Section 2
2.12 Element Monitors
The Element Monitoring system consists of a panel of 6-channel circuit boards which detect the location of
a failed heating element. The circuit boards monitor the current to the lamps and activate an audible alarm
and visible alarm upon sensing an element failure. The display shows the specific location of the lamp or
lamp string (multiple lamps wired in series make up a string) containing the failed lamp. The audible alarm
alerts the operator immediately if a lamp fails and allows him to discern its location and determine if process
results will be appreciably affected.
Access the Monitor screen in the software to view the status of the heating element strings. Click on the
Serial EM Test button to determine if all boards are communicating properly with the PLC controller. Each
board contains a dip switch which determines the digital address of a given board and the software checks
each board in sequence. Boards are addressed from 0 to nn. Communication failure or individual lamp
failure of itself will not shut down the process. The process will only shut down if a lamp failure adversely
impacts the furnace ability to maintain set point temperatures.
Figure 2.12.1 Element Monitor screen
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LA-309 Owner’s Manual
Содержание LA-309
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