with range and measured resistance.
  • Output voltage when open is about 2.5Vrms.
  • Power consumption while off: 5.1uA
  • Power consumption while on with light: 65mA
  • Power consumption while on with light and shorted probes: 140mA
  • Power consumption in standby mode: 15mA


ohm

Due to the way the meter works it do not need a battery to measure resistance, but can be used as a general milliohm meter.
Here I am testing on some resistors and comparing to a very precise meter.
The precision is very good.

volt

The same with voltage, again the precision is very good and it has lots of digits.

10ohm

The meter is using a 1000Hz sinus for measuring the resistance

21.9ohm

The maximum AC voltage is about 30mVpp when measuring 22 ohm.

220ohm

The maximum AC voltage is about 300mVpp when measuring 220 ohm.

unloaded

With unloaded outputs the voltage will be considerable higher at about 5.3Vpp



Tear down

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I had to remove four screws to open the box.

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it is a standard project box with some machining and a custom frontplate.

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The circuit is on two circuit boards, one for the display and one for everything else. The used battery is a LiIon 18350 cell marked with 900mAh.

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Four more screws and I could remove the circuit board.

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Markings has been carefully removed from nearly all the chips.

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Before removing the display board I unsoldered the battery (Only one connection).

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There are two mechanical relays and space for a usb interface chip (U7). There is 5 trimpots to calibrate it with.

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Conclusion

This milli-ohm meter is very good and can both be used to measure internal resistance in batteries and to measure small resistors with. Because it uses AC it will give too high reading on anything inductive, but measuring resistors and small metal pieces works fine.

When using it as a milli-ohm meter the Chinese text is not a big problem, but it is a bit tricky to change any options or use the more advanced functions.



Notes

As reference I used my Keithley DMM7510, it can do 4 terminal ohm measurement.

Vapcell Internal Resistance Tester YR1030
Internal impedance/resistance of batteries

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

HKJ
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kiriakos wrote:
For 15$ retail price with out any accuracy specification’s I think of it as toy full of trim-pots.

That is silly, at $15 it is a steal, but I doubt you can get a new one for that.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

HKJ
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kiriakos wrote:
You seem unfamiliar with Chinese pricing policies.
Actually you may get it for 12$ USD

https://www.ittsb.eu/forum/index.php?topic=966.msg3466;topicseen#msg3466

YR1030 and YR1035 is not the same meter and you did not provide a link to your price, only to a silly guy listing specifications.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

HKJ
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kiriakos wrote:
Now delete your lies about 100000 digits volt measurement.

The YR103*5* uses 100000 volt display, I would not expect the precision to be that good.
If you look in the review you will see a photo of the display showing all the digits.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

HKJ
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kiriakos wrote:
I can not see something that is not there, take a picture at 1V DC operation.

Why, there is a picture showing the number of digits and a table showing how precise it is.
Anyway asking about 1V would not show the full 5 digit resolution.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

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Thanks for the review!

I think kiriakos must be related to Gauss!!! Facepalm

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Venom
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Is this tester the same as the Vapecell YR1030?

HKJ
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Venom wrote:
Is this tester the same as the Vapecell YR1030?

No, it is an upgraded version of it.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

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HKJ wrote:
Venom wrote:
Is this tester the same as the Vapecell YR1030?

No, it is an upgraded version of it.

Thanks for the reply!

s5610
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HKJ wrote:
The YR103*5* uses 100000 volt display, I would not expect the precision to be that good.

But it is, actually. I ordered YR1035 yesterday for $40, will leave a link on Ali seller if the item will be all good.

That kiriakos is crazy, he copied all eevblog forum and made himself admin there. That’s shocking… )

HKJ
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s5610 wrote:
HKJ wrote:
The YR103*5* uses 100000 volt display, I would not expect the precision to be that good.
But it is, actually. I ordered YR1035 yesterday for $40, will leave a link on Ali seller if the item will be all good.

If you look at my table you will see it is not (I used a meter that is way better than Fluke 287 for comparison).
It is easy to make a fairly precise meter today, but maintaining precision over temperature changes, time, etc. is much harder.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

s5610
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HKJ wrote:
If you look at my table you will see it is not (I used a meter that is way better than Fluke 287 for comparison).
It is easy to make a fairly precise meter today, but maintaining precision over temperature changes, time, etc. is much harder.

I agree.

Unfortunately I don’t have access to serious metrology equipment, but I got these readings with AD584LH (+-5mV 10V) on my YR1035 item:

10,004 V
7,4995 V
5,0020 V
2,4966 V

Sure higher priced meters tend to have lower drift, but any precise equipment needs to be calibrated time to time )

HKJ
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s5610 wrote:
Sure higher priced meters tend to have lower drift, but any precise equipment needs to be calibrated time to time )

Calibration is verification, it do not include any adjustment, this is, of course, required if you need to know that your meter stays precise.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

Lux-Perpetua
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Does this device measure the impedance or the resistance of a battery? I'm just wondering as the 1kHz AC method is called "impedance" and this device seems to measure the same way the SM8124A (impedance meter) does.

HKJ
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Lux-Perpetua wrote:

Does this device measure the impedance or the resistance of a battery? I’m just wondering as the 1kHz AC method is called “impedance” and this device seems to measure the same way the SM8124A (impedance meter) does.

It is the impedance.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/