Before I Trust the Numbers - Comparing Three USB Testers (Tenma 72-13540, FNIRSI FB58, Keweisi KWS-10VA Before Characterizing the FNIRSI DPS-150/technologies/test-and-measurement/b/blog/posts/before-i-trust-the-numbers---comparing-three-usb-testers-tenma-72-13540-fnirsi-fb58-keweisi-kws-10va-before-characterizing-the-fnirsi-dps-150Comparing Three USB Testers Before Characterizing the FNIRSI DPS-150 Why I Did This Test I recently added a FNIRSI FNB58 USB tester to the bench with the intention of using it during my characterization of the FNIRSI DPS-150. Before I started trustien-USTelligent Community 12RE: Before I Trust the Numbers - Comparing Three USB Testers (Tenma 72-13540, FNIRSI FB58, Keweisi KWS-10VA Before Characterizing the FNIRSI DPS-150https://community.element14.com/technologies/test-and-measurement/b/blog/posts/before-i-trust-the-numbers---comparing-three-usb-testers-tenma-72-13540-fnirsi-fb58-keweisi-kws-10va-before-characterizing-the-fnirsi-dps-150Wed, 26 Aug 2026 00:25:26 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:96c6af49-1e1f-43c2-b2e3-da26d250fa91DAB0<p>Very good post.</p><img src="https://community.element14.com/aggbug?PostID=30088&AppID=13&AppType=Weblog&ContentType=0" width="1" height="1">RE: Before I Trust the Numbers - Comparing Three USB Testers (Tenma 72-13540, FNIRSI FB58, Keweisi KWS-10VA Before Characterizing the FNIRSI DPS-150https://community.element14.com/technologies/test-and-measurement/b/blog/posts/before-i-trust-the-numbers---comparing-three-usb-testers-tenma-72-13540-fnirsi-fb58-keweisi-kws-10va-before-characterizing-the-fnirsi-dps-150Tue, 25 Aug 2026 07:28:14 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:96c6af49-1e1f-43c2-b2e3-da26d250fa91Qbit0<p>Excellent testing methodology! It&rsquo;s easy to overlook meter burden and physical node differences during measurement, so using the dual-point fixture to verify the baseline first was a great approach. That LED test really proved the value of the FNB58 for low-current detection.</p><img src="https://community.element14.com/aggbug?PostID=30088&AppID=13&AppType=Weblog&ContentType=0" width="1" height="1">RE: Before I Trust the Numbers - Comparing Three USB Testers (Tenma 72-13540, FNIRSI FB58, Keweisi KWS-10VA Before Characterizing the FNIRSI DPS-150https://community.element14.com/technologies/test-and-measurement/b/blog/posts/before-i-trust-the-numbers---comparing-three-usb-testers-tenma-72-13540-fnirsi-fb58-keweisi-kws-10va-before-characterizing-the-fnirsi-dps-150Mon, 24 Aug 2026 14:15:19 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:96c6af49-1e1f-43c2-b2e3-da26d250fa91obones0<p>Woah, quite a dedication to finding the proper voltage and current!</p><img src="https://community.element14.com/aggbug?PostID=30088&AppID=13&AppType=Weblog&ContentType=0" width="1" height="1">