I've purchased several (8) of your USB-1808X and have been very happy with the performance.....until just the other day. In the middle of troubleshooting a small voltage compare circuit (our 3rd use of this) the analog output apparently went from 0.1V (whichi s what our code was driving it to - OK) to -11.5V! The mode was 0-10V. We could not figure out what happen for the life of us. So, before we rewired another USB-1808X in, we simply plugged in another one (right out of the box) with nothing at all attached and we got our 0.1V (which we moved about 0-10V) and all seemed good, checked our other DAC out along with ADC inputs...but when we went back to double check out original analog out it is now stuck at -4.5V! Power cycled, etc. Not sure what we can do from here. We still have a couple in the sealed box and are afraid to even plug these in as they are not cheap and take months to get.
We certainly have ESD safe enviroment along with DMM that are only measuring V's. Not sure how this could harm and now we are worried about the previous ones we have already sent out - though they have been in operation for over a year now.
Please help where we can go from here and perhaps other things we can do to troubleshoot. Thanks, SSS
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SSS
Hello,
I've purchased several (8) of your USB-1808X and have been very happy with the performance.....until just the other day. In the middle of troubleshooting a small voltage compare circuit (our 3rd use of this) the analog output apparently went from 0.1V (whichi s what our code was driving it to - OK) to -11.5V! The mode was 0-10V. We could not figure out what happen for the life of us. So, before we rewired another USB-1808X in, we simply plugged in another one (right out of the box) with nothing at all attached and we got our 0.1V (which we moved about 0-10V) and all seemed good, checked our other DAC out along with ADC inputs...but when we went back to double check out original analog out it is now stuck at -4.5V! Power cycled, etc. Not sure what we can do from here. We still have a couple in the sealed box and are afraid to even plug these in as they are not cheap and take months to get.
We certainly have ESD safe enviroment along with DMM that are only measuring V's. Not sure how this could harm and now we are worried about the previous ones we have already sent out - though they have been in operation for over a year now.
Please help where we can go from here and perhaps other things we can do to troubleshoot. Thanks, SSS
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