Comments on: What is low Z on multimeter? https://www.epanorama.net/blog/2023/06/28/what-is-low-z-on-multimeter/ All about electronics and circuit design Thu, 16 Apr 2026 09:52:49 +0000 hourly 1 http://wordpress.org/?v=3.9.14 By: Tomi Engdahl https://www.epanorama.net/blog/2023/06/28/what-is-low-z-on-multimeter/comment-page-1/#comment-1826553 Mon, 29 Apr 2024 08:13:05 +0000 https://www.epanorama.net/newepa/?p=193892#comment-1826553 Fluke 117 has loZ auto measurement mode

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]]> By: Tomi Engdahl https://www.epanorama.net/blog/2023/06/28/what-is-low-z-on-multimeter/comment-page-1/#comment-1807296 Sat, 01 Jul 2023 16:39:12 +0000 https://www.epanorama.net/newepa/?p=193892#comment-1807296 In my testing UT20B in AC 300V mode has AC impedance of around 1 megaohms (0.26 mA current at 233V AC). The DC impedance seems to be practically infinitely (suspect that there is series capacitance in meter).

]]> By: Tomi Engdahl https://www.epanorama.net/blog/2023/06/28/what-is-low-z-on-multimeter/comment-page-1/#comment-1807037 Thu, 29 Jun 2023 08:27:00 +0000 https://www.epanorama.net/newepa/?p=193892#comment-1807037 UT20B multimeter
https://www.tme.eu/en/details/ut20b/portable-digital-multimeters/uni-t/
Manual
https://www.manua.ls/uni-t/ut20b/manual?p=25

AC input:
Approximately 0.5 megaohms input impedance

Square wave output:
Frequency output approx 50 Hz
Simple signal source with 47 kohms resistance output
Output voltage around 3 Vpp to 1 megaohm impedance
Do not allow output terminals to reach higher than 10V

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