Maximum \/ minimum value<\/strong><\/li><\/ul>\n\n\n\nThe automatic mode is a mode in which the without changing anything in the multimeter automatically recognizes if we are measuring voltage, resistance or continuity. I have not tested it exhaustively since it is not an option that particularly appeals to me, nor do I see much use for it in a multimeter of this type. I will also have the opportunity to test it in depth with the Zoyi ZT-5B.<\/p>\n\n\n\n
The possibility of using a mobile phone or a tablet to record measurements has always been very attractive to me, since I am going to have the opportunity to test three devices that communicate with the same application and I will dedicate an article exclusively to it.<\/p>\n\n\n\n
The NCV (Non Conctact Voltage) function or non-contact voltage test allows us to determine where the electrical conduits are going or if a cable is under voltage or not.<\/p>\n\n\n\n
Tests<\/h1>\n\n\n\n
The first test that I usually perform on multimeters is the resistance measurement and I do it with a matrix of 7 decades of 1% precision resistors. Whenever I put a multimeter in resistance measurement I measure the resistance of the test leads by short-circuiting them and seeing the resistance they give, being typical values \u200b\u200bof 0.1 \u03a9 or 0.2 \u03a9. The first surprise has been when I have seen a value of 0.0 \u03a9. When measuring the 1.0 \u03a9 resistance, the value obtained was 0.8 \u03a9, 20% lower, well above the 1% tolerance of the resistance and \u00b1 0.5% of the relative error of the device. However, the absolute error is \u00b1 3, and therefore we have 0.8 \u03a9 \u00b1 (0.5% + 0.3) \u2248 1.0 \u03a9 \u00b1 1%, that is, within the precision range. From what I have been able to see in my tests, it may be an excess in the calibration, that trying to read a 0.0 when the test leads are short-circuited leads to an absolute error of 2 counts. In general it is not something worrisome, but it must be taken into account with values \u200b\u200blower than 10 \u03a9. One positive note is that resistances up to 60 M\u03a9 can be measured.<\/p>\n\n\n\n
The direct voltage (DC V) measurement test has been shown to have better than specified accuracy. Again I have been able to observe an absolute error of +2 counts almost constant throughout the tested range (from 1.5 V to 34 V).<\/p>\n\n\n\n
In direct current (DC A) the precision up to 4 A is better than that specified and up to 8 A it is within the error margins specified in the manual. I have not been able to accurately measure the error above 8 A. Taking into account that the maximum is 10 A, that currents of that intensity can only be measured for a few seconds and that the normal for these current values \u200b\u200bis Using a clamp meter, we can say that the DC current measurement is reliable and sufficient.<\/p>\n\n\n\n
In alternating voltage (AC V) I have verified the behavior of the real effective value (TrueRMS) with different types of wave at different frequencies, being within specifications up to frequencies somewhat above 1 kHz, the precision falling rapidly above 1.5 kHz. I have also verified that the advertised precision is met (even above the specifications) in the range of 40 mV to 12 V (sine wave at 50 Hz).<\/p>\n\n\n\n
In alternating current (AC A) the accuracy is within specification (somewhat better, in fact) for the mA ranges. In the ranges of A and for currents from 0.1 A to 2 A tested, the accuracy has improved significantly.<\/p>\n\n\n\n
I have tried capacitor measurement with some capacitors that I had stored from about 22nF up to 2.2mF. I have not calculated the margin of error because I do not have a device with sufficient precision with which to compare the measurements, however the measurements have been compatible with the captions of the capacitors and very close to the measurements that I have obtained with another multimeter.<\/p>\n\n\n\n
These last measurements, those of AC voltage \/ current and those of capacitors, are new tests that it has taken me a while to have available, still as rudimentary as I have done. I hope to improve these tests in the future.<\/p>\n\n\n\n
Conclusions<\/h1>\n\n\n\n
The ZT-300AB is an ideal multimeter for students, electronics and robotics enthusiasts, DIY enthusiasts, or as a second multimeter.<\/p>\n\n\n\n
For about \u20ac20 we get a small device that measures the usual magnitudes with acceptable precision. It adds the non-contact detection of voltages (NCV) and the mobile application. A student or a hobbyist of electronics \/ robotics does not need more and its size is advantageous. For a professional, it can be a good candidate for a second multimeter, especially if you travel and want or need to take a device with you.<\/p>\n","_en_post_name":"","_en_post_excerpt":"","_en_post_title":"Review: Zoyi ZT-300AB Multimeter","edit_language":"en","footnotes":""},"categories":[123,47,62,120],"tags":[124,43,59,121,132,125],"class_list":["post-1722","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-analisis","category-electricidad","category-electronica","category-metrologia","tag-analisis","tag-electricidad","tag-electronica","tag-multimetro","tag-multimetros","tag-review"],"ninja_gutenberg_blocks_featured_media_urls":{"thumbnail":["https:\/\/lab.fawno.com\/wp-content\/uploads\/2021\/04\/MG_7298-150x150.jpg",150,150,true],"ninja_gutenberg_blocks_landscape_large":["https:\/\/lab.fawno.com\/wp-content\/uploads\/2021\/04\/MG_7298-1200x800.jpg",1200,800,true],"ninja_gutenberg_blocks_portrait_large":["https:\/\/lab.fawno.com\/wp-content\/uploads\/2021\/04\/MG_7298-1200x1800.jpg",1200,1800,true],"ninja_gutenberg_blocks_square_large":["https:\/\/lab.fawno.com\/wp-content\/uploads\/2021\/04\/MG_7298-1200x1200.jpg",1200,1200,true],"ninja_gutenberg_blocks_landscape":["https:\/\/lab.fawno.com\/wp-content\/uploads\/2021\/04\/MG_7298-600x400.jpg",600,400,true],"ninja_gutenberg_blocks_portrait":["https:\/\/lab.fawno.com\/wp-content\/uploads\/2021\/04\/MG_7298-600x900.jpg",600,900,true],"ninja_gutenberg_blocks_square":["https:\/\/lab.fawno.com\/wp-content\/uploads\/2021\/04\/MG_7298-600x600.jpg",600,600,true],"full":["https:\/\/lab.fawno.com\/wp-content\/uploads\/2021\/04\/MG_7298-scaled.jpg",1707,2560,false]},"_links":{"self":[{"href":"https:\/\/lab.fawno.com\/en\/wp-json\/wp\/v2\/posts\/1722","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lab.fawno.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lab.fawno.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lab.fawno.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lab.fawno.com\/en\/wp-json\/wp\/v2\/comments?post=1722"}],"version-history":[{"count":19,"href":"https:\/\/lab.fawno.com\/en\/wp-json\/wp\/v2\/posts\/1722\/revisions"}],"predecessor-version":[{"id":1909,"href":"https:\/\/lab.fawno.com\/en\/wp-json\/wp\/v2\/posts\/1722\/revisions\/1909"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lab.fawno.com\/en\/wp-json\/wp\/v2\/media\/1738"}],"wp:attachment":[{"href":"https:\/\/lab.fawno.com\/en\/wp-json\/wp\/v2\/media?parent=1722"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lab.fawno.com\/en\/wp-json\/wp\/v2\/categories?post=1722"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lab.fawno.com\/en\/wp-json\/wp\/v2\/tags?post=1722"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}