DCM3 Series Controller
Quick Start Guide
pH Single Point Calibration Example
Press the button, then use the arrow buttons
to scroll to pH sensor E, then press .
Login with your password, if requested.
Next, take a water test and using the buttons,
enter the results, one decimal
place at a time, followed by the
SAVE key. The LED screen
will indicate Sensor
Calibrated. Press NEXT to continue to the next
sensor to be calibrated, or press ESC twice to return to
the Home screen.
Free Chlorine
Single Point Calibration Example
NOTE: The Free Chlorine calibration routine is
designed to optimize a DPD calibration by
remembering the ppm value at the moment the DPD
button is pressed.
Press the button, then use
the buttons to scroll to C:
Free Chlorine, then press .
Login with your password, if requested.
When ready, remember to press the DPD button
first, to instruct the calibration to
save the sensor reading. A timer
is then started on the display for
your use. Once the Free
Chlorine value is measured,
enter the results using the arrow buttons, followed by
the SAVE key.
If the calibration is accepted, the LED screen will then
indicate Sensor Calibrated. Press NEXT to
continue to the next sensor to be
calibrated, or twice to return
to the Home screen.
Status LED
Steady Blue = Normal
Flashing Red = Alarm
Steady Red = An output relay is Forced OFF
pH Setpoint Example:
Set points menu is located in the outputs that control
the feeders.
By default, and in our example, the pH feeder is
assigned to Relay 1: Acid Feed.
To change the pH set point, press the SETPNT
button. Use the buttons to point to the ►1:Acid
Feed relay, then press .
Login with your password if
requested, then press .
Use the buttons to
change the pH Setpoint, then press to save the
new setting.
Deadband:
Deadband is the control overlap necessary to keep a
feeder from turning on and off too rapidly, sometimes
called “chattering”.
By default, the pH feeder is assigned a deadband of
0.10 pH. This means the pH must deviate 0.10 pH
above the setpoint before the acid feeder will turn on.
The default deadband for ORP is 5mV and the Free
Chlorine deadband is 0.5 ppm.
The control deadbands do not normally need to be
changed after being set by your ProMinent technician
during startup.
Refer to the Operation and Installation manual for more
information on the Deadband and its function.
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