ProMinent DCM3 Series User manual

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.
2.04ppm 2.33ppm 
7.44pH 783mV
84.5F 256gpm
STATUS ALARMS SETPNT
CAUTION
Before attempting calibration or commissioning of the DCM3 control system,
water chemistry must be stable and within normal operating ranges of 7.2-7.8
pH, Free Chlorine at 1-5 ppm, and Total Alkalinity level at 80-120 ppm.
E:pH Sensor
Enter value
7.66pH
SAVE MORE
1:Acid Feed
Adjust Setpoint
7.4pH
DEDBND
C:Free Chlorine
DPD wait: 25sec
2.2ppm
SAVE MORE
C:Free Chlorine
Sample & press DPD
2.2ppm
DPD MORE
C:Free Chlorine
Sensor Calibrated
NEXT
ORP input is factory calibrated and cannot be
re-calibrated in the field.
Calibrations
Adjusting Setpoints

Alarm Info and Alarm Clear Example:
NOTE: All alarms in the DCM3 series controllers are latching alarms
by default. Once an alarm is triggered, it must be acknowledged or
cleared. Alarm latching can be turned off in the DCM3 I/O Setup
menus.
If an alarm is active with the red LED flashing, pressing
ALARMS will show how many alarms there are on
the top line, and specific alarms on the 2nd and 3rd
lines.
Select the individual alarm using the ►, then press and
hold INFO button , and LED screen will show
detailed information on each alarm.
Pressing CLEAR will clear the selected alarm
CLRALL will clear all alarms, extinguish the flashing
red ALARM LED, light the blue OK LED, and return to
the Home screen.
A quick way to force all chemical feed relays to the
OFF position is to press the button. The status
LED will change to a steady RED as will all the active
control output LEDs. To resume normal control on all
outputs, press again. A steady BLUE status LED
indicates normal operation with no alarms, and a
flashing RED LED indicates normal opreration with an
active alarm.
Temporarily forcing a feeder ON, we call “Priming”
because that is the most frequent use of this function-
to prime a chemical feeder. The relays can also be
forced to STOP (i.e., during troubleshooting) or then be
“UNSTOPPED” to be returned to normal operation
from this menu.
To Prime or “Force ON”a relay:
From the Home screen, press then to select
Prime, Force ON then press .
Enter an operator level password or higher if required,
then press .
Select the feeder to Prime or STOP, then press .
The default time on the Prime duration is 5 minutes.
Change the Prime timer duration, if desired, using the
arrow keys, then press START to begin priming the
pump.
Pressing CANCEL again, cancels the Prime and
returns the relay to normal control by the sensor.
Pressing STOP not only STOPs the Prime, but also
forces the feeder OFF, until you UNSTOP the feeder.
ProMinent Fluid Controls, Inc.
136 Industry Drive
Pittsburgh, PA 15275
412.787.2484
www.prominent.us
Part Number 7750429 Rev.4 9/29/22
© 2022 ProMinent Fluid Controls, Inc. All Rights Reserved.
Alarms
2.04ppm 2.33ppm 
7.44pH 783mV
84.5F 256gpm
STATUS ALARMS SETPNT
3 ALARMS 
►1:Acid Feed
E:pH Sensor
CLRALL INFO CLEAR
3 ALARMS 
►1:Acid Feed
E:pH Sensor
CLRALL INFO CLEAR
3 ALARMS 
Limit:ON timer @
00:20 2017-Aug-23
& 03:56 2017-Jul-03
3 ALARMS 
►1:Acid Feed
E:pH Sensor
CLRALL INFO CLEAR
2 ALARMS 
►E:pH Sensor
C:Free Chlorine
CLRALL INFO CLEAR
2 ALARMS 
►E:pH Sensor
C:Free Chlorine
CLRALL INFO CLEAR
2.04ppm 2.33ppm 
7.44pH 783mV
84.5F 256gpm
STATUS ALARMS SETPNT
START / STOP key
2.04ppm 2.33ppm 
7.44pH 783mV
84.5F 256gpm
STATUS ALARMS SETPNT
Control
OFF:User STOPs!
START restarts
Any key exits
Feeder Prime/Force OFF
2.04ppm 2.33ppm 
7.44pH 783mV
84.5F 256gpm
STATUS ALARMS SETPNT
MENU 
Home
Adjust Setpoints
►Prime, Force ON
MENU 
Home
Adjust Setpoints
►Prime, Force ON
Prime, Force ON 
►1:Acid Feed
2:Oxidant Feed
3:Booster Feed
Prime, Force ON 
1:Acid Feed
00:05:00
STOP START
Prime, Force ON 
1:Acid Feed
00:04:59
STOP CANCEL
2.04ppm 2.33ppm 
7.44pH 783mV
84.5F 256gpm
STATUS ALARMS SETPNT
CAUTION: Forcing a feeder on for an extended period
can be hazardous.
NOTE: For safety, if the feeder selected is in a timeout alarm, or
the flow switch or START/STOP button has stopped chemical feed,
you will not be able to force the feeder ON (Prime) until these
conditions are changed.