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Reset Timer
This menu only appears if the output mode has been selected as a Low Set Point, or a High Set Point and the
time limit has expired.
Determine the reason that the output stayed on too long, and once the problem has been solved, press
ENTER
to reset the timer.
Probe Wash
Sched
This menu only appears if the output mode has been selected as a Probe Wash.
Press
ENTER
to program the probe wash schedule. The display will be “Event A 00:00 00”. The first numbers
are the time of day, in military time, when the probe wash will take place. The last two numbers are the time, in
seconds, that the relay will be closed and the pump or valve attached to the relay will clean the probe. Use the
arrow keys to change the time of day and the duration of the cleaning. When both values are set, press
ENTER
.
If the electrode needs to be washed more than once a day, additional events may be accessed by pressing the
NEXT key. Once all events are programmed, press
EXIT
to return to the top level menus.
Hold Time
This menu only appears if the output mode has been selected as a Probe Wash.
Use the arrow keys to select the time delay in seconds between the probe wash ending and control beginning
again. The hold time can be a maximum of 99 seconds. During the hold time, the summary display will indicate
“Probe Wash Hold”.
Interlock
Use the Up and Down arrows to toggle between Y(Yes) and N(No). Choosing Y means that the output will
deactivate if the device attached to the controller is open. For example, if the electrode is installed in a
recirculating pipe line, a flow switch that is closed if flow is sufficient and open if flow is insufficient may be
installed in the line, so that if flow past the electrode stops, the controller will not pump in chemicals based on a
stagnant sample. Similarly, a level switch may be attached to prevent control of an empty batch tank.
HOA
Use the Left and Right arrows to move between Hand, Off and Auto. In Hand (Manual) mode, the output will
be turned on immediately for a maximum of 10 minutes. In the Off mode, the output will be turned off
indefinitely. In the Auto mode, the output turns on and off in response to changes in the process value relative to
the set point. The letter inside the block on the status screen indicates which mode the output is in.
