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EEVblog => EEVblog Specific => Topic started by: adidav on July 10, 2011, 05:46:48 am

Title: tenma oscilloscope 72-8225
Post by: adidav on July 10, 2011, 05:46:48 am

Hi Dave,

I saw on Youtube your movies and are great. After that I thing you can be the one who can help me with my oscilloscope.
One year ago I bought a Tenma oscilloscope (model 72-8225, 40MHz) from Farnell. Till now it work very fine but the firmware has some glitches. So I decide to do an upgrade to the firmware, but I couldn't find anything about this over the internet, not even the company Tenma.

Thank you very much.

Best Regards,
ADi

Title: Re: tenma oscilloscope 72-8225
Post by: gregariz on July 10, 2011, 06:34:57 am

I think farnel are selling UNI-T's maybe?

http://uni-trend.com/UTD2042C.html (http://uni-trend.com/UTD2042C.html)

Title: Re: tenma oscilloscope 72-8225
Post by: Bored@Work on July 10, 2011, 06:42:13 am

Tenma is not a real company. Tenma is a brand of Farnell. For whatever reasons Farnell sometimes feels the need to play a smoke and mirror game and slap their Tenam sticker on OEM equipment.

Your 72-8225 is an older UNI-T, likely a UTD2042C, with a Tenam sticker, in a grey/white case instead of UNI-T's typical red/black and maybe some other cosmetic changes like changed screen messages, and a manual where they did a 'search and replace' of UNI-T with Tenma.

Unfortunately, UNI-T is not known to be forthcoming with firmware updates. You could of course try. And you could also try Farnell.

Title: Re: tenma oscilloscope 72-8225
Post by: FreeThinker on July 10, 2011, 04:50:01 pm

Quote from: BoredAtWork on July 10, 2011, 06:42:13 am

Tenma is not a real company. Tenma is a brand of Farnell. For whatever reasons Farnell sometimes feels the need to play a smoke and mirror game and slap their Tenam sticker on OEM equipment.

Your 72-8225 is an older UNI-T, likely a UTD2042C, with a Tenam sticker, in a grey/white case instead of UNI-T's typical red/black and maybe some other cosmetic changes like changed screen messages, and a manual where they did a 'search and replace' of UNI-T with Tenma.

Unfortunately, UNI-T is not known to be forthcoming with firmware updates. You could of course try. And you could also try Farnell.

RS plays the same silly game with it's Isotech range. Most annoying!

Title: Re: tenma oscilloscope 72-8225
Post by: adidav on July 10, 2011, 06:19:08 pm

Thank you very much for replays.  Now I understand why I don't find anything about Tenma. 

But if anyone can give more information about my oscilloscope. I saw the oscilloscope 40 , 60 and 100MHz had the same samples 500MS/s. I think is  the hardware is the same but the firmware is different. Perhaps the firmware from one of this can be suitable for mine.