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OWON XDM1041 the unknown multimeter...

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Kleinstein:
Battery operation has its advantage: no power cable needed and better isolation / less common mode signal injection to worry about. Even if the possible injection of a common mode signal is not often a problem it helps if you don't have to consider this as a possible source of an unexpected signal.
With the moderate power consumption operation on a rechargible battery and still have a well visible screen is nice.  Keithley / Fluke had early 4.5 digit bench top meters with battery option, so it is not a new invention.

mapleLC:

--- Quote from: Kleinstein on May 16, 2022, 01:09:31 pm ---Battery operation has its advantage: no power cable needed and better isolation / less common mode signal injection to worry about. Even if the possible injection of a common mode signal is not often a problem it helps if you don't have to consider this as a possible source of an unexpected signal.
With the moderate power consumption operation on a rechargible battery and still have a well visible screen is nice.  Keithley / Fluke had early 4.5 digit bench top meters with battery option, so it is not a new invention.

--- End quote ---


--- Quote from: Johnny B Good on May 16, 2022, 12:53:28 pm --- Consumer demand?  ::)

--- End quote ---

I'm one of those consumers that demands a bit more reputation, so this is my old workhorse.  While reputation is on the decline, period specific, reputation still matters.

I wouldn't trade mine for yours.

akisnas:
Hello everyone, i bought 2 of them a few months before, tested and then storage in original boxes for 2 -3 months before my project started.
Today unpackage and i test them, both of them were dead no powered at all.
I notice the psu is working and 5V is present, have you any idea what is going on?
Is there any member with the same issue?
The rechargeable battery MS621FE measured at 2.6V.
Do you think there is an issue with this battery?
Its really weird...
Thanks for your time.
Best Regards

akisnas:
Problem solved, after 10mins the battery charged and its working again. :)

sigxcpu:
I will leave this information here, for all others that may be hit by my problem.

I've tried to use the utility & firmware provided here https://github.com/TheHWcave/OWON-XDM1041/tree/main/OWON%20firmware , but the meter didn't exit bootloader/restart - finished with error at "checking new version".
I tried to re-flash lots of times with the same result.

Diode/continuity was broken (showing 0 and beeping continuously), "Utility" menu was also broken. Most likely the "calibration" data was corrupted.
I wrote to Owon but I didn't get any response yet, then I've found this repository https://github.com/PetteriAimonen/owon-xdm2041-info/tree/main/bootloader and a crazy idea was born. What if I write the calibration data from 2041 (thank you PetteriAimonen) to my 1041?
To my surprise, it worked, the meter is fully functional again and, based on few tests I did, accurate enough.

Of course, now it thinks it is a 2041 on version 1.7.2 (the actual version is 2.1.2), but I can live with that.

Attached a picture with the broken "utility" menu.

LE: If somebody would be kind enough to dump the calibration data from their 1041, I would be forever thankful :)
The script to do that is here https://github.com/PetteriAimonen/owon-xdm2041-info/blob/main/bootloader/backup_calibration.py

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