ROLA-CHEM Digital Controller PN 554135 5/04/2017 Page: 8 of 20
Modes:
The controller has four modes of operation:
ON/OFF mode.
AUTO mode – normal operation mode
pH - setting mode
ORP - setting mode
To move from one mode to another simply press the MODE button.
The illuminated lamp indicates the current mode.
3.3.1 On/off mode:
To turn the controller “ON”: press the MODE button.
To turn the controller “OFF”: press and change MODE to pH or ORP and hold the MODE
button for two seconds until both displays read “OFF”. Release the MODE button and the
controller turns off and the displays go blank.
Note: Turning the controller “OFF” using the MODE button simply turns off the controller
functions, but does not turn off the power to the controller. The ‘FLOW’ lamp located at the center
of the controller is both the power light and a flow indicator when an optional flow switch is used.
3.3.2 AUTO mode:
This is normal operation mode. The controller operates the respective feeders
to automatically maintain the parameters set for both pH and ORP.
3.3.3 pH SET mode:
This enables the six programming buttons to set desired pH parameters.
Note: When scrolling through the set modes, to reverse the direction simply release the button
momentarily and press the button again.
Feed Once button
: By pressing the FEED ONCE button, the pH feeder will feed and delay for
one complete feed cycle. See FEED TIME Button for feed/delay times. If the Feed time is set
for “Continuous feed” the manual feed will not operate.
Set Level button
: Pressing the SET LEVEL button once will display the current set level. To
change the set level, press and hold the SET LEVEL button (which displays in 0.1 pH
increments) until the desired level is reached.
Feed Time
: The feed times are displayed in seconds.
Each feed cycle includes a five (5) minute delay time. Pressing the FEED TIME button allows
the user to scroll through the available feed times. Release the button when the desired pH
feed time is reached. To set the controller in Continuous feed, release the button when the
display reads “con”. Continuous feed runs feeder continuously until set point is reached and
the current feed cycle is complete or until Consecutive Feed Alert Limit is reached or until
Hi/Low Alert limit is reached. See appendix for Consecutive Feed Alert Limit details. Feed time
can also be set to “off”.
Note: The controller will overshoot the pH setpoint by 0.1 to reduce on/off cycles.
Hi Alert
: Pressing the HI ALERT button allows the operator to set or turn off the HI alert level
feature. As the button is pressed the pH readout will scroll through the available HI alert pH
levels (7.5 to 8.4 and off). Release the button when the desired level is reached. The Hi Alert
cannot be turned off in the BASE feed selection.
