Connecting Veratron Flex 52 nmea guages to 2 x Safiery sensors on Fuel and water tanks

DIY
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Hi there, I am new to this. I have just fitted 2 Safiery pressure guages to my Miller Fifer 43ft Motor sailor one for fuel and one for water. They connect to a Tank 140 and then to the cerbo GX. I have installed the Victron connection to NMEA 2000 and converter cables from Raymarine to the two Veratron Flex 52 nmea guages. I have managed to get the Cerbo GX, Orca and the Raymarine Axiom pro to read the guages. The Cerbo and Orca were flawless, the Raymarine took some adjusting. I cannot get the guages to read. Apparently I need the fuel guage on instance 1 and the water on instance 2 (0 and 1 in nmea speak). But whilst the Cerbo gx sees the Veratron guages, the guages are not sending any data to them.