Hi,

I'm having some problems with my DT800, because in the laboratory I worked and I made some tests with it and everything is fine.

"TEST" command said "PASS" and everything, no problems at all, but when I place it on a structure (a train bridge), that I'm monitoring, and I send the program, the DT800 shut down, death, all lights gone, and I can't connect it anymore, don't respond.

I use 12V supply and i tried too with external battery (12v too) and it happen again. Then back into the lab it works again like nothing happen. Can you help me? What's the cause for that happen?

Thanks

Good morning Claudio,

This looks like either a power supply problem or a ground loop.

1. Power supply
   Please make sure the power supply is not a switch mode device and when you use a battery you have a good ground connection.

2. Ground loop.
   When the logger is in the train does it power up with all the sensors disconnected? If it does then connect sensor one at a time until the problem occurs again. You might need to isolate some of the sensors from the logger.

Cheers,
Roger