NDE Pool DDPHCL2 User manual

DDPHCL2 Unit
pH / Chlorine Control
INSTRUCTION MANUAL

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WARNINGS
This manual is dedicated to the technical personnel responsible of the installation,
management and maintenance of the plants. The manufacturer assumes no responsibility for
damages or malfunctions occurring after intervention by non-authorized personnel, or not
compliant with the prescribed instructions.
Before performing any maintenance or repair action, ensure that the system is electrically
and hydraulically insulated.
Dispose of waste material and consumables accordingly with local regulations.
GENERAL SAFETY TIPS
WARNING! Before performing any operation on the pump, unplug the pump and discharge
the liquid from the pump head and tubes. Never operate on working pump!
During maintenance and repair of parts that normally become in contact with chemicals,
always wear all prescribed personal protections (gloves, clothes, glasses, etc.).
The pump has to be handled by qualified personnel only. Always use original spare parts for
maintenance.
Failure to follow instructions can cause damage to the equipment and, in extreme cases, to
people.
How to ship the instrument
To send back the device for repairing or calibration purposes, proceed as follows:
•Fill the module “REPAIR REQUEST AND DECONTAMINATION DECLARATION” supplied with this
manual, and include it in the transport documentation.
•Clean the device properly, to eliminate any hazardous residuals.
The manufacturer can modify the instrument or the technical manual without advanced notice.
Warranty
All our products are warranted for a period of 12 months from the delivery date.
Warranty is not valid if all instructions of installation, maintenance and use, are not strictly followed by the user.
Local regulations and applicable standards have also to be followed.
In particular, the warranties regarding the operational safety and reliability of dosing pumps will be recognized
only if the following conditions are fulfilled:
oThe installation, wiring, adjustment, maintenance and repairs performed only by qualified personnel
oOnly original spare parts have been used for repairs

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TABLE OF CONTENTS
PACKING LIST ....................................................................................................................................4
INTRODUCTION .................................................................................................................................4
INSTALLATION ...................................................................................................................................4
TECHNICAL DATA ..............................................................................................................................5
FUNCTIONAL DESCRIPTION OF THE SYSTEM ...............................................................................6
HYDRAULIC CONNECTIONS.............................................................................................................8
Suction Line..............................................................................................................................8
Injection Line ...........................................................................................................................8
ELECTRICAL CONNECTIONS............................................................................................................9
Level Control ............................................................................................................................9
Flow Control .............................................................................................................................9
INTERNAL CONNECTIONS (for technical personnel only) ....................................................10
START-UP.........................................................................................................................................10
VISUALIZATIONS..............................................................................................................................11
OPERATION OF THE ELECTRONIC UNIT.......................................................................................11
Standard Configuration...........................................................................................................11
Advanced Configuration .........................................................................................................12
List of Configuration Parameters ............................................................................................12
Meaning of Configuration Parameters ....................................................................................13
Electrochemical Calibration ....................................................................................................15
Manual Mode..........................................................................................................................16
CONTROL EXAMPLES .....................................................................................................................16
ERRORS / ALARMS..........................................................................................................................17
MAINTENANCE.................................................................................................................................17
ACCESSORIES AND SPARE PARTS...............................................................................................19

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PACKING LIST
The DDPHCL2 unit is supplied already wired internally, and complete with:
1. pH electrode with glass body, 65 cm cable and BNC connector with protective sheath
2. Redox electrode with platinum sensor, glass body, 65 cm cable and BNC with protective sheath
3. pH and redox calibration solutions, 90 ml each (pH4, pH7 and 220 mV)
4. Two standard kits for peristaltic pump, each one including:
•foot filter and injection valve with ½” connections
•PVC Crystal, 4x6 tube for suction line, 2 meters
•semi-rigid PE, 4x6 tube for injection line, 2 meters
5. Screws and stoppers for wall installation
6. Instruction manual
INTRODUCTION
DDPHCL2 is a compact system easy to install (wall) and maintain, which allows to monitor and control
the pH and redox potential levels in swimming pools.
The DDPHCL2 system includes a digital controller which operates accordingly with the set thresholds,
two peristaltic pumps, pH and redox electrodes with BNC connector, and down-flow probe-holder.
INSTALLATION
Warning! Always follow the warnings and general safety information referred at the
beginning of this manual!
Install the DDPHCL2 unit away from heat sources, in a dry place protected from direct sunlight, at a
maximum ambient temperature of 40°C.
The minimum temperature shall be such as to ensure the solution to be dosed remains in a fluid state
and in no case less than that declared in the “Technical specifications” section.
The DDPHCL2 unit must be installed on a vertical wall and securely clamped. Choose a location that
allows easy calibration operations, use and maintenance.
Place the tanks of the products to be dosed below the pumps, without exceeding the maximum suction
height of the pumps (about 1.5 m).
If the system is installed below the level of the liquid to be dosed, check the condition of the injection
valves or install appropriate anti-siphon kit.
If the pump is placed above the tank and the reagent fumes could be especially aggressive, check the
tank seals.
Connect the connectors may be disconnected for packaging reasons to the respective inputs on the
bottom of the unit (see the “Functional description” section for further details).

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TECHNICAL DATA
pH and RX Inputs available on BNC connectors, input impedance > 10^12 Ω
Measure Ranges 0.00 to 14.00 pH, 0 to 1000 mV (redox)
Precision better than 1% of the full scale
Repeatability better than 0.2% of the full scale
Configuration two configuration level (standard and advanced)
Digital Inputs 2 independent inputs for level sensors, available on connectors, accept
voltage-free contact 5 V / 5 mA;
1 FLOW input that can be used for connecting both the filter pump
contactor or the flow sensor, voltage-free contact 5 V / 5 mA
Display large alphanumeric, double row (x 16 characters) LCD, with backlight
Electrode-holder down-flow type, transparent methacrylate body, with standard
connections for 8x12 tube and sampling needle
Peristaltic Pumps Flow rate: 1.5 l/h @ 1 bar for pH adjustment (acid dosage)
6 l/h @ 1 bar for chlorine dosage
Materials: fiberglass reinforced PP pump head and fittings,
Santoprene internal tube, PBT roller holder with Delrin
(self-lubricant) rollers
Max suction height: 1.5 m
Power Supply 230 V~ ±10%, 50 Hz, max 80 VA
Protection Fuse F1A 5x20 (@ 230V~)
Environment Storage temperature -20 to +60 °C
Working temperature -10 to +40 °C
RH max 90% noncondensing
Casing self-extinguish plastic material with polyester front panel
Installation wall installation with supplied screws and stoppers
Protection Rate IP65
Dimensions 380 x 350 x 175 mm
Fixing Template 356 x 250 mm
Weight approx. 5 kg

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FUNCTIONAL DESCRIPTION OF THE SYSTEM
Front view
•Control panel with large display and keyboard (see description on next page)
•Peristaltic pump (1) for acid dosage
•Peristaltic pump (2) for chlorine dosage
•Transparent methacrylate, down-flow type electrode-holder
Bottom view: connections
•POWER Prewired power cable
•LEV1 Level sensor connector for acid pump / tank 1 (acid)
•LEV2 Level sensor connector for chlorine pump / tank 2 (chlorine)
•FLOW Connector for flow sensor
•pH BNC connector for pH electrode
•RX BNC connector for redox electrode

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Front panel
POWER LED Green light; slow flashing indicates that the unit is powered and normally
functioning, while fast blinking indicates a fault (lack of liquid to be dosed or pump
disabled)
PUMP1, 2 LED Red light on during the rotation of the respective pump
CAL Key Provides access to the “Configuration”, “Calibration” and “Manual Mode” menus;
confirms parameter modifications
Key Scrolls the available menus/options; in calibration and configuration modes
decreases the displayed value
Key Scrolls the available menus/options; in calibration and configuration modes
increases the displayed value
ESC Key In calibration and configuration modes exits without saving the modifications;
from manual mode resumes to normal operations
ON/OFF Key Activate / de-activates the unit or confirms alarms; both the disabled dosing or
alarm condition are indicated by the POWER LED that flashes fast
(Warning! The unit remains disabled even in case of shutdown / restart)

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HYDRAULIC CONNECTIONS
Check that the suction line does not exceed the maximum height of 1.5 m from the tank bottom.
Unscrew the pipe-wrench nut and remove the two protective caps from fittings (in the case a pump
head needs to be removed, it is recommended to reuse the protective caps, to prevent any leakage
from the pump body).
Note: If the product to be dosed is sulfuric acid (10% max concentration), previously remove any water
from the pump and use polyethylene pipes.
All operations to tighten the pipe connections of the pumps must be done by hand, without using any
tools (e.g. pliers squeeze tube), to avoid damaging the hydraulic connections.
Warning! Before performing any kind of operation on the pump, carefully read the HSDS of
the chemical to be dosed, in order to define the proper behaviours to be followed, and the
personal safety equipment to be worn.
Suction Line (also see drawing)
1. Unscrew the fixing nut of the connector located on the bottom left
side of the pump head and marked in the figure with an incoming
arrow.
2. Cut the transparent PVC Crystal tube.
3. Insert the fixing nut and the tube-wrench on the tube.
4. Mount the tube on the conic tube-holder of the suction connector,
pushing it until it reaches the stop collar.
5. Fix the tube by screwing the fixing nut onto the suction connector of
the pump head.
6. Locate the PVC Crystal tube inside the tank and/or the suction lance.
7. Unscrew the fixing nut of the foot filter.
8. Cut the transparent PVC Crystal tube.
9. Insert the fixing nut and the tube-wrench on the tube.
10. Mount the tube on the conic tube-holder of the foot filter connector,
pushing it until it reaches the stop collar.
11. Fix the tube by screwing the fixing nut onto the connector of the foot filter.
12. Screw the foot filter onto the suction lance (if used) and/or locate it in its working place.
Notes:
•The foot filter must be located at a minimum distance of 5 cm from the tank bottom.
•If a dense product is dosed, it is recommended to remove the small inside filter from the foot valve,
in order to facilitate the suction.
Injection Line (also see drawing)
1. Unscrew the fixing nut of the connector located on the bottom right side of the pump head and
marked in the figure with an outgoing arrow.
2. Cut the white, semi-rigid polyethylene tube.
3. Insert the fixing nut and the tube-wrench on the tube.
4. Mount the tube on the conic tube-holder of the suction connector, pushing it until it reaches the stop
collar.
5. Fix the tube by screwing the fixing nut onto the head connector of the pump head.
6. Place the injection tube avoiding as much as possible the curves and ensuring that the pulses do
not make the tube rub against rigid bodies.
7. Perform electrical connections (see related section in the manual) and power the pump.
8. At the injection point on the pipeline, mount a ½” GAS connection, internally threaded (not supplied.

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9. Wrap PTFE tape to the thread and tighten the injection valve to the fitting.
10. Unscrew the pipe-wrench nut of the injection valve fitting.
11. Cut the white, semi-rigid, PE tube.
12. Insert the pipe-wrench on the PE tube.
13. Mount the tube on the conic hose of the injection valve, pushing it until it reaches the stop collar.
14. Screw the pipe-wrench nu tonto the valve fitting.
Note: The injection valve also works as non-return valve: do not disassemble it internally.
ELECTRICAL CONNECTIONS
The DDPHCL2 unit is supplied already wired internally and complete with power cable (with plug upon
request). This is the only electrical connection to be performed by the customer.
Standard power supply: 230 V∼, 50 Hz, monophasic.
Carefully follow all the rules of electrical safety.
Before starting the unit, check that all electrical and plumbing connections have been
properly executed.
The measure inputs from pH and redox electrodes are available on BNC connectors, while inputs for
level sensors (one for each pump) and flow sensor are available on special connectors that allow an
extremely fast and easy connection even for unskilled personnel.
Note: the pH and redox inputs should never be left open; if an input is not used, you need to short-
circuit it.
Level Control
The system is supplied already configured for disabling the dosage in case of low level in
the tank. The level control is made through a specific float sensor (optional, see
“Accessories and spare parts”), to be connected to pins 3 and 4 of the LEV connector
(see Figure)
When the product level in the tank falls below the level sensor, the unit stops dosing and
the fault is shown on the display.
The alarm condition is generated with a delay of a few seconds compared to the detection of low level,
to avoid errors due to extreme situation (such as water surface).
Two inputs for level sensor are available, one for each pump / tank.
Flow Control
The system is supplied already configured for disabling the dosage in case of lack of
water flow. The control is made through a SPDT contact to be connected to pins 3 and
╧of the FLOW connector (see Figure).
A specific flow sensor is also available (optional, see “Accessories and spare parts”).

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INTERNAL CONNECTIONS (for technical personnel only)
The unit is provided prewired internally, and all connections of normal use (power supply, measurement
sensors and level sensors) are available externally via cable or connector.
However, if you need to operate on the electronic boards or replace blown fuses, refer to the diagram
below.
Notes:
•The possible reversal of the connections line / neutral of the power supply does not affect the normal
operation.
•If the level and flow inputs are not used, leave them open (not connected).
START-UP
At start-up the microcontroller displays for a couple of seconds information about the firmware (type /
version), then shows the two measures flashing for all the start-up delay time (if set) and then starts
operating accordingly with the configured working mode.
Reserved
Power
Transformer
Fuse F1A
Y/G L N
Pump 1
Y/G N L
Power Supply
µProcessor
Br Bk Bl
Flow
+ -
Level 1
Connector for front board flat cable
Y/G L N
Pump 2
IN pH IN RX
Reserved
+ -
Level 2

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VISUALIZATIONS
During normal operations, the display shows the two measured values on the top line, while the bottom
row displays the status of the two pumps.
For example: “7.25pH 286mV”
“P1 ON P2 020%”
(pump 1 ON in ON/OFF mode, pump 2 ON in proportional mode with indication
of the functioning percentage)
In these conditions, pressing the or button, you can display the OFFSET and GAIN values of the
pH and redox measurements. For example: “7.25pH”
“O=-4 G=1.000”
This information is useful to verify the electrode status. Note that an electrode in good condition should
have an offset close to zero and a gain close to 1.000. When these values deviate from the ideal ones,
indicate a dead electrode or sensor aging.
During manual working mode, the display shows on the top line the pump to which the information
refers, while the bottom row shows the pump status.
For example: “Pump 2 manual”
“ON ”
In these conditions, pressing the ON/OFF button allows to enable / disable the pump. In case of fault
or alarm condition, the pump stops dosing until the normal working conditions are restored.
OPERATION OF THE ELECTRONIC UNIT
To access the configuration, calibration and manual mode menus, press the CAL button. The display
will show the following available options:
•Standard Configuration
•Advanced Configuration
•Calibration IN1 (input 1) pH
•Calibration IN2 (input 2) redox
•Manual Mode 1 (pump 1, acid dosage)
•Manual Mode 2 (pump 2, chlorine dosage)
Use the keys to scroll the available options, then press CAL to enter the highlighted mode or ESC
to return to measurement visualization.
Standard Configuration
The standard configuration mode allows the customer to set a series of parameters related to the normal
functioning of the unit. These parameter can be freely accessed and configured from the front keyboard.
1) Once selected the “Standard Configuration”
option, press the CAL button to edit the list of
parameters, or press ESC to return to the
normal visualization mode
2) Now use the keys to scroll the list of the
available parameters
3) To modify the displayed parameter, press CAL; to quit the mode press ESC
S T A N D A R D C O N F I G .
C A L > Y E S E
>
S C > N O
P 0 1 F U N C . T Y P E P 1
O n O f f

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Advanced Configuration
The advanced configuration mode also includes the parameters protected by password, that allow a
complete configuration of the system. This mode is normally accessed only by authorized technical
personnel.
1) Once selected the “Advanced Configuration”
option, press the CAL button to edit the list of
parameters, or press ESC to return to the
normal visualization mode
2) Now use the keys to scroll the list of the available parameters
3) To modify the displayed parameter, press CAL; to quit the mode press ESC
List of Configuration Parameters
In this section are listed all the configuration parameters.
It is recommended to fill the last column with the values set for your application.
PAR. Description Min Value Max Value Default
Value Set Value
P01 Functioning Type Pump 1 ON-OFF / Proportional ON-OFF
P02 Setpoint Pump 1 0.00pH 14.00pH 7.00pH
P03 Hysteresis Pump 1 0.20pH 2.00pH 0.50pH
P04 Dosage Pump 1 Acidification / Alkalization Acidification
P05
Time Base Pump 1
if P01= ON-OFF
if
P01= Propor
t
ional
5%
30 sec
100%
360 sec
60%
60 sec
P06 Functioning Type Pump 2 ON-OFF / Proportional ON-OFF
P07 Setpoint Pump 2 0mV 1000mV 750mV
P08 Hysteresis Pump 2 20mV 200mV 50mV
P09 Dosage Pump 2 Chlorination / De-chlorination Chlorination
P10
Time Base Pump 2
if P06= ON-OFF
if P06= Proportional
5%
30 sec
100%
360 sec
60%
60 sec
P11 Alarm Pump 1 0min 240min 0min
P12 Alarm Pump 2 0min 240min 0min
P13 Start Delay 0min 60min 0min
P14 Language Italiano - English
Français
-
Español
English
P15 Restore default values 0 255 0
P16 Password 0 255 0
P17 Alarm Functioning Relay NO / Relay NC Relay NO
P18 Flow Functioning Input NO / Input NC Input NO
P19 pH Equilibrium 0min 240min 0min
Warning! The complete list of parameters can be accessed only from the “Advanced Configuration”
menu, while the “Standard Configuration” mode allows to modify only the parameters that are not
protected by password (highlighted in bold in the table above).
A D V A N C E D C O N F I G .
C A L > Y E S E S C > N O

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Meaning of Configuration Parameters
PARAMETER 01 FUNCTIONING TYPE OF THE PUMP 1
This parameter allows to set the functioning type of pump 1, typically used for the pH control.
PARAMETER 02 SET-POINT PUMP 1
This parameter allows to enter the desired pH value for the swimming pool water. The dosing pump is
activated / de-activated to reach this value and keep it constant.
PARAMETER 03 HYSTERESIS PUMP 1
This parameter is sued to adjust the functioning hysteresis of pump 1 around the threshold set in P02.
It is recommended to set a narrow window in case of ON-OFF mode, while for proportional mode it is
advisable to set a window of at least points.
PARAMETER 04 DOSAGE DIRECTION OF PUMP 1
This parameter allows to set the dosage direction. The choice depends on the product dosed to adjust
the pH level: if you dose an acid, set this parameter to “Acidification”, while if you dose a base set
“Alkalization”.
PARAMETER 05 TIME BASE FOR PUMP 1
If the pump is configured to ON-OFF mode, this parameter indicates a percentage of operation of the
pump, on a fixed time base of 100 seconds. 100% corresponds to pump always ON, while 5% indicates
that the pump is ON for 5% of time (=5 seconds) and OFF for the remaining 96% (=95 seconds).
If the pump is configured for proportional operation, this parameter indicates the time base of pump.
PARAMETER 06 FUNCTIONING TYPE OF THE PUMP 2
This parameter allows to set the functioning type of pump 2, typically used for controlling the redox
potential level. See description of parameter P01.
PARAMETER 07 SET-POINT PUMP 2
See parameter P02, but referred to redox measurements.
PARAMETER 08 HYSTERESIS PUMP 2
See parameter P03, but referred to redox measurements.
PARAMETER 09 DOSAGE DIRECTION OF PUMP 2
See parameter P04, but referred to redox measurements and dosing directions “Chlorination / De-
chlorination”.
PARAMETER 10 TIME BASE FOR PUMP 2
See parameter P05, but referred to the pump 2.
PARAMETER 11 DOSAGE ALARM OF PUMP 1
This parameter allows to generate an alarm when the measurement does not return to the setpoint
value within a set time interval, from 0 (function disabled) to 240 minutes. The counter starts when the
unit detects a measurement that exceeds the setpoint value, and automatically resets to zero when
measurement returns to an acceptable. If measurement remains outside of the setpoint for a time longer
than that set, an alarm is generated, the display shows the message “Al.1” and the pump stops dosing.
To reset the alarm and resume to normal operations, press the ON/OFF button or shutdown and restart
the unit.
This condition can occur when the dosage is insufficient to reach the setpoint (P02).
PARAMETER 12 DOSAGE ALARM OF PUMP 2
See parameter P11, but referred to pump 2.

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PARAMETER 13 START-UP DELAY
This parameter allows to set a start-up delay, which is a time of waiting before starting measurements
to allow the correct polarization and stabilization of the measuring electrodes. This prevents unreliable
initial readings. Typically in the case of pH measurements one minute is enough, while for redox
electrodes may be necessary a delay of 30 minutes. This waiting time also allows to compensate for
any hydraulic delays which may occur at the start-up of the plant. Set a time (in minutes) during which,
after turning on the electronic unit, the system waits, measurements blink on the display and the pumps
are not active. After this time, the system begins normal operation.
PARAMETER 14 LANGUAGE
This parameter allows to select the display language.
PARAMETER 15 RESTORE THE DEFAULT SETTINGS
This feature allows to restore the factory configuration if you want to delete incorrect or undesired
settings. Once confirmed this option, all custom setting will be lost.
To enable the feature, enter the value “12” .
PARAMETER 16 PASSWORD
This parameter allows to enter a password (numeric value within 1 and 255) to protect the system from
unauthorized access. Once set and confirmed, the password will be requested to access the menus
“Advanced configuration” and “Manual mode”.
The instrument is supplied with no password set (P16=0).
Warning! If you forget the password, you need to send back the unit to the factory for a complete
reconfiguration (out of warranty)!
PARAMETER 17 FUNCTIONING OF THE ALARM OUTPUT
This feature is not used for this unit.
PARAMETER 18 FLOW FUNCTIONING
This parameter allows to select the functioning mode of the “flow” input, normally open “NO” (factory
setting) or normally closed “NC”.
Warning! The inversion of this parameter compared to the default setting can determine the functioning
of the device even in the absence of flow!
PARAMETER 19 pH EQUILIBRIUM
This parameter allows to set a maximum waiting time before activating the redox (chlorine) adjustment,
during which only the pH adjustment is active.
This time is counted from the start-up of the equipment, simultaneously to a possible start-up delay set
in P13, during which the entire measuring system is in stand-by.
In other words, the pH adjustment is activated after the start-up delay (P13) has elapsed, while the
redox (chlorine) regulation is activated when the pH reaches the set threshold (P02) or in any case at
the end of the “pH Equilibrium” period.
For example, if a 1-minute start-up delay is set and you want the pH is adjusted for a maximum of 15
minutes before also activate the redox (chlorine) regulation, the “pH Equilibrium” time should be set to
16 minutes.
To disable this feature, simply set the parameter to 0 (default).
Notes:
•Once in configuration mode, if no button is pressed for 30 seconds, the unit automatically returns
to the idle mode.
•The system is factory configured with default values; you can delete undesired settings and restore
the initial configuration, using the “RESTORE” function (P15).

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Electrochemical Calibration
pH Calibration
1) Rinse the pH electrode with distilled water, then immerse it in the pH 7.01 pH buffer solution
2) Press the CAL key to enter the menu mode and
use the keys to select the option “IN1
CALIBRATION”
3) Press CAL again to confirm
4) Press to select the OFFSET calibration and
confirm by pressing CAL
5) The system automatically recognizes and displays the buffer value (7.01 pH)
6) If necessary, use the keys to adjust the calibration value
7) Press CAL to confirm the calibration, or ESC to quit the procedure and keep the previous calibration
8) Rinse the pH electrode with distilled water, then immerse it in the pH 4.01 (or 9.01) buffer solution
9) Press the CAL key to enter the menu mode and use the keys to select the option “IN1
CALIBRATION”
10) Press CAL again to confirm
11) Press to select the GAIN calibration and
confirm by pressing CAL
12) The system automatically recognizes and
displays the buffer value (4.01 or 9.01 pH)
13) If necessary, use the keys to adjust the
calibration value
14) Press CAL to confirm the calibration, or ESC to quit the procedure and keep the previous calibration
Notes
If the system does not automatically recognize the buffers or the “Calibration Impossible” error occurs, it can
be due to: a) buffer solution contaminated or expired
b) electrode faulty or dead
c) connection cable or connector damaged
If you try to calibrate the offset at a pH value too different from 7.00, the calibration is automatically ignored.
Similarly if you try to calibrate the gain with a buffer solution at a pH too close to neutrality, the procedure will
fail.
During normal operation, it is possible to view the offset (pressing  ) and gain (pressing  ) values, to check
the electrode status. The ideal values are an offset close to zero and a gain close to 1.000. When these values
are close to the max / min limits (offset: -1.00pH ... +1.00pH; gain: 0.750 ... 1.500), the electrode is
contaminated or dead.
Redox Calibration
1) Rinse the electrode with distilled water, then immerse it in the calibration solution (e.g. 220 mV)
2) Press the CAL key to enter the menu mode
and use the keys to select the option “IN2
CALIBRATION”
3) Press CAL again to confirm
4) Press to select the OFFSET calibration and
confirm by pressing CAL
5) The system automatically recognizes and displays the solution value (220 mV)
6) If necessary, use the keys to adjust the calibration value
7) Press CAL to confirm the calibration, or ESC to quit the procedure and keep the previous calibration
I N 1 C A L I B R A T . P H
C A L > Y E S E S C > N O
I N 1 C A L I B R A T . P H

O F F S E T  G A I N
I N 1 C A L I B R A T . P H
C A L > Y E S E S C > N O
I N 1 C A L I B R A T . P H

O F F S E T  G A I N
I N 2 C A L I B R A T . R X
C A L > Y E S E S C > N O
I N 2 C A L I B R A T . R X

O F F S E T

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Notes
If the system does not automatically recognize the buffers or the “Calibration Impossible” error occurs, it can
be due to: a) calibration solution contaminated or expired
b) electrode faulty or dead
c) connection cable or connector damaged
During normal operation, it is possible to view the offset value by pressing  , to check the electrode status.
The ideal offset value is close to zero. When this value is close to the max / min limits (-100mV ... +100mV),
the electrode is contaminated or dead.
Manual Mode
At any time you can force a manual working mode, useful for a temporary use of the system. If a
password has been set (see parameter P16), the system will require it to enable the access to this
feature.
1) Press the CAL key to enter the menu mode and
use the keys to select the option “MANUAL
FUNC.1” (or “MANUAL FUNC.2”)
2) Press CAL again to confirm
3) Similarly proceed for pump 2
4) Press ESC at any time to exit the manual mode
Warning! In manual mode only one pump at a time can be activated.
CONTROL EXAMPLES
Typical application in swimming pool control: acidification when pH exceeds the pH value of 7.30.
Refer to the “List of configuration parameters” and set:
-P01 ON/OFF working mode for pump 1
-P02 set-point 7.30 pH
-P04 dosage direction “ACIDIFICATION”
-P11 alarm pump 1 = 60 minutes
Typical application in swimming pool control: chlorination when redox potential falls below 680 mV.
Refer to the “List of configuration parameters” and set:
-P06 PROPORTIONAL working mode (recommended for an easier stabilisation)
-P07 set-point 680 mV
-P09 dosage direction “CHLORINATION”
-P10 if the quantity of the product to be injected is not known, it is recommended to start with a
time base of 60 seconds (default), and if the chlorination process would last too long, decrease the
time base gradually until a conditioning time of approx. 30-45 minutes
-P12 alarm pump 2 = 60 minutes
Common settings for the two examples described above:
-P13 start-up delay of 15 minutes (average time required for the polarization of redox electrodes)
-P16 protection PASSWORD to prevent unauthorized access
M A N U A L F U N C . P 1
C A L > Y E S E S C > N O
M A N U A L P U M P 1
O F F

DDPHCL2_man_r1.0 – 03/2021 Page 17
ERRORS / ALARMS
Every error or anomaly detected by the system generates an alarm message on the display:
LEV1 / LEV2 The level sensor 1 or 2 detected a low level of the liquid to be dosed;
restore the level into the related tank
FLOW The flow sensor detected an anomaly that can be due to low pressure
into the hydraulic circuit or wrong adjustment of the flow sensor; restore
the flow or adjust the sensor
STOP This message indicates that the pumps have been manually de-activated
by pressing the ON/OFF button
UR / OR Under/Over Range: measurement out of range; this signal can be
generated by a dead or broken electrode, or by a damaged or
disconnected cable; check the system and restore correct measurement
conditions
AL.1 / AL.2 Dosing time alarm for pump 1 or 2: measurement is outside the set-point
for a time longer than the set limit, due to an insufficient dosage or a
wrong configuration of the alarm time (see parameters P11 and P12);
set the parameters properly
Calibration Impossible Check the status of electrode and connection cable; check that the
calibration solutions are not expired or contaminated; repeat the
procedure
MAINTENANCE
The periodic maintenance operations are essential for the proper functioning of the system and its
duration in time. The below advices should be strictly followed.
Before any operation, make sure the system is unplugged!
Dosing Pumps
Weekly operations:
-Check the level of the solution to be dosed to prevent the pump from running dry
-Check that the suction and head pipes are clean and not containing any impurities
-Check that the filter is not clogged to avoid the decreasing of flow rate
Operations every three months (or in case of pump drifting):
-Clean all the parts that come into contact with the chemical (pump body, foot filter and injection
valve). If the pump doses additives that from crystals, clean more frequently.
Proceed as follows:
oDip the suction tube and the foot filer into clean water
oStart the pump and leave it run for a few minutes to let the water wash the pump head
If there are crystals to remove, proceed as follows:
oFirst use a proper chemical (instead of water) to dissolve the crystals (e.g. hydrochloric acid
for sodium hypochlorite crystals) and let the pump work for a few minutes
oRepeat the procedure with clean water
Once the cleaning is done, connect again the pump to the plant and resume normal operations.

DDPHCL2_man_r1.0 – 03/2021 Page 18
Extraordinary maintenance – Replacing the peristaltic tube:
Unscrew the two front screws and remove the transparent cover.
To remove the old tube, first release the left connector and then turn
the roller-holder as shown by the arrow in the figure, to free the tube
up to the right connector.
Insert the left connector into the new tube, in its housing, while
making sure that the rounded part is positioned inward.
Then turn the roller-holder clockwise, so that the tube is inserted in its
housing.
Insert the right connector in its housing and tighten the two front
screws to fix the transparent cover.
Pump wintering:
Before shutting down the system for wintering or anyway for a long period, dose
clean water to rinse the tube, then rotate the roller-holder clockwise to position it as
shown in the figure.
pH and Redox Electrodes
Typically, it is recommended to clean the electrodes when the response is slow or measurements are
not reliable, and when they have been used for a long time, especially in aggressive solutions,
pollutants, very acidic or very alkaline environments. A kit of solutions is available, for the cleaning and
storage of pH and redox electrodes. The kit includes three solutions:
-Solution A: dip the electrode in this solution for cleaning it
-Solution B: use this solution to rinse the electrode, before and after cleaning
-Solution C: storage solution to be used for filling the electrode protective cap when the electrode is
not used (wintering, closure of the plant)

DDPHCL2_man_r1.0 – 03/2021 Page 19
ACCESSORIES AND SPARE PARTS
Item Description Part No.
pH Electrode pH Electrode with plastic body, direct cable and BNC 80092000
RX Electrode RX/Pt Electrode with plastic body, direct cable and BNC 80192100
SDE Transparent methacrylate, down-flow probe-holder with PP
connections for hose 6x8 and sampling outlet 80610258
Flow control kit for SDE electrode-holder 97009203
Standard kit PVC Crystal suction hose (2 m), PE delivery hose (2 m), injection
valve and foot filter 96000100
Spare blue front case for peristaltic pump, with O-ring 96000141
Transparent front cover for peristaltic pumps 96000131
Santoprene internal tube for peristaltic pumps 96000232
Silicone internal tube for peristaltic pumps 96000242
SLP2 Level sensor with 2 m cable and connector 97009002
pH4-S pH 4 buffer solution, 90 ml bottle 80090095
pH7-S pH 7 buffer solution, 90 ml bottle 80090096
RX220-S Redox calibration solution (220 mV), 90 ml bottle 80190091
KRE Cleaning and storage kit for pH and redox electrodes 80099902