Instruction manual

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Status
This displays the current status of the Relay Output, either “Off” or “On”, and if on, the time it has
been on and any alarm conditions. Possible status messages are Off, Off/manual, On/Time
counting down, Off/Time counting down or On/Time counting down/Hand (for manual relay
activation). Possible error messages are Timeout, Interlock, or Pump Failure. 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.
Target PPM
Type in the text box the desired PPM set point for the product.
Unit Volume to Trigger Output
Type in the text box the volume of solution that needs to enter the system in order to trigger the
feed.
Specific Gravity of Chemical Fed
Type in the text box the specific gravity of the product being fed.
Pump Flow Rate
Type in the text box the flow rate of the pump used to feed the product. For the best accuracy, the
flow rate should be measured using a draw down cylinder with the pump discharge into normal
system pressure.
Reset Timeout
(only appears if the Output Time Limit below has been exceeded)
There is a button called “Reset Timeout” which is used to reset the output if it has been activated
for longer than the time limit imposed in the “Output Time Limit” menu described below.
Mutual Interlocks
Click the check boxes to select or de-select the relays and analog output control outputs that you
want to be prevented from turning ON if this output relay is already ON. If you do not need any
other output to shut off when this relay turns on, UNCHECK all boxes. The selection is mutually
exclusive, meaning that if Relay 2 has Relay 4 interlocked, then R2 won’t turn on if R4 is already
on, and R4 won’t turn on if R2 is already on. This feature should be used with caution since it can
potentially delay a chemical addition for a long time.
Output Time Limit
Type in the text box the maximum amount of time that the relay can be continuously activated
before the controller deactivates the relay and activates an Output Time Limit alarm. This is
intended to prevent the output from running out of control if the input fails in such a way that it
will never deactivate the relay.
Note that the relay will not activate again until someone resets the timer!