Problems in GWR level transmitter

i have two E&H FMP54 type GWR level transmitter on stream is used for controlling (FF) and another one is used as tripping transmitter (HART) which is conneted on ESD system… when the level goes above 100%… HART transmitter hold at 103.4% but FF transmitter system jump to 65-70%… what is the reason for this…?

20.5mA? For LT -HART.

Please check parameters on LT in FF and compare with Hart one… in case if you have PRM it is easy…

Signal DB is good.

Mapping unknown… Known.

If possible, please clean probes or cones…

HART Instrument in ESD loop are SIL rated it will not fail or rare than FF transmitter LT