Rosemount Annubar Gas Flowmeter is installed on flow line and HART signal is connected to HMI. Currently we need to connect an external digital display from this annubar to an office (cable length from Annubar to display is almost 1000 FT). As recommended by Rosemount, current loop is made by connecting with TEST and +ve terminal of Annubar. Digital display is 220VAC powered, and Annubar is self powered from PLC. The loop connected to Digital display showing 0.7VDC and mA current drops when digital display is connected (showing less reading). How to rectify?