Instruction manual

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Relay Control Mode
Click on the arrow of the pull down menu and select the way that you want to control the relay.
See Section 6.2 for details on each control mode.
Sys. Cond. Input Assignment
Click on the arrow of the pull down menu to select the conductivity sensor that is installed in the
cooling tower water.
Makeup Cond. Input Assignment
Click on the arrow of the pull down menu to select the conductivity sensor that is installed in the
makeup water.
System Conductivity
This is a display of the current cooling tower system water conductivity as measured by the
assigned sensor.
Makeup Conductivity
This is a display of the current makeup water conductivity as measured by the assigned sensor
Measured Cycles
This is a display of the current ratio of system conductivity to makeup conductivity.
Status
This displays the current status of the relay output, either “Off” or “On”, and if on, the amount of
time it has been on. Possible status messages are Off, Off/Manual, On/Time counting down and
On/Time counting down/Hand (for manual activation). The only possible error messages are
Interlock, Timeout and Sensor Error. See section 8.1 for a complete description of error messages.
Custom Name
This menu allows you to call the output another name if desired. Type the new name in the text
box.
Cycles Dead Band
Type in the desired dead band. See Cycles Set Point below.
Cycles Set Point
Type in the desired set point value. The control direction is always a High set point, so if the
measured cycles exceeds the set point, the relay will activate until the measured cycles is less than
the set point minus dead band.
Cycles Low/High Alarm
Type in the desired alarm points.