Rola-Chem 554000 ORP/pH Digital Controller - Manual (Page 9)

alert pH levels (6.8 to 7.3 and off). Release the button when the desired level is reached. The
Low Alert cannot be turned off in the ACID feed selection.
pH Calibrate: This button allows the operator to calibrate the pH sensor to a buffer or to a
sample tested with a test kit. Pressing the pH CALB button allows the operator to set the pH
reading to the desired pH level.
NOTE: The sample to be tested should always be taken from the flow cell or container in which
the pH sensor is located. The pH calibration allows the adjustment of +/- 1 pH in .1 pH
increments.
ORP mode: This enables the first five programming buttons to set the desired ORP parameters.
Feed Once: By pressing the feed once button, the ORP 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: 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 5 m volts increments) until the
desired level is reached.
Feed Time: The feed times are displayed in seconds. There is a five (5) minute delay time
associated with each feed time. Pressing the feed time allows the user to scroll through the
available feed times. Release the button when the desired ORP feed time is reached. To set
the controller in constant feed mode, release the button when the display reads “con”.
Hi Alert: Pressing the High Alert button allows the operator to set or turn off the HI alert level
feature. As the button is pressed the ORP readout will scroll through the available HI alert
ORP levels (650 mv to 900mv, preset at 900 mv ). Release the button when the desired level
is reached.
Low Alert: Pressing the Low Alert button allows the operator to set or turn off the Low alert
level feature. As the button is pressed the ORP readout will scroll through the available ORP
levels (100 mv to 640 mv in 5 mv increments and “OFF”). Release the button when the
desired level is reached. The pH CALIB button is not functional in the ORP mode.
Note: Alert feature: If the ORP reading is out of the pre-set alert range for more than ten (10)
minutes the ORP red alert lamp will flash and the ORP feeder will be disabled. The system
will automatically reset when the alert condition has been cleared by itself or by an operator.
Rola-Chem Digital Controller PN 554102 6/01/2012 Page: 9 of 20