Siemens EF 887 Series - User Manual
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Water Technologies
Strantrol® 887 HRR®
Control System
Product Data Sheet
Benefits of the Strantrol® 887
Controller Include:
•
Accurate and Reliable Redox Control
•
Optional Sensor Wash and Flow
Switch for Peak Performance and
Safety
•
User-Programmable Feed Modes to
Meet Application Needs
The second relay can be configured to control a second
feeder at an alternative setpoint, or to perform an auto-
matic sensor wash function.
The third relay can be set as a master alarm reporting
high, low, or overfeed conditions.
The unit’s (4) 4-20mA outputs may be used for direct
data recording or transmitting data to a computer or
distributed control system.
Additionally, the Strantrol® 887 controller provides an
external interrupt to accept a signal from a timer or sam-
ple stream flow switch, and a triggered input to accept a
signal from a contacting water meter.
Description
The Strantrol
®
887 High Resolution Redox
®
control system
dramatically improves disinfection monitoring and control
in industrial process and cooling water applications.
Comprised of our industry leading sensor technology,
innovative sample flowcell, unique control algorithms,
and on-site service and support, the Strantrol® 887
controller is the benchmark for ORP monitoring and
control worldwide.
Each unit is equipped with three relays that can be
configured in any combination for control, alarm or
sensor wash.
In a typical installation, the first relay is set to On/Off or
Time-Based Proportional (TBP) control. Time-Based
Proportional control enables simple chemical feeders to
mimic the accuracy of more complex PID control.
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