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EEVBlog 121GW Multimeter Firmware Details

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pppopol:
Are you sure it's V2.04? On the website is V2.02?

Brumby:
Dave provided v2.04 a few weeks ago: HERE

ceut:

--- Quote from: Kibabalu on March 05, 2020, 07:12:32 am ---Just received my 121GW with firmware version 2.04. No issues discovered so far during first day of use.

--- End quote ---

Hello,
How fast is it in voltage mesurement with this new firmware for example with a lab power supply ?
Is there some lag when changing range ?

Thanks !

dougg:
These results were obtained with a recently delivered 121GW running upgraded 2.04 firmware** and an Agilent U8001A power supply. I was pressing the "Output On/Off" button with the voltage set to 20 Volts (1 Amp current limit). When pressing "On" the meter's digital readout blanks in most cases and just after 1 second displays 19.992 volts. The indicator bar goes fully to the right then drops back to the correct position in probably 1/3 second. Once in a while a voltage in the 8 to 9 volt range pops up momentarily before showing the correct voltage. Pretty well the same thing happens in reverse when I press the "Off" button, but it is more likely to show a lower voltage momentarily and the bar indicator drops to zero more or less immediately. The ambient temperature was around 17C .

** Somewhat worryingly the meter was delivered with 2.01 firmware which is listed in the manual as "do no use".

dougg:
Plus I would guesstimate a similar 1 second delay while the digital readout was blank when pressing the Range button on the 121GW. One range indicated overflow (the press after showing "20.0"). The bar indication moved promptly.

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