WELBA WTS-300 User manual

Universal tank control
WTS-300 Firmware V2.0
Installation and operating instructions
for plant engineering companies,
installers and service engineers
WTS-300 G1
welba.de
Programmable via
configuration software
WELBA „KONSOFT"
Measuring - Controlling - Regulating
All from the same source
105204 WTS-300 V2.0 - 11.01.2019

Page 2 Page 3
Publisher:
WELBA GmbH
Electronic Control Engineering
Gewerbepark Siebenmorgen 6
D-53547 Breitscheid
Contents
+49 (0)2638 / 9320-0
+49 (0)2638 / 9320-20
[email protected]
www.welba.de
Contents
Tel:
Fax:
E-mail:
Internet:
1 Introduction
1.1 Information about this operating instructions Page 4
1.2 Limitation of liability Page 5
1.3 Device description Page 6
1.4 Type designation Page 6
1.5 Items supplied Page 7
1.6 Dimensions Page 7
1.7 Technical data Page 8
1.8 Sensor dimensions and technical data sensor Page 9
2 Safety
2.1 General Information Page 10
2.2 Intended use Page 12
2.3 Wiring, screening, earthing Page 13
2.4 Electrical safety Page 13
3 Installation
3.1 Location and climatic conditions Page 14
3.2 Unpacking and storage Page 14
3.3 Installation of housing Page 14
3.4 Fitting the sensor Page 15
4 Electrical connection
4.1 Safety during installation Page 16
4.2 Procedure Page 16
4.3 Wiring Page17
4.4 Connection diagram Page 18
4.5 Wiring the digital inputs Page 19
4.6 Connection robot Page 19
4.7 Connection of external pressure sensor (optional) Page 19
5 Operation
5.1 Function overview Page 20
5.2 The configuration software KONSOFT Page 23
5.3 Guideline for the initial installation / parameterization Page 24
5.4 Setting the date and time Page 26
5.5 Operation in levels Page 27
5.6 Operation of working level Page 28
5.6.1 Button functions Page 29
5.6.2 Meaning of the LEDs Page 30
5.6.3 Operation modes Page 32
6 Cleaning
6.1 Cleaning methods (cooling tank-configurations) Page 36
6.1.1 Circulation cleaning with a beaker Page 36
6.1.2 Circulation cleaning with two dosing pumps Page 36
6.1.3 Displacement cleaning with feed container, dosing pumps
in circulation line Page 37
6.1.4 Displacement cleaning with feed container and dosing pumps Page 37
6.2 Page 38Cleaning programme diagram
6.3 Explanation and programming of the cleaning process Page 39
6.3.1 Service functions for testing the cleaning cycle Page 46
7. Tank monitor and general fault handling
7.1 Description of tank monitor operation Page 48
7.2 Tank monitor: Milk removal YES or NO Page 50
7.3 Tank monitor: Handling multiple faults Page 53
7.4 Tank monitor: Display fault memory Page 53
7.5 Listing fault codes and their description Page 54
7.5.1 Critical tank monitor alarms (red) Page 54
7.5.2 Informative tank monitor alarms (green) Page 55
7.5.3 System alarms cleaning Page 56
7.5.4 System alarms cooling Page 58
7.5.5 System alarms external sensors Page 59
7.5.6 Test alarm Page 59
8. Setting of parameters
8.1 Change and save parameter values Page 60
8.2 Level „General cooling parameters“ c-parameter Page 62
8.3 Level „Extended cooling parameters“ P-parameter Page 64
8.4 Level „General cleaning parameters“ n-parameter Page 69
8.5 Level „Extended cleaning parameters“ r-parameter Page 72
8.6 Level „Service parameters“ E-parameter Page 77
8.7 Level „General tank monitor parameters“ h-parameter Page 78
8.8 Level „Extended tank monitor parameters“ H-parameter Page 80
8.9 Level „Alarm -> Event assignment“ F-parameter Page 82
8.10 Level „Hardware assignment“ A-parameter Page 84
8.11 Level „I-/O- test parameters“ o-parameter Page 90
9. Other information
9.1 Butterfly valve (manual or pneumatic) Page 92
9.2 Safety switch for manual butterfly valve Page 93
9.3 Robot control Page 94
9.3.1 Cleaning release by robot Page 95
9.4 Different variants for cooling start delay Page 96
9.5 Compressor switch-on delay / pre-agitating Page 98
9.6 Emergency cooling / sensor failure Page 98
9.7 Sensor correction procedure Page 98
9.8 Function second temperature sensor Page 99
9.9 Alarm level during cooling Page 98
9.10 Automatic / convenience functions Page 98
9.10.1 Autom. start to cont. agitating mode after exiting cooling mode Page 98
9.10.2 Automatic start to cooling mode after successful cleaning Page 98
9.11 Heating control Page 100
9.12 Function of pressure switch – Effect on pump and heater Page 100
9.13 Air in the cleaning pump -> automatic venting Page 101
9.14 Level control setting Page 102
9.15 Detergent injection position Page 103
9.16 Configuration of the different stages Page 103
9.17 Setting of a break in the cleaning programme Page 104
9.18 Page 104Function test alarm
9.19 Activation delay tank monitor Page 105
. Procedure following power failure9 20 Page 106
9.21 Power pack (optional) Page 106
9.22 Agitator monitoring module (optional) Page 107
9.23 Connection /Param. external analogue pressure sensor Page 108
9.24 Tank overflow protection Page 108
9.25 Tanks with various cooling levels Page 109
9.26 Anti-freezing protection by means of low pressure monitoring Page 109
9.27 General measures when using electronic control systems Page 110
Circuit diagram
is stored in the control box
105204 WTS-300 V2.0 - 11.01.2019 105204 WTS-300 V2.0 - 11.01.2019

Page 2 Page 3
Publisher:
WELBA GmbH
Electronic Control Engineering
Gewerbepark Siebenmorgen 6
D-53547 Breitscheid
Contents
+49 (0)2638 / 9320-0
+49 (0)2638 / 9320-20
[email protected]
www.welba.de
Contents
Tel:
Fax:
E-mail:
Internet:
1 Introduction
1.1 Information about this operating instructions Page 4
1.2 Limitation of liability Page 5
1.3 Device description Page 6
1.4 Type designation Page 6
1.5 Items supplied Page 7
1.6 Dimensions Page 7
1.7 Technical data Page 8
1.8 Sensor dimensions and technical data sensor Page 9
2 Safety
2.1 General Information Page 10
2.2 Intended use Page 12
2.3 Wiring, screening, earthing Page 13
2.4 Electrical safety Page 13
3 Installation
3.1 Location and climatic conditions Page 14
3.2 Unpacking and storage Page 14
3.3 Installation of housing Page 14
3.4 Fitting the sensor Page 15
4 Electrical connection
4.1 Safety during installation Page 16
4.2 Procedure Page 16
4.3 Wiring Page17
4.4 Connection diagram Page 18
4.5 Wiring the digital inputs Page 19
4.6 Connection robot Page 19
4.7 Connection of external pressure sensor (optional) Page 19
5 Operation
5.1 Function overview Page 20
5.2 The configuration software KONSOFT Page 23
5.3 Guideline for the initial installation / parameterization Page 24
5.4 Setting the date and time Page 26
5.5 Operation in levels Page 27
5.6 Operation of working level Page 28
5.6.1 Button functions Page 29
5.6.2 Meaning of the LEDs Page 30
5.6.3 Operation modes Page 32
6 Cleaning
6.1 Cleaning methods (cooling tank-configurations) Page 36
6.1.1 Circulation cleaning with a beaker Page 36
6.1.2 Circulation cleaning with two dosing pumps Page 36
6.1.3 Displacement cleaning with feed container, dosing pumps
in circulation line Page 37
6.1.4 Displacement cleaning with feed container and dosing pumps Page 37
6.2 Page 38Cleaning programme diagram
6.3 Explanation and programming of the cleaning process Page 39
6.3.1 Service functions for testing the cleaning cycle Page 46
7. Tank monitor and general fault handling
7.1 Description of tank monitor operation Page 48
7.2 Tank monitor: Milk removal YES or NO Page 50
7.3 Tank monitor: Handling multiple faults Page 53
7.4 Tank monitor: Display fault memory Page 53
7.5 Listing fault codes and their description Page 54
7.5.1 Critical tank monitor alarms (red) Page 54
7.5.2 Informative tank monitor alarms (green) Page 55
7.5.3 System alarms cleaning Page 56
7.5.4 System alarms cooling Page 58
7.5.5 System alarms external sensors Page 59
7.5.6 Test alarm Page 59
8. Setting of parameters
8.1 Change and save parameter values Page 60
8.2 Level „General cooling parameters“ c-parameter Page 62
8.3 Level „Extended cooling parameters“ P-parameter Page 64
8.4 Level „General cleaning parameters“ n-parameter Page 69
8.5 Level „Extended cleaning parameters“ r-parameter Page 72
8.6 Level „Service parameters“ E-parameter Page 77
8.7 Level „General tank monitor parameters“ h-parameter Page 78
8.8 Level „Extended tank monitor parameters“ H-parameter Page 80
8.9 Level „Alarm -> Event assignment“ F-parameter Page 82
8.10 Level „Hardware assignment“ A-parameter Page 84
8.11 Level „I-/O- test parameters“ o-parameter Page 90
9. Other information
9.1 Butterfly valve (manual or pneumatic) Page 92
9.2 Safety switch for manual butterfly valve Page 93
9.3 Robot control Page 94
9.3.1 Cleaning release by robot Page 95
9.4 Different variants for cooling start delay Page 96
9.5 Compressor switch-on delay / pre-agitating Page 98
9.6 Emergency cooling / sensor failure Page 98
9.7 Sensor correction procedure Page 98
9.8 Function second temperature sensor Page 99
9.9 Alarm level during cooling Page 98
9.10 Automatic / convenience functions Page 98
9.10.1 Autom. start to cont. agitating mode after exiting cooling mode Page 98
9.10.2 Automatic start to cooling mode after successful cleaning Page 98
9.11 Heating control Page 100
9.12 Function of pressure switch – Effect on pump and heater Page 100
9.13 Air in the cleaning pump -> automatic venting Page 101
9.14 Level control setting Page 102
9.15 Detergent injection position Page 103
9.16 Configuration of the different stages Page 103
9.17 Setting of a break in the cleaning programme Page 104
9.18 Page 104Function test alarm
9.19 Activation delay tank monitor Page 105
. Procedure following power failure9 20 Page 106
9.21 Power pack (optional) Page 106
9.22 Agitator monitoring module (optional) Page 107
9.23 Connection /Param. external analogue pressure sensor Page 108
9.24 Tank overflow protection Page 108
9.25 Tanks with various cooling levels Page 109
9.26 Anti-freezing protection by means of low pressure monitoring Page 109
9.27 General measures when using electronic control systems Page 110
Circuit diagram
is stored in the control box
105204 WTS-300 V2.0 - 11.01.2019 105204 WTS-300 V2.0 - 11.01.2019

Page 4 Page 5
1. Introduction
105204 WTS-300 V2.0 - 11.01.2019 105204 WTS-300 V2.0 - 11.01.2019
1. Introduction
These operating instructions include important technical and safety
information. It is vital to carefully study all these instructions before the
installation of the control or in case of any other work with the control!
These instructions have been prepared with the utmost care. However, the informa-
tion contained herein is not an assurance of product characteristics.
The manufacturer accepts no liability for errors and reserves the right to make techni-
cal changes at any time. All rights reserved.
1.1 Information about this operating instructions
These operating instructions are intended for the use by plant engineers, installers or
service technicians of the WTS-300 universal tank control. This manual contains all
necessary suggestions, Information, recommendations and advice for the safe and
proper installation and commissioning of the tank control. It is only with the knowledge
of this operating instruction that errors in the tank control system can be avoided and a
trouble-free operation is guaranteed.
Read the assembly instructions carefully and adhere to the recommendations de-
scribed in order to ensure proper operation. In addition, the local accident prevention
regulations and general safety regulations are to be observed for the field of applica-
tion of the tank control.
Operation instruction for the operator
The plant engineers, the installer or the service technician must prepare operating
instructions for the operator of the tank control (farmer). In this case the
parameterization of the delivery state must be clearly documented.
We recommend to only document those parameters which the operator of the tank
control needs.
When preparing the operating instructions for the operator the local regulations have
to be observed – see chapter “Safety”.
When delivered, the parameterization of the WTS-300 does not neces-
sarily correspond to the intended use. This must be adjusted accord-
ingly during the installation.
Basically, the installer of the system is responsible for the commission-
ing of the control.
The proper function of the WTS-300 depends on many external factors
on which the manufacturer has no influence. The manufacturer accepts
no liability for any damages on the milk cooling tank, the connected com-
ponents or the milk. The integrated tank monitor supports only the con-
trol of the milk quality and does neither absolve the farmer (as operator
of the milk tank) nor the driver of the milk collecting truck from the duty
of care. Both parties have to ensure that the milk is transportable before
it is removed from the tank.
1.2 Limitation of liability
NOTICE for storing the operating instructions
This instruction manual is part of the product and must always be readily available for
the service technician.
All information and instructions in this manual have been compiled taking into account
the applicable standards and regulations, the state of the art and our long-term experi-
ences.
WELBA GmbH does not assume any liability for damages due to:
!Non-observance of the installation instruction
!Improper use
!Installation by unqualified staff
!Non-professional installation by third parties
!Unauthorized modifications
!Technical modifications
!Use of unapproved spare parts (e.g. batteries)
Otherwise, our general terms and conditions as well as the terms of delivery of WELBA
GmbH and the legal regulations valid at the time of conclusion of the contract are ap-
plicable.
We reserve the right to make technical changes in the context of improving the proper-
ties of use and further developments,

Page 4 Page 5
1. Introduction
105204 WTS-300 V2.0 - 11.01.2019 105204 WTS-300 V2.0 - 11.01.2019
1. Introduction
These operating instructions include important technical and safety
information. It is vital to carefully study all these instructions before the
installation of the control or in case of any other work with the control!
These instructions have been prepared with the utmost care. However, the informa-
tion contained herein is not an assurance of product characteristics.
The manufacturer accepts no liability for errors and reserves the right to make techni-
cal changes at any time. All rights reserved.
1.1 Information about this operating instructions
These operating instructions are intended for the use by plant engineers, installers or
service technicians of the WTS-300 universal tank control. This manual contains all
necessary suggestions, Information, recommendations and advice for the safe and
proper installation and commissioning of the tank control. It is only with the knowledge
of this operating instruction that errors in the tank control system can be avoided and a
trouble-free operation is guaranteed.
Read the assembly instructions carefully and adhere to the recommendations de-
scribed in order to ensure proper operation. In addition, the local accident prevention
regulations and general safety regulations are to be observed for the field of applica-
tion of the tank control.
Operation instruction for the operator
The plant engineers, the installer or the service technician must prepare operating
instructions for the operator of the tank control (farmer). In this case the
parameterization of the delivery state must be clearly documented.
We recommend to only document those parameters which the operator of the tank
control needs.
When preparing the operating instructions for the operator the local regulations have
to be observed – see chapter “Safety”.
When delivered, the parameterization of the WTS-300 does not neces-
sarily correspond to the intended use. This must be adjusted accord-
ingly during the installation.
Basically, the installer of the system is responsible for the commission-
ing of the control.
The proper function of the WTS-300 depends on many external factors
on which the manufacturer has no influence. The manufacturer accepts
no liability for any damages on the milk cooling tank, the connected com-
ponents or the milk. The integrated tank monitor supports only the con-
trol of the milk quality and does neither absolve the farmer (as operator
of the milk tank) nor the driver of the milk collecting truck from the duty
of care. Both parties have to ensure that the milk is transportable before
it is removed from the tank.
1.2 Limitation of liability
NOTICE for storing the operating instructions
This instruction manual is part of the product and must always be readily available for
the service technician.
All information and instructions in this manual have been compiled taking into account
the applicable standards and regulations, the state of the art and our long-term experi-
ences.
WELBA GmbH does not assume any liability for damages due to:
!Non-observance of the installation instruction
!Improper use
!Installation by unqualified staff
!Non-professional installation by third parties
!Unauthorized modifications
!Technical modifications
!Use of unapproved spare parts (e.g. batteries)
Otherwise, our general terms and conditions as well as the terms of delivery of WELBA
GmbH and the legal regulations valid at the time of conclusion of the contract are ap-
plicable.
We reserve the right to make technical changes in the context of improving the proper-
ties of use and further developments,

Page 6 Page 7
The type designation of your controller is attached to the holder frame.
1.5 Items supplied
1. Introduction
105204 WTS-300 V2.0 - 11.01.2019 105204 WTS-300 V2.0 - 11.01.2019
The WTS-300 is an universal tank control unit that combines various
basic functions in one unit
,a milk cooling thermostat
,an extensive cleaning control
,an extended robot interface
,an extended tank monitoring system
All functions can be parameterised separately and universally.
The control unit has various operating modes:
,OFF mode (tank is empty)
,Cooling mode
,Continuous stirring mode
,Cleaning mode
WELBA KONSOFT
The free of charge configuration Software KONSOFT provides a
simple parameterization and updating of the WTS-300 as well as a
comfortable evaluation of the determined data.
See section 5.2
NOTE: The KONSOFT PC-Software has been thoroughly tested and has proven itself hundreds of times in customer
use. Despite all care, we point out that the use of the free PC-Software is at your own risk. WELBA does not accept any
liability for damages or loss of data resulting from the installation or use of the Software.
1.3 Device description
1.4 Type designation
!Controller WTS-300
!Holder
!Rubber seal
!Sensor
!Fixing screws
177
106
45
1. Introduction
1.6 Dimensions
These operating instructions contain important technical and safety
information. Please read carefully before installation and before any
work on or with the regulator.
These instructions have been compiled with maximum care and attention. However,
their content does not constitute an assurance of product features.
The manufacturer cannot be held liable for errors and may at any time make changes
serving technical progress. All rights reserved.
°C
RESET
Robot
STOP
Mode
Valve open
Robot Stop
T1
T2

Page 6 Page 7
The type designation of your controller is attached to the holder frame.
1.5 Items supplied
1. Introduction
105204 WTS-300 V2.0 - 11.01.2019 105204 WTS-300 V2.0 - 11.01.2019
The WTS-300 is an universal tank control unit that combines various
basic functions in one unit
,a milk cooling thermostat
,an extensive cleaning control
,an extended robot interface
,an extended tank monitoring system
All functions can be parameterised separately and universally.
The control unit has various operating modes:
,OFF mode (tank is empty)
,Cooling mode
,Continuous stirring mode
,Cleaning mode
WELBA KONSOFT
The free of charge configuration Software KONSOFT provides a
simple parameterization and updating of the WTS-300 as well as a
comfortable evaluation of the determined data.
See section 5.2
NOTE: The KONSOFT PC-Software has been thoroughly tested and has proven itself hundreds of times in customer
use. Despite all care, we point out that the use of the free PC-Software is at your own risk. WELBA does not accept any
liability for damages or loss of data resulting from the installation or use of the Software.
1.3 Device description
1.4 Type designation
!Controller WTS-300
!Holder
!Rubber seal
!Sensor
!Fixing screws
177
106
45
1. Introduction
1.6 Dimensions
These operating instructions contain important technical and safety
information. Please read carefully before installation and before any
work on or with the regulator.
These instructions have been compiled with maximum care and attention. However,
their content does not constitute an assurance of product features.
The manufacturer cannot be held liable for errors and may at any time make changes
serving technical progress. All rights reserved.
°C
RESET
Robot
STOP
Mode
Valve open
Robot Stop
T1
T2

Page 8 Page 9
Sensors other than our standard type are available on request
(different bush form or cable length).
Some of the options are shown here.
1.7 Technical data of control unit
Operating voltage 230V AC +/-10%, 50/60 Hz
Relay contact 12 performance relays
max. switching current 6 x each 6A AC1 - 250V AC
4 x each 10A AC1 - 250V AC
2 x each 12A AC1 - 250V AC
max. current per terminal 12A - 250V AC
max. switching voltage 250V AC - 50..60 Hz
Display 13 mm LED-Display, 4 digits
Display range -999 ... 9999
LED switching status displays 3 mm
Number of sensor inputs 1 or 2
Measurement range -5° ... +95°C
Temperature resolution 0.1°C
Sensor input KTY 81-210 (optionally PT-100)
Control mode two-step controller
Hysteresis* 0.1 K .. 99,9 K (standard adjusting 0.7 K)
Water detection via 2 independent level monitors
Target temperature T1* standard adjusting 8°C
Target temperature T2* standard adjusting 4°C
Digital inputs 8 (via optocoupler)
Interface 2x RS 485
Connection Plug-in screw connections
for cables up to 2.5 mm²
Housing
- Front dimension 177 x 106 mm
- Front panel cut out 157 x 97 mm
- Insertion depth 45 mm
Protection The control is open on the rear, as it is designed for
installation in a closed housing
- Housing front IP 64
- Rear IP 20
Electrical safety Protection class II,
Overvoltage category III, pollution degree I
Environment specifications:
- Operation temperature 0° .. +50°C
- Storage temperature -20° .. +70°C
- max. humidity 75% (no dew)
Technical data subject to change
KTY sensor
1.4301 (V2A)
40 mm
6.0 mm +/- 0.1
PVC
-10 .. 70° C
standard 2 metres
IP 65
40 mm
6,0 mm
6,1 mm
105204 WTS-300 V2.0 - 11.01.2019 105204 WTS-300 V2.0 - 11.01.2019
1. Introduction 1. Introduction
Sensor element
Bush material
Bush length
Bush diameter
Cable material
Measurement range
Cable length
Protection type
1.8 Sensor dimensions and technical data
Order no. TF1A-2

Page 8 Page 9
Sensors other than our standard type are available on request
(different bush form or cable length).
Some of the options are shown here.
1.7 Technical data of control unit
Operating voltage 230V AC +/-10%, 50/60 Hz
Relay contact 12 performance relays
max. switching current 6 x each 6A AC1 - 250V AC
4 x each 10A AC1 - 250V AC
2 x each 12A AC1 - 250V AC
max. current per terminal 12A - 250V AC
max. switching voltage 250V AC - 50..60 Hz
Display 13 mm LED-Display, 4 digits
Display range -999 ... 9999
LED switching status displays 3 mm
Number of sensor inputs 1 or 2
Measurement range -5° ... +95°C
Temperature resolution 0.1°C
Sensor input KTY 81-210 (optionally PT-100)
Control mode two-step controller
Hysteresis* 0.1 K .. 99,9 K (standard adjusting 0.7 K)
Water detection via 2 independent level monitors
Target temperature T1* standard adjusting 8°C
Target temperature T2* standard adjusting 4°C
Digital inputs 8 (via optocoupler)
Interface 2x RS 485
Connection Plug-in screw connections
for cables up to 2.5 mm²
Housing
- Front dimension 177 x 106 mm
- Front panel cut out 157 x 97 mm
- Insertion depth 45 mm
Protection The control is open on the rear, as it is designed for
installation in a closed housing
- Housing front IP 64
- Rear IP 20
Electrical safety Protection class II,
Overvoltage category III, pollution degree I
Environment specifications:
- Operation temperature 0° .. +50°C
- Storage temperature -20° .. +70°C
- max. humidity 75% (no dew)
Technical data subject to change
KTY sensor
1.4301 (V2A)
40 mm
6.0 mm +/- 0.1
PVC
-10 .. 70° C
standard 2 metres
IP 65
40 mm
6,0 mm
6,1 mm
105204 WTS-300 V2.0 - 11.01.2019 105204 WTS-300 V2.0 - 11.01.2019
1. Introduction 1. Introduction
Sensor element
Bush material
Bush length
Bush diameter
Cable material
Measurement range
Cable length
Protection type
1.8 Sensor dimensions and technical data
Order no. TF1A-2

Page 10 Page 11
The parameter settings of the WTS-300 as supplied do not correspond
to the intended use. This can lead to undefined behaviour by individual
components when the system is commissioned.
For this reason, no actuators should be connected when starting opera-
tion. Load circuits should be separated.
The general principle is that the plant constructor is responsible for putt-
ing the controller into operation.
The plant engineering company, the installer or the service engineer
must prepare operating instructions for the operator, taking account of
the controller's parameters as supplied.
We recommend referring only to the parameters which the end user
needs for safe operation.
In preparing the operating instructions for the end user, especially the
chapter on “Safety”, account must be taken of local regulations.
2.1 General Information
2. Safety
105204 WTS-300 V2.0 - 11.01.2019 105204 WTS-300 V2.0 - 11.01.2019
2. Safety
These operating instructions contain important technical and safety
information. Please read carefully before installation and before any
work on or with the regulator.
It is the duty of the party commissioning the system to ensure compli-
ance with the following guidelines.
The universal tank controller may only be installed by an authorised spe-
cialist, observing all local safety requirements.
Access to the environment when connected must be restricted to spe-
cialised personnel.
Universal tank controllers contain live components. They must be built
into the plant in such a way that contact with such live components is
impossible.
The controller is not suitable for use in explosive atmospheres. Danger
of explosion. Use only outside areas subject to explosive atmospheres.
The device must not be used if the housing or connection terminals are
damaged.
No fluids must penetrate the housing.
The universal tank control may not be exported to the USA without the
manufacturer's express permission.
IMPORTANT NOTICE ABOUT THE ACCUMULATORS (only if installed)
The life of the accumulators is limited. The built-in accumulators must
be replaced by new ones every two years at the latest.
Only (!) charged accumulators of the following specification may be
used: 1.2 V NiMh - size AA (min. 2.000 mAh)
DO NOT USE BATTERIES !!! EXPLOSIVE !!!
IMPORTANT NOTICE ON LIABILITY
The faultless function of the WTS-300 depends on many external fac-
tors, which the manufacturer has no influence on. The manufacturer
assumes no liability for damage to the milk cooling tank, the connected
components or the milk. The integrated tank monitor thus only supports
the milk quality and does not release the farmer (as operator of the milk
cooling tank) or the driver of the milk collecting truck from the duty of
care. These must ensure, before withdrawing from the tank, that the milk
is transportable.