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UNI-T UT61E Multimeter teardown photos.

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sachleen:
It does, a HE2321U

lagman:
I ran out of ideas regarding my problem with the RS232 adapter...
I'll give up for now unless you people have other ideas.

Thanks anyway for the help!  :)

Rick Law:


--- Quote from: lagman on December 29, 2013, 04:59:33 pm ---I ran out of ideas regarding my problem with the RS232 adapter...
I'll give up for now unless you people have other ideas.

Thanks anyway for the help!  :)

--- End quote ---

Lagman,

I suspect it is your RS232-USB convertor.  I had many problems with that when my UT61E was new.  The Rx light on the adaptor even blinks but the program doesn't read.  I tried a few different RS232-USB convertor and finally got a Sabrient with the FTDI chipset.  That cable was expensive ($17).

See this thread I wrote some time back:
https://www.eevblog.com/forum/testgear/ut-61e-rs232-usb-chipset-worked-and-chipset-that-failed/

Also, try to see first if the RS232 cable is working by connecting it to a "real" RS232 com port if you have an older machine with one.   This will rule out your UTE-to-RS232 part being the problem and we can focus on from RS232 to PC part.

Rick

dr_p:

--- Quote from: lagman on December 28, 2013, 03:24:44 pm ---This is weird...
I got it to work, I don't know how. Then I restarted windows without touching the DMM or the serial adapter and now it doesn't work anymore.
This looks like it's either a bad solder joint (but I don't think so as I didn't touch anything) or a windows/driver problem.

--- End quote ---
I have major software problems in connecting a OBD scanner for my car. It's USB to Serial, and shows as a COMx in Device Manager, but doesn't really work. As it turns out, Toshiba Bluetooth Stack keeps screwing up the COM ports, somehow. I made it work at some point, but I don't remember how. I used it for some time, all was good, worked every single time. Lost it after a restart (weeks later, because the laptop always went into standby). It's frustrating because I can't remember what the flick I did.

I suspect you might have the same software issues.

I will dig more into how COM ports are managed on a modern PC and possible causes for other people's (unrelated) equipment not working on serial-over-USB.

lagman:
Thanks for your reply. I'll take a look into other RS232 to USB converters.

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