ITC WTRTEC RED User manual

WTRTEC
ENGLISH

CONTENTS
1. GENERAL DESCRIPTION 4
2. TRANSPORT AND HANDLING 4
3. TECHNICAL SPECIFICATIONS 5
4. OPERATION 6
4.1 Main screen and navigation 6
4.2 Setpoint conguration 7
4.3 Calibration 7
4.3.1 pH calibration 7
4.3.2 Flow rate calibration 7
4.4 Control conguration 8
4.4.1 Activation of the control 8
4.4.2 Advanced control conguration. PIQ control 9
4.5 Alarms 11
4.5.1 pH alarms 11
4.5.2 Zero ow alarm 11
4.5.3 Flow detector alarm 11
4.6 Conguration of the register outputs 12
4.7 Conguration and monitor 12
4.7.1 Initial conguration (SET UP) 12
4.7.2 Communications settings 13
4.7.3 Information on the unit and monitor 13
5. INSTALLATION 14
5.1. Installation diagram 14
5.2. Wiring 15
5.3. Remote start/stop activation 16

To avoid personal injury risks and damage to the environment, and to ensure proper
equipment operation, personnel responsible for installing, commissioning and maintaining the
equipment must follow the instructions in this manual, with special attention to the detailed
recommendations and warnings. The specic instructions for the use of the chemicals to be
dosed must also be followed.
SAFETY INSTRUCTIONS
6. START UP AND ADJUSTMENT 16
7. MAINTENANCE 17
CE DECLARATION OF CONFORMITY 19
WARRANTY 19

4
Product description
1. GENERAL DESCRIPTION
WTRTEC Red is a high-precision pH controller that at the same time is simple to install and operate.
Specially designed for in-line or in-tank regulating processes, where pH adjustment with acid or with base
is needed, and for neutralisation processes using acid and base.
The controller has two analogue (4-20 mA) and digital (relay) control outputs for acid and/or base dosing
pumps.
WTRTEC Red enables monitoring, remote management and historical logging by means of a mobile/
web application. A communications Gate (Ref. 01-006) is needed for this, which can be connected to the
internet by Ethernet or 3G/4G.
2. TRANSPORT AND HANDLING
The original packaging is designed to allow the equipment to be transported and stored without damage,
provided this takes place in dry, ventilated spaces away from heat sources.
Included in the packaging are:
- WTRTEC
- Instruction manual
INSTALLATION DIAGRAM
Communications
gate
(Ref. 01-006)
0
mS
2.5
PH
m3h 10.5
7.6
1
001
ºC 21.0
INTERNET

5
Product description
3. TECHNICAL SPECIFICATIONS
Power supply: 100-240 V 50-60 Hz. 10.8-14.4 VDC
Power: 6 W
IP65 protection
Housing material: ABS
Working temperature: 0 - 45 °C / 32 - 113 °F
Maximum relative humidity: 95% without condensation
Inputs
Flow meter 0.00-9999 m3/h / gph NPN isolated
Flow meter (power supply) 12 VDC (100 mA)
pH sensor 0.00 - 14.00 Isolated
pH/EC temperature sensor 0.0 - 100ºC / 32.0 - 212 F PT100
Remote input ON/OFF 12-24 V AC/DC
Flow detector ON/OFF NPN isolated
Outputs
Relay 1 Alarm N.A. 230 V AC 1 A
Relay 2 Alarm N.A. 230 V AC 1 A
Relay 3 Alarm N.A. 230 V AC 1 A
Relay 4 Control N.A. 230 V AC 1 A
Relay 5 Control N.A. 230 V AC 1 A
4-20 mA 1 Control or record max. 520 Ohms
4-20 mA 2 Control or record max. 520 Ohms
Communications
RS485 port ModBus

6
Conguration
pH 7.60 SP 7.00
Out 1 021%
Out 2 070%
m3h 10.5
CONFIG 21.3ºC
pH 7.60 SP 7.00
Out 1 021%
Out 2 070%
m3h 10.5
CONFIG 21.3ºC
PH
m3h 10.5
7.6
01
01
ACID ALK.
PH
m3h 10.5
7.6
01
01
ACID ALK.
4. OPERATION
4.1 Main screen and navigation
Conrm
Exit without
conrming
Increase / decrease value,
and move up /down
Move left / right
ENT
ENT
ESC
Regulating
output 1
Move the cursor to select the following menu:
pH, m3h or CONFIG, and enter with ENTER
Warnings on the main screen:
Flashing reading: pH alarm
Flashing regulation output: no device detected on the 4-20 mA output
Flashing regulation outputs (both): remote control deactivated, or no
device connected to the 4-20 mA outputs
Press ENTER to edit the setpoint
or move the cursor to enter the
following menu:
CAL: Calibration
CONTROL: control output
ALARM: alarms
REGISTER: output for register
pH regulation
output
Flow rate reading
Access to the Conguration menu
Calibration menu
Alarm menu
Control menu
Register menu
Cursor
Regulating
output 2
pH
CAL
CONTROL
ALARM
REGISTER
SP 07.00
PH CAL.
Point 1 07.00
Point 2 04.00
Reading 07.23
PH CONTROL
CONTROL
PI CONTROL
PH ALARM
Rearm: Yes; No
Stop: pH; All; None
pH + 1.00 025 s
pH - 0.50 060 s
PH REGISTER
Out: 4-20 mA 2
4 mA: 00.00
20 mA: 14.00

7
Conguration
ENT ENT
pH
CAL
CONTROL
ALARM
REGISTER
SP 07.00
4.2 Setpoint conguration
Setting the desired values for pH for the two control channels by reference values or setpoints for alarm.
To enter the setpoint:
change the value with the up/down
arrows and conrm with ENT
4.3 Calibration
Calibration of the sensors used for pH and ow rate. The calibration menu is in each parameter menu.
4.3.1 pH calibration
ENT ENT
pH
CONTROL
ALARM
REGISTER
SP 07.00
PH CAL.
Point 1 07.00
Point 2 04.00
Reading 07.23
PH CAL.
Point 1 07.00
Point 2 04.00
Reading 07.23
If necessary for pH calibration point 1, modify the bu󰀨er value using the up/down arrows. Insert the sensor
into the point 1 bu󰀨er, wait until the sensor reading is stable and conrm with ENTER.
Repeat the operation with the point 2 bu󰀨er. Before putting the sensor in the point 2 bu󰀨er, clean the
sensor with distilled water and dry it well (with tissue paper) to avoid contamination of the bu󰀨er. If at any
time during the calibration process you are not sure of the calibration, you can exit without conrming by
pressing ESCAPE.
CAL
4.3.2 Flow rate calibration
ENT
m3h 0.20 %
SP
CAL
CONTROL
ALARM
ALARM DETECTOR
REGISTER
Q CAL.
Type: Low Freq
K: 5.00 l/p
Time Q=0: 015 s
Select the type of ow meter:
- Low Freq:
Low frequency ow meter. Flow meters with pulse frequencies of between a minimum of 1 pulse every
200 seconds and a maximum of 30 pulses per second (30 Hz).

8
Conguration
4.4 Control conguration
4.4.1 Activation of the control
ENT ENT ENT
pH SP 07.00
CAL
CONTROL
ALARM
REGISTER
PH CONTROL
CONTROL
PI CONTROL
- pH control:
For enabling/disabling pH regulation. Dosing will be regulated automatically to adjust the pH reading to
the value entered as the pH setpoint.
- Out1:
Choose between the two 4-20 mA channels for analogue regulation or between the relay outputs for ON/
OFF regulation.
Out = 4-20 mA. For in-line process control. This is more precise regulation, which requires a pump with a
4-20 mA analogue input, such as a Dositec mA, Dostec AC or Dostec with variable frequency drive.
Out = Relay. For control in a recirculating tank. The regulating output establishes 5-minute cycles in
PH CONTROL
Out 2: 4-20 mA 2
Limit out 2: 080%
Pump 2: 1200 l/h
PH CONTROL
OUT 1
OUT 2
PH CONTROL
Control: ON
Out 1: 4-20 mA 1
Limit out 1: 080%
Pump 1: 1590 l/h
Hyst. ±: 0.99
- K (l/p):
This type of ow meter requires entry of the conguration value the manufacturer indicates in litres/pulse.
- Time Q=0:
In these ow meters, which calculate the ow rate from the time between two consecutive pulses, a wait
time from which the ow rate is considered to be zero needs to be dened.
- High Freq:
High frequency ow meter for Hall e󰀨ect or electromagnetic insertion ow meters with a maximum of
300 Hz (300 pulses per second).
- K-factor (p/l):
This type of ow meter requires entry of the K-factor (pulses/litre), corresponding to the diameter where it
is installed. This value is supplied by the manufacturer.

9
Conguration
OFF
ON
5’
025% 50% 75% 10’
Salida al 100%
25% 50% 75%
Salida al 25%
OFF
ON
5’
025% 50% 75% 10’
25% 50% 75%
- Limit out:
If a 4-20 mA output is used, this parameter allows you to limit the output value so as to limit the maximum
dosing pump ow rate.
- Pump:
Enter the rated dosing pump ow rate to record the dosed ow rate in the data logger.
- Hysteresis
For neutralisation with acid and base, enables a margin to be set around the setpoint where no regulation
will take place.
which the output will be ON for the proportional part of the time corresponding to the regulating output.
4.4.2 Advanced control conguration. PIQ control
For adjustment of pH, the control system operates using a PI algorithm. The setting parameters for this
control are in the PI CONTROL menu
PH CONTROL
CONTROL
PI CONTROL ENT
PH PI CONTROL
PIQ (PpH)
030
Kp: 20
Ki:
30
T delay: 020 s
Q test: 00.00 m3h
- PIQ (PpH):
The PIQ control mode to adjust pH is a PI algorithm conditioned on the ow rate of water to be treated.
Initial dosing proportional to the water rate is set using the PpH parameter, and is subsequently corrected
by means of a PI approximation curve. This system, which can only be activated with independent pumps
(type mA outlets for acid/alkaline dosing), ensures pH stability even with highly variable ow rates and
provides greater agility in reaching and maintaining the
setpoint.
PpH=0 PI control. PIQ control disabled.
PpH= 1 - 200 Acid dosing will be proportional to the water ow rate with setpoint adjustment by means
of a PI algorithm. The proportion is indicated by the PpH parameter and is referenced to 100,000 units of
water ow.

10
Conguration
T delay
Injection
point Sensor
m/s
Example: For a ow rate of 200,000 l/h of water and a PpH = 1, proportional dosing of acid will be: (1 /
100,000) x 200,000 l/h = 2 l/h
The proportion needed to achieve a specic pH will depend not only on its nature and concentration, but
also on the nature of the water to be treated and the rest of the dosed products that can inuence this
parameter.
- Kp:
Proportional constant for the control. This parameter enables adjustment of the amount of device
response based on the di󰀨erence between the reading and the setpoint (Error). A value that is too high
can produce a reaction that is too abrupt for the system and exceed the setpoint value in the tank, leading
to a risk situation. A value that is too low will produce a slow approach to the setpoint.
- Ki:
Integral PI adjustment. This parameter acts on the accumulated error and enables reading stabilisation
once the setpoint value has been achieved. It is only valid for in-line controls. For recirculating controls it
must be Ki=0.
- T delay (seconds):
T delay is the time between two consecutive controller orders to position the regulating output. For a
proper regulation, this time has to be greater than it takes fro a drop of dosed product to travel from the
injection point to the point where the pH or EC sensor is located.
- Q test:
Reference ow rate for T delay that allows for automatic adjustment of T delay with changes in water ow
rate, so that T delay is always at an optimal value. To keep T delay xed, leave Qtest = 0.
Example: In a 8" pipe through which water passes at 100 m3/h, the water speed is approximately 1 m/s.
If the distance between the injection point and the sensor is 10 metres, the installation delay time is 10
seconds.
The sensor will have a reaction time (approximately 10 seconds for the pH sensor), which must be added
to the installation delay time. Therefore, a T delay = 20 seconds should be set.