phuz
Member
Got a trouble call this AM from a customer saying they lost a level input. Looking at the input, I could see the signal was < 4mA, but not 0. Rescaling the channel engineering units to 4-20, I could see the input was a solid 3mA. They tried to feed 4-20 into the card, but no change. Moved to an open channel and all is well. What causes a channel to go into a state like that?