Author Topic: EEVBlog 121GW Multimeter Firmware Details  (Read 42924 times)

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Online HKJ

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Re: EEVBlog 121GW Multimeter Firmware Details
« Reply #225 on: December 10, 2018, 02:54:44 am »
It doesn't say no where about the 55mA limit on the mA jack!


Page 32: mA / μA Jack: This input jack is used for the 50 mA, 500 μA and 50 μA current ranges. It is 400 mA HRC fused. An input warning alert functions for this jack

But I am missing the 5mA range in that list.
« Last Edit: December 10, 2018, 03:00:04 am by HKJ »
 

Offline fboehle

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Re: EEVBlog 121GW Multimeter Firmware Details
« Reply #226 on: December 10, 2018, 03:01:06 am »
It is written on page 32 (File Version 04.12.2018)

"This input jack is used for the 50 mA, 500 µA and 50 μA current ranges

This input jack is used for the 10 A, 5 A and 500 mA current ranges. "

But yeah, a bit hidden...
...
I also see no one else has told me that and I have made a couple of posts about trying to feed 90mA into the mA jack so it can't be that obvious or well know or someone else would have said.
Thought you'd figure it out.  Didn't want to make you feel like an idiot :D 
Don't feel bad though, Iv'e done the same thing a few times but usually RTFM. |O

LOL... Nice one!  :)

I still haven't read the manual but someone posted saying they searched the newest revision of the manual and it doesn't mention it anywhere.
I haven't checked so I don't know if it says so or not, but i'll stick with the guy who says "it doesn't mention it anywhere", makes me feel a little less stupid!

Ha Ha!  :-+

So I went and read the latest updated manual for the 121GW today, dated 4th Dec 2018.

https://www.eevblog.com/wp-content/plugins/download-attachments/includes/download.php?id=19232

It doesn't say no where about the 55mA limit on the mA jack! It does however clearly say you should stick to alkaline and give lithium a miss.
I found it to be a good well set out manual and as someone who isn't so well experienced with these things as others here on the forum, I found it very easy to understand and get to grips with.
This meter really does have all the bells and whistles if you take the time to learn how to use it "properly" and understand all the features.

I did think "the meter" had a couple problems at first so that kind of put me off it. Turns out RTFM is very important indeed for this meter!

I stand corrected and the lithium mistake was mine but i still think the 55mA thing should be pointed out more obvious somewhere in the manual or even on the meter it's self as it is a rather neat niche function.

I will make the changes needed as set out in the manual and give it another chance as it seems one of the main the things I thought were wrong with the meter were actually my being naïve or mistake and not the meter.

I'll report back soon now I know how to operate it properly! I have a feeling I will be referring back to the manual a few times!  :)
 

Offline CDaniel

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Re: EEVBlog 121GW Multimeter Firmware Details
« Reply #227 on: December 10, 2018, 03:54:34 am »
It's unusual to have 500mA in the amps jack ( because of low burden ) , but on older multimeters is written " A 500mA " so you can see even if you didn't read the manual or you forgot .
I think they removed this on newer models , just " A " ... as in the picture from the manual .
« Last Edit: December 10, 2018, 03:56:58 am by CDaniel »
 

Online HKJ

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Re: EEVBlog 121GW Multimeter Firmware Details
« Reply #228 on: December 10, 2018, 04:05:38 am »
Now it is pointed out though I see it is a 50mA limit and not a "55mA limit" as someone else stated to start this whole thing.

The actual limit is 55mA, but in many multimeter specifications values are rounded down.
 

Offline n3mmr

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Re: EEVBlog 121GW Multimeter Firmware Details
« Reply #229 on: December 11, 2018, 12:13:46 am »
A question about logging:
Is it possible to log both frequency and voltage simultaneously in ac mode and automatic logging?
 

Offline bicycleguy

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Re: EEVBlog 121GW Multimeter Firmware Details
« Reply #230 on: December 11, 2018, 04:25:50 am »
A question about logging:
Is it possible to log both frequency and voltage simultaneously in ac mode and automatic logging?

yes

Code: [Select]
START 2018/12/10 10 21 24
ID 170800121
INTERVAL 10 sec
MAIN SUB-1 SUB-2 Remark
No. Func. Value Unit Func. Value Unit Func. Value Unit
1 ACV 0.0046 V FREQ. 0 Hz
2 ACV 0.0114 V FREQ. 0 Hz
3 ACV 0.0122 V FREQ. 0 Hz
4 ACV 0.027 V FREQ. 0 Hz
5 ACV 0.0413 V FREQ. 0 Hz
6 ACV 0.2659 V FREQ. 59.996 Hz
7 ACV 0.2724 V FREQ. 59.999 Hz
8 ACV 0.0245 V FREQ. 0 Hz
MAX 7 ACV 0.2724 V
MIN 1 ACV 0.0046 V
 

Offline n3mmr

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Re: EEVBlog 121GW Multimeter Firmware Details
« Reply #231 on: December 12, 2018, 09:15:22 pm »
A question about logging:
Is it possible to log both frequency and voltage simultaneously in ac mode and automatic logging?

yes

Code: [Select]
START 2018/12/10 10 21 24
ID 170800121
INTERVAL 10 sec
MAIN SUB-1 SUB-2 Remark
No. Func. Value Unit Func. Value Unit Func. Value Unit
1 ACV 0.0046 V FREQ. 0 Hz
2 ACV 0.0114 V FREQ. 0 Hz
3 ACV 0.0122 V FREQ. 0 Hz
4 ACV 0.027 V FREQ. 0 Hz
5 ACV 0.0413 V FREQ. 0 Hz
6 ACV 0.2659 V FREQ. 59.996 Hz
7 ACV 0.2724 V FREQ. 59.999 Hz
8 ACV 0.0245 V FREQ. 0 Hz
MAX 7 ACV 0.2724 V
MIN 1 ACV 0.0046 V

Could you then make the app plot voltage against frequency?
 

Offline EEVblog

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Re: EEVBlog 121GW Multimeter Firmware Details
« Reply #232 on: December 15, 2018, 11:47:05 pm »
Can you please take this overload talk elsewhere, this thread is for firmware stuff only. Thanks.
 
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Offline joeqsmith

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Re: EEVBlog 121GW Multimeter Firmware Details
« Reply #233 on: December 16, 2018, 02:10:27 am »
No problem.  I will clean up my mess.

About two pages cleaned up for you.   If others word do the same we could get it down even lower.
« Last Edit: December 16, 2018, 02:20:09 am by joeqsmith »
How electrically robust is your meter?? http://www.youtube.com/channel/UCsK99WXk9VhcghnAauTBsbg
 
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Offline jancumps

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Re: EEVBlog 121GW Multimeter Firmware Details
« Reply #234 on: January 09, 2019, 12:12:15 pm »
With the v1.58 beta, I can't get the min/max/avg to work.
Pressing the button changes the AUTO label on the display, but min/max/avg don't cycle anymore for me.
PEBKAC
« Last Edit: January 09, 2019, 12:43:44 pm by jancumps »
 


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