Instruction manual

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During Input Calibration
Click on the radio button to select how you want the analog output to react during calibration of
the input:
Remain Active: The Output % continues to respond to changes as normal.
Set Value: When the calibration begins the Output % is forced to the Input Cal Set Value (see
below). Normal response resumes once the calibration is complete.
Last Value: When the calibration begins the Output % is frozen at the last value calculated before
the calibration.
Normal response resumes once the calibration is complete.
Input Cal Set Value
Appears if the Set Value response is selected for During Input Calibration. Type the fixed output
% desired during calibration of the sensor inputs.
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 is already ON. If you do not need any other
output to shut off when this output 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 output can be continuously activated
before the controller deactivates the output (0% or 4 mA) 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 output. Any value between 0 and 1440 is acceptable. A value
of 0 means the output can be left on indefinitely.
Note that the output will not activate again until someone resets the timer!
It will take some experience to find out what the normal output on-time will be. If the output
cycles on and off under worst case conditions in 30 minutes, you may want to set the Output Time
Limit at 60 minutes.
Hand Time Limit
Type in the text box the maximum number of minutes that the output can be activated in the Hand
mode.
Output Mode
Click on the radio buttons to manually control the output. The normal selection will be Auto,
where the controller uses the various set points to modulate the output. You can force the output to
a specific % regardless of the set points by selecting Hand, or force the output off (0%, or 4 mA)
regardless of the set points by selecting Off.
If you select Off, the output will not respond again until either Hand or Auto is selected (or if
power is cycled)! If you select Hand, the output will at a specific value (see Hand Mode Setting
below) until either Auto or Off is selected, or until the Hand Time Limit (programmed in the
previous menu) expires or until the controller power is cycled.