CALDON LEFM Ultrasonic M3P System

Overview

The CALDON LEFM Ultrasonic CheckPlus-M3P Electronic Unit measures feedwater mass flow to within 0.3% and temperature to within 0.6 °F (0.33 °C) when connected to the LEFM CheckPlus meter body for MUR applications. The LEFM CheckPlus-M3P Electronic Unit can be configured to monitor up to four feedwater pipes and provides centralized system integration and data output for all lines.

Designed as a direct functional replacement for the LEFM CheckPlus 2000FC and 2010M/AP1000 platforms, the CheckPlus-M3P electronics provides the same automatic set-up and continuous on-line verification capabilities that assure plant operators that the LEFM CheckPlus system is operating within its design basis. The M3P platform leverages G3 transmitter technology and marks a transition from CPU to PLC-based flow integration and plant communication output to vastly improve system reliability over prior generations.

The monolithic architecture houses all LEFM components in a single enclosure with front and rear panel door access to simplify diagnostics and maintenance activities. Components are organized in intuitive functional groupings with dual, redundant PLC and plant communications interface components allowing sites to access LEFM data over two parallel communication streams.

The M3P was designed to allow existing customers to upgrade from their obsolete 2000FC and 2010M/AP1000 electronics platforms seamlessly. The M3P maintains the same cabinet footprints and cable termination elevations to minimize modifications to accommodate the new system. Current LEFM CheckPlus users may also benefit by reusing their existing cables, transducers, and meters when upgrading their electronics. Additionally, the M3P’s plant communications protocol maintains backwards compatibility with prior generations.