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| EEVBlog 121GW Multimeter Firmware Details |
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| alex-sh:
Anyone extensively tested 1.58 beta please? Any drawbacks? |
| bicycleguy:
Best yet, no regression AFAIK |
| Alex Rodriguez:
The burden voltage I think is a little off. Using a 25Ω/5W resistor in series with 12V DC, the 121GW shows 18.3mV burden voltage. The FLuke 28II connected in parallel to the voltage input of the 121GW shows 21.96mV. I followed page 41 burden voltage measurement instructions. Of course, there is no mention to use another DMM to confirm results. The 121GW current measurement is right on the spot. Firmware 1_58 beta |
| Candid:
You may have a look on this concerning burden voltage: https://www.eevblog.com/forum/testgear/eevblog-121gw-discussion-thread/msg2213955/#msg2213955 |
| Alex Rodriguez:
--- Quote from: Candid on February 25, 2019, 07:44:58 pm ---You may have a look on this concerning burden voltage: https://www.eevblog.com/forum/testgear/eevblog-121gw-discussion-thread/msg2213955/#msg2213955 --- End quote --- My friend, yes I watched your video, but I hate to tell you that you might have to re-do your video. Have you looked very carefully page 41 (121GW User Manual - Last Revised: 08 February 2019)? You are using mVA/VA, and that is for something else. To measure burden voltage, you must use mA or A. By the way, the mVA/VA is working just fine. Page 41 says: To measure the burden voltage an additional lead is required, this must be connected between the active current terminal and the voltage input, as shown below: |
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