3D TRASAR
5500 - Installation & Operation Manual
521-OM0108.88
Copyright
2009 Nalco Company
Technical Help
(630) 305-CHEM
I-1
Appendix I: Halogen Analyzer
Control Through an Analog Input
The latest
OBC firmware update and respective Configurator
updates now provide for the use of an
online halogen analyzer, which helps maintain the residual concentration at a set point. The halogen
analyzer monitors the total or free halogen residual. The output of the halogen analyzer can be used
to control the oxidant feed pump in place of ORP-control oxidant feed. This is accomplished auto-
matically through the Configurator.
Analog Input Selection Screen
Wire the analog output of
the halogen analyzer to
either of the two Analog
Inputs of the OBC. Using
the Configurator, set-up the
analog inputs to use the
halogen analyzer. The
halogen analyzer can be
used to monitor or control
total or free residual halo-
gen (TRH/FRH) levels in
the system. When the
halogen analyzer is used to
control the residual halogen
level in the system, the
oxidant feed pump is
controlled by the OBC
based on set-point control
using the signal from the
halogen analyzer.
