At site we have flow indicator transmitter from ASA model C6 2600/47/H. It is a flow indicator transmitter for seal gas vent. The seal gas is in service there is a DP between the seal gas supply and balancing line of 1bar. The pressure of the vent is also of 1 bar, but the reading of the flow transmitter is 0. I was trying to configure the transmitter as from the instruction on the instruction manual but the function is not as indicated in the manual.