ProMinent Dulcometer D1C Operating Instructions Manual

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Part No. 987926 ProMinent Dosiertechnik GmbH · D-69123 Heidelberg · Germany BA DM 085 08/01 GB

Operating Instructions

DULCOMETER® D1C

Part 2: Adjustment and Operation,
Measured Variable Conductivity

ProMinent

®

D1C2-Leit.-001-GB

Please completely read through operating instructions! · Do not discard!

The warranty shall be invalidated by damage caused by operating errors!

2

Please enter the identity code of your device here!

1 Device Identification / Identy Code

D1C A L 0 E

D1C A DULCOMETER® Controller Series D1C / Version A

Type of mounting

D Control panel installation 96 x 96 mm

W Wall mounting

Operating voltage

0 230 V 50/60 Hz
1 115 V 50/60 Hz
2 200 V 50/60 Hz (only with control panel installation)
3 100 V 50/60 Hz (only with control panel installation)
4 24 V AC/DC

Measured variable

L Conductivity

Connection of measured variable

1 Terminal, standard signal 0/4-20 mA
3 Terminal, conductive conductivity

Correction variable

0 None
2 Temperature via terminal (PT 100)
3 Temperature via standard signal 0/4-20 mA
4 Manual temperature entry

Feed forward control

0 None
1 As standard signal 0/4-20 mA
2 As frequency 0-500 Hz
3 As frequency 0-10 Hz

Control input

0 None
1 Pause

Signal output

0 None
1 Standard signal 0/4-20 mA measured value
2 Standard signal 0/4-20 mA control variable
3 Standard signal 0/4-20 mA correction variable
4 2 standard signal 0/4-20 mA output, free programmable

Power control

A Alarm relay

G Alarm and 2 limit value relays
M Alarm and 2 solenoid value relays
R Alarm relay and servomotor with feedback

Pump control

0 None
2 Two pumps

Control characteristic

0 None
1 Proportional control
2 PID control

Log output

0 None

Language

DGerman
E English
F French

I Italien
N Dutch
S Spanish
P Polish
ASwedish
B Portuguese
U Hungarian

3

2 Contents / General User Information

Page

Device Identification / Identity Code ............................................................................................................. 2

General User Information ............................................................................................................................... 3

Device Overview / Controls ........................................................................................................................... 4

Functional Description ................................................................................................................................... 5

Display Symbols ............................................................................................................................................. 6

Operation ........................................................................................................................................................ 7

Restricted Operating Menu ............................................................................................................................ 8

Overview ................................................................................................................................................ 8

Layout .................................................................................................................................................... 9

Description .......................................................................................................................................... 10

Complete Operating Menu ........................................................................................................................... 14

Overview .............................................................................................................................................. 14

Description .......................................................................................................................................... 15

EC Declaration of Conformity ...................................................................................................................... 27

Troubleshooting ........................................................................................................................................... 28

General User Information

These operating instructions describe the technical data and function of the series DULCOMETER® D1C
controller, provide detailed safety information and are divided into clear steps. The activities to be carried
out are identified by bold bullets (•).

IMPORTANT:

Please observe the parts of these operating instructions applicable to your particular
version! This is indicated in the Section “Device Identification / Identity Code”!

IMPORTANT:

Correct measuring and dosing is only possible in the case of impeccable operation of the
probe. The probe has to be calibrated / checked regularly!

4

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DULCOMETER

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Graphic display

Push-button
"Start/stop"

Push-button
"Enter"

Push-button
"Up"

Push-button

"Change display"

Push-button

"Down"

Push-button

"Branch back"

Display field
Measured variable
Conductivity

CHANGE DISPLAY menu button

To change over within a menu level
and to change from one variable to
another within a menu point.

START/STOP menu button

Start/stop of control and metering
function.

ENTER menu button

To accept, confirm or save a
displayed value or status. For alarm
acknowledgement.

UP menu button

To increase a displayed numerical
value and to change variables
(flashing display)

BRANCH BACK menu button

Back to permanent display or to start
of relevant setting menu.

DOWN menu button

To decrease a displayed numerical
value and to change variables
(flashing display).

3 Device Overview / Controls

D1C2-Leit.-002-GB

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4 Functional Description

NOTE
Please refer to the description of the complete operating menu in Section 8 for a detailed

description of the individual characteristics of the D1C controller!

4.1 Operating Menu

The D1C 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 D1C 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 D1C 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 D1C 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 cycle
times must be taken into consideration when activating solenoid valves (pulse length) in the same way as
their running times when activating servomotors (3-point).

Via the control input pause, the control function (selection of controlled variable) can be switched off. The
calculation of the controlled variable starts again after cessation of „pause“.

4.4 Feed Forward Control

The D1C controller can process a signal of a feed forward control. Depending on the device version (see
identity code) and the setting, this signal can be obtained in any form of a 0–20 mA or 4–20 mA signal or as
a digital contact signal with the maximum frequencies 10 Hz or 500 Hz.

During start-up, the zero point has to be checked. The multiplicative feed forward control is not designed
for switching off permanently the actuating variable (signal ≈ 0).

This signal can be used, for example, for flow-proportional metering (multiplicative effect) or feed

forward-dependent basic load metering (additive effect). The result of control variable calculation from the
proportional or PID control is multiplied by or added to the feed forward signal. A multiplicative feed forward
variable at the level of the set rated value carries over the calculated control variable unchanged into the
controlled variable:

Controlled variable = Feed forward variable/rated value x calculated control variable

An additive feed forward variable at the level of the rated value results in maximum controlled variable:

Controlled variable (max. 100 %) = Feed forward variable/rated value x max. controlled variable +

calculated control variable

4.5 Error Messages

Error messages and information are indicated on the bottom line in the permanent display 1. Errors to be

acknowledged (acknowledgement switches off the alarm relay) are indicated by the symbol „ “. Errors/
notes which still apply after acknowledgement are indicated alternately. Faults which are rectified of their
own accord due to changed operating situations are removed from the permanent display without the need
for acknowledgement.

6

The display of the D1C controller uses the following symbols:

Description Comment Symbol

Limit value transgression Symbol

Relay 1, upper left

Symbol

Relay 1 lower left

Symbol

Relay 2 upper right

Symbol

Relay 2 lower right

Metering pump 1 (Increase conductivity) Symbol

Control OFF left

Symbol

Control ON left

Metering pump 2 (Reduce conductivity) Symbol

Control OFF right

Symbol

Control ON right

Solenoid valve 1 (Increase conductivity) Symbol

Control OFF left

Symbol

Control ON left

Solenoid valve 2 (Reduce conductivity) Symbol

Control OFF right

Symbol

Control ON right

Servomotor

Control, open relay

Control, close relay

Without control

Thickness of bar

Position feedback increases from left to right

during opening

Stop button pressed

Manual metering

Fault

5 Display Symbols

7

D1C2-Leit.-007-GB

Access code, correct
Parameter

setting

Permanent

display 1

Permanent

display 2

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

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.

6 Operation

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

Selection 1
Selection 2

Text 1
Text 2

Selection 1
Selection 2

D1C2-Leit.-008-GB

8

7 Restricted Operating Menu / Overview

The restricted operating menu permits simple operation of the most important parameters. The following
overview shows the settings which can be selected:

D1C2-Leit.-009-GB

Permanent display 1

Only with
solenoid valve relays

Only with control

Number and scope of setting menus

is dependent on the device

Access to setting menus can
be blocked with access code

µS/cm

100

calibration
conductivity ?

Only with connection on standard signal terminal

meas. parameter
setting ?

Only with connection on conductive conductivity terminal

relay
setting ?

control
setting ?

general setting
information

limits
setting ?

100 µS/cm

w: 1000 µS/cm

70 %
59 %

mea val.

Permanent display 2
only with control
(w=setpoint)

fd. fwd.:
reg. val.:

9

D1C2-Leit.-010-GB

Permanent display 1

100 µS/cm

w: 1000 µS/cm

70 %
59 %

µS/cm

100

SV1 cond
SV2 cond

1000 µS/cm

1000 s

Ti =
Td =

xp =

0 s

10 %

xp =

10 %

30 %

15 %

DxLxxxxxxxxxx
D1C-xx FW-xx.x

=
=

5000

Increase conductivity
Reduce conductivity

➞

➞

1000 µS/cm

1500 µS/cm

➞

➞

1500 µS/cm
1000 µS/cm

mea val.

Permanent display 2
only with control
(w=setpoint)

fd. fwd.:
reg. val.:

Positive values of setting variable:
Negative values of setting variable:

relay
setting ?

relay adjustment
relay1:
relay2:

control
Solenoid valves: SV1

SV2

limit 1

lower

limit 2

upper

limits
setting ?

control
settings ?

Only with control

control
positive cond

regulated value:
negative cond

control
current regulat.

value:

normal

30 %

control
current regulat.

value:

with dead zone

30 %

control
current regulat.

value:

manual

Control with dead zone

For normal control

PID control

Proportional control

setpoint

setpoint 2 upper

ctrl. parameter

setpoint 1 lower

ctrl. parameter

manual dosing
regulated range

general setting
information

ident-code: D1CA
software version

alarm relay access c.:

operating menu:

active

english
restricted

Only with connection on standard signal terminal

Only with connection on conductive conductivity terminal

1500 µS/cm

mr = meas. range
cc = cellconstant.

2000 µS/cm

cc :

1.000/cm

mr :

1006 µS/cm 25.0 °C

calibration
conductivity ?

calibration
conductivity:

meas. parameter
setting ?

Restricted Operating Menu / Layout

10

D1C2-Leit.-029-GB

1500 µS/cm

calibration
conductivity ?

calibration
conductivity:

D1C2-Leit.-011-GB

Permanent display 1

Permanent display 2
only with control
(w = setpoint)

Positive values of setting variable:
Negative values of setting variable:

100

Increase conductivity
Reduce conductivity

mea val.
fd. fwd.
reg. val.

59 %

70 %

w:

µS/cm

100 µS/cm

1000 µS/cm

During calibration, metering is reduced to the set basic capacity. The standard signal of the output
(measured value/correction value) is frozen.

The actually measured value will be proposed; this value is adjustable. On successful completion of
calibration, all error checks which refer to the measured value are restarted.

Restricted Operating Menu / Description

Calibration conductivity with connection on standard signal

Calibration conductivity with connection on conductive conductivity terminals

Measuring parameter

2000 µS/cm

1538 µS/cm 23.8 °C

D1C2-Leit.-030-GB

Access to all setting menus can be blocked with an access code !

mr = meas. range
cc = cellconstant.

cc :

mr :

meas. parameter
setting ?

1.120/cm

Error message Condition effect Remarks

measured value too low value < 2 % check measuring range

value > xx mS/cm of

check measuring range measuring range

measured value too high value > 100 % check measuring range

value < xx mS/cm of

check measuring range measuring range

Possible values

Initial value Increment Lower value Upper value

Calibration conductivity measured value as per measuring range as per measuring range as per measuring range

11

Relays for Solenoid Valve Activation

Restricted Operating Menu / Description

D1C2-Leit.-013-GB

Access to all setting menus can be blocked with an access code !

Only with relay activation

SV1 cond
SV2 cond

➞

➞

Relay
setting ?

Relay adjustment
Relay1:
Relay2:

Control cond.
Solenoid valves: SV1

SV2

D1C2-Leit.-014-GB

1000 µS/cm

1500 µS/cm

Access to all setting menus can be blocked with an access code !

Limit 1

lower

Limit 2

upper

Limits
setting ?

Limits

The measured value can be adjusted to the actual conductivity value by changing the cell constants.
The following menus apply generally!

Possible values

Initial value Increment Lower value Upper value Remarks

Cellconstant cc 1.000/cm 0.0001/cm 0.0060/cm 0.1499/cm cc can be adjusted

0.001/cm 0.150/cm 1.499/cm for all mr

0.01/cm 1.50/cm 12.00/cm over the complete area

Possible values

Initial value Increment Lower value Upper value Remarks

Relay adjustment as per identity solenoid value

code limit value

off

12

Restricted Operating Menu / Description

Control

D1C2-Leit.-015-GB

1000 s

Ti =
Td =

xp =

0 s

10 %

xp =

10 %

30 %

15 %

1000 µS/cm

1500 µS/cm
1000 µS/cm

Access to all setting menus can be blocked with an access code !

Only with control

Note: The controlled variable is recalculated every second. Only

suitable for processes with time constants greater than 30 s !

Increase conductivity
Reduce conductivity

Positive values of setting variable:
Negative values of setting variable:

➞

➞

control
settings ?

control
positive cond

regulated value:
negative cond

control
current regulat.

value:

normal

Control with dead zone

For normal control

PID control

Proportional control

setpoint

setpoint 2 upper

ctrl. parameter

setpoint 1 lower

ctrl. parameter

manual dosing
regulated range

control
current regulat.

value:

30 %

with dead zone

control
current regulat.

value:

30 %

manual

Initial value Increment Lower value Upper value Remarks

Type of limit Limit 1: lower lower
transgression Limit 2: upper upper

off

2)

Limit value Limit 1: 10 µS/cm 0.01 µS/cm –1 µS/cm 21 µS/cm meas. range 20 µS/cm

Limit 2: 15 µS/cm
Limit 1: 25 µS/cm 0.01 µS/cm –2.5 µS/cm 52.5 µS/cm meas. range 50 µS/cm*
Limit 2: 37.5 µS/cm
Limit 1: 100 µS/cm 0.1 µS/cm –10 µS/cm 210 µS/cm meas. range 200 µS/cm
Limit 2: 150 mS/cm
Limit 1: 250 µS/cm 0.1 µS/cm –25 µS/cm 525 µS/cm meas. range 500 µS/cm*
Limit 2: 375 µS/cm
Limit 1: 1000 µS/cm 1 µS/cm -100 µS/cm 2100 µS/cm meas. range 2000 µS/cm
Limit 2: 1500 µS/cm
Limit 1: 2500 µS/cm 1 µS/cm -250 µS/cm 5250 µS/cm meas. range 5000 µS/cm*
Limit 2: 3750 µS/cm
Limit 1: 10 mS/cm 0.01 mS/cm -1 mS/cm 21 mS/cm meas. range 20 mS/cm
Limit 2: 15 mS/cm
Limit 1: 100 mS/cm 0.1 mS/cm -10 mS/cm 210 mS/cm meas. range 200 mS/cm
Limit 2: 150 mS/cm
Limit 1: 500 mS/cm 1 mS/cm -50 mS/cm 1050 mS/cm meas. range 1000 mS/cm*
Limit 2: 750 mS/cm

* = only with connection on standard signal

2)

= only with limit value relay

13

Restricted Operating Menu / Description

Possible values

Initial value Increment Lower value Upper value Remarks

Setpoint 10 µS/cm 0.01 µS/cm -1 µS/cm 21 µS/cm meas. range 20 µS/cm

15 µS/cm 0.01 µS/cm -2.5 µ/Sm 52.5 µ/Scm meas. range 50 µS/cm*
100 mS/cm 0.1 mS/cm -10 µS/cm 210 µS/cm meas. range 200 µS/cm
250 µS/cm 0.1 µS/cm -25 µS/cm 525 µS/cm meas. range 500 µS/cm*

1000 µS/cm 1 µS/cm -100 µ/Scm 2100 µ/Scm meas. range 2000 µ/Scm
2500 µS/cm 1 µS/cm -250 µS/cm 5250 µS/cm meas. range 5000 µS/cm*

10 mS/cm 0.01 mS/cm -1 mS/cm 21 mS/cm meas. range 20 mS/cm
100 mS/cm 0.1 mS/cm -10 mS/cm 210 mS/cm meas. range 200 mS/cm
500 mS/cm 1 mS/cm -50 mS/cm 1050 mS/cm meas. range 1000 mS/cm*

2 setpoints necessary

for control with dead zone.

setpoint 1 < setpoint 2

adjustment of measuring range

on page 18

Control parameter xp 10 % 1 % 1 % 500 % xp referred to measuring range
Control parameter Tn off 1 s 1 s 9999 s function off = 0 s
Control parameter Tv off 1 s 1 s 2500 s function off = 0 s
Manual metering 0 % 1 % –100 % +100 %

* = only with connection on standard signal

General Settings

D1C2-Leit.-016-GB

DxLxxxxxxxxxx
D1C-xx FW-xx.x

=
=

5000

general setting
information

ident-code: D1CA
software version

alarm relay access c.:

operating menu:

active

english
restricted

Access to all setting menus can be blocked with an access code !

Possible values

Initial value Increment Lower value Upper value Remarks

Alarm relay active active

not active

Access code 5000 1 1 9999

Language as per identy code

Operating menu restricted restricted

complete

14

Complete Operating Menu / Overview

All parameters of the controller can be set in the complete operating menu. The following overview shows
the settings which can be selected:

D1C2-Leit.-017-GB

Number and scope of setting menus

is dependent on the device

Access to setting menus can
be blocked with access code

mea val.:

Only with servomotor

Only with feed forward

Only with 2 standard
signal outputs

Only with 2 standard
signal outputs

Only with standard
signal output

fd. fwd.:
reg. val.:

100 µS/cm

w: 1000 µS/cm

70 %

-59 %

µS/cm

100

meas. parameter
setting ?

pumps
setting ?

relays
setting ?

limits
setting ?

servomotor
setting ?

feed forward ctrl.
setting ?

signal output 1
mA setting ?

general setting
information

Connection terminal conductive conductivity

Connection terminal standard signal

Only with control

control
setting ?

signal output 2
mA setting ?

calibration

α

Only with
servomotor

Only with
feed forward

Only with standard
signal output

100 µS/cm

w: 1000 µS/cm

70 %

-59 %

µS/cm

100

meas. range cond.
setting ?

pumps
setting ?

relays
setting ?

limits
setting ?

servomotor
setting ?

feed forward ctrl.
setting ?

signal output 1

general setting
information

Only with control

control
setting ?

measured value
setting ?

calibration
conductivity ?

change type of
connection ?

correction value
setting ?

cc :
α :

1.080/cm

2.10 %/°C

mA setting ?

signal output 2
mA setting ?

Permanent display 1 Permanent display 1

Permanent display 2
only with control
(w = setpoint)

Permanent display 2
only with control
(w = setpoint)

Only with solenoid
valve relay

Only with solenoid
valve relay

Only with pumps

Only with correction value

Only with pumps

mea val.:
fd. fwd.:
reg. val.:

15

Complete Operating Menu / Description

D1C2-Leit.-018-GB

w:

70 %
59 %

100 µS/cm

1000 µS/cm

µS/cm

100

Permanent display 1

Increase conductivity
Reduce conductivity

mea val.

Permanent display 2
only with control
(w = setpoint)

fd. fwd.:
reg. val.:

Positive values of setting variable:
Negative values of setting variable:

setting ?

meas. parameter

D1C2-Leit.-036-GB

Access to all setting menus can be blocked with an access code !

mr = meas. range
cc = cellconstant. cc :

mr :

1006 µS/cm 25.0 °C

2000 µS/cm

1.000/cm

α :

coefficient

α = temperature-

1.90%/ °C

With connection on standard signal see page 19

With connection on conductive conductivity terminals:

Measuring parameter

Possible values

Initial value Increment Lower value Upper value Remarks

Measuring range mr 0....2000 µS/cm 0....20 µS/cm setpoints and limit

0....200 µS/cm values are switched

0....2000 µS/cm to the corresponding

0....20 mS/cm startup values

0....200 mS/cm

Cellconstant cc 1000 /cm 0.0001/cm 0.0060/cm 0.1499/cm cc can be adjusted

0.001/cm 0.150/cm 1.499/cm for all mr

0.01/cm 1.50/cm 12.00/cm over the complete area

Temperature-coefficient

α 1.90 %/°C 0.01 %/°C0 %/°C 10 %/°C

The measured value can be adjusted to the actual conductivity value by changing the cell constants.
Prerequisite is a known temperature coefficient and a constant temperature.

When changing the measuring range, metering and control are stopped, the setpoints, limit values, and the
standard signal output are set to the corresponding startup values! Check these settings in all menus!

16

Complete Operating Menu / Description

Calibrating temperature coefficient α

The temperature coefficient is a determined through two-output calibration. During the calibration procedure,
metering is reduced to the set basic load. The monitoring of limiting values and error treatment are stopped.
The standard signal of the output measured value or correction value is reduced to 0/4 mA.

ATTENTION:
The conductivity values you enter must base on 25 °C. You must use the same solution when

calibrating both temperatures!

D1C2-Leit.-032-GB

Access to all setting menus can be blocked with an access code !

calibration at
probe in buffer !

temperature 1
1006 25.0 °C

calibration at
probe in buffer !

temperature 2
1006 25.0 °C

permanent display 1

calibration α ?
cc :

α :

1.000/cm

1.90 %/°C

calibration α
cc :

α :

1.080/cm

2.52 %/°C

calibration at
accept value ?

temperature 1
1006 25.0 °C

calibration at
accept value ?

temperature 2
1006 25.0 °C

calibration
temp1:

value:
temp2:

35.0 °C

25,0 °C

1006

calibration
temp1:

value:

1006

25.0 °C

Possible values

Initial value Increment Lower value Upper value Measuring range

Set sample measuring value 0.01 µS/cm - 1 µS/cm 21 µS/cm 20 µS/cm

0.1 µS/cm - 10 µS/cm 210 µS/cm 200 µS/cm
1 µS/cm - 100 µS/cm 2100 µS/cm 2000 µS/cm

0.01 mS/cm - 1 mS/cm 21 mS/cm 20 mS/cm

0.1 mS/cm - 10 mS/cm 210 mS/cm 200 mS/cm

Set temperature correction value 0.1 °C0 °C 100 °C

Error message Condition Remarks

temperature range restricted For the chosen temperature

xx – 100 °C coefficient a, a correct reading

can only be obtained for the

displayed temperature range.

temperature distance wrong ∆ temperature ≥ 10.0 °C

∆ temperature ≤ 50.0 °C

17

Complete Operating Menu / Description

D1C2-Leit.-033-GB

Access to all setting menus can be blocked with an access code !

cell connection wire resistance

resistance !

connect final

final resistance
wire resistance

change type of
connection ?

2-wire automatic

cell connection

wire resistance

4-wire

manual

10.0 Ω

3.7 Ω

3.7 Ω

D1C2-Leit.-034-GB

Access to all setting menus can be blocked with an access code !

automatic

correction value correction value

calibration temp.

33.0 °C

setting ?

Cell connection

Initial value Increment Lower value Upper value

Cell connection 2-wire 2-wire

4-wire

Determine wire resistance manual manual

automatic

Manual entry wire resistance 0.5 Ω 0.1 Ω 0 Ω 50 Ω
Final resistance 10.0 Ω 0.1 Ω 10 Ω 50 Ω

Correction value (only with connection on conductive conductivity terminals)

Possible values

Initial value Increment Lower value Upper value

Temperature compensation as per manual
category identity code automatic

off

Manual temperature 25 °C0.1 °C0 °C 100 °C
Automatic temperature correction value 0.1 °C0 °C 100 °C

18

Possible values

Initial value Increment Lower value Upper value

Calibration conductivity measured value as per measuring range as per measuring range as per measuring range

Measuring range

Complete Operating Menu / Description

Calibration conductivity with connection standard signal

D1C2-Leit.-029-GB

1500 µS/cm

calibration
conductivity ?

calibration
conductivity:

Meas. range cond.

D1C2-Leit.-019-GB

0…2000 µS/cm

Access to all setting menus can be blocked with an access code !

Meas. range
setting ?

During calibration, metering is reduced to the set basic capacity. The standard signal of the output
(measured value/correction value) is reduced to 0 mA or 4 mA.

The actually measured value will be proposed; this value is adjustable. On successful completion of
calibration, all error checks which refer to the measured value are restarted.

Error message Condition effect Remarks

measured value too low value < 2 % check measuring range

value > xx mS/cm of

check measuring range measuring range

measured value too high value > 100 % check measuring range

value < xx mS/cm of

check measuring range measuring range

When changing the measuring range, setpoints and limit values are switched over to their respective initial
values. The settings must be checked in all menus!

19

When changing the range adjustment, the adjustments in all menus have to be checked!

D1C2-Leit.-020-GB

4 mA

= 0 µS/cm

20 mA =

2000 µS/cm

Access to all setting menus can be blocked with an access code !

Standard signal input mA

Measured value
range adjustment

Measured value
range adjustment

Measured value
Checkout time
Measured value

off

Meas. value
setting ?

Complete Operating Menu / Description

Measured value

Possible values

Initial value Increment Lower value Upper value Remarks

Standard signal input 4 mA 0 mA
lower signal limit 4 mA

Allocated
special voltage 0–2000 µS/cm depending on –5 % +5 %

measuring range of final value of final value

Checkout time off 1 s 1 s 9999 s Constant measurement signal

results in message and alarm.

Function off = 0 s

Possible values

Initial value Increment Lower value Upper value Remarks

Measuring range 0....2000 µS/cm 0....1000 mS/cm* setpoints and limit values

0....200 mS/cm are switched over

0....20 mS/cm to their respective

0....5000 µS/cm* initial values

0....2000 µS/cm

0....500 µS/cm* * only with connection

0....200 µS/cm on standard signal

0....50 µS/cm*

0....20 µS/cm

20

D1C2-Leit.-023-GB

10 s

1 s

10 s

1 s

➞

➞

➞

➞

Access to all setting menus can be blocked with an access code !

Only with relay activation

Relays
setting ?

Solenoid valve 2
cond

Solenoid valve 1
cond
period
min. time

period
min. time

Relay adjustment
Relay1:
Relay2:

Control cond.
Solenoid valves: SV1

SV2

SV1 cond
SV2 cond

Complete Operating Menu / Description

D1C2-Leit.-022-GB

120
120

➞

➞

Access to all setting menus can be blocked with an access code !

Only with pumps for control

Pumps
setting ?

Dosing pump max.
pump1:
pump2:

Control
pump1 cond

pump2 cond

pulse/minute

The following menus apply generally

Pumps

Possible values

Initial value Increment Lower value Upper value Remarks

Max. stroke/minute of 120 1 1 500 off = 0 strokes/min
pumps 1 and 2

Relay for solenoid valve activation

Possible values

Initial value Increment Lower value Upper value Remarks

Relay adjustment as per solenoid valve

identity code limit

off

Period 10 s 1 s 10 s 9999 s

Min. time 1 s 1 s 1 s period/2

21

Possible values

Initial value Increment Lower value Upper value Remarks

Type of limit Limit 1: lower upper limit transgression
transgression Limit 2: upper lower when exceeding or

off 2) dropping below value

Limit 1; Limit 2 500; 750 mS/cm 1 mS/cm –50 mS/cm 1050 mS/cm meas. range 1000 ms/cm*

100; 150 mS/cm 0.1 mS/cm –10 mS/cm 210 mS/cm meas. range 200 ms/cm

10; 15 mS/cm 0.01 mS/cm –1 mS/cm 21 mS/cm meas. range 20 ms/cm

2500; 3750 µS/cm 1 µS/cm –250 µS/cm 5250 µS/cm meas. range 5000 µs/cm*
1000; 1500 µS/cm 1 µS/cm –100 µS/cm 2100 µS/cm meas. range 2000 µs/cm

250; 375 µS/cm 0.1 µS/cm –25 µS/cm 525 µS/cm meas. range 500 µs/cm*
100; 150 µS/cm 0.1 µS/cm –10 µS/cm 210 µS/cm meas. range 200 µs/cm

25; 37 µS/cm 0.01 µS/cm –2.5 µS/cm 52.5 µS/cm meas. range 50 µs/cm*
10; 15 µS/cm 0.01 µS/cm –1 µS/cm 21 µS/cm meas. range 20 µs/cm

Switch-on delay 0 s 1 s 0 s 9999 s only with complete
Limit 1; Limit 2 operating menu

Switch-off delay 0 s 1 s 0 s 9999 s only with complete
Limit 1; Limit 2 operating menu

Max. on time off 1 s 0 s/off 9999 s only with complete
Limit 1; Limit 2 operating menu

function can be switched off

Hysteresis limits 5 mS/cm* 1 mS/cm –2 mS/cm 1050 mS/cm Effective in direction

1 mS/cm 0.1 mS/cm –0.4 mS/cm 210 mS/cm of "cancelling

0.1 mS/cm 0.01 mS/cm –0.04 mS/cm 21 mS/cm limit transgression"

25 µS/cm* 1 µS/cm –10 µS/cm 5250 µS/cm

10 µS/cm 1 µS/cm –4 µS/cm 2100 µS/cm

2.5 µS/cm* 0.1 µS/cm –1 µS/cm 525 µS/cm

1.0 µS/cm 0.1 µS/cm –0.4 µS/cm 210 µS/cm

0.25 µS/cm* 0.01 µS/cm –0.1 µS/cm 52.5 µS/cm

0.10 µS/cm 0.01 µS/cm –0.04 µS/cm 21 µS/cm

Checkout time limits off 1 s 1 s/off 9999 s function can be switched off

* = only with connection on standard signal, 2) = only with limit value relay

D1C2-Leit.-024-GB

1 s
1 s

1 s
1 s

300 s

10 µS/cm

time:

0 s

time:

1000 µS/cm

1500 µS/cm

1500 µS/cm

1000 µS/cm

max.
max.

0 s

Access to all setting menus can be blocked with an access code !

Only with limit value relay

Limit 1

lower

Limit 1

Limit 1

lower

∆t on
∆t off

Limit 2

upper

Limit 2

Limit 2

upper

∆t on
∆t off

Hysteresis
limits:
Checkout time
limits:

Limits
setting ?

Complete Operating Menu / Description

Limits

22

Access to all setting menus can be blocked with an access code !

Servomotor
setting ?

Dosing:
Control range:
0 % to
operating range

100 %

Only with

Servomotor

Servomotor
Current position:

Servomotor
open ?

Servomotor
Please wait !

open

Servomotor
Please wait !

close

Servomotor
Value take over ?

opened !

Servomotor
Value take over ?

closed !

Servomotor
close ?

Servomotor
Current position:

OK

= automatic timing

D1C2-Leit.-025-GB

cond

➞

setting

Servomotor

Activation of the servomotor must be carried out with the same meticulous care as taken when calibrating
a measuring probe. The operating range is defined by the total resistance range of the feedback
potentiometer. The maximum limit of the range actually used is set by defining the control range.

ATTENTION:

To ensure correct operation, the activation time of the actuator used should not be less than
25 seconds for the control range from 0…100 %!

Complete Operating Menu / Description

Possible values

Initial value Increment Lower value Upper value Remarks

Servomotor setting setting

ok

off

Control direction cond. cond.

cond.

Control range 100 % 1 % 10 % 100 % in % of

operating range

23

D1C2-Leit.-026-GB

10 %

1000 s

Ti =
Td =

xp =

0 s

10 %

xp =

10 %

30 %

15 %

1000 µS/cm

1500 µS/cm
1000 µS/cm

additional load:
regulated range

Access to all setting menus can be blocked with an access code !

Only with control

Note: The controlled variable is recalculated every second. Only

suitable for process with time constants greater than 30 s !

Control with dead zone

For normal control

PID control

Proportional control

setpoint

setpoint 2 upper

ctrl. parameter

setpoint 1 lower

ctrl. parameter

control
settings ?

control cond.
regulated value:

manual dosing

control
current regulat.

value:

regulated range

normal

➞

➞

positive cond
negative cond

Increase conductivity
Reduce conductivity

Positive values of setting variable:
Negative values of setting variable:

Control

Possible values

Initial value Increment Lower value Upper value Remarks

Control normal normal When controlling with dead

with dead zone zone, the feed forward control

manual is not used for measured values

within the dead zone

Setpoint 500 mS/cm 1 mS/cm –50 mS/cm 1050 mS/cm meas. range 1000 mS/cm*

100 mS/cm 0.1 mS/cm –10 mS/cm 210 mS/cm meas. range 200 mS/cm

10 mS/cm 0.01 mS/cm –1 mS/cm 21 mS/cm meas. range 20 mS/cm

2500 µS/cm 1 µS/cm –250 µS/cm 5250 µS/cm meas. range 5000 µS/cm*
1000 µS/cm 1 µS/cm –100 µS/cm 2100 µS/cm meas. range 2000 µS/cm

250 µS/cm 0.1 µS/cm –25 µS/cm 525 µS/cm meas. range 500 µS/cm*
100 µS/cm 0.1 µS/cm –10 µS/cm 210 µS/cm meas. range 200 µS/cm

15 µS/cm 0.01 µS/cm –2.5 µS/cm 52.5 µS/cm meas. range 50 µS/cm*
10µS/cm 0.01 µS/cm –1 µS/cm 21 µS/cm meas. range 20 µS/cm

setpoint 2 ≥ setpoint 1

Control parameter xp 10 % 1 % 1 % 500 % xp referred to measuring range

Control parameter Ti off 1 s 1 s 9999 s function off = 0 s

Control parameter Td off 1 s 1 s 2500 s function off = 0 s

Additional load 0 % 1 % –100 % +100 %

Manual metering 0 % 1 % –100 % +100 %

*only with connection on standard signal

Complete Operating Menu / Description

24

Complete Operating Menu / Description

Feed forward control

Standard signal output 1

D1C2-Leit.-035-GB

feed forward ctrl.
setting ?

max. additive

feed forward ctrl.
regulated value

10.00 Hz

effect:

feed forward ctrl.

additiv

100 %

Hz / mA

10 Hz

feed forward ctrl.:
rated value:

feed forward
control:

Possible values

Initial value Increment Lower value Upper value Remarks

Feed forward control (Flow) as per identity code None signal processing:

10 Hz signal <0.02 Hz = no flow

500 Hz signal <0.2 Hz = no flow

with standard signal:

0…20 mA signal <0.2 mA = no flow

4–20 mA 4…20 mA signal <4.2 mA = no flow

Feed forward control 10 Hz 0.01 Hz 0.1 Hz 10 Hz Depended on signal type.
rated value 500 Hz 1 Hz 5 Hz 500 Hz Maximum limitation

20 mA 0.01 mA 0/4 mA 20 mA of range used.

Feed forward control effect multiplicative multiplicative

additive

Max. add. regulated value 100 % 1 % –500 % +500 % only with add.

feed forward control

D1C2-Leit.-027-GB

0…20 mA

2000 µS/cm

0 mA =
20 mA =

0%

0 mA =
20 mA =

100%

0 µS/cm

➞

➞

positive cond
negative cond

Access to all setting menus can be blocked with an access code !

Control with standard signal

signal output 1
mA setting ?

Only with standard signal output

signal output 1

mA

control
regulated value:

signal output 1
regulated value

Measured value

signal output 1

measured value

signal output 1

100.0 °C

0 mA =
20 mA =

correction value

0.0 °C

Only with connection on conductive conductivity

terminal

25

D1C2-Leit.-037-GB

0…20 mA

2000 µS/cm

0 mA =
20 mA =

0%

0 mA =
20 mA =

100%

0 µS/cm

➞

➞

positive cond
negative cond

Access to all setting menus can be blocked with an access code !

Control with standard signal

signal output 2

mA setting ?

Only with 2 standard signal outputs

signal output 2

mA

control
regulated value:

signal output 2
regulated value

Measured value

signal output 2
measured value

signal output 2

100.0 °C

0 mA =
20 mA =

correction value

0.0 °C

Only with connection on conductive conductivity

terminal

Standard signal output 2

Complete Operating Menu / Description

Possible values

Initial value Increment Lower value Upper value Remarks

Variable allocation as per measured value

identity code controlled variable If control applicable

correction value only with correction variable

Output range 0…20 mA 0…20 mA

4…20 mA

Range measured value 0–20 µS/cm 0.01 µS/cm –1 µS/cm 21 µS/cm meas. range 20 µS/cm

0–50 µS/cm 0.01 µS/cm –2.5 µS/cm 52.5 µS/cm meas. range 50 µS/cm*
0–200 µS/cm 0.1 µS/cm –10 µS/cm 210 µS/cm meas. range 200 µS/cm
0–500 µS/cm 0.1 µS/cm –25 µS/cm 525 µS/cm meas. range 500 µS/cm*

0–2000 µS/cm 1 µS/cm –100 µS/cm 2100 µS/cm meas. range 2000 µS/cm
0–5000 µS/cm 1 µS/cm –250 µS/cm 5250 µS/cm meas. ranges 5000 µS/cm*

0–20 mS/cm 0.01 mS/cm –1 mS/cm 21 mS/cm meas. range 20 mS/cm

0–200 mS/cm 0.1 mS/cm –10 mS/cm 210 mS/cm meas. range 200 mS/cm

0–1000 mS/cm 1 mS/cm –50 mS/cm 1050 mS/cm meas. range 1000 mS/cm*

Range controlled variable 0 %…+100 % 1 % –100 % +100 % minimum range 1 %

Range correction value 0....100 °C0.1 °C0.0 °C 100 °C minimum range 1 °C

*only with connection on standard signal

26

General setting

Complete Operating Menu / Description

D1C2-Leit.-028-GB

DxLxxxxxxxxxx
D1C-xx FW-xx.x

5000

= alarm

=
=

off

Access to all setting menus can be blocked with an access code !

general setting
information

ident-code: D1CA
software version

alarm relay control input

= active

access c.:
operating menu:

active

closed

english
complete

pause

Possible values

Initial value Increment Lower value Upper value Remarks

Alarm relay active active

not active

Pause Pause Pause *If pause/hold is active the

Pause/Hold* last valid setting value

(PI-part) is frozen

Control input pause closed closed

open

Alarm pause off off Alarm relay can be

on triggered by pause contact

Access code 5000 1 1 9999

Language

as per identity code

Operating menu complete restricted

complete

* at software version 4.6

Hold function (all measurement variables)

When the pause/hold setting is selected, on activation, the controlled variable is frozen to the last value
(PI-part is retained). This setting can be carried out in the complete operating menu – general settings
information.

27

9 EC Declaration of Conformity

28

©1995 ProMinent Dosiertechnik GmbH · D-69123 Heidelberg

Operating Instructions DULCOMETER® D1C, Part 2/L, Version 1.0, Issue 08/01

Subject to modifications · Printed in the F.R.Germany

ProMinent Dosiertechnik GmbH · Im Schuhmachergewann 5-11 · 69123 Heidelberg · Germany

Postfach 101760 · 69007 Heidelberg · Germany

[e-mail] · www.prominent.de

10 Troubleshooting

Fault Fault text Symbol Effect Alarm with Remarks Remedy

On metering On control

acknowledgement

Measured value mS-meas. range ↑↓ Basic load Stop Yes meas. value out Check range adjustment

Signal exceeds/drops below Check ms-input Basic load Stop Yes of meas. range. Check probe, transducer

value* Signal <3.0 ±0.2 mA and cable connection

or >23 ±0.2 mA

Checkout time meas. value exceeded* Check ms-probe Basic load Stop Yes Function defectable Check function of probe

Correction variable

Signal exceeds/drops below Check te-input Basic load Stop Yes Signal <3.0 ±0.2 mA Check probe, transducer

value* or >23 ±0.2 mA and cable connection

upper limit temperature exceeded te-limit ↑ Basic load Stop Yes α ≥ 4 %/°C

Feed forward control

Signal exceeds/drops below Check feed forward Yes Signal <3.0 ±0.2 mA Check probe, transducer

value* input or >23 ±0.2 mA and cable connection

Value last valid

is used

Limit transgression mS-limit 1 ↑↓ Yes Function defectable Define cause,

after checkout time limits mS-limit 2 ↑↓ reset values if necessary

Servomotor

Position not reached Servomotor defective Yes Servomotor closes Check servomotor

Electronics error System error Stop Stop Yes Electronic data defective Call in service

Operation Note text Symbol Effect Alarm with Remarks Remedy

On metering On control

acknowledgement

Pause contact Pause Stop Stop No No further –

fault check

Stop button Stop Stop Stop No Relay drops out –

Calibration*

Calibration mS-calibration Basic load Stop – – Repeat calibration

with error insufficient Check probe/buffer

During servomotor setting

Position feed back wrong Direction check Without correct Check connection of relay,

adjustment the last potentiometer

Upper position <40 % max. value Final value small valid values are still used Adjust the operation region

Lower position >30 % range Final value big of the servomotor correctly

*only with connection on standard signal