GESTRA URB 1 Original Installation Instructions

1

EN

English

Operating Terminal & Display Unit

URB 1

Original Installation Instructions

81037507

2

Contents

Usage for the intended purpose ..............................................................................................................4

Safety note .............................................................................................................................................4

Attention ................................................................................................................................................. 4

LV (Low Voltage) Directive ....................................................................................................................... 4

EMC (Electromagnetic Compatibility) .......................................................................................................4

ATEX (Atmosphère Explosible) .................................................................................................................4

Important Notes

Page

Explanatory Notes

Scope of supply ...................................................................................................................................... 5

Description ............................................................................................................................................. 5

Function ................................................................................................................................................ 6

System components ...............................................................................................................................6

Design .................................................................................................................................................... 6

URB 1 ................................................................................................................................................... 13

Tools ..................................................................................................................................................... 13

Example of Installation .......................................................................................................................... 13

Key ....................................................................................................................................................... 13

Installation

Electrical Connection

Control cable ........................................................................................................................................14

Note .....................................................................................................................................................15

CAN bus voltage supply ........................................................................................................................15

Attention .............................................................................................................................................. 15

Wiring diagram ..................................................................................................................................... 16

Key ....................................................................................................................................................... 16

URB 1 ..................................................................................................................................................... 7

Name plate/marking ............................................................................................................................... 8

Dimensions .............................................................................................................................................9

Technical Data

URB 1 ................................................................................................................................................... 10

Key ....................................................................................................................................................... 12

Design

URB 1 ................................................................................................................................................... 11

Key ....................................................................................................................................................... 12

Functional Elements

3

Applying mains voltage ......................................................................................................................... 21

Adjusting display contrast ............................................................................................................... 21, 22

Changing factory set node ID of URB 1, adjusting / changing node ID of URB 1 ...............................23–25

Possibilities to display bus devices ........................................................................................................25

Setting / changing node IDs of bus-based equipment .....................................................................26–29

Visual display / parameterisation of bus-based equipment .............................................................. 30–35

0 % to 100 % calibration for capacitance level monitoring ...............................................................36–38

Calibrating the feedback potentiometer of an external control valve ............................................... 39–42

Establishing switchpoints and proportional coefficient Xp ................................................................43–46

Adjusting sensitivity range .............................................................................................................. 47, 48

Setting relay energizing times ......................................................................................................... 49–51

Adjusting conductivity controller .....................................................................................................52–63

Adjusting linear (LIN) temperature compensation ............................................................................ 64–66

Adjusting standard curve (NORM) temperature compensation ......................................................... 67–71

Enabling automatic (AUTO) temperature compensation ................................................................... 72, 73

Disabling temperature compensation ............................................................................................. 74, 75

Contents – continued –

Commissioning Procedure

Page

Manual operation of an external control valve ....................................................................................... 76

Stand-by operation with the steam boiler disconnected ........................................................................ 77

Operation

Bus cable..............................................................................................................................................18

Node ID ................................................................................................................................................19

Factory setting ...................................................................................................................................... 20

Establishing / changing node ID ............................................................................................................ 20

Attention ............................................................................................................................................... 20

Code switch settings .............................................................................................................................20

Basic Settings

Systematic malfunction analysis ........................................................................................................... 78

Fault finding list for troubleshooting ................................................................................................ 79, 80

System Malfunctions

Note on the Declaration of Conformity / Declaration by the Manufacturer ....................................... 81

Annex

Electrical Connection – continued –

CAN bus wiring diagram .......................................................................................................................17

Attention ............................................................................................................................................... 17

Note .....................................................................................................................................................18

Tools ..................................................................................................................................................... 18

4

Important Notes

Usage for the intended purpose

Use operating terminal & display unit URB 1 only in conjunction with GESTRA Spector Bus systems
(CANopen).

Safety note

The equipment must only be installed and commissioned by qualified and competent staff. Retrofit­ting and maintenance work must only be performed by qualified staff who – through adequate training
– have achieved a recognised level of competence.

The equipment meets the requirements of the Low Voltage Directive 2014/35/EU.

Attention

The name plate specifies the technical features of the equipment. Note that any piece of
equipment without its specific name plate must neither be commissioned nor operated.

LV (Low Voltage) Directive

According to the European Directive 2014/34/EU the equipment must not be used in potentially explo­sive areas.

ATEX (Atmosphère Explosible)

The equipment meets the requirements of the EMC Directive 2014/30/EU.

EMC (Electromagnetic Compatibility)

5

Scope of supply

URB 1

1 Operating terminal & display unit URB 1 (in plastic case)
2 Fixing screws for panel mounting
1 Installation & operating manual

Description

The URB 1 is a user-friendly operating terminal and display unit for GESTRA CAN bus systems.
The equipment makes retrieving and processing all standard functions of associated system
components very easy. The URB 1 uses the CANopen protocol. In addition, the URB 1 simplifies the
parameterisation procedure: The switchpoints, proportional band and response sensitivity can be
adjusted by means of the keypad regardless of the actual level. The energizing and de-energizing times
of the relays can be set individually for their respective switchpoints.

The following tables list the GESTRA systems that can be viewed by the URB 1.

Standard display

Level Conductivity

NRS 140 NRS 141 NRS 142

NRS 240 NRR 240

LRR 140

Actual value (bar chart)

  

Actual value (numerical)

  

Switchpoint (symbol)

   

High level alarm (electrode HW)

   

Low level alarm (electrode LW)

   

Manual/automatic operation

  

Stand-by mode



Unit [µS/cm], [ppm]



Low level limit



High level limit



Alarm (warning triangle)

 

Further display information

Level Conductivity

NRS 140 NRS 141 NRS 142

NRS 240 NRR 240

LRR 140

Actual value (continuous)

  

Switchpoints

   

Setpoint

 

Deviation

 

Valve position

 

Intermittent blowdown duration



Intermittent blowdown interval



Purging pulse 24 h



Current CAN bus addresses

     

Explanatory Notes

6

Explanantory Notes – continued –

System components

NRS 140

Level switch NRS 1-40
NRS 141

Level switch NRS 1-41
NRS 142

Level switch NRS 1-42
NRS 240

Level switch NRS 2-40
NRR 240

Level switch NRR 2-40
LRR 140

Conductivity switch LRR 1-40

Design

URB 1

Enclosure of insulating material with terminals for installation in control cabinets.
The terminals are accessible from the back.
External dimensions: 95 x 95 x 63

Function

The URB 1 communicates with other GESTRA system components via CAN bus, using the CANopen
protocol to DIN ISO 11898.

The URB 1 can also be used to operate and display further system components during operation.

n Capacitance level switch NRS 2-40 CANopen
n Level controller NRR 2-40 CANopen
n Conductivity level switch NRS 1-42 CANopen
n Low level limiter to TRD 604/EN NRS 1-40 CANopen

n

High water limiter to TRD 604/EN NRS 1-41 CANopen

n

Conductivity controller and limiter to TRD 604/EN LRR 1-40 CANopen

7

URB 1

Technical Data

Type approval

TÜV · XX-399 (level)
TÜV · WÜL · XX-007 (conductivity)

Software
Software version 311099.16

Input
Power supply 18V to 36V DC
Interface for CAN bus using CANopen protocol to DIN ISO 11898

Output
Interface for CAN bus using CANopen protocol to DIN ISO 11898

Indicators and adjustors
1 illuminated graphic display, resolution 128 x 64 pixels
5 pushbuttons
1 three-pole code switch for baud rate setting

Supply voltage
18 V to 36 V DC

Protection
Front panel: IP 54 to DIN EN 60529
Back: IP 00 to DIN EN 60529

Admissible ambient temperature
0 – 55 °C

Body material
Front panel: Aluminium with polyester membrane
Casing: Noryl GFN 2 SE 1, glass-fibre reinforced

Weight
Approx. 0.3 kg

8

Technical Data – continued –

Name plate/marking

Fig. 1

IN/OUT: CAN-Bus+18V-36VDC

T

amb

= 55°C (131°F)

IP 54 (IP00)

Mat.-Nr.: 391769

TÜV.WR.XX-399
TÜV.WÜL.XX-007

S

CAN-

BUS

24V

DC

Betriebsanleitung
beachten!

See installation
instructions!

Voir instructions de
montage!

Bediengerät

Control unit

Appareil de contrôle

URB 1- V2

Münchener Str.77
D-28215 Bremen
Germany

GESTRA AG

ON

OFF

Baudrate

321

1

2

3

4

5

_

C

L

S

C

H

+

{

}

311099.XX

XX.XX.20XX

URB1

9

045%

3450 S/cm

S/cm

W

W

8

Technical Data – continued –

Dimensions

Fig. 2

63

95

95

10

Design

URB 1

Fig. 3

9

8

7

8

11

Functional Elements

URB 1

Fig. 4

1

6

5432

12

Design/Functional Elements – continued –

Key

1 Program button for switching between operating mode and parameterisation mode

2 Increase button

3 Decrease button

4 Enter button

5 Manual / automatic button

6 Illuminated LCD display, resolution 128 x 64 Pixel

7 Code switch for baud rate setting

8 Fixing screws for panel mounting

9 5-pole connector

13

045%

3450 S/cm

S/cm

W

W

Tools

n Screwdriver (5.5/100)

Installation

URB 1

Panel mounting

1. Provide panel cut-out, dimensions: 92

+0.8

x 92

+0.8

.

2. Install URB 1 using the fixing clips supplied with the equipment.

Fig. 5

Example of Installation

8 Fixing screw for panel mounting

Key

8

118

73

14

Electrical Connection

Control cable

NRS, NRR, LRR, TRS, URB 1

To wire the equipment, multi-core twisted-pair control cable must be used for the bus line,
e. g. UNITRONIC

®

BUS CAN 2 x 2 x ... mm2 or RE-2YCYV-fl 2 x 2 x ... mm2.

The baud rate (data transfer rate) dictates the cable length and size between the bus nodes. The total
power consumption must also be taken into consideration when selecting the conductor size. The total
power consumption is obtained from the number of bus nodes.

If the cable length between the steam boiler and the control cabinet exceeds 15 m, we recommend that
you fit a branching box that is resistant to electromagnetic interference (stock code 1501214) and use a
control cable with a larger conductor size for the distance to the control cabinet.

Set baud rate via code switch

7. Make sure that all bus nodes feature the same settings.

S 1 S 2 S 3 Baud rate Cable length

Number of pairs

and conductor size [mm

2

]

OFF ON OFF 250 kBit/s 125 m

2 x 2 x 0.32

Factory setting

ON ON OFF 125 kBit/s 250 m 2 x 2 x 0.5

OFF OFF ON 100 kBit/s 335 m 2 x 2 x 0.75

ON OFF ON 50 kBit/s 500 m

on request, depending on

bus configuration

OFF ON ON 20 kBit/s 1,000 m

ON ON ON 10 kBit/s 1,000 m

UNITRONIC® is a registered trademark of LAPP Kabelwerke GmbH, Stuttgart.

15

Electrical Connection – continued –

Note

n The specified max. baud rates and cable lengths are based on empirical values

obtained by GESTRA. In certain cases it may be necessary to reduce the baud rate in
order to ensure operational safety.

n

The type and design of the data cable has a strong influence on the electromagnetic

compatibility (EMC) of the equipment. Take special care when connecting the
equipment.

n

If you do not use the control cable assemblies connect the connectors and jacks for

the control cables as indicated in the assignment diagram for sensor plug-in unions.

CAN bus voltage supply

To ensure the troublefree operation of the CAN bus system make sure that the voltage supply for all bus
devices is sufficient.

Please use the following table to check the voltage supply of your bus system.

Control units with
voltage supply

Qty.

x

Power output per item = Sum

x

6 W = W

Please enter data.

Sum 1 = W

Sensor, transmitter, control
units, operating & display unit
URB 1

Qty.

x

Power consumption per item = Sum

x

3 W = W

Operating & Display Unit
URB 2

x

5 W =

W

Please enter data.

Sum 2 =

W

If sum 2 exceeds sum 1 supply the CAN bus with 24 V DC coming from a separate and stabilized safety
power supply unit (e. g. SITOP Smart 24 V 2.5 A).

The power supply unit must be electrically isolated from dangerous contact voltages and must meet at
least the requirements on double or reinforced isolation acc. to DIN EN 50178 or DIN 61010-1 or
DIN EN 60730-1 or DIN EN 60950 (safe isolation).

The power supply unit must be provided with an overcurrent protective device in accordance with
EN 61010-1.

Attention

If a safety power supply unit (e. g. SITOP smart, 24 V, 2.5 A) is used for the voltage supply
of the CAN bus do not tap the supply voltage from the terminals 1 and 5 of the GESTRA
control devices.

SITOP smart is a registered trademark of Siemens AG, Munich

16

Wiring diagram

Fig. 6

Electrical Connection – continued –

0

a

a

0

Terminating resistor 120 Ω, RES 1 or RES 2

a CAN bus line, twisted pair control cable

Key

17

Electrical Connection – continued –

CAN bus wiring diagram

Fig. 7

CEP

NRS, NRR,

LRR, TRS

NRG, LRG NRG, LRG

RES 1

Attention

n Wire equipment in series. Star-type wiring is not permitted!
n Link screens of control cables such that electrical continuity is ensured and connect

them once to the central earthing point (CEP). If equipotential bonding currents are
to be expected, for instance in outdoor installations, make sure that the screen is
separated from the central earthing point (CEP).

n To protect the switching contacts fuse circuit with T 2.5A or according to TRD

regulations (1.0 A for 72 h operation).

n If two or more system components are connected in a CAN bus system, provide the

first and the last device with a terminating resistor of 120 Ω.

n Note that in a CAN bus network only one water-level limiting system may be used.
n Do not interrupt the CAN bus network during operation with one or more system

components!
If the CAN bus network is interrupted the safety circuit will be opened.
Before taking the CAN bus line from the terminal strip, make sure that all connected

system components are out of service.

18

Electrical Connection – continued –

Tools

n Screwdriver for slotted screws, size 2.5, completely insulated according to VDE 0680

Note

n Link screen only to terminal S, ensure electrical continuity and connect it once to the

central earthing point (CEP).

n

The loop resistance must be below 10 Ω.

n

The rated voltage is indicated on the name plate.

n

When switching off inductive loads, voltage spikes are produced that may impair the
operation of control and measuring systems. Provide connected contactors with RC
combinations, e.g. 0.1 µF/100 Ω.

n Even in correctly wired systems high frequency interference caused by the installation

can lead to system outages and malfunction alarms. For more information please refer
to the fault-finding list in the section Malfunctions Troubleshooting.

Bus cable

All devices (level, conductivity) are interconnected via CAN bus. The CANopen protocol is used for the
data exchange between the equipment groups. All devices have an electronic address – the node ID.
The four-core bus cable serves as power supply and data highway for high-speed data exchange.

The CAN address (node ID) can be set between 1 – 123.
The URB 1 has already been configured at our works for operation with other GESTRA components and

can be used straight away without having to set the node ID.

If several identical systems are to communicate in a CAN bus network, set a different node ID for
each system (e. g. limiter, controller, etc).

If the length of the CAN bus cable exceeds 125 m change the settings of the code switch

7.

For more information on switch positions see Basic Settings Switch positions.

Basic Settings

19

Node ID

Basic Settings – continued –

Water level limiter

NRS 1-40 NRG 16-40 (1) NRG 16-40 (2) Reserved Reserved

X X + 1 X + 2 X + 3 X + 4
1 2 3 Factory setting

Safety system for steam boilers with superheater

NRS 1-40.1 NRG 16-40 (1) NRG 16-40 (2) TRV 5-40 Limiter 4

X X + 1 X + 2 X + 3 X + 4
1 2 3 4 Factory setting

Safety system (e. g. hotwater generating units)

NRS 1-40.1 NRG 16-40 (1) NRG 16-40 (2) Limiter 3 Limiter 4

X X + 1 X + 2 X + 3 X + 4
1 2 Factory setting

Safety system (e. g. hotwater generating units)

NRS 1-40.2 *) TRV 5-40 (1)*) TRV 5-40 (2) *) Limiter 3 Limiter 4

X X + 1 X + 2 X + 3 X + 4
6 7 8 9 10 Factory setting

TRS 5-40 (1) *) TRS 5-40 (2) *)

X + 1 + 90 X + 2 + 90

97 98

High level alarm

NRS 1-41 NRG 16-41 Reserved Reserved Reserved

X X + 1 X + 2 X + 3 X + 4
6 7 8 9 10 Factory setting

Further components

SRL 40

X = (sensor: level limiter // hi alarm) + 2

Factory setting

ORT 6

98 Factory setting

Onoff level control

Reserved NRS 1-42 NRG 16-42

X – 1 X X + 1

19 20 21 Factory setting

Modulating level control

URZ 40 *) NRS 2-40 NRR 2-40 NRG 26-40 Reserved

X – 2 X – 1 X X + 1 X + 2

38 39 40 41 42 Factory setting

Automatic continous blowdown control

EF 1-40 *) Reserved LRR 1-40 LRG 1-4... Reserved

X – 2 X – 1 X X + 1 X + 2

48 49 50 51 52 Factory setting

Control unit

URB 1, URB 2

60 Factory setting

*) Only possible in conjunction with the user-friendly operating unit URB 2!

20

Basic Settings – continued –

Factory setting

The display unit features the following factory set default values:

n Baud rate: 250 kb/s
n Node ID: 060 Note: This node ID should only be changed if necessary, max. node ID: 123.

Establishing / changing node ID

If several identical systems are to communicate in a CAN bus network, allocate a different node ID for
each system (e. g. limiter, controller, etc). In most cases it is sufficient to commission the equipment
with the default factory settings.

The code switch

7 is on the back of the equipment.

Attention

n We recommend that you commission the CAN bus devices with the default factory

setting.

n Do not use a node ID for more than one piece of equipment in the CAN bus system.

Fig. 8 (Factory setting 250 kBit/s)

Code switch settings

S1 S2 S3 Baud rate Cable length

OFF ON OFF 250 kBit/s 125 m

ON ON OFF 125 kBit/s 250 m

OFF ON ON 100 kBit/s 335 m

ON ON ON 50 kBit/s 500 m

OFF ON ON 20 kBit/s 1,000 m

ON ON ON 10 kBit/s 1,000 m

21

Commissioning Procedure

Adjusting display contrast

To ensure optimum readability we recommend
that you adjust the contrast of the LCD display
to the ambient light.

P

URB1ID: 060

P

+

Press button for 3 sec.
The address parameterisation mode of the

URB 1 is shown.

3 sec.

Applying mains voltage

After applying the mains voltage the following
information appears on the equipment.

n Equipment version
n Software version
n Operating status:

Operational = ready for operation
Not Operational = malfunction / new start-up

If the system does not detect a malfunction after the
mains voltage has been switched on, the start-up
window will appear after several seconds.

URB 1 V2.0

SW_Ver: 311099.XX

OPERATIONAL

22

Commissioning – continued –

E

0%

0,0S/cm

S/cm

W

W

Press button briefly.
The start window is shown now.

Adjusting display contrast – continued –

Press button several times to increase the
contrast.

URB1ID: 060

P

+

briefly

several times briefly

Press button several times to decrease the
contrast.

URB1ID: 060

P

+

several times briefly

23

Commissioning – continued –

Changing factory set node ID of URB 1, adjusting / changing node ID of URB 1

The default factory set node ID of the URB 1
is “060”. Node IDs below “060” are
reserved for other GESTRA bus equipment.

If additional operating terminals type URB 1
are used in a CAN bus system, you have to
set their node IDs to values above “060”.

Make sure that you do not use the same
node IDs for different bus devices.

Press button briefly to activate the line
selection mode.

P

URB1ID: 060

P

+

P

URB1ID: 060

P

+

Press button for 3 sec.
The address parameterisation mode of the

URB 1 is shown.

briefly

3 sec.

24

Commissioning – continued –

Changing factory set node ID of URB 1, adjusting / changing node ID of URB 1  continued 

Press button twice briefly to move the cursor
two steps further.

Press button

once briefly to select the

digit “1”.
In our example the node ID was set to “061”.

Press button

briefly to activate the line

editing mode.
Use button

or to increase or decrease the

first digit.

P

URB1ID: 060

P

+

E

URB1ID: 060

P

+

URB1ID: 061

P

+

flashing

flashing

flashing

briefly

twice briefly

once briefly

25

Commissioning – continued –

Changing factory set node ID of URB 1, adjusting / changing node ID of URB 1 – continued –

Possibilities to display bus devices

The URB 1 can display only one level monitoring device, one low-level alarm, one high-level alarm
and only one conductivity monitoring device per vessel (e.g. steam boiler or feedwater deaerator).

If the monitoring systems of more than one vessel are to be displayed, provide one URB 1 per vessel.

Press button

briefly.
The system will re-start.
The start window appears after approx.

10 seconds.
In our example the node ID was set to “061”.

briefly

26

Commissioning – continued –

Setting / changing node IDs of busbased equipment

The default node ID setting of all bus devices that
can be displayed is “OFF”. This setting acts as a wild
card for all bus devices which are not displayed with
the URB 1.

For each bus device that shall be displayed by the
URB 1 a node ID has to be established manually.

We recommend to accept the factory set node IDs of
GESTRA bus devices.
For the relevant node ID settings please refer to the
corresponding installation manual of the device in
question.

P

NRS 1-40 ID: OFF
NRS 1-41 ID: OFF
NRS 1-42 ID: OFF
NRS 2-40 ID: OFF
NRR 2-40 ID: OFF
LRR 1-40 ID: OFF

P

1:030 000 030 000

2:000 000 010 000

3:000 000 010 000

4:030 030 030 000

21

NRR 2-40 NRS 2-40

1

2

P

Press button briefly to view the address list and
activate the parameterisation mode.

Press button

briefly to activate the line

selection mode.

briefly

briefly

27

Commissioning – continued –

Setting / changing node IDs of busbased equipment – continued –

Press button once briefly to select the
digit “0”.

Press button

briefly to move the cursor one
step further.

Press button

briefly to activate the line
editing mode.

Use button

or to increase or decrease the

first digit.

Press button

twice briefly to select the
digit “0”.

P

NRS 1-40 ID: OFF

NRS 1-41 ID: OFF
NRS 1-42 ID: OFF
NRS 2-40 ID: OFF
NRR 2-40 ID: OFF
LRR 1-40 ID: OFF

P

NRS 1-40 ID: 028

NRS 1-41 ID: OFF
NRS 1-42 ID: OFF
NRS 2-40 ID: OFF
NRR 2-40 ID: OFF
LRR 1-40 ID: OFF

P

E

NRS 1-40 ID: 028

NRS 1-41 ID: OFF
NRS 1-42 ID: OFF
NRS 2-40 ID: OFF
NRR 2-40 ID: OFF
LRR 1-40 ID: OFF

P

NRS 1-40 ID: 008

NRS 1-41 ID: OFF
NRS 1-42 ID: OFF
NRS 2-40 ID: OFF
NRR 2-40 ID: OFF
LRR 1-40 ID: OFF

P

flashing

flashing

flashing

flashing

briefly

briefly

once briefly

twice briefly

28

Commissioning – continued –

Setting / changing node IDs of busbased equipment – continued –

Press button 7 times briefly to select the
digit “1”.

Press button

briefly to activate the line

selection mode.

Press button

briefly to move the cursor one

step further.

Press button

once briefly to move to the

next line.
The node ID of the NRS 1-41 can now be

adjusted.

E

NRS 1-40 ID: 008

NRS 1-41 ID: OFF
NRS 1-42 ID: OFF
NRS 2-40 ID: OFF
NRR 2-40 ID: OFF
LRR 1-40 ID: OFF

P

NRS 1-40 ID: 001

NRS 1-41 ID: OFF
NRS 1-42 ID: OFF
NRS 2-40 ID: OFF
NRR 2-40 ID: OFF
LRR 1-40 ID: OFF

P

E

NRS 1-40 ID: 001

NRS 1-41 ID: OFF
NRS 1-42 ID: OFF
NRS 2-40 ID: OFF
NRR 2-40 ID: OFF
LRR 1-40 ID: OFF

P

NRS 1-40 ID: 001

NRS 1-41 ID: OFF

NRS 1-42 ID: OFF
NRS 2-40 ID: OFF
NRR 2-40 ID: OFF
LRR 1-40 ID: OFF

P

flashing

flashing

briefly

briefly

once briefly

7 times briefly

29

Commissioning – continued –

Setting / changing node IDs of busbased equipment – continued –

Press button briefly to return to the start
window.

Press button

briefly to activate the

parameterisation mode.
In our example the node IDs of all bus devices

have already been adjusted.
If the NRS 1-42 is to be displayed, set the node

IDs of the NRS 2-40 and NRR 2-40 to “OFF”.

E

NRS 1-40 ID: 001
NRS 1-41 ID: 006
NRS 1-42 ID: OFF
NRS 2-40 ID: 039
NRR 2-40 ID: 040
LRR 1-40 ID: 050

P

E

045%

3450S/cm

S/cm

W

W

briefly

briefly

30

Commissioning – continued –

Press button briefly to enter the display window
of the level switch NRS 2-40.

1 Actual level (graphical representation)
2 Actual level (percentage)
3 Control unit 2 highlighted
4 Switchpoints for control unit 2
5 Low-level alarm (flashes in the event of a LW alarm)
6 High-level alarm (flashes in the event of a HW alarm)

LW = low water (limiter NRS 1-40)
HW = high water (limiter NRS 1-41)

Visual display / parameterisation of busbased equipment

Press button briefly to enter the display
window of the level controller NRR 2-40.

1 Actual level (graphical representation)
2 Actual level (percentage)
3 Setpoint deviation
4 Proportional band Xp
5 Switchpoints NRR 2-40
6 Valve position

The split-screen start window shows which
GESTRA bus devices can be indicated:

n High level limiter NRS 1-41
n Low level limiter NRS 1-40
n Level switch NRS 2-40
n Level controller NRR 2-40
n Conductivity controller LRR 1-40

MAX

MIN

045%

1: 080
2: 060
3: 040
4: 020

2

[%]

NRR 2-40 NRS 2-40

1

2

NRR 2-40 NRS 2-40

1

2

MAX

MIN

W

45%

+

-

-05%

XP

20%

70%

1: 080
4: 020

1

[%]

1

2

3

4

5

6

2

3

4

5

6

1

briefly

briefly

31

E

045%

3450S/cm

S/cm

W

W

1

2

Commissioning – continued –

Visual display / parameterisation of busbased equipment – continued –

Press button briefly to enter the
parameterisation mode for the following
settings:

n Relay energising times
n Relay de-energising times

Press button

briefly to enter the error
messages window.

For more information see section Malfunctions,
Troubleshooting, Fault Finding List on pages
79 and 80.

Press button

briefly to enter the
parameterisation mode for the following
settings:

n 0% - 100 % calibration NRG 26-40
n Switchpoints NRR 2-40
n Proportional band NRR 2-40
n Switchpoints NRS 2-40

0% :
100%: 100

1:080 080

2:060 060

3:040 040

4:020 020

2

1

[%]

[%]

*

NRR 2-40 NRS 2-40

1

2

P

Press button briefly to return to the start
window.

1 Actual conductivity value
2 Actual conductivity (graphical representation)

briefly

briefly

briefly

briefly

32

Commissioning – continued –

Visual display / parameterisation of busbased equipment – continued –

Press button briefly to enter the
parameterisation mode for the following settings:

n µS/cm or ppm
n Measuring range
n Max. conductivity value
n Setpoint
n Min. conductivity value

Press button

briefly to enter the parameterisation

mode for the following settings:

n Proportional range Xp
n Controller hysteresis
n 24-h purging pulse for continuous blowdown valve
n Operating position of continuous blowdown valve
n Relay contact 4:

MIN limit / automatic intermittent boiler blowdown

Press button

briefly to enter the display window of

the conductivity controller LRR 1-40.

1 Actual conductivity value
2 Conductivity setpoint
3 Max. conductivity value
4 24-h purging pulse for continuous blowdown valve
5 Operating position of the continuous blowdown valve
6 Valve position of the continuous blowdown valve

Press button

briefly to enter the parameterisation

mode for the following settings:

n Linear temperature compensation LIN
n Automatic temperature compensation AUTO
n Standard curve temperature compensation NORM
n Temperature compensation disabled OFF

MAX:

w:

03000 S

S/cm

06000 S
24h

8%

26%

3450

MIN:

MAX:
w:

06000,0
03000,0
01000,0

0,5-12000

Range:

ppm

P

S/cm

S/cm

S/cm

S/cm

S/cm

08 %

10 %

000 %

Hyst [w]:

:

Xp:

24 h:

P

J/N

Auto

4: MIN

OFF

Tk [Auto]
Temp.
C.

: 019,7 °C
: 0,210

NORM

:/StartStop

AUTO

Tk:

Tk [Lin ]

: 2,1 %/°C

LIN

P

1

2
3
4

5

6

briefly

briefly

briefly

briefly

33

Commissioning – continued –

Visual display / parameterisation of busbased equipment – continued –

Press button briefly to return to the start
window.

Press button

briefly to enter the error
messages window.

For more information see section Malfunctions,
Troubleshooting, Fault Finding List on pages
79 and 80.

briefly

briefly

E

045%

3450S/cm

S/cm

W

W

34

Press button

briefly to enter the parameterisation

mode for the following settings:

n Minimum conductivity of the liquid 0.5 µS/cm
n Minimum conductivity of the liquid 10 µS/cm

Visual display / parameterisation of busbased equipment – continued –

Press button briefly to enter the display win­dow of the level controller NRS 1-42.

1 High level switchpoint (MAX)
2 Switchpoints
3 Low level switchpoint (MIN)

The split-screen start window shows which
GESTRA bus devices can be indicated:

n Level switch NRS 1-42

This window appears if – as shown in our
example – only the NRS 1-42 is displayed.

NRS 1-42

1

P

0,5: S/cm10

MAX

MIN

NRS 1-42

1

Commissioning – continued –

1

2

3

2

briefly

briefly

35

Visual display / parameterisation of busbased equipment – continued –

Press button briefly to enter the error
messages window.

For more information see section Malfunctions,
Troubleshooting, Fault Finding List on pages
79 and 80.

Press button

briefly to return to the start
window.

In this example only the bus device NRS 1-42 is
displayed.

If the node IDs of the bus devices NRS 2-40
and NRR 2-40 have been established such that
the equipment can be displayed on the URB 1,
the indication of these devices will take priority
over the NRS 1-42 and the display window of
the NRS 1-42 will be blanked.

Press button

briefly to enter the para­meterisation mode for the following settings:

n Relay energising times
n Relay de-energising times

1:030 031

2:010 011

3:020 021

4:040 041

1

NRS 1-42

1

P

Commissioning – continued –

briefly

briefly

briefly

0,0 S/cm

W

040%

E

36

Commissioning – continued –

0 % to 100 % calibration for capacitance level monitoring

Press button 3 times briefly to enter the
window for calibrating the 0 % and 100 % settings.

Press button 2 times briefly to activate the
line editing mode.

Lower liquid level in the vessel to 0 %.

The split-screen start window shows which GESTRA
bus devices can be indicated:

n High level limiter NRS 1-41
n Low level limiter NRS 1-40
n Level switch NRS 2-40
n Level controller NRR 2-40
n Conductivity controller LRR 1-40

Before commissioning the installation establish the
measuring range of the capacitance level electrode
NRG 26-40 by calibrating the 0 % and 100%
settings.

0% :
100%: 100

1:080 080

2:060 060

3:040 040

4:020 020

2

1

[%]

[%]

*

NRR 2-40 NRS 2-40

1

2

P

P

1:080 080

2:060 060

3:040 040

4:020 020

2

1

[%]

[%]

*

0% :

100%: 100

P

NRR 2-40 NRS 2-40

1

2

flashing

3 times briefly

twice briefly

37

Commissioning – continued –

0 % to 100 % calibration for capacitance level monitoring – continued –

Press button once briefly.

Press button

once briefly to activate the line
editing mode.

Raise liquid level in the vessel to 100 %.
If, for practial reasons, it is not possible to raise the

water level to 100 % please proceed as follows!

Press button

briefly to save the 0 % level set­ting.

E

1:080 080

2:060 060

3:040 040

4:020 020

2

1

[%]

[%]

*

0% :

100%: 100

P

NRR 2-40 NRS 2-40

1

2

1:080 080

2:060 060

3:040 040

4:020 020

2

1

[%]

[%]

*

0% :

100100%:

P

NRR 2-40 NRS 2-40

1

2

P

1:080 080

2:060 060

3:040 040

4:020 020

2

1

[%]

[%]

*

0% :

100100%:

P

P

NRR 2-40 NRS 2-40

1

2

flashing

briefly

once briefly

once briefly

38

Commissioning – continued –

0 % to 100 % calibration for capacitance level monitoring – continued –

Wait for 30 seconds!
Press button

twice briefly to save
the 100 % level setting and return to the
start window.

Press button 5 times briefly.
Pressing the

button in program mode will
decrement the calibration level in steps of 10 to a
minium of 50 %.

In our example the calibration level is 50 %.
This calibration method saves time and prevents

the loss of feedwater.

1:080 080

2:060 060

3:040 040

4:020 020

2

1

[%]

[%]

*

0% :

50100%:

P

P

NRR 2-40 NRS 2-40

1

2

flashing

5 times briefly

twice briefly

39

Commissioning – continued –

Calibrating the feedback potentiometer of an external control valve

Press button briefly to activate the manual
mode.

Pressing button

or
in this mode enables the manual opening or
closing of an external control valve.

The split-screen start window shows which
GESTRA bus devices can be indicated:

n High level limiter NRS 1-41
n Low level limiter NRS 1-40
n Level switch NRS 2-40
n Level controller NRR 2-40
n Conductivity controller LRR 1-40

Before commissioning the installation calibrate
the 0 % (CLOSED) and 100 % (OPEN) range of the
feedback potentiometer of an external control
valve.

Press button briefly to enter the display window
of the level controller NRR 2-40.

NRR 2-40 NRS 2-40

1

2

MAX

MIN

W

45%

+

-

-05%

XP

20%

70%

1: 080
4: 020

1

[%]

NRR 2-40 NRS 2-40

1

2

MAX

MIN

W

45%

+

-

-05%

XP

20%

70%

1: 080
4: 020

1

[%]

briefly

briefly

40

Commissioning – continued –

Calibrating the feedback potentiometer of an external control valve – continued –

Press and hold down button until the control
valve is closed.

Press button

once briefly to save the current
resistance value of the feedback potentiometer as
0 % setting (valve CLOSED).

Press button

3 times briefly to activate the line
editing mode for calibrating the signal of the feed­back potentiometer.

P

100%

M

0%

P

NRR 2-40

1

100%

M

0%

P

NRR 2-40

1

E

100%

M

0%

P

NRR 2-40

1

flashing

flashing

3 times briefly

hold down

once briefly

41

Commissioning – continued –

Calibrating the feedback potentiometer of an external control valve – continued –

Press and hold down button
until the control valve is open.

Press button

once briefly to activate the line
editing mode for calibrating the signal of the feed­back potentiometer.

M

0% 100%

P

NRR 2-40

1

P

M

0% 100%

P

NRR 2-40

1

flashing

flashing

Press button briefly to select the
calibration of the 100 % setting.

M

0% 100%

P

NRR 2-40

1

briefly

once briefly

hold down

42

Commissioning – continued –

Press button once briefly to return to the start
window.

Calibrating the feedback potentiometer of an external control valve – continued –

Press button 3 times briefly to save the current
resistance value of the feedback potentiometer as
100 % setting (valve OPEN).

Press button

briefly to activate the manual

mode.

E

MAX

MIN

W

045%

+

-

-05%

XP

20%

100%

1: 080
4: 020

1

[%]

NRR 2-40 NRS 2-40

1

2

MAX

MIN

W

045%

+

-

-05%

XP

20%

100%

1: 080
4: 020

1

[%]

NRR 2-40 NRS 2-40

1

2

3 times briefly

briefly

once briefly

43

Commissioning – continued –

Establishing switchpoints and proportional coefficient Xp

Press button once briefly to activate the line
selection mode.

Use buttons

and to scroll back and forth

through the lines.

The split-screen start window shows which GESTRA
bus devices can be indicated:

n High level limiter NRS 1-41
n Low level limiter NRS 1-40
n Level switch NRS 2-40
n Level controller NRR 2-40
n Conductivity controller LRR 1-40

Before commissioning the installation establish the
proportional band and the MAX and MIN switchpoints
for the level controller NRR 2-40.

For level switch NRS 2-40 you can establish four
switchpoints.

Press button 3 times briefly to
enter the window where you can
establish the switchpoints and the Xp
value.

0% :
100%: 100

1:080 080

2:060 060

3:040 040

4:020 020

2

1

[%]

[%]

*

NRR 2-40 NRS 2-40

1

2

P

P

1:080 080

2:060 060

3:040 040

4:020 020

2

1

[%]

[%]

*

0% :

100%: 100

P

NRR 2-40 NRS 2-40

1

2

3 times briefly

once briefly

44

Establishing switchpoints and proportional coefficient Xp – continued –

Press button once briefly to
activate the line editing mode.

Press button

once briefly to move to
the next digit in the same line by pressing
button

.

Press button

twice briefly to
select switchpoint 1 (MAX switch­point) of the NRR 2-40.

2:060 060

3:040 040

4:020 020

2

1

[%]

[%]

*

0% :
100%: 100

1:080 080

P

NRR 2-40 NRS 2-40

1

2

P

2:060 060

3:040 040

4:020 020

2

1

[%]

[%]

*

0% :
100%: 100

1:080 080

P

NRR 2-40 NRS 2-40

1

2

E

2:060 060

3:040 040

4:020 020

2

1

[%]

[%]

*

0% :
100%: 100

1:080 080

NRR 2-40 NRS 2-40

1

2

P

flashing

flashing

Commissioning – continued –

twice briefly

once briefly

once briefly

45

2:060 060

3:040 040

4:020 020

2

1

[%]

[%]

*

0% :
100%: 100

1:070 080

P

NRR 2-40 NRS 2-40

1

2

Press button once briefly.
In our example switchpoint 1

(MAX switchpoint ) shall be established at 70 %.

flashing

Establishing switchpoints and proportional coefficient Xp – continued –

Press button once briefly to
deactivate the line editing mode and
press button

to go to the next line.

Press button

once briefly.

The last digit in the line is selected
(underlined) and remains “0” for our
example MAX switchpoint 70 %.

E

2:060 060

3:040 040

4:020 020

2

1

[%]

[%]

*

0% :
100%: 100

1:070 080

NRR 2-40 NRS 2-40

1

2

P

flashing

Commissioning – continued –

once briefly

once briefly

once briefly

46

Establishing switchpoints and proportional coefficient Xp – continued –

Press button twice briefly to return to the start
window.

Press button once briefly.
Switchpoint 2 marks the upper limit of the proportional

band for the level controller NRR 2-40.
The difference between switchpoint 2 and switchpoint

3 gives the magnitude of the proportional range Xp.
The example setting corresponds to a proportional
band of (060 – 040) 20 %.

The proportional band must be greater than “0”!

Press button

once briefly.
Switchpoint 3 marks the lower limit of the

proportional band for the level controller NRR 2-40.
The proportional coefficient and the MIN switch-

point of the NRR 2-40 as well as the switchpoints
of the NRS 2-40 can be adjusted as described
above.

3:040 040

4:020 020

2

1

[%]

[%]

*

0% :
100%: 100

2:060 060

1:070 080

P

NRR 2-40 NRS 2-40

1

2

4:020 020

2

1

[%]

[%]

*

0% :
100%: 100

2:060 060

1:070 080

3:040 040

P

NRR 2-40 NRS 2-40

1

2

Commissioning – continued –

once briefly

once briefly

twice briefly

47

Adjusting sensitivity range

Press button twice briefly to activate the line
editing mode.

Use buttons

and to toggle between the

two settings.

The split-screen start window shows which
GESTRA bus devices can be indicated:

n High level limiter NRS 1-41
n Low level limiter NRS 1-40
n Level switch NRS 1-42
n Conductivity controller LRR 1-40

Before commissioning the installation adjust
the response sensitivity of the NRS 1-42.

The response sensitivity of the highlevel
and lowlevel limiters are factory set and
cannot be changed.

Press button

twice briefly to select either of the

following two response sensitivities:

n 0.5 µS/cm
n 10 µS/cm

0,5: S/cm10

NRS 1-42

1

P

P

0,5: S/cm10

P

NRS 1-42

1

flashing

Commissioning – continued –

twice briefly

twice briefly

48

Adjusting sensitivity range – continued –

Press button 3 times briefly to return
to the start window.

Press button

briefly.
In our example the response sensitivity

0.5 µS/cm has been selected.

0,5 :S/cm10

P

NRS 1-42

1

flashing

Commissioning – continued –

briefly

3 times briefly

49

Setting relay energizing times

Press button once briefly to activate the line
selection mode.

Use buttons

and to scroll back and forth

through the lines.

The split-screen start window shows which
GESTRA bus devices can be indicated:

n High level limiter NRS 1-41
n Low level limiter NRS 1-40
n Level switch NRS 2-40
n Level controller NRR 2-40
n Conductivity controller LRR 1-40

When commissioning the installation set the
relay energizing times for the individual switch­points.
Note that the relay energizing times of the low­level and high-level limiters are factory set and
cannot be changed with the URB 1.

Press button 4 times briefly to enter the
window for setting the relay energizing times of
the switchpoints.

The symbol

stands for “energizing relay”.

The symbol

stands for “de-energizing relay”.

The digit - for instance “001” – corresponds
to a delay time of 100 mS. The value “030”
corresponds to 3 sec. and max. value “255”
corresponds to 25.5 sec.

1:030 000 030 000

2:000 000 010 000

3:000 000 010 000

4:030 030 030 000

21

NRR 2-40 NRS 2-40

1

2

P

P

2:000 000 010 000

3:000 000 010 000

4:030 030 030 000

21

1:030 000 030 000

NRR 2-40 NRS 2-40

1

2

P

Commissioning – continued –

4 times briefly

once briefly

50

Press button once briefly to move
to the next digit in the same line by
pressing button

.

Press button

once briefly to select the
digit “2”.

Press button

once briefly to activate the line
editing mode.

Setting relay energizing times – continued –

P

2:000 000 010 000

3:000 000 010 000

4:030 030 030 000

21

1:030 000 030 000

NRR 2-40 NRS 2-40

1

2

P

E

2:000 000 010 000

3:000 000 010 000

4:030 030 030 000

21

1:030 000 030 000

NRR 2-40 NRS 2-40

1

2

P

2:000 000 010 000

3:000 000 010 000

4:030 030 030 000

21

1:020 000 030 000

P

NRR 2-40 NRS 2-40

1

2

flashing

flashing

flashing

Commissioning – continued –

once briefly

once briefly

once briefly

51

Press button twice briefly to de-activate the
line editing mode.

In our example the relay energizing time for the
MAX switchpoint of the NRR 2-40 is 2 sec.

E

2:000 000 010 000

3:000 000 010 000

4:030 030 030 000

21

1:020 000 030 000

P

NRR 2-40 NRS 2-40

1

2

Press button twice briefly to return
to the start window.

Press button

once briefly.

Switchpoint 2 and switchpoint 3 of the
NRR 2-40 mark the upper and lower
limit of the proportional band. The relay
energizing and de-energizing times can
not be adjusted and have the number
“000”.

The relay energizing times of all other
switchpoints can be adjusted as described
above.

Setting relay energizing times

 continued 

2:000 000 010 000

3:000 000 010 000

4:030 030 030 000

21

1:020 000 030 000

P

NRR 2-40 NRS 2-40

1

2

3:000 000 010 000

4:030 030 030 000

21

1:020 000 030 000

2:000 000 010 000

P

NRR 2-40 NRS 2-40

1

2

Commissioning – continued –

twice briefly

once briefly

twice briefly

Press button once briefly.
In the second column you can adjust

the relay de-energizing delay.
Press button

/ to activate /

deactivate the line editing mode.

2:000 000 010 000

3:000 000 010 000

4:030 030 030 000

21

1:020 000 030 000

P

NRR 2-40 NRS 2-40

1

2

once briefly

52

Adjusting conductivity controller

Press button twice briefly to activate the line
editing mode.

Use buttons

and to scroll back and forth

through the lines.

The split-screen start window shows which
GESTRA bus devices can be indicated:

n High level limiter NRS 1-41
n Low level limiter NRS 1-40
n Level switch NRS 2-40
n Level controller NRR 2-40
n Conductivity controller LRR 1-40

Press button twice briefly to enter the para­meterisation mode for the following settings:

n µS/cm or ppm
n Measuring range
n Max. conductivity value
n Setpoint
n Min. conductivity value

MIN:

MAX:
w:

07000,0
05000,0
01000,0

0,5-12000

Range:

ppm

P

S/cm

S/cm

S/cm

S/cm

S/cm

P

MIN:

MAX:
w:

07000,0
05000,0
01000,0

0,5-12000

Range:

ppm

S/cm

S/cm

S/cm

S/cm

S/cm

P

flashing

Commissioning – continued –

twice briefly

twice briefly

53

Press button once briefly to de-activate the
line editing mode.

All conductivity readings will now be indicated
in [ppm].

Press button

once briefly.

In this line you can calibrate the graphical
representation (bar chart) of the conductivity value
shown in the main window. This setting will also
standardize the actual value output (4-20mA).

First ascertain the conductivity measuring range
used in your installation (e. g. 0.5 µS/cm to
20 µS/cm).

Press button

once briefly to select the unit

[ppm].

Press button

once briefly to activate the line

editing mode.
You can choose between the following ranges:

n 0.5 to 20 µS/cm n 0.5 to 1000 µS/cm
n 0.5 to 100 µS/cm n 0.5 to 2000 µS/cm
n 0.5 to 200 µS/cm n 0.5 to 6000 µS/cm
n 0.5 to 500 µS/cm n 0.5 to 12000 µS/cm

Adjusting conductivity controller – continued –

MIN:

MAX:
w:

07000,0
05000,0
01000,0

0,5-12000

Range:

ppm

S/cm

S/cm

S/cm

S/cm

S/cm

P

MIN:

MAX:
w:

07000,0
05000,0
01000,0

0,5-12000

Range:

ppm

S/cm

S/cm

S/cm

S/cm

S/cm

P

E

MIN:

MAX:
w:

07000,0
05000,0
01000,0

0,5-12000

ppm

S/cm

S/cm

S/cm

S/cm

S/cm

P

Range:

P

MIN:

MAX:
w:

07000,0
05000,0
01000,0

0,5-12000

ppm

S/cm

S/cm

S/cm

S/cm

S/cm

P

Range:

flashing

flashing

Commissioning – continued –

once briefly

once briefly

once briefly

once briefly

54

Press button once briefly to de-activate the line
editing mode.

Press button

once briefly to enter the line
where the conductivity setpoint of the LRR 1-40
can be adjusted.

Press button

7 times briefly to select the
range 0.5 to 20 µS/cm.

Press button

once briefly to activate the
line editing mode.

Adjusting conductivity controller – continued –

MIN:

MAX:
w:

07000,0
05000,0
01000,0

0,5-20

ppm

S/cm

S/cm

S/cm

S/cm

S/cm

P

Range:

E

MIN:

MAX:
w:

07000,0
05000,0
01000,0

0,5-12000

ppm

S/cm

S/cm

S/cm

S/cm

S/cm

P

Range:

MIN:

MAX:

07000,0
05000,0
01000,0

0,5-12000

ppm

S/cm

S/cm

S/cm

S/cm

S/cm

P

Range:

w:

P

MIN:

MAX:

07000,0
05000,0
01000,0

0,5-12000

ppm

S/cm

S/cm

S/cm

S/cm

S/cm

P

Range:

w:

flashing

flashing

Commissioning – continued –

7 times briefly

once briefly

once briefly

once briefly

55

Press button twice briefly to select the
digit “3”.

Press button

5 times briefly.

In our example a conductivity setpoint of
3000 µS/cm has been adjusted.

Press button

once briefly to move the

cursor one step further.

Press button

once briefly to enter the line where
the MIN conductivity value of the LRR 1-40 can be
adjusted.

The MIN switchpoint of the LRR 1-40 can be
adjusted in the same way as the conductivity
setpoint.

Adjusting conductivity controller – continued –

MIN:

MAX:

07000,0
05000,0
01000,0

0,5-12000

ppm

S/cm

S/cm

S/cm

S/cm

S/cm

P

Range:

w:

E

MIN:

MAX:

07000,0
03000,0
01000,0

0,5-12000

ppm

S/cm

S/cm

S/cm

S/cm

S/cm

P

Range:

w:

E

MIN:

MAX:

07000,0
03000,0
01000,0

0,5-12000

ppm

S/cm

S/cm

S/cm

S/cm

S/cm

P

Range:

w:

MAX:

07000,0
03000,0
01000,0

0,5-12000

ppm

S/cm

S/cm

S/cm

S/cm

S/cm

P

Range:

w:

MIN:

flashing

flashing

Commissioning – continued –

once briefly

twice briefly

5 times briefly

once briefly

56

Press button once briefly to de-activate the line
editing mode.

Press button

once briefly to enter the para-

meterisation mode for the following settings:

n Proportional range Xp
n Controller hysteresis
n 24-h purging pulse for continuous blowdown valve
n Operating position of continuous blowdown valve
n Relay contact 4: / automatic intermittent

boiler blowdown

Press button

once briefly to enter the line
where the MAX conductivity value of the LRR 1-40
can be adjusted.

The MAX switchpoint of the LRR 1-40 can be
adjusted in the same way as the conductivity
setpoint.

Press button

twice briefly to activate
the line editing mode.

In this line you can set the proportional
band Xp.

Xp = 000: Two position (on-off) control
Xp > 000: Modulating control

Adjusting conductivity controller – continued –

07000,0
03000,0
01000,0

0,5-12000

ppm

S/cm

S/cm

S/cm

S/cm

S/cm

P

Range:

w:

MIN:

MAX:

MIN:

MAX:
w:

07000,0
05000,0
01000,0

0,5-12000

Range:

ppm

P

S/cm

S/cm

S/cm

S/cm

S/cm

E

08 %

10 %

000 %

Hyst [w]:

:

24 h:

J /N

Xp:

4: MIN

Auto

P

P

08 %

10 %

000 %

Hyst [w]:

:

24 h:

J /N

Xp:

4: MIN

Auto

P

flashing

Commissioning – continued –

once briefly

once briefly

once briefly

twice briefly

57

Press button twice briefly.
to select the digit “2”.

Press button

twice briefly.

In our example the proportional range Xp was set
to 20 %.

The controller works now as three-position step­ping controller. As a consequence the hysteresis
and the operating position do not have to be
adjusted.

Press button

once briefly to move the

cursor one step further.

Press button

once briefly to enter the line
where the control hysteresis of the LRR 1-40 can
be adjusted.

The hysteresis can be adjusted within a range of
0 % to 25 %.

The control hysteresis of the LRR 1-40 can be
adjusted in the same way as the proportional
band Xp.

If Xp > 0 this function is deactivated!

Adjusting conductivity controller – continued –

E

08 %

10 %

000 %

Hyst [w]:

:

24 h:

J /N

Xp:

4: MIN

Auto

P

08 %

10 %

020 %

Hyst [w]:

:

24 h:

J /N

Xp:

4: MIN

Auto

P

08 %

10 %

020 %

Hyst [w]:

:

24 h:

J /N

Xp:

4: MIN

Auto

P

E

08 %

10 %

020 %

:

24 h:

J /N

Xp:

4: MIN

Auto

P

Hyst [w]:

flashing

flashing

Commissioning – continued –

once briefly

twice briefly

twice briefly

once briefly

58

Press button once briefly to enter
the line where the operating position of
the continuous blowdown valve can be
changed.

Press button

once briefly to enter the window
where the operating position and the feedback
potentiometer of the continuous blowdown valve can
be adjusted.

If Xp > 0 the operating position setting is deactivated.
The window shows also the reference values (in %)

as indicated in the scale of the GESTRA continuous
blowdown valve BAE 46, BAE 47 (0 = 0%, 4 = 100 %)
and the current position of the continuous blowdown
valve in %.

Press button

once briefly to enter the
line where the 24 h purging pulse for the
continuous blowdown valve can be adjusted.

Use buttons

and to activate or

deactivate the 24 h purging pulse .

Press button

twice briefly to activate the line

editing mode.
Use button

and to change the values of the

digits. Press

to go to the next digit.

The value “008” corresponds to an opening position
of 8 %. Max. value: 25 %.

Adjusting conductivity controller – continued –

08 %

10 %

020 %

:

J /N

Xp:

4: MIN

Auto

P

Hyst [w]:

24 h:

08 %

10 %

020 %

24 h:

J /N

Xp:

4: MIN

Auto

P

Hyst [w]:

:

P

0%

100 %

50 %

000

100

:000

M

P

P

0%

100 %

50 %

000

100

:008

M

P

flashing

Commissioning – continued –

once briefly

once briefly

once briefly

twice briefly

59

Press button once briefly to enter the line
where the 0 % value of the feedback poten tio­meter of the continuous blowdown valve can be
adjusted.

Press button

once briefly to

activate the line editing mode.

Press button

once briefly.

The value 008 = 8 % operating position is
now selected.

Press and hold down button
until the continuous blowdown
valve is closed.

Adjusting conductivity controller – continued –

0%

100 %

50 %

100

:008

M

P

000

0%

100 %

50 %

100

:008

M

P

000

P

0%

100 %

0%

100

:008

M

P

000

flashing

flashing

0%

100 %

50 %

000

100

:008

M

P

E

Commissioning – continued –

once briefly

once briefly

once briefly

hold down

60

Press button once briefly to select the 100%
calibration postion.

Press button

once briefly to activate
the line editing mode.

Press button

once briefly to save the
current resistance value of the feedback
potentiometer as 0 % position (valve
CLOSED).

Press and hold down button

until
the continuous blowdown valve is
completely open.

Adjusting conductivity controller – continued –

E

0%

100 %

0%

100

:008

M

P

000

0%

100 %

0%

:008

M

P

000

100

P

0%

100 %

0%

:008

M

P

000

100

0%

100 %

100 %

:008

M

P

000

100

flashing

flashing

Commissioning – continued –

once briefly

once briefly

once briefly

hold down

61

Press button once briefly to activate the line
selection mode.

Press button

4 times briefly.

In this line you can decide whether you want to
use relay contact 4 (LRR 1-40) for MIN alarm or
for automatic intermittent boiler blowdown.

The relay contact 4 of the LRR 1-40 is located
across terminals “28”, “29” and “30”.

Please observe the wiring diagram of the
LRR 1-40.

Press button

3 times briefly.

E

08 %

10 %

020 %

Hyst [w]:

:

24 h:

J /N

Xp:

4: MIN

Auto

P

P

08 %

10 %

020 %

Hyst [w]:

:

24 h:

J /N

Xp:

4: MIN

Auto

P

08 %

10 %

020 %

Hyst [w]:

:

24 h:

J /N

Xp:

4: MIN

Auto

P

Press button once briefly to save the current
resistance value of the feedback potentiometer as
100% position (valve OPEN).

Adjusting conductivity controller – continued –

E

0%

100 %

100 %

:008

M

P

000

100

Commissioning – continued –

once briefly

3 times briefly

once briefly

4 times briefly

62

Press button

once briefly to activate the

line editing mode.

Adjusting conductivity controller – continued –

P

08 %

10 %

020 %

Hyst [w]:

:

24 h:

J /N

Xp:

4: MIN

Auto

P

flashing

Press button once briefly to activate the auto­matic intermittent blowdown function.

Press button

once briefly to enter the para-

meterisation mode for the following settings:

n Frequency of the intermittent blowdown in hours
n Duration of the intermittent blowdown in sec-

onds

Press button

once briefly to activate relay

contact 4 for establishing for instance a MIN alarm.
The relay contact 4 of the LRR 1-40 is located

across terminals “28”, “29” and “30”.
Please observe the wiring diagram of the

LRR 1-40.

08 %

10 %

020 %

Hyst [w]:

:

24 h:

J /N

Xp:

4: MIN

P

Auto

08 %

10 %

020 %

Hyst [w]:

:

24 h:

J /N

Xp:

4: MIN

Auto

P

E

:001 h
:01s

P

flashing

flashing

Commissioning – continued –

once briefly

once briefly

once briefly

once briefly

63

Press button

once briefly to activate the

line selection mode.
The frequency of intermittent blowdown

can be adjusted in the line editing mode in the
same way as the proportional band Xp.

Press button

/ to activate / deactivate

the line editing mode.

Adjusting conductivity controller – continued –

P

:001 h
:01s

P

PP

Commissioning – continued –

Press button twice briefly to accept and save
the configuration.

Press button

twice briefly to

return to the start window.

Press button

once briefly.

The duration of intermittent blowdown can be
adjusted in the line editing mode in the same way
as the proportional band Xp.

In our example the blowdown frequency was set to
1 hour and the blowdown duration to 1 second.

:001 h
:01s

P

E

08 %

10 %

020 %

Hyst [w]:

:

24 h:

J /N

Xp:

4: MIN

Auto

P

once briefly

once briefly

twice briefly

twice briefly

64

Adjusting linear (LIN) temperature compensation

Press button once briefly to
activate the line selection mode.

The split-screen start window shows which
GESTRA bus devices can be indicated:

n High level limiter NRS 1-41
n Low level limiter NRS 1-40
n Level switch NRS 2-40
n Level controller NRR 2-40
n Conductivity controller LRR 1-40

Press button 4 times briefly to enter the
parameterisation mode for the following
settings:

n Linear temperature compensation [%/°C]
n Recording a temperature curve
n Cell constant C of the conductivity electrode

In our example we start from the default fac­tory setting “TK:LIN”.

OFF

Tk [Auto]
Temp.
C.

: 019,7 °C
: 0,210

NORM

:/StartStop

AUTO

Tk:
Tk [Lin ]

: 2,1 %/°C

LIN

P

OFF

Tk [Auto]
Temp.
C.

: 019,7 °C
: 0,210

NORM

:/StartStop

P

AUTO

Tk:

Tk [Lin ]

: 2,1 %/°C

LIN

P

Commissioning – continued –

4 times briefly

once briefly

65

Press button once briefly to activate the line
editing mode.

If the reading of the calibrated conductivity
meter does not tally the value indicated by the
URB 1 the compensation gradient has to be
changed until the two values agree.

Example: With a gradient of 1.9% / °C the two
readings tally.

Press button

once briefly to select the

digit “1”.

Press button

once briefly to enter the line where
the linear temperature compensation [%/°C] can be
adjusted.

The gradient (default setting: 2.1[%/ °C]) is normally
used for steam boilers operationg with constant
pressure. When the boiler is at full working pressure
compare the indicated value with the reading of a
calibrated conductivity meter – the two values must
tally.

Press button

once briefly to move the
cursor one step further.

Adjusting linear (LIN) temperature compensation – continued –

OFF

Tk [Auto]
Temp.
C.

: 019,7 °C
: 0,210

NORM

:/StartStop

P

AUTO

Tk:

Tk [Lin ]

: 2,1 %/°C

LIN

P

OFF

Tk [Auto]
Temp.
C.

: 019,7 °C
: 0,210

NORM

:/StartStop

P

AUTO

Tk:

Tk [Lin ]

: 2,1 %/°C

LIN

OFF

Tk [Auto]
Temp.
C.

: 019,7 °C
: 0,210

NORM

:/StartStop

P

AUTO

Tk:

Tk [Lin ]

: 1,1 %/°C

LIN

OFF

Tk [Auto]
Temp.
C.

: 019,7 °C
: 0,210

NORM

:/StartStop

P

AUTO

Tk:

Tk [Lin ]

: 1,1 %/°C

LIN

E

flashing

flashing

flashing

Commissioning – continued –

once briefly

once briefly

once briefly

once briefly

66

Press button once briefly to accept and
save the configuration.

In our example a gradient of 1.9 % /°C was
adjusted.

Press button

twice briefly to return to

the start window.

Press button

twice briefly to select the

digit “9”.

Adjusting linear (LIN) temperature compensation – continued –

OFF

Tk [Auto]
Temp.
C.

: 019,7 °C
: 0,210

NORM

:/StartStop

P

AUTO

Tk:

Tk [Lin ]

: 1,9 %/°C

LIN

E

OFF

Tk [Auto]
Temp.
C.

: 019,7 °C
: 0,210

NORM

:/StartStop

P

AUTO

Tk:

Tk [Lin ]

: 1,9 %/°C

LIN

flashing

Commissioning – continued –

twice briefly

once briefly

twice briefly

67

Adjusting standard curve (NORM) temperature compensation

Press button twice briefly to activate the line
editing mode.

The split-screen start window shows which
GESTRA bus devices can be indicated:

n High level limiter NRS 1-41
n Low level limiter NRS 1-40
n Level switch NRS 2-40
n Level controller NRR 2-40
n Conductivity controller LRR 1-40

Press button 4 times briefly.
The NORM (standard curve) temperature compensation is

suitable for boilers operating with variable pressure, which
means that the boiler does not have a fixed working
pressure (e. g. low load 10 bar, full load 15 bar).

The standard curves of 11 feedwater conditioning agents
with different basic conductivities compensate for thermal
influences on measurements within the operating range.
In our example we start from the default factory setting
“TK:LIN”.

OFF

Tk [Auto]
Temp.
C.

: 019,7 °C
: 0,210

NORM

:/StartStop

AUTO

Tk:
Tk [Lin ]

: 2,1 %/°C

LIN

P

OFF

Tk [Auto]
Temp.
C.

: 019,7 °C
: 0,210

NORM

:/StartStop

P

AUTO

Tk:

Tk [Lin ]

: 2,1 %/°C

LIN

P

flashing

Commissioning – continued –

4 times briefly

twice briefly

68

Press button once briefly to activate the line selection
mode and to enter the parameterisation mode for the
following settings:

n NORM (standard curve) temperature compensation

[% / °C]

n Recording a temperature curve
n Cell constant C of the conductivity electrode

Our example shows “00” (factory setting), which means
that no standard curve has been selected and activated.

Press button

once briefly to enter the line

where you can select a standard curve.

Press button

twice briefly to select the function

“NORM”.
The function “NORM” allows the retrieval of 9

differnt standard temperature curves stored in
the URB 1. The curves are applicable for various
feedwater conditioning agents with different basic
conductivities.

Adjusting NORM (standard curve) temperature compensation – continued –

OFF

Tk [Auto]
Temp.
C.

: 019,7 °C
: 0,210

NORM

:/StartStop

P

AUTO

Tk:

Tk [Lin ]

: 2,1 %/°C

LIN

OFF

Tk [Auto]
Temp.
C.

: 019,7 °C
: 0,210

NORM

:/StartStop

P

AUTO

Tk:

Tk [Tab ]

: 00

LIN

flashing

OFF

Tk [Auto]
Temp.
C.

: 019,7 °C
: 0,210

NORM

:/StartStop

P

AUTO

Tk:

Tk [Tab ]

:00

LIN

E

Commissioning – continued –

Press button once briefly to activate the line
editing mode.

The first digit (10) is active.
Press button

to move to the second digit (1).

flashing

P

OFF

Tk [Auto]
Temp.
C.

: 019,7 °C
: 0,210

NORM

:/StartStop

P

AUTO

Tk:

Tk [Tab ]

: 00

LIN

twice briefly

once briefly

once briefly

once briefly

69

No. Conditioning agent Basic conductivity at 25 °C

1 Caustic soda 260 [µS/cm]
2 Caustic soda 1080 [µS/cm]
3 Caustic soda 5400 [µS/cm]
4 Caustic soda 11000 [µS/cm]
5 Trisodium phosphate 190 [µS/cm]
6 Trisodium phosphate 1100 [µS/cm]
7 Trisodium phosphate 5900 [µS/cm]
8 Trisodium phosphate 11200 [µS/cm]
9 Sodium sulphite 980 [µS/cm]

10 Dipolique 444

®

200 [µS/cm]

11 Levoxin

®

195 [µS/cm]

Adjusting NORM (standard curve) temperature compensation – continued –

Commissioning – continued –

Press button once briefly to select the
digit “1”.

OFF

Tk [Auto]
Temp.
C.

: 019,7 °C
: 0,210

NORM

:/StartStop

P

AUTO

Tk:

Tk [Tab ]

: 01

LIN

flashing

Press button once briefly to accept and save
the configuration and to activate the standard
curve “1”.

The temperature values of the standard curve “1”
are based on the conditioning agent caustic soda
with a basic conductivity of 260 µS/cm at 25 °C.

E

OFF

Tk [Auto]
Temp.
C.

: 019,7 °C
: 0,210

NORM

:/StartStop

P

AUTO

Tk:

Tk [Tab ]

: 01

LIN

once briefly

once briefly

DIPOLIQUE 444® is a registered trademark of DIPOLIQUE GmbH, Stuhr, Germany
LEVOXIN

®

is a registered trademark of LANXESS GmbH, Leverkusen, Germany

70

Adjusting NORM (standard curve) temperature compensation – continued –

Press button once briefly to activate the line
editing mode.

P

OFF

Temp.
C.

: 019,7 °C
: 0,210

NORM

P

AUTO

Tk:

Tk [Tab ]

: 01

LIN

Tk [Auto]

: Stop / Start

flashing

Commissioning – continued –

Press button once briefly to select the
function “Start”.

OFF

Temp.
C.

: 019,7 °C
: 0,210

NORM

P

AUTO

Tk:

Tk [Tab ]

: 01

LIN

Tk [Auto]

: StartStop /

flashing

once briefly

once briefly

Press button once briefly to enter the line where you
can start recording the temperature / conductivity curve
that is characteristic of your steam boiler.

The system detects the temp./conductivity values from
room temperature to operating temperature.

In case of variable pressure operation we recommend that
you also record the AUTO curve. If the standard curves are
not suitable, you can use the AUTO curve.

OFF

Temp.
C.

: 019,7 °C
: 0,210

NORM

P

AUTO

Tk:

Tk [Tab ]

: 01

LIN

Tk [Auto]

: Stop / Start

once briefly

71

Adjusting NORM (standard curve) temperature compensation – continued –

Commissioning – continued –

Press button once briefly to accept and save the
configuration.

Raise temp./pressure until the steam boiler settles at full
working pressure (in case of variable pressure operation
until the highest operating pressure is reached).

The LRR 1-40 will now record the temperature /
conductivity values and saves them as AUTO curve in the
URB 1.

The number of recorded temp./conductivity values is
indicated in the line “Temp”.

Press button

once briefly.
The recording of the AUTO curve is finished

once the steam boiler has reached its working
pressure.

In our example 15 temp./conductivity values
were recorded. A temperature of 181.7°C was
detected at the measuring point of the conduc­tivity electrode LRG 16-40/LRG 16-41, which
corresponds to a boiler pressure of 10.3 bar.

E

OFF

Temp.
C.

: 019,7 °C 1
: 0,210

NORM

P

AUTO

Tk:

Tk [Tab ]

: 01

LIN

Tk [Auto]

: StartStop /

OFF

Temp.
C.

: 0181,7 °C 15
: 0,210

NORM

P

AUTO

Tk:

Tk [Tab ]

: 01

LIN

Tk [Auto]

: StartStop /

P

flashing

once briefly

once briefly

Press button once briefly to select the function
“Stop”.

The recording of the temperature / conductivity
values is now finished.

The boiler specific AUTO curve can be activated on
the display “TK: AUTO”.

OFF

Temp.
C.

: 0181,7 °C 15
: 0,210

NORM

P

AUTO

Tk:

Tk [Tab ]

: 01

LIN

Tk [Auto]

: Stop / Start

flashing

Press button 3 times briefly to return to the
start window.

once briefly

3 times briefly

72

Enabling automatic (AUTO) temperature compensation

Press button twice briefly
to activate the line editing mode.

The split-screen start window shows which GESTRA
bus devices can be indicated:

n High level limiter NRS 1-41
n Low level limiter NRS 1-40
n Level switch NRS 2-40
n Level controller NRR 2-40
n Conductivity controller LRR 1-40

Press button 4 times briefly.
The AUTO curves for temperature compensation are

suitable for boilers operating with variable pressure,
which means that the boiler does not have a fixed
working pressure/temperature (e. g. low load 10 bar,
full load 15 bar).

The procedure for recording an AUTO curve is
described on pages 69 to 71.

In our example we have started from the setting
“TK:NORM”.

OFF

Tk [Auto]
Temp.
C.

: 0181,7 °C 15
: 0,210

NORM

:/StartStop

AUTO

Tk:

Tk [Tab ]

:01

LIN

P

P

OFF

Tk [Auto]
Temp.
C.

: 0181,7 °C 15
: 0,210

NORM

:/StartStop

AUTO

Tk:

Tk [Tab ]

:01

LIN

P

flashing

Commissioning – continued –

4 times briefly

twice briefly

73

Press button twice briefly to accept and save the
configuration.

In our example the AUTO curve recorded and saved in the
URB 1 has been activated with 15 temp./conductivity
values.

The AUTO curve can be overwritten by a newly recorded
curve at any time.

The procedure for recording an AUTO curve is described
on pages 69 to 71.

Press button

once briefly to return to the start
window.

Press button

once briefly to select the function
“AUTO”.

Please note:
If no AUTO curve is stored, the URB 1 switches to
linear temperature compensation.

The digit to the rigth in the line “Temp.” indicates
that an AUTO curve ist stored.
In our example 15 temperatures values are stored
in the URB 1

Enabling automatic (AUTO) temperature compensation – continued –

OFF

Tk [Auto]
Temp.
C.

: 0181,7 °C 15
: 0,210

NORM

:/StartStop

AUTO

Tk:

Tk [Tab ]

:01

LIN

P

E

OFF

Temp.
C.

: 0181,7 °C 15
: 0,210

NORM

AUTO

Tk:

LIN

P

flashing

Commissioning – continued –

once briefly

twice briefly

once briefly

74

Disabling temperature compensation

Press button twice briefly to activate the line
editing mode.

The split-screen start window shows which
GESTRA bus devices can be indicated:

n High level limiter NRS 1-41
n Low level limiter NRS 1-40
n Level switch NRS 2-40
n Level controller NRR 2-40
n Conductivity controller LRR 1-40

Press button 4 times briefly.
Some industrial applications may require disabling

the temperature compensation. In this mode all
conductivity measurements indicated by the URB 1
are absolut readings of the current conductivity.

In our example we start from the default factory
setting “TK:LIN”.

OFF

Tk [Auto]
Temp.
C.

: 019,7 °C
: 0,210

NORM

:/StartStop

AUTO

Tk:
Tk [Lin ]

: 2,1 %/°C

LIN

P

OFF

Tk [Auto]
Temp.
C.

: 019,7 °C
: 0,210

NORM

:/StartStop

P

AUTO

Tk:

Tk [Lin ]

: 2,1 %/°C

LIN

P

flashing

Commissioning – continued –

4 times briefly

twice briefly

75

Press button once briefly to accept and save the
configuration.

The temperature compensation is now deactivated.

Press button

once briefly to return to the start
window.

Press button

3 times briefly to select the “OFF”.

Disabling automatic (AUTO) temperature compensation – continued –

Tk [Auto]
Temp.
C.

: 019,7 °C
: 0,210

NORM

:/StartStop

P

AUTO

Tk:

Tk [Lin ]

: 2,1 %/°C

LIN

OFF

Tk [Auto]
Temp.
C.

: 025,0 °C
: 0,210

NORM

:/StartStop

AUTO

Tk:

LIN

OFF

P

E

flashing

Commissioning – continued –

3 times briefly

once briefly

once briefly

76

Manual operation of an external control valve

Press button briefly to enter the
display window of the level controller
NRR 2-40.

The split-screen start window shows which
GESTRA bus devices can be indicated:

n High level limiter NRS 1-41
n Low level limiter NRS 1-40
n Level switch NRS 2-40
n Level controller NRR 2-40
n Conductivity controller LRR 1-40

NRR 2-40 NRS 2-40

1

2

MAX

MIN

W

45%

+

-

-05%

XP

20%

70%

1: 080
4: 020

1

[%]

NRR 2-40 NRS 2-40

1

2

MAX

MIN

W

45%

+

-

-05%

XP

20%

70%

1: 080
4: 020

1

[%]

Press button briefly to activate the manual
mode.

Use buttons

and in this mode to open

and close manually an external control valve.
Press button

a second time to disable the
manual mode and to move the control valve
back into the position dictated by the controller
NRR 2-40.

Operation

briefly

briefly

77

Standby operation with the steam boiler disconnected

Use an external switch to enable the stand-by mode of
the conductivity control.

After switching off the burner of the steam boiler you can
deactivate the control of the continuous and intermittent
blowdown valves in order to avoid loss of boiler water
(stand-by operation).

After returning to normal operation the continuous blow­down valve moves into the control position and an inter­mittent blowdown pulse is given (if activated).

Please observe the wiring diagram shown in the
installation & operating manual of the LRR 140.

The split-screen start window shows which
GESTRA bus devices can be indicated:

n High level limiter NRS 1-41
n Low level limiter NRS 1-40
n Level switch NRS 2-40
n Level controller NRR 2-40
n Conductivity controller LRR 1-40

045%

3450S/cm

S/cm

W

W

STAND-BY

Operation – continued –

78

The sources of malfunctions occuring in CAN bus systems operating with several bus-based stations
must be analysed systematically since faulty components or incorrect settings can give rise to negative
interactions with intact bus devices in the CAN bus system. These unwanted interactions can cause
error messages in fully functional bus devices, which will make fault detection even more difficult.

We recommend the following systematic fault finding procedure:

Systematic malfunction analysis

System Malfunctions

Step 1 (Start)

Detach terminal strips of
all bus-based sensors!

Level electrode
Conductivity electrode
Pressure sensor
Temperature sensor etc.

Step 3

Apply mains voltage
to bus devices of the
system
e. g. NRS ...
and NRG ...

Step 2

Plug in terminal strip
of the sensor
of the system
e. g. NRS ...
and
NRG ... (sensor)

System O.K.

Detach terminal
strips between
BUS nodes
of the system
e. g. NRS ...
and NRG ... !

System fault

Use
faultfinding list
to identify the fault(s)!

Cut off power supply to
the equipment!

Test

Use

faultfinding list

to eliminate the fault(s)!

Final test − have all
faults been eliminated?

Check next system

79

The thermal fuse of one of the level
electrodes has been triggered.

Make sure that the level electrode has been

mounted as specified in the installation manual.
Check whether external influences have caused

built-up of heat in the electrode casing.

The data communication in the CAN bus
line is disrupted.

Make sure that the CAN bus line has been wired

according to the wiring diagram.
Make sure that the CAN bus is not interrupted

due to conductor breakage.
Make sure the controllers and electrodes feature

the correct node IDs.

System malfunctions – continued –

Fault finding list for troubleshooting

045%

3450S/cm

S/cm

W

W

NRR 2-40

°C

°C

flashing

flashing

The thermal fuse of the conductivity
electrode has been triggered.

Make sure that the conductivity electrode has

been mounted as specified in the installation
manual.

Check whether external influences have caused
built-up of heat in the electrode casing.

LRG 16-40

°C

S

The conductivity electrode is defective.

The temperature sensor of the conductivity
electrode is either short circuited or interrupted.

Replace conductivity electrode
LRG 1640/41.

LRG 16-40

°C

S

5 times briefly

5 times briefly

5 times briefly

80

The CAN bus communication of a controller
is disrupted.

Make sure that the controller and the level

or conductivity electrode have been wired as
specified in the wiring diagram.

In our example there is a disruption in the
CAN bus communication of the low-level
electrode 2 type NRG 16-40.

System malfunctions – continued –

Fault finding list for troubleshooting – continued –

LRG 16-40

°C

S

NRS 1-40 ID: 001 S2
NRS 1-41 ID: 006
NRS 1-42 ID: OFF
NRS 2-40 ID: 039
NRR 2-40 ID: 040
LRR 1-40 ID: 050

P

P

NRS 1-40 ID: 001 St
NRS 1-41 ID: 006
NRS 1-42 ID: OFF
NRS 2-40 ID: 039
NRR 2-40 ID: 040
LRR 1-40 ID: 050

P

P

The conductivity electrode is defective.

The internal connecting cables of the
conductivity electrode are short circuited or
interrupted.

Replace conductivity electrode
LRG 1640/41.

The CAN bus communication of a controller
is disrupted.

Make sure that the controller and the level

or conductivity electrode have been wired as
specified in the wiring diagram.

In our example there is a disruption in the
CAN bus communication of the controller 1
type NRS 1-40.

If faults occur that are not listed above or cannot
be corrected, please contact our service centre
or authorized agency in your country.

5 times briefly

once briefly

once briefly

81

Note on the Declaration of Conformity / Declaration by the Manufacturer

Annex

For details on the conformity of our equipment according to the European Directives see our
Declaration of Conformity or our Declaration of Manufacturer.

The current Declaration of Conformity / Declaration of Manufacturer are available in the Internet under
www.gestra.de/documents or can be requested from us.

82

For your Notes

83

For your Notes

84

810375-07/05-2017csa (808472-10)

·

GESTRA AG · Bremen · Printed in Germany

GESTRA AG

Münchener Straße 77
28215 Bremen
Germany
Telefon [phone]
Telefax [phone]
E-mail [e-mail]
Web www.gestra.de

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