Haha, I also got the machine gun experience with the pc-link software I downloaded from the Velleman webpage. But in some way this is good! This message only pops up when an unexpected data package is read from the COM port, meaning you received data from the multimeter Also the fact that you saw data in Realterm is promising. Although it is strange you only saw one sequence. Did you installed the version of Realterm I posted in my last post?
Anyway the first character of each hex digits is ascending. So 1x 2x 3x … 8x 9x and then the pattern repeats itself, the x represents some varying value between 0 and 9 or A and F. So my data sequence goes up to 9x while I found that some people’s multimeter only go up to 8x ( gist.github.com/m0n5t3r/4543215 see this website where somebody wrote a Python script to read out the multimeter without the PC-LINK software, I’m a programmer so I adjusted some things, but it didn’t work for me). So the reason the PC-LINK program starts firing this error messages is probably because it expects a sequence of data from 1x up to 8x. I guess the PC-LINK 6000 Software expects up to 9x and is therefore working for me.
So I just came home and did some testing to confirm my assumption: I started the pc-link software, I downloaded from the Velleman website. Then I selected the correct COM port and pressed start. The multimeter wasn’t connected yet. Now I connected the multimeter, still no error messages. Immediately when I enabled the pc-link mode on my multimeter, error messages started to pop up. Now I pressed as quick as I could the ‘Hold’ button on my multimeter. Now the error popup windows stopped firing. When I pressed hold again the machine gun continuous. So this kind of concludes my assumption. Good news for you because you indeed receives data.
I didn’t realize the PC-LINK 6000 software scans for the correct COM port automatically but yes indeed it does. It starts searching for the COM port after you press ‘Start’. At the bottom on the left side of your program window, you should see the text “stop” which changes into “detecting” when you press ‘start’. The field next to this text indicates the COM port. It changes from 1 to 10 and then from 1 to 10 again. Sometimes it doesn’t find my multimeter and I need to repress ‘start’ for 3 times (at least that was the max numbers of tries before it finally connected). When the software finds the multimeter the “detecting” field will change into “linking”. Data will appear and a line is plotted in the graph. What works best for me is this order: First insert the cable in the pc and in the multimeter. Next, I enable the multimeter and set it in pc-link mode. At last, I start the pc-link 6000 software and press ‘start’. Only in this order, the software seems to find my multimeter most of the times after one try.
I really hope this works for you.