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EEVBlog 121GW Multimeter Firmware Details

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cmumford:
I also upgraded to 1.51, but didn't use the meter post upgrade. I'd love to know if I should downgrade.

gdewitte:
And now 1.52 is out there. Could someone please give us an update?

GeoffreyF:
Being of an empirical and somewhat adventurous nature, I decided to install the firmware labeled 1_52.  The meter started back up just fine but comedy ensued, the firmware revision is reported as 1_53.  I checked this several times lest my eyes deceived me.  1_53. I suppose I can state the result is better than expected, at least numerically.

Cursory examination, the meter seems OK.  I'm still wondering if, after 1_51, it's still calibrated. but I think it is.  I'd like a way to verify that - what a "bricked calibration" looks like is not what mine looks like.  I'm thinking that the incident that initiated pulling 1_51 was fairly anomalous but can we get confirmation?


CDaniel:
I installed v1.52 , so far I see a big improvement in reducing the 50Hz noise in resistance mode , now when measuring Mohm resistors you can touch the probes and cables .
The beep sound in diode mode is still laggy ...

GeoffreyF:

--- Quote from: CDaniel on November 05, 2018, 11:35:14 pm ---I installed v1.52 , so far I see a big improvement in reducing the 50Hz noise in resistance mode , now when measuring Mohm resistors you can touch the probes and cables .
The beep sound in diode mode is still laggy ...

--- End quote ---

Did it report 1.53 when  when you first started it?  I think resistance resolution seems faster.  I don't think that beep is supposed to happen with all diodes.  Beep happens only when resistance is very low. It's responding to apparent continuity.

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