sgrobler Posted February 23, 2019 Share Posted February 23, 2019 As you can tell from, my spate of messages, I'm playing with my OpenLogger - discovered this problem today: I wanted to use one of the two DC power supplies. I set DCOUT1 to 1V and measured on the board with a multimeter. Nothing. Turned it off and set DCOUT2 to 1V and measured. Nothing. Left DCOUT2 set to 1V and measured on DCOUT1 and yes, 1V is there, but it shouldn't be So, DCOUT1 on the interface is not working at all. DCOUT2 on the interface incorrectly directs output to DCOUT1 on the hardware. Link to comment Share on other sites More sharing options...
JColvin Posted February 25, 2019 Share Posted February 25, 2019 Hi @sgrobler, I tested with the latest available firmware (0.1691.0) and this is working for me. I measured DCOUT1 (set to 1.324 V on the red wire) and DCOUT2 (set to -2.750 V on the green wire) and referenced a digital ground (black wire) and found them to be accurate within a few millivolts. I was able to measure the changes with WFL either streaming or not streaming. Are you measuring it in a similar way? What firmware are you using? Thanks, JColvin Link to comment Share on other sites More sharing options...
sgrobler Posted February 27, 2019 Author Share Posted February 27, 2019 I am using 0.1691.0. Instead of using the wires, I used the screw terminal adaptor. I was measuring between the DCOUT1 and GND terminal and between the DCOUT2 and GND terminals. If I pull off the screw terminal adapter and use the Red and Green DCOUT wires instead, then I get the correct measurements. So it looks to me like screw terminal adaptor is faulty. Can you check your screw terminal adaptor? Mine says rev B on it. Link to comment Share on other sites More sharing options...
JColvin Posted February 27, 2019 Share Posted February 27, 2019 Hi @sgrobler, I have a revA of the Screw Terminal Adapter rather than a rev B, but I am able to measure the expected voltages on either DCOUT. I wasn't able to see a difference in the schematics between Rev A and Rev B, but have asked what the change was between the two revisions. I imagine you already checked this, but in the interest of covering all of the bases, I presume you have attached the screw terminal adapter as shown in the images for it's associated reference manual? Thanks, JColvin Link to comment Share on other sites More sharing options...
sgrobler Posted February 28, 2019 Author Share Posted February 28, 2019 Yes, the screw terminal is connected as ist should be - directly over the main board. Link to comment Share on other sites More sharing options...
sgrobler Posted April 22, 2019 Author Share Posted April 22, 2019 Well, I have to retract what I said - @JColvin you were correct - it looks like I had the screw terminal shifted across by one pin, so it was not correctly mounted! Problem solved. Not sure how I missed that the first time! Link to comment Share on other sites More sharing options...
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