Products > Test Equipment
EEVBlog 121GW Discussion thread
v81:
--- Quote from: bicycleguy on January 27, 2022, 05:12:18 pm ---v81,
Since this may become an issue I'll start. SN EEVBlog 001421 is ok.
--- End quote ---
There were 2 x 121GW's in the order, have checked the second one since my last post and it's OK.
Could be just a one off.
Does this have issues using the full or at least close to the full capacity of NiMH cells?
Wonder if there would be any value in doing a 2x 14500 Lithium ion powered multimeter? Rechargeable and more voltage to play with at the same time.
bicycleguy:
The issue isn't the full capacity of NiMH which only manage to get to about 5.9V with the four in series immediately after charging. Within a few days it drops to approx 5.5 volts, then gradually drops to 5V over ~4 months of use. The meter will continue to work properly below 5V but that isn't good for the NiMH to go much below 1.25V assuming they are all even and I remember to check them.
Earlier in this thread people talk about mods or not for Li-whatever. They have the high side issue. I don't think their worth the cost or hassle.
v81:
Right, i had the impression the meter might not be able to use all of the useful capacity of the NiMH.
Sounds now more of a concern for over discharge.
An alternative firmware with an alert or shutdown for 4.8v might be nice.
zega:
How about little feature for next FW update?
VCO!
Many times i was not able to look at screen but need to tune something to the maximum value without being able to look at the screen!
So to have piezo inside multimeter producing sound that would change frequency with value change (i .e. voltage goes up, frequency as tone pitch goes up)
That way you can hook up multimeter to measure certain value, and while you are away, multimeter produces tone that pitches up or down while you are adjusting something, also resetting with delta function can set "new start" or create baseline pitch that will be your baseline (440Hz? idk).
Basically Like voltage controlled oscillator (VCO)!
It would be best to tie that to fast barograph display, or what I'm trying to say, the faster the better!
What is the opinion on this one? :popcorn:
e0ne199:
--- Quote from: zega on February 09, 2022, 06:08:46 pm ---How about little feature for next FW update?
VCO!
Many times i was not able to look at screen but need to tune something to the maximum value without being able to look at the screen!
So to have piezo inside multimeter producing sound that would change frequency with value change (i .e. voltage goes up, frequency as tone pitch goes up)
That way you can hook up multimeter to measure certain value, and while you are away, multimeter produces tone that pitches up or down while you are adjusting something, also resetting with delta function can set "new start" or create baseline pitch that will be your baseline (440Hz? idk).
Basically Like voltage controlled oscillator (VCO)!
It would be best to tie that to fast barograph display, or what I'm trying to say, the faster the better!
What is the opinion on this one? :popcorn:
--- End quote ---
nah...the thing that needs real fixing here is the bug on VA mode bargraph...whenever i switch the measurement range and switch to VA mode, the bargraph scale on VA mode just won't change at all and it really annoys me whenever i use VA mode for measuring things :-//
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