ProMinent DULCOMETER D2C User manual

pH/Cl
0.45
ppm
START
STOP
DULCOMETER
7.00
pH
2
Operating Instructions
DULCOMETER®D2C
Part 2: Adjustment and Operation,
Measured Variables pH/chlorine
ProMinent®
D2C2-001-pH/chlorine-GB
Part No. 987855 ProMinent Dosiertechnik GmbH ·69123 Heidelberg ·Germany BA DM 135 08/06 GB
Please completely read through operating instructions! •Do not discard!
The warranty shall be invalidated by damage caused by operating errors!
Please enter the identity code of your device here!
D2C A ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___
type W
START
STOP
DULCOMETER
pH/
Cl
2
0.45
ppm
7.00
pH
type D

2
1 Device Identification / Identity Code
D2C A
Please enter the identity code of your device here!
D2C A DULCOMETER®controller Series D2C
WWall mounting
DPanel mounting (96 x 96 mm)
Operating voltage
0230 V 50/60 Hz
1115 V 50/60 Hz
424 V AC/DC
Measured variable 1/Measured variable 2
PC pH (0-14 pH) / Chlorine (0...0,5/2/5/10/20/50/100 ppm)
Connection of meas. variable 1 (connection meas. variable 2: 4-20 mA)
1Terminal standard signal 4–20 mA (signal converters are necessary)
2SN6 plug connector
5Terminal mV
Correction variable (Temperature for pH)
0None
2automatically (Pt 100 via terminal)
4manual
Disturbance variable connection
0None
Signal output
0None
42Standard signal outputs 0/4-20 mA, free programmable
Power control
GAlarm and 2 limit relay
MAlarm and 2 solenoid valve relays
(pulse length control)
Control characteristic
1Proportional control
2PID control
Protocol output
0None
Language
DGerman
EEnglish
FFrench
SSpanish
ASwedish
NDutch

3
2Contents / General User Information
Page
1 Device Identification / Identity Code ................................................................................................... 2
2 General User Information ...................................................................................................................... 3
3 Device Overview / Controls................................................................................................................... 4
4 Functional Description ......................................................................................................................... 5
5 Display Symbols ................................................................................................................................... 6
6 Operating ............................................................................................................................................... 7
7 Operating Menu / Overview .................................................................................................................. 8
8 Operating Menu / Description ............................................................................................................. 11
9 Technical Terms .................................................................................................................................. 22
10 Troubleshooting .................................................................................................................................. 23
General User Information
These operating instructions describe the technical data and function of the series DULCOMETER®D2C
controller, provide detailed safety information and are divided into clear steps.
IMPORTANT
•Please observe the parts of these operating instructions applicable to your particular
version! This is indicated in the Section “Device Identification/Identity Code”.
•Correct measuring and dosing is only possible in the case of impeccable operation of the
probe. The probe has to be calibrated/checked regularly!
•In the event of a probe failure, uncontrolled chemicals addition may result. We therfore
recommend urgently to activate “check out time limits” with automatic control shut-off!
NOTE
A form “Documentation of controller settings Type D2C” is available under
www.prominent.com/documentation_D2C for the purpose of documenting the controller
settings.

4
UP button
To increase a displayed numerical value
and to change variables (flashing
display)
BRANCH BACK button
Back to permanent display or to start
of relevant setting menu.
DOWN button
To decrease a displayed numerical
value and to change variables (flashing
display).
CHANGE button
To change over within a menu level
and to change from one variable to
another within a menu point.
START/STOP button
Start/stop of control and metering
function.
ENTER button
To accept, confirm or save a displayed
value or status. For alarm acknow-
ledgement.
3Device Overview / Controls
D2C2-002-pH/chlorine-GB
®
DULCOMETER
®
STOP
START
Graphic display
"Start/Stop"
button
"Enter"
button
"Up"
button
"Change"
button
"Down"
button
"Branch back"
button
Display field
Measured variable
pH/chlorine
pH/Cl2
STOP
START

5
4Functional Description
NOTE
Please refer to the description of the operating menu for a detailed description of the
individual characteristics of the DULCOMETER®D2C controller!
4.1 Operating Menu
The DULCOMETER®D2C controller permits settings to be made in two different menus. All values are
preset and can be changed in the complete operating menu.
The controller is delivered with a restricted operating menu so that the D2C controller can be used
effectively in many applications from the very onset. If adaptations prove to be necessary, all relevant
parameters can then be accessed by switching over to the complete operating menu.
4.2 Access Code
Access to the setting menu can be prevented by setting up an access code. The D2C controller is supplied
with the access code 5000 which permits free access to the setting menu. The calibration menu remains
freely accessible even when access to the setting menu is blocked by the code.
4.3 Control
The D2C can operate as a proportional controller or as a PID controller - dependent on the device version
(see identity code) and the setting.
The controlled variable is recalculated every second. Control procedures which require rapid correction of
setpoint deviations (less than approx. 30 seconds) cannot be processed with this controller. The solenoid
valve control (pulse on-time) must take account of the cycle times.
The control function (reference variable output) can be switched off through the pause function and the
water control input. The calculation of the regulated variable starts again with the cessation of the "pause"
after expiry of the adjustable delay time "td". No fault treatment is performed with active "pause" function.
4.4 Fault messages
Faults to be acknowledged are shown in the permanent displays 1, 3 and 4 by the symbol " ". The
corresponding fault messages and notes are shown in the permanent display 2. Faults/notes continuing
after acknowledgement are shown alternatively. Faults automatically remedied throught changing operating
conditions are removed from the permanent display without necessitating acknowledgement. Chapter 11
includes an overview of fault messages and causes.

6
The display of the DULCOMETER®D2C controller uses the following symbols:
Symbol Description Comment
Limit value transgression measured value 1 Symbol
Relay 1 upper or zone left
Symbol
Relay 1 lower left
Limit value transgression measured value 2 Symbol
Relay 2 upper or zone right
Symbol
Relay 2 lower right
Metering pump measured value 1 Symbol
Control OFF left
Symbol
Control ON left
Metering pump measured value 2 Symbol
Control OFF right
Symbol
Controll ON right
Solenoid valve measured value 1 Symbol
Controll OFF left
Symbol
Controll ON left
Solenoid valve measured value 2 Symbol
Controll OFF right
Symbol
Control ON right
Stop button pressed
Manual metering
pause Delay time "td" Control starts after
expiry of "td"
Fault
5Display Symbols

7
Selection 1
Selection 2
CHANGE from selection to selection
Change numbers or
settings of selection
Variables flash
ENTER and save setting,
continue to next menu
BRANCH BACK without
saving setting
BRANCH BACK to
start of setting
Text 1
Text 2
Text 1
Text 2
Selection 1
Selection 2
Access code, correct
Parameter
setting
Calibration notes
Permanent
display 1
Permanent
display 4
Calibration
menu
Various
Access code
Setting menus
The various menus are
selected with the CHANGE
button
The menu is started with
the ENTER button
BRANCH BACK to
permanent display or to
relevant setting menu
Permanent
display 2
Permanent
display 3
NOTE
Access to the setting menus can be barred with the access code!
The number and scope of setting menus is dependent on the device version!
If the access code is selected correctly in a setting menu, then the following setting menus are also
accessible!
If within a period of 10 minutes no button is pushed, the unit automatically branches back from the
calibrating menu or a setting menu to the permanent display 1.
6Operation
D2C2-007-pH/chlorine GB
D2C2-008-pH/chlorine-GB

8
7Operating Menu / Overview
The setting menus highlighted in grey and the adjustable parameters are only visible in the complete
operating menu.
priming acid
press -key
*
pump on
control stop !
limit 2 lower
6.50 pH
limit 1 upper
8.00 pH
7.20
0.45
pH
ppm
value 1 7.20 pH
value 2 0.45 ppm
temp.: 23.5 °C
stop-key
value 2 0.45 ppm
s. point 0.45 ppm
ctrlout 0 %
value 1 7.00 pH
s. point 7.20 pH
ctrlout 0 %
temp.: 23.5 °C
calibration pH
zero p.: -3,1 mV
slope at 25 °C
58.32 mV/pH
calibration? calibration pH
buffer 1: 7.00 pH
mea. val: 7.00 pH
signal: -3,1 mV
calibration pH
calib. 1 active
please wait!
-3.1 mV 23.5 °C
calibration pH
buffer 2: 4.00 pH
mea. val: 4.00 pH
signal: 157 mV
calibration pH
calib. 2 active
please wait!
157 mV 23.5 °C
calibration
end?
limit
value 1 pH
limits
setting?
calibration Cl2
zero p.: 4.00 mA
slope:
6.00 mA/ppm
only with relay
calibration pH
probe in buffer
buffer: 7.00 pH
temp.: 23.5 °C
calibration pH
probe in buffer
buffer: 4.00 pH
temp.: 23.5 °C
only with measuring
range 0,5 ppm
limit relay LV2
- active closed
∆t on 0 s
∆t off 0
s
hysteresis limit:
0.20 pH
checkout time
limit: off
limit 2 lower
8.00 pH
limit 1 upper
6.50 pH
priming chlor
press -key
*
pump on
control stop !
calibration Cl2
zero p.: 4.00 mA
slope:
6 mA/ppm
calibration pH
zero p.: -3,1 mV
slope at 25 °C
53.70 mV/pH
calibration Cl2
zero point:
0.45 ppm
calibration Cl2
zero point
value take over?
4.01 mA
calibration Cl2
DPD-value
0.45 ppm
calibration Cl2
DPD-value:
0.45 ppm

9
Operating Menu / Overview
relay
setting?
relay 1
meas. value 1 pH
relay 2
meas. value 2
chlorine
relay end
solenoid valve 2
- chlorine
period 10 s
min. time 1 s
solenoid valve 1
- acid
period 10 s
min. time 1 s
relay 1
relay adjustment
- limit
relay 2
relay adjustment
- limit
pumps
setting?
pumps
dosing direction
pump 1 acid
pump 2 chlorine
dosing pump max.
pump 1: 180
pump 2: 180
pulse/minute
setpoint
0.40 ppm
dosing direction:
chlorine
setpoint
7.20 pH
dosing direction:
acid
control
value 2 chlorine
control
end
control setting? control
value 1 pH
control
automatic
dosing direction
acid manual dosing
0 %
dosing direction:
acid
ctrl parameter
xp = 10 %
Ti= off
Td= off
ctrl parameter
xp = 10 %
Ti= off
Td= off
additional load:
0 %
dosing direction:
acid
control
automatic
dosing direction
chlorine manual dosing
0 %
dosing direction:
chlorine
additional load:
0 %
dosing direction:
chlorine
limit
end
only with relay
hysteresis limit:
0.04 ppm
checkout time limit:
off
limit value
2 chlorine
limit relay: LV1
- active closed
∆t on 0 s
∆t off 0 s
limit 2 lower
0.60 ppm
limit 1 upper
0.10 ppm
limit 2 lower
0.60 ppm
limit 1 upper
0.10 ppm

10
Operating Menu / Overview
correction value
setting?
measuring range
chlorine setting?
measuring range
0 ... 2.00 ppm
mA output 1
pH
mA outputs
setting?
mA output 1
measured value
4 mA = 2.00 pH
20 mA = 12.00 pH
mA output 1
acid
4 mA = 0 %
20 mA = 100 %
mA output 1
pH
measured value
4 ... 20 mA
mA output 1
correction value
4 mA = 0.0 °C
20 mA = 100 °C
mA output 2
chlorine
mA output
end
mA output 2
chlorine
measured value
4 ... 20 mA
mA output 2
measured value
4 mA = 0.00 ppm
20 mA = 2.00 ppm
mA output 2
chlorine
4 mA = 0 %
20 mA = 100 %
Ident-Code: D2CA
W 0 PC 1000 A 10 E
software version
D2C-A1 FW.2.10
general setting
information
alarm relay
active
pause
- active closed
- alarm off
- td: 10 min.
correction value
temperature
automatic
23.5 °C
Permanent display 1
control input
- active closed
- sample flow
control input
- active closed
- Cl const. load
0 %
control input
- active closed
- high chlorine
1.50 ppm
access c.: 5000
operating menu:
- english
- complete

11
Permanent displays
8Operating Menu / Description
The permanent displays 1 to 4 serve information on fault messages/causes (see also table on page 22) as
well as on operating values/settings.
Calibration
Calibration of pH probe:
The calibration of the pH probe uses a two-point calibration method (zero point, slope). As buffer pH 7 (zero
point calibration) and pH 4 (slope calibration) are factory-set. If other buffers are to be used, the defaults in
the complete operating menu (menu A, B) may be altered. During calibration control is stopped and
metering is reduced to the set base load. The output 0/4...20 mA (measuring value) will be frozen. After
successful calibration, all fault determinations relating to the measuring value are started again. The current
probe data (zero point/slope) will be displayed.
7.20
0.45
pH
ppm
value 1 7.20 pH
value 2 0.45 ppm
stop-key
value 2 0.45 ppm
s. point 0.45 ppm
ctrlout 0 %
value 1 7.00 pH
s. point 7.20 pH
ctrlout 0 %
calibration pH
zero p.: -3,1 mV
slope at 25 °C
58.32 mV/pH
calibration? calibration pH
buffer 1: 7.00 pH
mea. val: 7.00 pH
signal: -3,1 mV
calibration pH
calib. 1 active
please wait!
-3.1 mV 23.5 °C
calibration pH
buffer 2: 4.00 pH
mea. val: 4.00 pH
signal: 157 mV
calibration pH
calib. 2 active
please wait!
157 mV 23.5 °C
calibration pH
probe in buffer
buffer: 7.00 pH
temp.: 23.5 °C
calibration pH
probe in buffer
buffer: 4.00 pH
temp.: 23.5 °C
calibration pH
zero p.: -3,1 mV
slope at 25 °C
53.70 mV/pH
A
B

12
Calibration of the chlorine probe
The calibration (slope calibration) of the chlorine probe uses the DPD method. When starting calibration,
the frozen measuring value is proposed; this value may be adjusted to the measured DPD value using the
Up and Down buttons. A calibration will only be possible if the DPD value is ≥2% of the measuring range.
During calibration, control function and metering are maintained. After successful calibration, all fault
determinations relating to the measuring value are started again.
With a measuring range adjusted to 0 - 0.5 ppm, the zero point may be calibrated in the entire operating
menu in addition to the slope. The zero point calibration should be performed under realistic condition with
chlorine-free water. In this case, control will be stopped and metering will be reduced to the set base load.
The output 0/4...20 mA (measuring value) will be frozen.
IMPORTANT
The measuring range of the chlorine probe must correspond to the adjusted measuring
range of the DULCOMETER®D2C (factory setting 0 - 2.00 ppm). A possible alteration of the
measuring range (see page 19) must be done prior to calibration. If the measuring range is
altered, all settings are reset to the factory settings.
Operating Menu / Description
Error message Condition Effect
During calibration procedure:
Buffer distance too small ∆Buffer <2 pH Recalibrate buffer 2!
Return to permanent display:
pH zero point low < -60 mV Basic metering load Warning, old zero point and slope retained
pH zero point high < +60 mV " "
pH slope low <45 mV/pH " "
pH slope high >65 mV/pH " "
Measured value pH unsteady "
Possible values
Initial value Increment Lower value Upper value Remarks
Buffer values pH 7 0.01 pH -2 pH 16 pH Error messages when both buffers
pH 4 too close (<2 pH-values)

13
calibration
end?
calibration Cl
2
zero p.: 4.00 mA
slope:
6.00 mA/ppm
only with measuring
range 0,5 ppm
calibration Cl
2
zero p.: 4.00 mA
slope:
6 mA/ppm
calibration Cl
2
zero point:
0.45 ppm
calibration Cl
2
zero point
value take over?
4.01 mA
calibration Cl
2
DPD-value
0.45 ppm
calibration Cl
2
DPD-value:
0.45 ppm
Possible values
Initial value Increment Lower value Upper value
DPD-value measured value 0.01 ppm 0 ppm 20 ppm
zero point measured value (mA) – – –
Operating Menu / Description
Error message Condition Effect
Calibration Cl not possible Cl slope too low Repeat calibration
probe slope too low (<25% of standard slope)
Calibration Cl not possible Cl slope too high Repeat calibration
probe slope too high (>300% of standard slope)
DPD value too low DPD <2 % of measuring range Repeat calibration after addition of
DPD > x.xx ppm chlorine
Zero point too high probe signal >5 mA Repeat calibration in chlorine-free
water
Zero point too low probe signal <3 mA Check probe connection
replace probe, if necessary
Priming
Metering pumps without an integrated electronic controller need to be commissioned after changing a tank
or when starting up the metering equipment for the first time.
It is essential to prime (filling the pump and suction line with chemical) and completely vent the discharge
line up to the discharge valve for the metering equipment to function correctly (see operating instructions
for metering equipment and pump!)

14
limit 1 lower
6.50 pH
limit 2 upper
8.00 pH
limit 1 lower
6.50 pH
limit 2 upper
8.00 pH
limit
value 1 pH
limits
setting?
only with relay
limit relay LV2
- active closed
∆t on 0 s
∆t off 0
s
hysteresis limit:
0.20 pH
checkout time
limit: off
limit 1 lower
0.10 ppm
limit 2 upper
0.60 ppm
limit 1 lower
0.10 ppm
limit 2 upper
0.60 ppm
limit
end
only with relay
hysteresis limit:
0.04 ppm
checkout time limit:
off
limit value
2 chlorine
limit relay: LV1
- active closed
∆t on 0 s
∆t off 0 s
To carry out this function, see priming menu.
Priming:
or
priming acid
press -key
*
pump on
control stop !
priming chlor
press -key
*
pump on
control stop !
To prime with pH corrective agent or oxidant, press the change key to access the Prime (acid/alkali) or
Prime oxidant settings menu. Press the Up key, the control variable will jump to 100 % and the pump will
run for approx. 30 sec. The same applies if the Start/stop key is pressed or if metering stops due to an error
signal.
Stop priming:
press any key
Every time you press the Up key the pump will prime for approx. 30 seconds.
Recommence control:
Access permanent display 1 and press the Start/stop key.
Limits
When setting the check out time, metering of the corresponding pump is stopped and an alarm is triggered
through the alarm relay in the event of limit violations exceeding the set check out time.
For devices with limit relays, a limit value or a zone may be set for each measuring value, where the relay will
switch.
Operating Menu / Description

15
Operating Menu / Description
Possible values
Initial value Increment Lower value Upper value Remarks
Type of limit transgression Limit transgression
Measured value 1 pH upper upper when exceeding or
lower dropping below value
Measured value 2 chlorine lower upper
lower
Limit value
Measured value 1 pH pH 8 pH 0.01 pH -2 pH 16
pH 6.5 pH 0.01 pH -2 pH 16
Measured value 2 chlorine 0.1 ppm 0.01 ppm 0.00 ppm upper limit
0.6 ppm 0.01 ppm 0.00 ppm measuring range
Limit relay 1 pH LV 1 LV 1
LV 2
zone*
off
Limit relay 2 chlorine LV 1 LV 1
LV 2
zone*
off
Limit relays 1,2 active active
closed closed
active
open
Switch-on delay* ∆t on 0 s 1 s 0 s 9999 s
Switch-off delay* ∆t off 0 s 1 s 0 s 9999 s
Hysteresis limits Is active in the direction
measured vlaue 1 pH 0.2 pH 0.01 pH 0.02 pH 16 of cancellation of limit
measured vlaue 2 0.04 ppm 0.01 ppm 0.02 ppm 2.20 ppm violation.
Checkout time limits off 1 s 1 s 9999 s Results in message and alarm
and shutting-off of the
corresponding metering.
Off: function off,
no message, no alarm.
*with regard to the setting
"zone", the difference between
the limits and the set
hysteresis should be ≥3x.

16
Possible values
Initial value Increment Lower value Upper value Remarks
Control normal normal xp referred to pH 14
manual (measured value 1)
xp referred to
measuring range
Setpoint (measured value 2)
measured value 1 pH pH 7.20 pH 0.01 pH 0 pH 14
measured value 2 0.40 ppm 0.01 ppm -0.20 ppm 2.20 ppm
chlorine
Control parameter xp 10 % 1 % 1 % 500 %
Control parameter Ti off 1 s 1 s 9999 s
Control parameter Td off 1 s 1 s 2500 s
Additional load 0 % 1% 0 % +100 %
Manual metering 0 % 1% 0 % +100 %
Operating Menu / Description
Control
setpoint
0.40 ppm
dosing direction:
chlorine
setpoint
7.20 pH
dosing direction:
acid
control
value 2 chlorine
control
end
control setting? control
value 1 pH
control
automatic
dosing direction
acid
manual dosing
0 %
dosing direction:
acid
ctrl parameter
xp = 10 %
Ti= off
Td= off
ctrl parameter
xp = 10 %
Ti= off
Td= off
additional load:
0 %
dosing direction:
acid
control
automatic
dosing direction
chlorine
manual dosing
0 %
dosing direction:
chlorine
additional load:
0 %
dosing direction:
chlorine

17
Pumps
The maximum stroke value of the metering pumps should correspond to the stroke frequency of the
metering pump used.
pumps
setting?
pumps
dosing direction
pump 1 acid
pump 2 chlorine
dosing pump max.
pump 1: 180
pump 2: 180
pulse/minute
Possible values
Initial value Increment Lower value Upper value Remarks
Max. stroke/minute of 180 1 1 500 off = 0 strokes/min
pumps 1 and 2
Operating Menu / Description
Relays
Allocation of the two relays with regard to the function (limit, actuator, solenoid valve) is freely selectable. If
the function is set to actuator or solenoid valve, the relays will be set inactive in the case of fault in order to
avoid faulty metering.
relay
setting?
relay 1
meas. value 1 pH
relay 2
meas. value 2
chlorine
relay end
solenoid valve 2
- chlorine
period 10 s
min. time 1 s
solenoid valve 1
- acid
period 10 s
min. time 1 s
relay 1
relay adjustment
- limit
relay 2
relay adjustment
- limit

18
Operating Menu / Description
Possible values
Initial value Increment Lower value Upper value Remarks
Relay 1
Measured value 1 pH
Relay adjustment limit Limit
Actuator* *e.g. motor pump
Solenoid valve Relay is deactivated in
off case of fault and during
Relay 2 calibration
Measured value 2 chlorine
Relay adjustment limit Limit
Actuator*
Solenoid valve
Solenoid valve off
Period 10 s 1 s 10 s 9999 s
Min. time 1 s 1 s 1 s period/2
correcting value
setting?
correcting value
temperature
automatic
33 °C
Correction value (measured value 1 pH)
Possible values
Initial value Increment Lower value Upper value Remarks
Type of temperature as per identity manual Change-over only if pursuant
compensation code automatic to identity code = automatic
off
Manual temperature 25 °C0.1 °C0°C100 °C
compensation

19
mA output 1
pH
mA outputs
setting?
mA output 1
measured value
4 mA = 2.00 pH
20 mA = 12.00 pH
mA output 1
acid
4 mA = 0 %
20 mA = 100 %
mA output 1
pH
measured value
4 ... 20 mA
mA output 1
correction value
4 mA = 0.0 °C
20 mA = 100 °C
mA output 2
chlorine
mA output
end
mA output 2
chlorine
measured value
4 ... 20 mA
mA output 2
measured value
4 mA = 0.00 ppm
20 mA = 2.00 ppm
mA output 2
chlorine
4 mA = 0 %
20 mA = 100 %
measuring range
chlorine setting?
measuring range
0 ... 2.00 ppm
Possible values
Initial value Increment Lower value Upper value Remarks
Measuring range 0...2 ppm 0...2 ppm
0...0.5 ppm
0...5 ppm
0...10 ppm
0...20 ppm
0...50 ppm
0...100 ppm
Operating Menu / Description
Measuring chlorine
The measuring range (factory setting 0-2.00 ppm) must correspond to the chlorine measuring cell used.
The factory setting (limits, setpoint...) is reset if the measuring range is altered.
Outputs 0/4 - 20mA
The mA outputs may be used either for documentation of the measuring value or as regulated value. When
the regulated value is set, the metering direction selected in "control" will be automatically used!

20
Operating Menu / Description
Possible values
Initial value Increment Lower value Upper value Remarks
Variable allocation Measured value Measured value
Regulated value
Correcting value
Output range 4…20 mA 0…20 mA
4…20 mA
Range
measured value 1 pH pH 2…pH 12 pH 0.01 pH -2 pH 16 Minimum range pH 0.1
Range regulated
variable 0 %…+100 % 1 % 0 % +100 % Minimum range 1 %
Range measured
value 1 chlorine 0...2 ppm 0.01 ppm 0.2 ppm 2.20 ppm Minimum range 0.1 ppm
Range regulated
variable 0 %…+100 % 1 % 0 % +100 % Minimum range 1 %
General settings
Alarm relay
The alarm relay may be activated / deactivated. When deactivated, no fault message is displayed.
Pause function
With regard to the pause, a delay time "td" may be set. The control will start again only after cessation of the
pause contact and expiry of the preset delay time. When the delay time is elapsing, a clock symbol will be
displayed. The pause function may be reset by pressing the start / stop button.
The mA output measuring value will be frozen when the pause function is activated.
Control input
The control input may be used for fault messages for sample water, high chlorination or base load metering
chlorine. In the event of fault message for sample water, control will be stopped, metering will be set to
base load, and the alarm relay will be activated. If high chlorination is set, the control signal sets metering
to maximum frequency until the preset specified value for high chlorination is reached. This function will
only be available if metering direction is set to chlorine. If base load is set, a control signal will apply a base
load to the chlorine pump. This base load will be maintained for the duration of the control signal.
Operating menu
All setting menus may be accessed by switching from reduced to complete. We recommend to set the
reduced menu again after commissioning.
Access code
If the access code (factory-set to 5000) is altered, no settings (with the exception of cali-bration) may be
carried out without entering the correct code.