In-Situ Light Tower Alarm Kit for the Con TROLL PRO System - Manual (Page 5)

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Programming Sequence
On the Con TROLL PRO, select Menu, Settings, Outputs, Relays, Relay 1.
Enable the relay.
Mode = Low Alarm
Parameter = A-Concentration
Setpoint = 4 mg/L
Deadband = 0.2 mg/L (This value is recommended to prevent relay chatter.)
Adjust the Setpoint and Deadband to optimize aerator
performance and minimize aerator cycling.
Configuring a Single-Parameter Light and Audible Alarm
In this scenario, the Con TROLL PRO monitors a tank using an RDO PRO Probe or
RDO PRO-X Probe. The Con TROLL PRO turns on an aerator when the DO
concentration falls below 4 mg/L.
The light tower shows green when the DO is above 4 mg/L (aerator off), yellow when
the DO is below 4 mg/L but above 3 mg/L (aerator on), or red when the DO is below 3
mg/L (aerator on). As an option, the audible alarm can turn on when the red light turns
on.
The RDO PRO Probe is wired as Probe A. Relay 1 is used to implement the control
function, Relay 2 is used to implement the alarm function.
You can add an external switch in the gray wire that will allow you
to turn off the audible alarm when you service the system.