Dave shows why Uni-T multimeters generally suck in this teardown (and a little bit of a review) of the $180 UT71E 0.025% accuracy multimeter with power measurement capability.<br />He also opens the UT71A, UT61E, and compares the input protection and rating with a Brymen BM257.<br /><br />http://uni-trend.com/UT71E.html<br />MAX6190 Voltage Reference: http://datasheets.maximintegrated.com/en/ds/MAX6190-MAX6198.pdf<br />OP1177 Opamp: http://www.analog.com/static/imported-files/data_sheets/OP1177_2177_4177.pdf<br />Cyrustek ES51922 DMM chipset: http://www.cyrustek.com.tw/spec/ES51922.pdf<br />Holtek HT1621 LCD driver: http://www.ywslcm.com/Upload/tbDownload/2013-4-13_9_37_49.pdf<br />AD636 True RMS Converter chip: http://www.analog.com/static/imported-files/data_sheets/AD636.pdf<br /><br />Forum: http://www.eevblog.com/forum/blog/eevblog-712-uni-t-ut71e-multimeter-(why-uni-t-meters-suck)/<br /><br />EEVblog Main Web Site: http://www.eevblog.com<br />The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2<br /><br />Support the EEVblog through Patreon!<br />http://www.patreon.com/eevblog<br /><br />EEVblog Amazon Store (Dave gets a cut):<br />http://astore.amazon.com/eevblogstore-20<br />Donations:<br />http://www.eevblog.com/donations/<br />Projects:<br />http://www.eevblog.com/projects/<br />Electronics Info Wiki:<br />http://www.eevblog.com/wiki/
