My FMR51 level Transmitter is showing signal quality no signal. i have done mapping, changed the DC Value, reset Power, change Full and empty Parameters but still no signal. what can i do differently? could it be that the device is bad?

 

There are diagnostic indicators in the transmitter’s digital display, symbols and characters, in addition to messages in the display.

Check out the diagnostics troubleshooting section of the manual starting on page 74.

https://portal.endress.com/wa001/dla/5000574/5162/000/04/BA01049FEN_0516.pdf

Check the mA output.

Is this a commissioning/start-up problem, or has it been working but then failed to work?