User Manual

Commissioning
Part No.: 4417.762_Rev07 SmartRadar FlexLine
Service Manual 6 - 151
6.11 Average Temperature Measurement (FII-RTD)
6.11.1 Introduction
The Field Interface Instrument - Resistance Temperature Detector (FII-
RTD) board is a sensor module for the instrument (gauge) and
calculates average product- , vapour- and ambient temperatures.
For realizing this, RTDs or MRTs must be directly connected to the FII-
RTD module.
ESF09-0008
FIGURE 6-40 The FII-RTD board
There are 4 possible configurations:
 1 or 2 RTDs in a 3-wire configuration
 1 or 2 RTDs in 4-wire configuration
 2 till 6 RTDs as a probe, called MPT, and which has 1 wire per RTD +
2 common wires for all RTDs
 2 till 6 MRTs as a probe, and which has 1 wire per MRT + 2 common
wires for all MRTs
NOTE: Only in RTD 3- or 4-wire configurations ambient
temperature calculation is possible.
LE1
LE2LE3
planar
transformer