Service manual

MDS E-SCAN MONITOR INFORMATION
56
7.3 Features
• Continuously monitors both refractometers and associated equipment, looking at all vital
signals per unit to determine whether the displayed solids should be considered valid.
• Removes from service either refractometer whose associated signals do not meet a
prescribed tolerance. An alarm will actuate, identifying the refractometer and circuit at
fault. This feature greatly reduces the possibility of diverting unnecessarily due to a
malfunctioning refractometer when relying on one refractometer reading low solids to
divert.
• Configurable for divert when:
Either refractometer reads dissolved solids content 58% or below, an automatic divert
must take place or:
Both refractometers read solids 58% or below an automatic diversion must take place.
(Either of the above is in compliance with BLRBAC recommendations.)
• Provides failsafe monitoring of its own supply voltages. If a supply should fail, the
Monitor will display its malfunction and go out of service.
• A trending option is also available through software configuration. This will provide a
warning status that is triggered by an operator defined time constraint which acts as a
divert predict window. Based on a build-in rate of change algorithm, the Monitor can
determine whether or not a divert could occur within a specified time frame.
• All system errors, divert conditions, comparator and purge information are logged and
can be viewed and printed by the operator.
• Intelligent Purge Cycle
The measurement voltage is monitored in order to determine if the preceding prism wash
was successful. If unsuccessful another purge cycle will be automatically initiated. In the
case of three unsuccessful purge attempts, a purge error indicator is activated. In addition,
the intelligent purge will terminate as soon as the prism is clean, thus protecting the prism
from unnecessary purge action.