Technical Bulletin 93 - Loss of Level and Temperature Readings on LevelMaster Product
To describe a situation encountered with a small quantity of level sensors using active floats (mode 2). This situation does not exist with passive float systems. This bulletin will describe the potential problem and recommended corrective action.
In an effort to improve the reliability of the LevelMaster product, a modification has been made to the RS-485 communications circuit (electronic board part number 2018546-003). The improvement involved the addition of and changing out of some parts on the board to reconfigure the RS-485 circuit from DC to AC coupled.