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Digital panel meter - Voltmeter / Ammeter - made in China.

CMS 20301 78
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  • #61
    M.R-V4
    Level 21  
    An alternative to the measure / indicator described above can be the D85-3051AG model. It is bigger (and more expensive), but in my opinion it is more readable. Of course, it also has the ability to calibrate, but "out of the box" it shows what a universal meter, although it is no ;)

    The price is about PLN 30 on the Chinese portal. This is how it looks in the pictures:

    Digital panel meter - Voltmeter / Ammeter - made in China.
    Digital panel meter - Voltmeter / Ammeter - made in China.
    Digital panel meter - Voltmeter / Ammeter - made in China.
  • #62
    damian1115
    Level 34  
    When this topic has already started again, and there are more and more news on the Chinese market, I would like to ask my dear colleagues what do you think about this gem.
    Digital panel meter - Voltmeter / Ammeter - made in China.
    https://pl.aliexpress.com/item/4000111098529....scm=1007.13338.192130.0&scm_id=317.133b.1933l =&scm_id=317.133b6.1933l =&scm_id=317.133b.1933l=21 -4a92-b013-47f3fbe4e38d & _t = gps-id: pcDetailBottomMoreOtherSeller, scm-url: 1007.13338.192130.0, pvid: fbca6c31-6583-4a92-b013-47f3fbe4e38d, tpp_buckets% 2361968% 2361933% 2361968% 2361933% 2361968% 2361933% 2361968% 2361933% % 23192 130% 230_3338% 233142% 239 890% 234_668% 232 846% 238 115% 232000_668% 232 717% 237 565% 23773_668% 231000022185% 231000066059% 230_668% 233,422% 2315,392% 23,326
  • #63
    CMS
    Administrator of HydePark
    I have it, it works fine, but the Chinese descriptions on the front are annoying.
  • #64
    M.R-V4
    Level 21  
    I have a similar one, the indications are also correct after a small calibration.

    Digital panel meter - Voltmeter / Ammeter - made in China.
    Digital panel meter - Voltmeter / Ammeter - made in China.
  • #65
    gimak
    Level 40  
    I would be more interested in indicating not the power, but the energy that has been passed through this meter in the time period I am interested in, e.g. how much energy I got from PV panels on a given day, week or month.
  • #66
    damian1115
    Level 34  
    M.R-V4 wrote:
    I have a similar one, the indications are also correct after a small calibration.

    Your one is a bit different where you bought it.
  • #68
    ElectroTom
    Level 25  
    To the post by Damian. For me, the parallax error caused by the lcd display is irritating.
  • #69
    Szyszkownik Kilkujadek
    Level 37  
    ElectroTom wrote:
    To the post by Damian. For me, the parallax error caused by the lcd display is irritating.

    Can you tell by what miracle on a digital display you can get a parallax error? :-)
  • #71
    ElectroTom
    Level 25  
    That's how it reminded me. Parallax - the effect of incompatibility of different images of the same object observed from different directions.
  • #72
    mumotg
    Level 2  
    Hello, I bought 2 meters like in 1 post and both show 125A at once. It turned out that the Chinese did not solder the shunts, the question is what shunt should be soldered there?
  • #73
    gimak
    Level 40  
    Maybe not so much the Chinese forgot, as you forgot to enter the current range. In this case, the shunt will probably not be soldered, but connected with screws. Shunt suitable for the measured current range with a 75mV output (connected to the module).
  • #74
    mumotg
    Level 2  
    Hello, what shunt should be soldered to 10A?

    Added after 7 [minutes]:

    Can it be like that? Digital panel meter - Voltmeter / Ammeter - made in China.
  • #75
    gimak
    Level 40  
    Assuming that there should be a voltage drop of 75mV on the shunt at 10A, this resistor is a bit too big and probably with its use the meter will show 10A with the actual flow of 7.5A.
  • #77
    Szyszkownik Kilkujadek
    Level 37  
    A resistor with a voltage drop of 10A at 75mV. Just.

    Added after 2 [minutes]:

    Of course, you also have to take into account the power that will dissipate on this resistor during the flow of the maximum current.
  • #78
    gimak
    Level 40  
    I will not answer unequivocally, because I do not know what the module you have looks like and whether there is a place for soldering the shunt.
    I have two types of such modules, both with 10A range. In one there is a piece of wire soldered as a shunt, and in the other one there is no such soldered wire and its role is probably played by the appropriate thickness of the tin on the path.
    Judging by the shunts for such modules that I saw on the Allegro, for example 50A -75mV, i.e. with a current of 50A, there is a voltage drop of 75mV on it and this voltage drop is measured by the meter and the reader shows it as 50A - I think, because no I played these blocks with electronic meters.
    So with a 10A shunt, by analogy, the resistance of this shunt should be 0.0075? (7.5 m? ;) so that at a current of 10A there would be a drop of 75mV on it.
    I admit that I cannot imagine such a precise soldering of such a shunt.
  • #79
    mumotg
    Level 2  
    Thanks for the answers, that's my measure Digital panel meter - Voltmeter / Ammeter - made in China. I trimmed the shunt with it and soldered it on Monday, I will see how the measurements will come out Digital panel meter - Voltmeter / Ammeter - made in China.