Analyze Detect Measure Control TM

Instruction Manual

Circulator HAAKE Circulator HAAKE

C1, DC1, DC3, DL3, DC5 C1, DC1, DC3, DL3, DC5

including all Baths including all Baths
Table of Contents

1

1. Key to Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.1 Symbols used in this manual 4 . . . . . . . . . . . . . . . . . . 

1.2 Symbols used on the unit 4 . . . . . . . . . . . . . . . . . . . . . 

2. Quality Assurance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3. Your Contacts at HAAKE . . . . . . . . . . . . . . . . . . . . . . . 5

4. Safety Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

5. Unit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5.1 Safety features 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

5.2 Safety classes according to DIN 12879 9 . . . . . . . . . 

5.3 Applications 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

5.4 Temperature ranges 10 . . . . . . . . . . . . . . . . . . . . . . . . . . 

5.5 Unit combinations 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

6. Unpacking / Setting Up . . . . . . . . . . . . . . . . . . . . . . . . . 11

6.1 Transportation damage? 11 . . . . . . . . . . . . . . . . . . . . . . 

6.2 Information concerning the CE sign 11 . . . . . . . . . . . . 

6.3 Ambient conditions according to DIN EN 61010 12 . 

6.4 Resting time after transportation

(only for refrigerated circulators) 12 . . . . . . . . . . . . . . . 

6.5 Ventilation 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

7. Functional and Operating Elements . . . . . . . . . . . . 13

7.1 Temperature control module C1 13 . . . . . . . . . . . . . . . . 

7.2 Temperature control module DC1 14 . . . . . . . . . . . . . . 

7.3 Temperature control modules DC3 and DC5 15 . . . . . 

7.4 Bath vessel “W” (example model) and “B3” 16 . . . . . . 

7.5 Bath vessel “V” 17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

7.6 Bath vessel K15 18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

7.7 Bath vessel K20 19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

8. Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

8.1 Immersion circulators with bracket mounting 23 . . . . . 

8.2 Open-bath circulators with angled mountings 24 . . . . 

8.3 Open-bath circulators with bath bridge and

stainless steel or polyacrylic baths 25 . . . . . . . . . . . . . . 

8.4 Open-bath and heating circulators with bath

bridge H33 and polyacrylic bath 26 . . . . . . . . . . . . . . . . 

8.5 Heating circulators with bath vessel B3

Refrigerated circulators with

cooling bath K15 or K20 27 . . . . . . . . . . . . . . . . . . . . . . 

8.6 Subsequently fitting a cooling coil 28 . . . . . . . . . . . . . . 

8.7 Fitting a lifting platform to the bridge 29 . . . . . . . . . . . . 

8.7.1 Lifting platforms 333-0217 and 333-0227 29 . . . 
Table of Contents

2

9. Connecting Hoses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

9.1 Plastic hoses 30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

9.2 HAAKE metal hoses 31 . . . . . . . . . . . . . . . . . . . . . . . . . . 

9.3 Tap water cooling 32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

9.3.1 Connection to cooling water 32 . . . . . . . . . . . . . . 

9.4 External Cooling Devices 32 . . . . . . . . . . . . . . . . . . . . . 

9.5 Pressure pump 33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

9.5.1 Temperature controlling an object in the

internal bath 33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

9.5.2 Connection of external closed systems 33 . . . . 

10. Filling with Bath Liquid . . . . . . . . . . . . . . . . . . . . . . . . . 34

10.1 Recommended bath liquids 34 . . . . . . . . . . . . . . . . . . . . 

10.2 Filling with heat transfer liquid 36 . . . . . . . . . . . . . . . . . 

11. Draining . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

12. Connecting Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

12.1 Connecting to the mains 38 . . . . . . . . . . . . . . . . . . . . . . 

12.1.1 Only for refrigerated baths K15, K20 and V 38 . 

12.2 Checking the liquid circuit 38 . . . . . . . . . . . . . . . . . . . . . 

12.3 Changing the mains plug 38 . . . . . . . . . . . . . . . . . . . . . . 

12.4 Fuses on the unit 39 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

13. Operating the C1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

13.1 Switching on 40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

13.2 Setting the desired temperature 40 . . . . . . . . . . . . . . . . 

13.3 Heating control lamp 40 . . . . . . . . . . . . . . . . . . . . . . . . . 

13.4 Displaying the actual temperature 40 . . . . . . . . . . . . . . 

13.5 Excess temperature protection 40 . . . . . . . . . . . . . . . . . 

14. Operating the DC1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

14.1 Switching on 41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

14.2 Setting the desired temperature 41 . . . . . . . . . . . . . . . . 

14.3 Heating control lamp 42 . . . . . . . . . . . . . . . . . . . . . . . . . 

14.4 Displaying the actual temperature 42 . . . . . . . . . . . . . . 

14.5 Excess temperature protection 43 . . . . . . . . . . . . . . . . . 

15. Operating the DC3, DL3 and DC5 . . . . . . . . . . . . . . . 44

15.1 Switching on 44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

15.2 Starting up again after a power failure 44 . . . . . . . . . . 

15.3 Displaying the software version 45 . . . . . . . . . . . . . . . . 

15.4 Setting the set temperature 45 . . . . . . . . . . . . . . . . . . . . 

15.5 Heating control lamp 46 . . . . . . . . . . . . . . . . . . . . . . . . . 

15.6 Displaying the actual temperature 46 . . . . . . . . . . . . . . 

15.7 Temperature limitation 48 . . . . . . . . . . . . . . . . . . . . . . . . 
Table of Contents

3

15.7.1 Subsequently altering the temperature

limitation 48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

15.8 RS232C Interface 49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

15.9 The display cannot be altered 49 . . . . . . . . . . . . . . . . . 

16. Excess Temperature Protection . . . . . . . . . . . . . . . . 50

16.1 Excess temperature protection dial 50 . . . . . . . . . . . . . 

16.1.1 Setting the excess temperature 51 . . . . . . . . . . 

16.1.2 Testing the cut-off point 51 . . . . . . . . . . . . . . . . . 

17. Fault Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

17.1 C1 and DC1 52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

17.1.1 Excess temperature or low liquid level 52 . . . . 

17.1.2 Motor or pump overloading 52 . . . . . . . . . . . . . . 

17.2 DC3, DL3 and DC5 53 . . . . . . . . . . . . . . . . . . . . . . . . . . . 

17.2.1 Excess temperature 53 . . . . . . . . . . . . . . . . . . . . 

17.2.2 Low liquid level 53 . . . . . . . . . . . . . . . . . . . . . . . . 

17.2.3 Pump or motor overloading 53 . . . . . . . . . . . . . 

17.2.4 Sensor breakage or short circuit 54 . . . . . . . . . 

17.2.5 Undefined fault 54 . . . . . . . . . . . . . . . . . . . . . . . . 

17.2.6 Range exceeded 54 . . . . . . . . . . . . . . . . . . . . . . 

17.2.7 Parity fault 54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

17.2.8 External fault 54 . . . . . . . . . . . . . . . . . . . . . . . . . . 

17.2.9 Fault eliminated? 54 . . . . . . . . . . . . . . . . . . . . . . 

18. Testing the Safety Features . . . . . . . . . . . . . . . . . . . . 55

18.1 Excess temperature protection 55 . . . . . . . . . . . . . . . . . 

18.2 Low liquid level protection

(for the DC3, DL3 and DC5) 55 . . . . . . . . . . . . . . . . . . . 

19. RS232C Interface for DC5 . . . . . . . . . . . . . . . . . . . . . . 56

19.1 Connecting the DC5 to a computer 56 . . . . . . . . . . . . . 

19.2 Interface parameters 57 . . . . . . . . . . . . . . . . . . . . . . . . . 

19.3 Requirements made of external units 58 . . . . . . . . . . . 

19.4 Setting the desired set value 58 . . . . . . . . . . . . . . . . . 

19.5 Correction value 58 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

19.6 Commands for DC5 circulators 59 . . . . . . . . . . . . . . . . 

19.7 DC5 keys 60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

19.8 Operating status 60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

19.9 Example of a BASIC program 61 . . . . . . . . . . . . . . . . . . 

20. Cooling (only for K15, K20 or V) . . . . . . . . . . . . . . . . 62

21. Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

21.1 Cleaning the fins of the liquefier 63 . . . . . . . . . . . . . . . . 

21.2 Discarding the unit: 63 . . . . . . . . . . . . . . . . . . . . . . . . . . . 

22. Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . 64

22.1 Dimensions, material and the permissible

temperature ranges of the baths 64 . . . . . . . . . . . . . . . 

22.2 Technical specifications of the refrigerated baths 64 . 

22.3 Technical specifications of the temperature

control modules acc. to DIN 58966 65 . . . . . . . . . . . . . 

22.4 Fuse values 66 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
!

Key to Symbols

4

1. Key to Symbols

1.1 Symbols used in this manual

Warns the user of possible damage to the unit, draws

attention to the risk of injury or contains safety notes

and warnings.

Denotes an important remark.

1 Indicates the next operating step to be carried out

and...

⇒ ...what happens as a result thereof.

1.2 Symbols used on the unit

Caution: Read the instruction manual!

Heating display light

on = the unit is heating; off = the unit is not heating

Temperature fine adjustment

Fault display light

on = the unit has a fault; off = the unit works properly

Adjustment possibility for setting the cut-off point for

excess temperature protection

Menu selection

Value alteration (↑) higher / (↓) lower

Enter key

Reset button (for usage after a fault or interruption)
Quality Assurance / Your Contacts at HAAKE

5

2. Quality Assurance

Dear customer,

HAAKE implements a Quality Management System certified

according to EN 29001.

This guarantees the presence of organizational structures

which are necessary to ensure that our products are developed, manufactured and managed according to our customers expectations. Internal and external audits are carried out

on a regular basis to ensure that our QMS system is fully

functional.

We also check our products during the manufacturing process to certify that they are produced according to the specifications as well as to monitor correct functioning and to confirm that they are safe. This is why we initiate this monitoring

process of important characteristics already during

manufacturing and record the results for future reference.

The “Final Test” label on the product is a sign that this unit

has fulfilled all requirements at the time of final manufacturing.

Please inform us if, despite our precautionary measures,

you should find any product defects. You can thus help us to

avoid such faults in future.

3. Your Contacts at HAAKE

Please get in contact with us or the authorized agent who

supplied you with the unit if you have any further questions.

Gebrüder HAAKE GmbH,

Dieselstrasse 4,

D-76227 Karlsruhe

GERMANY

Tel. +49 (0)18050HAAKE

or +49 (0)721 4094-444

Fax +49 (0)721 4094-418

E-mail haake_helpdesk@bigfoot.com

The following specifications should be given when product

enquiries are made:

– Unit name printed on the front of the unit,

– TYP as specified on the name plate.
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Safety Notes

6

4. Safety Notes

These notes are intended to draw your attention to risks

which only YOU can recognize and avoid or overcome. They

are intended to enhance your own safety consciousness.

We have set the highest quality standards for ourselves and

this unit during development and production. Every unit

meets relevant safety regulations. The correct unit usage

and proper handling is however solely your responsibility.

The intended workplace should correspond to a laboratory

or pilot plant environment. The user should have an education level which is at least equivalent to a trained laboratory

worker or specialized chemist. The following list should be

seen as an example.

The device may not be operated if there are any doubts

regarding a safe operation due to the outer appearance

(e.g. damages).

A safe operation of the instrument cannot be guaranteed if the user does not comply with this instruction

manual.

Ensure that this manual is always at hand for every unit

operator.

Only use this unit solely for the intended application.

Repairs, alterations or modifications must only be carried out by specialist personnel. Considerable damage

can be caused by improper repairs. The HAAKE service

department is at your disposal for repair work.

Do not operate the unit with wet or oily hands.

Do not expose the unit to spray water or immerse it in

water.

Do not clean the unit with solvents (fire risk!), a wet cloth

soaked in household detergent is normally sufficient.

This device is not designed according to the standard

EN 60601-1: 1990 (DIN VDE 0750-1 and IEC 601-1) and

should not be operated in rooms used for medical purposes and/or in the vicinity of patients.

Many units parts can become hot as a result of normal

unit functioning – there is a high risk of burns!

The overall temperature of the marked zone (see fig.)

will become higher than 70°C when the bath temperature exceeds approx. 150°C. Please ensure that adequate contact protection is provided.

Do not move the unit from the position where it was set

up during operation or when it is still hot. There is a high

risk of burns!

Only use heat transfer liquids recommended by HAAKE.

Please refer to the respective EC Safety Data Sheet.
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Safety Notes

7

The temperature controlling i.e. immersing of test tubes,

Erlenmeyer flasks or similar objects directly within the

circulator constitutes normal circulator practise.

We do not know which substances are contained within

these vessels. Many substances are dangerous:

 • inflammable, easily ignited or explosive

 • hazardous to health

 • environmentally unsafe

You alone are responsible for the handling of these substances! Our advice:

 • If in doubt, consult a safety specialist.

 • Read the product manufacturer’s or supplier’s EC

Safety Data Sheet according to directive 91/155/EEC.

 • Read relevant regulations concerning dangerous

materials.

 • Observe relevant guidelines for laboratories in your

country.

The following measures were taken for the protection of

the operator:

 • Protection Class I according to VDE 0106 T1

i.e. protection against electric shocks by grounding all

parts which carry the risk of electric contact.

The device must only be connected to mains receptacles with a protective ground.

 • Protection IP 20 according to EN 60529

i. e. regarding the protection against accidently touching live parts and damage by foreign matter, it has been

ensured that foreign bodies with a thickness or diameter of more than 12 mm cannot penetrate.

No special precautions were taken against the penetration of water and dust. The device should therefore not be used in a dusty atmosphere or in the neighborhood of spray water.

Do not insert wires or tools in any of the openings.

Complete separation from the mains is required

when:

 • all dangers caused by this device are to be

avoided,

 • cleaning is carried out,

 • repairs or maintenance by specialist personnel is

about to be carried out

Complete separation means:

Pull out the mains plug!
Unit Description

8

5. Unit Description

All units fulfill the requirements of safety classes 1W or 2 according to DIN 12879 and are thus suitable for unsupervised

continuous operation.

The circulator pump motor is protected against thermal overloading.

5.1 Safety features

The comprehensive safety system is designed on the principle of the concept of the “single fault” (EN 61010). This assumes that two separate faults do not occur simultaneously.

This system therefore offers protection against one (single)

fault. This one fault will effectively occur automatically if

you...

 • do not read this manual,

 • do not correctly set the excess temperature protection,

i.e. your safety reserves have already been used up.

Such faults can include e.g.:

Fault in the temperature control unit:

⇒ Excess temperature ⇒ poss. fire danger

Leakage in the liquid circuit or

Evaporation of heat transfer liquid:

⇒ Low liquid level ⇒ poss. fire danger,

destruction of

polyacrylic bath vessel

Pump blocked or

Heat transfer liquid is too highly viscous:

⇒ Motor overheating ⇒ poss. fire danger

Or also:

Excess temperature protection level not correctly set:

⇒ poss. fire danger
!

Unit Description

9

5.2 Safety classes according to DIN 12879

Safety class 1W:

The unit can only be used with non-flammable liquids

such as water or water + antifreeze.

The safety element measures the surface temperature

of the heating element. If this exceeds a certain temperature (due to e.g. a leakage in the liquid circuit or a

liquid shortage), the safety element is triggered.

The HAAKE C1 and DC1 circulators exceed this standard and also offer the possibility of setting this cut-off

temperature variably.

Safety class 2:

A variably adjustable excess temperature protection

and independent low liquid level protection which is

preset to the lowest level allow the usage of different

heat transfer liquids.

These safety features are incorporated within the

HAAKE circulators DC3, DL3 and DC5.

If a safety feature is triggered...

 • fault display lights (for the C1 and DC1) or the Fault

Identification System (FIS) and an acoustic signal (for

the DC3, DL3 and DC5) indicate the fault,

 • the safety-relevant components of the heating unit

(heating element and motor) are switched off immediately i.e. the safety circuit transfers the unit to a stable,

safe condition,

 • the heat transfer liquid in the heating unit gradually adjusts to ambient temperature, but...

For units with switched on compressor

cooling, this cooling remains functional

and thus cools the heat transfer liquid to the

lowest reachable temperature.
!

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Unit Description

10

5.3 Applications

Open-bath circulators:

For temperature controlling samples within the circulator’s own bath.

Heating and refrigerated circulators:

For temperature controlling closed temperature control

circuits such reactors, heat exchangers or similar objects.

Separate open vessels cannot be temperature controlled as these circulators are only equipped with a

pressure pump.

5.4 Temperature ranges

Working temperature range:

The temperature range of the circulator without additional heating or cooling sources.

Operating temperature range:

The temperature range of the circulator which can be

reached if additional heating or cooling sources are

used.

Tap water can be used as a cooling source. In this case

the minimum working temperature possible is approx.

3°C above that of the tap water temperature.

High operating temperatures mean the unit surfaces heat up. Protective measures must be taken!

Mains cable:

The mains cables used for the temperature control

modules DC3, DL3 and DC5 are specially designed for

usage with heating elements. They can be allowed to

come into contact with parts which are heated up to a

temperature of max. 250°C.

Warning for maintenance personnel: Please ensure that the same sort of cable is used in case of

replacement!

(HAAKE order no. 082-2409)

5.5 Unit combinations

A complete, ready-to-use circulator always consists of a

temperature control module (C1, DC1, DC3, DL3 or DC5),

a bath vessel (B3, K15, K20, W13, etc.) and a connecting

element which attaches the temperature control module to

or on the bath.
Unpacking / Setting Up

11

6. Unpacking / Setting Up

6.1 Transportation damage?

 • Notify carrier (forwarding merchant, railroad) etc.

 • Compile a damage report.

Before return delivery:

 • Inform dealer or manufacturer

(Small problems can often be dealt with on the spot).

6.2 Information concerning the CE sign

HAAKE circulators and cryostats carry the CE sign which confirms that they are compatible with the EU guideline

89/336/EEC (electromagnetic compatibility). The tests are

carried out according to module H (official sheet L380 of the

European Community) as our quality assurance system is

certified according to DIN / ISO 9001.

The specialist basic standards to be applied are EN 50081-2

for interference emission and EN 50082-2 for interference

resistance. The following tests were carried out:

for according to

EN 50081 EN 55011 class B (interference voltage)

EN 55011 class B (interference radiation)

EN 50082 EN 61000-4-2 (discharging static electricity)

ENV 50140 (electromagnetic HF field,

(amplitude modulated)

EN 61000-4-4 (quick transient interference

(variable) 

ENV 50141 (high-frequency asymmetrical,

(amplitude modulated)

EN 61000-4-8 (magnetic field with power-

(engineered frequency)

There are thus no limitations placed on usage. A declaration

of conformity can be supplied with the ordered unit on

request.

Our strict standards regarding minimum operating quality and

the resulting considerable amount of time and money spent

on development and testing reflect our commitment to guarantee the high level of quality of our products even under

extreme electromagnetic conditions. Practice however also

shows that even units which carry the CE sign such as monitors or analytical instruments can be affected if their manufacturers accept an interference (e.g. the flimmering of a monitor)

as the minimum operating quality under electromagnetic

compatibility conditions. For this reason we recommend you

to observe a minimum distance of approx. 1 m from such units.

The CE-sign also certifies the conformity with the EU-directive 72/23/EWG (low voltage regulation). The applied standards are EN61010-1 and EN61010-2-010.
! HAAKE K20

26 !

Unpacking / Setting Up

12

6.3 Ambient conditions according to DIN EN 61010

 • indoors, max. 2000 meters above sea level,

 • ambient temperature 5 ... 40° C,

 • relative humidity max. 80%/31°C (→ 50%/40°C)

 • excess voltage category II, contamination level 2

6.4 Resting time after transportation

(only for refrigerated circulators)

As we can unfortunately not guarantee that our refrigerated

circulators are always transported according to our recommendations (i.e. upright), lubrication oil can leak from the

compressor into the cooling circuit.

If the refrigerated circulator is started up whilst still in this

state, the compressor may be damaged to the lack of oil.

Therefore:

Rest the unit for 24 hours after setting up.

6.5 Ventilation

Keep all ventilation grids 26 free from obstruction to ensure unhindered air circulation.

Blocked ventilation grids lead to increased unit

heating which in turn reduces the cooling capacity

and thus impairs correct functioning.
Functional and Operating Elements

13

7. Functional and Operating Elements

7.1 Temperature control module C1

1

4

9

max.

min.

2

11

12

14

10

16

17

19

18

13

20

Liquid

level

A

A Symbol: Read the instruction manual!

1 Mains switch

2 Reset button (outer ring of setting button)

4 Heating control display

9 Mounting screw for circulation set

10 Pump outlet

11 Mains cable

12 Fuses (if this fuse is triggered, see chap. 12.4)

13 Excess temperature setting dial

14 Air inlet opening

16 Fault display

17 Mains display LED

18 Temperature setting dial

19 Temperature fine-adjustment

20 Mounting screw for thermometer clamp (on both sides)
Functional and Operating Elements

14

7.2 Temperature control module DC1

1

6

3

4

7

8

9

5

max.

min.

2

16

10

12

13

11

14

Liquid

level

A

A Symbol: Read the instruction manual!

1 Mains switch

2 Reset button (outer ring of setting button)

3 Menu selection key

4 Heating control display

5 Menu position display

6 Set or actual temperature display

7 Value alteration (↑) higher / (↓) lower

8 Enter key

9 Mounting screw for circulation set

10 Pump outlet

11 Mains cable

12 Fuses (if this fuse is triggered, see chap. 12.4)

13 Excess temperature setting dial

14 Air inlet opening

16 Fault display
Functional and Operating Elements

15

7.3 Temperature control modules DC3 and DC5

(externally identical; DC5 with additional RS232C

interface). Temperature control module DL3

(extended version of the DC3 with deeper immersion

depth)

1

6

2

3

4

7

8

9

5

max.

min.

10

11

14

13

12

15

Liquid

level

min. 9

10

DL3

A

A Symbol: Read the instruction manual!

1 Mains switch

2 Reset button (also Start key)

3 Menu selection key

4 Heating control display

5 Menu position display

6 Set or actual temperature display /

fault display

7 Value alteration (↑) higher / (↓) lower

8 Enter key

9 Mounting screw for circulation set

10 Pump outlet

11 Mains cable

12 Fuses (if this fuse is triggered, see chap. 12.4)

13 Excess temperature setting dial

14 Air inlet opening

15 RS232C interface (only DC5)
Functional and Operating Elements

16

7.4 Bath vessel “W” (example model) and “B3”

22

23

21

24

25

HAAKE W13 HAAKE B3

21 Mounting screws for angled holder

or bath bridge

22 Handle

23 Drainage nozzle

24 Opening for temperature control module

with intermediate plate

25 Bath opening (with plastic bath covering

as a standard feature)
Functional and Operating Elements

17

7.5 Bath vessel “V”

21

22

23

HAAKE V

29 28 27

26

30

! ACHTUNG 10 A max

A

A Symbol: Read the instruction manual!

21 Mounting screws for angled holder

or bath bridge

22 Handle

23 Drainage nozzle

26 Ventilation grid

27 Cooling unit mains switch

28 Mains socket for temperature control unit

29 Fuses (if this fuse is triggered, see chap. 12.4)

30 Mains cable
Functional and Operating Elements

18

7.6 Bath vessel K15

HAAKE K15

25

24

29 28

30

23

27

26

! ACHTUNG 10 A max

A

A Symbol: Read the instruction manual!

23 Drainage nozzle

24 Opening for temperature control module

with intermediate plate

25 Bath opening (with plastic bath covering

as a standard feature)

26 Ventilation grid (removeable, four mounting points: )

27 Cooling unit mains switch

28 Mains socket for temperature control unit

29 Fuses (if this fuse is triggered, see chap. 12.4)

30 Mains cable
Functional and Operating Elements

19

7.7 Bath vessel K20

HAAKE K20

25

24

27

29 28

30

23

22

26

! ACHTUNG 10 A max

A

A Symbol: Read the instruction manual!

22 Handle

23 Drainage nozzle

24 Opening for temperature control module

with intermediate plate

25 Bath opening (with plastic bath covering

as a standard feature)

26 Ventilation grid (removeable, four mounting points: )

27 Cooling unit mains switch

28 Mains socket for temperature control unit

29 Fuses (if this fuse is triggered, see chap. 12.4)

30 Mains cable
Assembly

20

8. Assembly

The complete program is based on individual modular components which have all been separately tested to the highest

standards. In order to guarantee a high degree of availability,

the components are kept on stock as separate units by us,

our dealers and representatives, and grouped together just

prior to shipment to our customers according to their order.

These units are packed individually in order to ensure safety

during transport. Therefore there are a few simple assembly

steps left to be carried out by the customer.

You require:

1 screwdriver – size no. 2 (for Phillips screws)

Follow the following steps:

You can find the correct page for the instructions for your respective unit in the table on the following page.
Assembly

21

Assembly for all temperature control units C1, DC1, DC3,

DL3 and DC5 is for the most part identical.

As an immersion circulator with bracket mounting

 see page 23

As an open-bath circulator with angled mounting

 see page 24

As an open-bath circulator with bath bridge

 see page 25

As a combined open-bath and heating circulator with

bath bridge H33 and polyacrylic bath W5P

see page 26

As a heating circulator with bath vessel B3

see page 27

As a refrigerated circulator with bath vessel K15 or K20

see page 27

A model-orientated table of contents can be found on the

next page.
Assembly

22

C1 Immersion circulator C1 . . . . . . . . . . . . . . . . . . . . . . Page 23

Open-bath circulator (stainl. steel bath) C1-W13 Page 24

Open-bath circulator (stainl. steel bath) C1-W19 Page 25

Open-bath/Heating circulator (polyacr.) C1-W5P Page 26

Heating circulator C1-B3 . . . . . . . . . . . . . . . . . . . . . Page 27

Refrigerated circulator C1-K15 . . . . . . . . . . . . . . . . Page 27

Refrigerated circulator C1-K20 . . . . . . . . . . . . . . . . Page 27

DC1 Immersion circulator DC1 . . . . . . . . . . . . . . . . . . . . Page 23

Open-bath circulator (stainl. steel bath) DC1-W13 Page 24

Open-bath circulator (stainl. steel bath) DC1-W19 Page 25

Open-bath circulator (polyacr.) DC1-W12P . . . . . Page 25

Open-bath circulator (polyacr.) DC1-W18P . . . . . Page 25

Open-bath circulator with cooling DC1-V . . . . . . . Page 24

Heating circulator DC1-B3 . . . . . . . . . . . . . . . . . . . Page 27

Refrigerated circulator DC1-K15 . . . . . . . . . . . . . . Page 27

DC3 Immersion circulator DC3 . . . . . . . . . . . . . . . . . . . . Page 23

Open-bath circulator (stainl. steel bath) DC3-W15 Page 24

Open-bath circulator (stainl. steel bath) DC3-W26 Page 25

Open-bath circulator with cooling DC3-V . . . . . . . Page 24

Open-bath/Heating circulator (polyacr.) DC3-W5P Page 26

Heating circulator DC3-B3 . . . . . . . . . . . . . . . . . . . Page 27

Refrigerated circulator DC3-K15 . . . . . . . . . . . . . . Page 27

Refrigerated circulator DC3-K20 . . . . . . . . . . . . . . Page 27

DL3 Immersion circulator DL5 . . . . . . . . . . . . . . . . . . . . Page 23

Open-bath circulator DC5-W26 . . . . . . . . . . . . . . . Page 25

Open-bath circulator DC5-W45 . . . . . . . . . . . . . . . Page 25

Open-bath circulator DC5-W46 . . . . . . . . . . . . . . . Page 25

DC5 Immersion circulator DC5 . . . . . . . . . . . . . . . . . . . . Page 23

Open-bath circulator (stainl. steel bath) DC5-W26 Page 25

Open-bath circulator (stainl. steel bath) DC5-W45 Page 25

Open-bath circulator (stainl. steel bath) DC5-W46 Page 25

Heating circulator DC5-B3 . . . . . . . . . . . . . . . . . . . Page 27

Refrigerated circulator DC5-K20 . . . . . . . . . . . . . . Page 27
10

31

32

35

36

20

.

!

!

Assembly

23

8.1 Immersion circulators with bracket mounting

1 Screw angled nozzle onto pump outlet 10.

Attach bracket mounting for bath vessel 32:

2 Stand the temperature control module upside-down,

 Dry unit first if necessary, in order to avoid exposing the electronics to water penetration.

3 Unscrew pair of screws 31 and remove spacers

4 Attach bracket mounting using these screws.

5 For the C1:

Attach the control thermometer bracket to the casing

screw 20 at the side. This is possible on both the right

or left side.

All containers which fulfill the following conditions can be

used as the bath vessel:

 • perpendicular walls,

 • corrosion-resistant,

 • minimum bath depth 150 mm (DL3 = 250 mm) (35),

 • wall thickness max. 26 mm (36).

 Polyacrylic and other plastic vessels are instable

at higher temperatures, therefore:

• Only use under supervision!

• Set the excess temperature protection

accordingly

(below 65°C for polyacrylic baths)!

• The usage of a bath bridge is recommended in order to avoid a one-point load on the bath vessel!

Further on page 34 “Filling”.

An explanation on how to mount an optional

cooling coil can be found on page 28.

Afterwards further on page 32.
10

31

33

21

20

.

33

!

Assembly

24

8.2 Open-bath circulators with angled mountings

1 Screw angled nozzle onto pump outlet 10.

Attach angled mounting for bath vessel 33:

2 Stand the temperature control module upside-down,

 Dry unit first if necessary, in order to avoid exposing the electronics to water penetration.

3 Unscrew pair of screws 31 and remove spacers,

4 Attach bracket mounting using these screws.

5 Attach the temperature control module to the rear side

of the bath using the thumbwheel screws 21.

6 For the C1:

Attach the control thermometer bracket to the casing

screw 20 at the side. This is possible on both the right

or left side.

Further on page 34 “Filling”.

An explanation on how to mount an optional

cooling coil can be found on page 28.

Afterwards further on page 32.
31

37

31

34

10

21

. . 34a

!

Assembly

25

8.3 Open-bath circulators with bath bridge and

stainless steel or polyacrylic baths

Preparation:

1 Stand the temperature control module upside-down,

 Dry unit first if necessary, in order to avoid exposing the electronics to water penetration.

2 Unscrew pair of screws 31 and remove spacers,

3 Slide the seal 34 over the shaft up to shortly before the

screw heads 34a. Please note the the screws are not

symmetrically aligned!

Rotate the seal accordingly.

Mounting the bridge:

4 Slide the bridge 37 over the shaft as far as the seal 34.

Now slide it and the seal as far as the screw heads or

stopper.

5 Insert the screws 31 through the bridge and screw tight

(insert 50 mm extension piece if necessary for bridge

H34 and use sheet casing).

6 Screw angled nozzle onto pump outlet 10.

The seal 34 may have to be pressed slightly into the

respective recess from above.

Mounting the bridge onto the bath vessel:

7 Attach the bridge to the bath vessel with the thumbwheel screws 21 (bridge overlaps; only tighten screws

lightly).

8 Fit the supplied conical bungs in the thermometer holes

in the bridge.

Further on page 34 “Filling”.

An explanation on how to mount an optional

cooling coil can be found on page 28.

Afterwards further on page 32.

An explanation on how to mount an optional

lifting platform can be found on page 29.
39

31

21

9

40

31

34

. . 34a

9a

40

!

Assembly

26

8.4 Open-bath and heating circulators with bath

bridge H33 and polyacrylic bath

Preparation:

1 Stand the temperature control module upside-down,

 Dry unit first if necessary, in order to avoid exposing the electronics to water penetration.

2 Unscrew pair of screws 31 and remove spacers,

3 Slide the seal 34 over the shaft up to shortly before the

screw heads 34a. Please note the the screws are not

symmetrically aligned!

Mounting the bridge:

4 Slide the bridge with the accessories already fitted over

the shaft as far as the seal 34 (with the drilling 39 towards the back). The cooling coil now surrounds the

shaft.

Now slide the bridge and the seal as far as the screw

heads or stopper.

5 Insert the screws 31 through the bridge and screw tight.

Mounting the swivel part of the circulation set 40:

6 Preparation:

Unscrew the screw 9 from the unit shaft and loosen

screw 9a of the circulation set 40.

7 Locate swivel part 40,

8 Insert screw 9. Slightly tighten both screws 9 and 9a.

Mounting the bridge onto the bath vessel:

9 Attach the bridge to the bath vessel with the thumbwheel screws 21 (bridge overlaps; only tighten screws

lightly).

10 Fit the supplied conical bungs in the thermometer holes

in the bridge.

Further on page 30 “Connecting Hoses”.
31

34

. . 34a

31

37

37

38

9

40

9a

40

!

Assembly

27

8.5 Heating circulators with bath vessel B3

Refrigerated circulators with cooling bath K15 or K20

The plate 37 is equipped with a wide range of

accessories according to the unit ordered:

 • Plate + circulation set + cooling coil (fully equipped B3)

 • Plate + circulation set (fully equipped K15 and K20)

 • Plate + cooling coil (optional)

 • Plate without accessories (optional)

1 Stand the temperature control module upside-down,

 Dry unit first if necessary, in order to avoid exposing the electronics to water penetration.

2 Unscrew pair of screws 31 and remove spacers,

3 Slide the seal 34 over the shaft up to shortly before the

screw heads 34a. Please note the the screws are not

symmetrically aligned!

Mounting the plate:

4 Slide the plate 37 with the accessories already fitted

over the shaft as far as the seal 34. Now slide it and the

seal as far as the screw heads or stopper.

5 Insert the screws 31 through the plate and screw tight.

Mounting the swivel part of the circulation set 40:

6 Preparation:

Unscrew the screw 9 from the unit shaft and loosen

screw 9a of the circulation set 40.

7 Locate swivel part 40,

8 Insert screw 9. Slightly tighten both screws 9 and 9a.

Mounting the plate on the bath vessel / cooling unit:

9 Locate the plate 37 with the attached temperature control module on top of the bath vessel / cooling unit and

secure using the four sunken screws 38.

10 Fit the supplied conical bungs in the thermometer holes

in the bridge.

Further on page 30 “Connecting Hoses”.

If a cooling coil and not a circulation set has been ordered: further on page 32 “Tap Water Cooling”.

Afterwards further on page 34.
HAAKE DC

A

B

37

Assembly

28

8.6 Subsequently fitting a cooling coil

Open-bath circulators with bracket mounting A or

angled mounting B

1 Remove the hexagon nuts from the cooling coil.

2 Insert cooling coil from below through the bracket or

angled mounting as illustrated.

The cooling coil now surrounds the shaft of the temperature control module.

3 Adjust the cooling coil (it should be equally spaced

away from the shaft on all sides) and screw tight using

hexagon nuts..

4 Attach the cooling coil with the bracket or angled

mounting to the unit according to the instructions on

pages 20 and 21.

Open-bath circulators with a plate on a bath bridge:

1 Remove the covering plate from the marked openings

(↓↓).

2 Insert cooling coil from below into the plate 37 as illustrated.

The cooling coil now surrounds the shaft of the temperature control module.

3 Adjust the cooling coil (it should be equally spaced

away from the shaft on all sides) and screw tight using

using the screw which previously held the covering

plate
43

45

44

46

47

45a

Assembly

29

8.7 Fitting a lifting platform to the bridge

8.7.1 Lifting platforms 333-0217 and 333-0227

1 Remove the closure pieces 43 and loosen nuts 45a

and 46,

2 Insert the two handles with the sleeves 44 of the lifting

platform from above and tighten nut 45a from below using a wrench,

3 Adjust the handles to the same height by loosening and

subsequently locking the thumbwheel screws 45,

4 Stand the temperature control module with the bath

bridge and inserted rods upside-down,

5 Locate the lifting platform 47 and screw tight using nuts

46 a washers,

6 Place the entire assembly onto the bath vessel.

The height adjustment of the lifting platform is carried

out via the thumbwheel screws 45.
A

!

!

!

!

!

!

Connecting Hoses

30

9. Connecting Hoses

Pump nozzle A:

front: return flow from external object

rear: outlet to external object (pressure side)

Hoses are normally used to connect the pump with an external vessel. If objects are to be temperature controlled in the

internal bath only, the pump nozzles A can be closed with

a covering plate D attached with a union nut E (supplied as

standard). However, in order to achieve a better temperature

constancy, it is recommended not to close but to connect the

two nozzles with a short hose with a min. length of 50 cm.

General recommendations concerning the max. allowable

length of hoses cannot be given. It all depends largely on the

size, form and material of the external vessel to be temperature controlled. It should be understood that the length of a

hose and its diameter combined with the circulating capacity

have a large effect on the temperature control effectiveness.

Whenever possible, the decision should be made in favor of

the wider hose diameter and the vessel to be temperature

controlled should be placed as close as possible to the circulator.

High operating temperatures will lead to high temperatures on the hose surface, this is even more so

at the metal nozzles. In this case: DO NOT TOUCH!

The required hose material is dependent on the

heat transfer liquid used.

Hoses must not be folded or bent!

A wide radius should be used if turns have to be

made!

Hoses may become brittle after prolonged use or

they may get very soft. They should, therefore, be

checked regularly and exchanged if necessary!

Secure all hose connections using hose clamps!

9.1 Plastic hoses

It must be ensured that the hoses selected are fully suitable

for the particular application, i.e. that they will not split, crack

or become disengaged from their nozzles.

HAAKE circulators are supplied with Perbunan hoses as

standard. They have proven their versatility in the temperature range between - 30 to + 100°C.

Perbunan is resistant against water, alcohol and most oils.

The hose delivered as standard is only suitable for

temperature up to 100°C (or 210°F)!
A BE

A

!

7

Connecting Hoses

31

Hoses for other thermal liquids and temperature ranges can

also be supplied by HAAKE:

Hose material: Permissible Remarks:

Temperature range:

PVC 10 to 60°C For water only!

Viton – 60 to 200°C

Silicone – 30 to 220°C Not for silicone oil!

Metal –100 to 350°C universally suitable

The hoses are connected using the hose fittings B supplied

for 8 or 12 mm ∅ which are attached to the pump nozzle A

with the coupling nut E.

9.2 HAAKE metal hoses

HAAKE metal hoses (stainless steel insulated) offer a particularly high degree of safety and are suitable for both low and

high temperatures.

The metal hoses are attached directly to the nozzle A, gaskets are not required.

The hoses must not be extremely bent or subjected

to mechanical strain!

These hoses are available in lengths of 0.5, 1.0 and 1.5 meters from HAAKE. Couplings for connecting two hoses are

also available if other lengths should be required for a particular application.

The smallest opening inside the metal hoses is 10 mm. The

metal hoses are provided with coupling nuts (M16 x 1, DIN

12 879, part 2) at either end. The counter piece for attaching

them complies to the left hand sketch.
K

Heating / Open-bath circulator

External

Object

FlowThrough

Cooler

Connecting Hoses

32

9.3 Tap water cooling

Only for units without own refrigeration unit!

9.3.1 Connection to cooling (tap) water

Using the cooling coil a lowest operating temperature

approx. 3°C above the given cooling water temperature can be achieved.

1 Use hoses with 8 mm internal ∅ and connect to the

cooling coil K. The direction of the flow can be freely selected. It must be taken care that at the outlet side, the

water can run out unhindered.

Pressure fluctuations of the public water net may hamper the temperature constancy. For proper results the

water pressure should be stable or measures should

be taken to keep it stable.

The min. pressure should not be below 1 bar.

2 The amount of flow should be set to a min. value. At

first the full flow should be used so that the unit can

reach its operating temperature. Then, the amount of

flow should be reduced using the water cock or a hose

clamp. The actual temperature will rise above the set

temperature if the water flow is insufficient. If so increase the water flow,

9.4 External Cooling Devices

With immersion and flow-through coolers from HAAKE, the

heat transfer liquid can be cooled down considerably below

0°C and the circulator can be rendered independent of tap

water.

A flow-through cooler should be used for the C1-B3,

DC1-B3, DC3-B3 and DC5-B3. The flow-through cooler is

hooked up into the return flow line of the external vessel and

from there to the circulator (see Fig.).

Immersion coolers have proven themselves especially suitable for open-bath circulators with angled brackets or the

bath bridge H32.

The fitting opening is already provided in the bath bridge

H32.

The assembly and application are described in the cooler

instruction manual in detail.
A

Heating / Open-bath circulator

External

Object

Connecting Hoses

33

9.5 Pressure pump

9.5.1 Temperature controlling an object in the

internal bath

Close pressure and return port A with the closing

pieces and coupling nuts or, better yet, connect the two

nozzles with a short hose.

9.5.2 Connection of external closed systems

E.g. instruments with a pressure-tight temperature

jacket or coil or a heat exchanger.

Hose connection:

From the pressure port (at the rear) to the external object and then back to the return port (at the front).

If it cannot be avoided that the external object is situated higher than the circulator, the heat transfer will

only not flow back on the condition that the system is

completely tight and leak-free. To be on the safe side

it may be considered necessary to fit stop cocks to the

inlet and outlet hoses.
!

!

Filling

34

10. Filling with Bath Liquid

The selection of the proper bath liquid (heat transfer liquid)

influences the capacity of a temperature control unit decisively. The technical data with special emphasis on the temperature accuracy was established in accordance with

DIN 58 966 (water at 70°C).

The temperature accuracy will decrease the higher viscosity

of the heat transfer liquid and the lower its heating capacity

is.

It is difficult to arrive at valid statements which can be applied

as a general rule as the length of the hoses, the volume and

the material of the connected systems have a great influence

on this accuracy.

The heating up and the cooling down time of a system to be

temperature controlled can be influenced by the bath liquid

too. Oil, for instance, cuts this time in half when compared to

water.

10.1 Recommended bath liquids

 5 to 95°C Distilled Water

 • Normal tap water leads to calcareous deposits necessitating frequent unit decalcification.

 Calcium tends to deposit itself on the heating element. The heating capacity is reduced and service

life shortened!

 • Water, of course, can be employed up to 95°C, however above 80°C water vaporization reaches a level

which necessitates the liquid to be constantly replenished.

 Immersion circulators which are not combined

with a bath bridge should not be operated

constantly over a vapor emitting bath!

–30 to 80°C Water with Antifreeze

In applications below 5°C the water has to be mixed with an

antifreeze. In doing so, the amount of antifreeze added

should cover a temperature range 10°C lower than the operating temperature of the particular application. This will prevent the water from gelling (freezing) in the area of the evaporating coil the surface area of which is much colder than the

working temperature. An excess of antifreeze deteriorates

the temperature accuracy due to its high viscosity.
! Important !

! Important !

! Important !

! Important !

Filling

35

–30 to 145°C HAAKE SIL180

...this heat transfer liquid is suitable for covering nearly the

entire range with just one liquid especially when used with

the cooling units K15 and K20.

Unfortunately SIL180 has a creeping tendency necessitating the occasional cleaning of the bath cover.

above 80°C HAAKE offers a range of heat transfer liquids for these temperature control applications.

MIN ... : Mineral oil is inexpensive, it can however cause

annoying smells.

Synth ... : Synthetic thermal liquid with a medium life span

(some months) and little smell annoyance.

SIL ... : Silicone oil with a very long life span ( > 1 year)

and negligible smell.

Please get in contact with us should you have any questions.

We are glad to advise you and can help you to choose a heat

transfer liquid suitable for your application

HAAKE heat transfer liquids are supplied with an EC Safety

Data Sheet.

HAAKE takes no responsibility for damages caused by

the selection of an unsuitable bath liquid.

Unsuitable bath liquids are liquids which e.g.

 • are very highly viscous (much higher than 30 mPa⋅s at

the respective working temperature)

 • have corrosive characteristics or

 • tend to cracking

It is absolutely mandatory that the overtemperature cutoff point is set lower than the flash point for the heat

transfer liquid selected. (See Chapter 16).

The highest working temperature as defined by the EN

61010 (IEC 1010) must be limited to 25°C below the

flashpoint of the bath liquid.

Please ensure when selecting the heat transfer liquid

that no toxic gases can be generated and bear in mind

that inflammable gases can build up over the liquid during usage.
2

2

Filling

36

10.2 Filling with heat transfer liquid

Filling level of the interior bath:

max. up to 2.0 cm below the cover plate,

min. up to 5.0 cm below the cover plate.

When working with water or water with antifreeze:

or with oil below ambient temperature:

the filling level should be 2 cm below the deck plate.

When working with oil above 80°C:

Keep level somewhat lower. Oil expands when being

heated. Rule of thumb: 10% volume increase per 100°C heat

increase.

External systems included within the circulating circuit have

to be filled with the same heat transfer liquid in order to avoid

too much liquid being drawn from the internal bath.

The bath level should be checked when the preset temperature has been reached!

Quite often closed external systems cannot be prefilled as

suggested. In this case the internal bath of the unit has to be

filled to the max. level. After starting the unit, the pump will

feed the necessary liquid to the external system. Should the

demand be higher than the volume difference between high

and low, the low liquid level sensor will be activated and the

pump switched off.

In this case:

1 Replenish the liquid,

2 Reset the unit:

Press in the outer ring 2 (at the rear) for the C1 and

DC1,

Depress the key 2 (at the front) for the DC3, DL3 and

DC5

⇒ The unit starts up again

3 Repeat this action if necessary.
23

!

Draining

37

11. Draining

The temp. control unit is drained at the nozzle 23.

1 Place a suitable vessel underneath nozzle.

Bear in mind that the liquid will run out in a slight arc.

2 Turn plug slowly until it becomes disengaged from the

thread. A pin will prevent the liquid from running out

right away.

3 Pull out plug (pin) in one quick motion. The liquid will

start to run out.

4 Possible residues can be drained by tilting the circulator slightly.

 Hot heat transfer liquid should not be drained!

When certain conditions make draining necessary,

please act safety conscious: Wear protective

clothing and protective gloves!
28

230 V

115 V

11

30

!

!

Connecting Up

38

12. Connecting Up

12.1 Connecting to the mains

Only attach this unit to mains sockets with a grounded earth.

Compare the local mains voltage with the specifications written on the name plate. Voltage deviations of +/- 10% are permissible. The socket must be rated as suitable for the total

power consumption of the unit.

12.1.1 Only for refrigerated baths K15, K20 and V

1 Insert the mains plug 11 of the temperature control module into the socket 28 at the rear of the refrigerated bath.

2 Connect the refrigerated bath’s mains plug 30 to

a grounded mains socket.

 Socket 28 is live as soon as this connection

has been made whether the refrigerated bath

has been switched on at the mains switch or

not!

12.2 Checking the liquid circuit

Before switching on, check again to make sure that the pressure and suction ports are either connected with each other

or blocked with covering plugs or alternatively if an external

object is to be temperature controlled, that the hoses are

connected correctly and secured (see chapter 9.5).

12.3 Changing the mains plug (e.g. for Great Britain)

 This should only be carried out by qualified specialist personnel!

The mains cable wires have the following colors:

Brown = Live

Blue = Neutral

Green/Yellow= Earth
!

!

Connecting Up

39

12.4 Fuses on the unit

All units are equipped with automatic thermally-triggered

fuses.

If the fuse has triggered...

 • the fuse does not have to be exchanged – resetting suffices;

 • a red marking is visible;

 • a certain cooling down time should be allowed (approx.

5 min) before the (dip) switch can be pressed again.

 Do not use tools; do not use force. Both destroy the

fuse.

 If the fuse should be triggered again after resetting,

the unit probably has a defect. In this case the unit

should be sent in for servicing.
18

19

13

1

17

27

4

Operating the C1

40

13. Operating the C1

13.1 Switching on

1 Set the excess temperature protection clearly above

the desired operating temperature using the dial 13.

2 Switch the circulator on at the mains switch 1.

This causes:

⇒ Mains display light 17 shows green.

⇒ Pump motor starts up – the heat transfer liquid starts

to circulate.

A separate cooling device (if available) is switched on via it’s

own mains switch 27. The compressor starts with a slight

jerk. Only activate cooling device if cooling is actually required.

13.2 Setting the desired temperature

1 The set temperature is adjusted using the dial 18.

(in divisions of 1°C).

Temperature fine-adjustment is carried out using the potentiometer 19 (a small screwdriver is required for this). Fineadjustment can be controlled via a checking thermometer.

Please note that the circulator requires some time to react to

alterations.

13.3 Heating control lamp

The display 4 lights up when the heating is switched on (set

temperature is higher than the current temperature).

⇒ display 4 lights up constantly during the heating up

phase,

⇒ display 4 flashes on and off during the control phase.

The display 4 does not light up if the heating is not activated

(set temperature is lower than the current temperature).

13.4 Displaying the actual temperature

The thermometer supplied as a standard feature is graduated in segments of 0.5°C. Thermometers with smaller

gradations are available on special request. 

Please note: This thermometer is neither calibrated nor

gauged.

13.5 Excess temperature protection

Further on chapter 16.
1

13

27

3

5

8

7

6

Operating the DC1

41

14. Operating the DC1

14.1 Switching on

1 Set the excess temperature protection clearly above

the desired operating temperature using the dial 13.

2 Switch the circulator on at the mains switch 1.

This causes:

⇒ Pump motor starts up – the heat transfer liquid starts

to circulate.

⇒ Display 6 shows the actual temperature at the control

sensor (resolution 0.1°C).

A separate cooling device (if available) is switched on via it’s

own mains switch 27. The compressor starts with a slight

jerk. Only activate cooling device if cooling is actually required.

14.2 Setting the desired temperature

1 Press the key 3, until “ ” (set value) is shown at the

display 5

2 Alter the value shown on the display 6 using the keys

7 (↑) or (↓)

If one of the keys 7 is held depressed the first degree

of temperature alteration is carried out slowly. After

this, the alteration rate is multiplied by five.

3 Press the Enter key 8.

⇒ The selected value is confirmed as the new set

value.

The new value is not saved until the Enter key has

been pressed. The circulator continues to use the

old set value.

The display 6 automatically switches back to actual temperature display after a short time.

After the Enter key 8 has been depressed, the set value remains stored even in case of a power failure.
3

4 6

7

8

Operating the DC1

42

14.3 Heating control lamp

The display 4 lights up when the heating is switched on (set

temperature is higher than the current temperature).

⇒ display 4 lights up constantly during the heating up

phase,

⇒ display 4 flashes on and off during the control phase.

The display 4 does not light up if the heating is not activated

(set temperature is lower than the current temperature).

14.4 Displaying the actual temperature

Display 6 shows the actual temperature at the control sensor

with a resolution of 0.1°C.

This temperature does not correspond directly to the temperature in the circulator’s bath and even less to the temperature in the external connected system.

The temperature difference is determined by measuring the

actual current temperature using a suitable measuring device (calibrated or gauged thermometer).

It is entered into the circulator as the correction factor ” ”

(RTA system) and remains stored there.

The resolution of the correction factor “ ” according to the

RTA system is 0.01°C. Possible change ± 2,5°C.

Entry (see example overleaf):

1 Press the key 3, until “ ” is shown on the small display 5.

2 Alter the value shown on the display 6 using the keys

7 (↑) or (↓)

3 Press the Enter key 8.

⇒ The selected value is confirmed as the new

correction factor.

The new value is not saved until the Enter key has

been pressed. The circulator continues to use the

old value.

Warning: The correction factor “c” may have to be

determined again if the set temperature is altered!

The display 6 automatically switches back to actual temperature display after a short time.

After the Enter key 8 has been depressed, the correction

value (like the set value) remains stored even in case of a

power failure.
Operating the DC1

43

Example:

Set value programmed at the circulator Tset = 70.7°C

Actual temperature in bath / system Tact = 70.5°C

⇒ Deviation, calculated according to

∆T = Tset – Tact

 ∆T = 0.2°C

⇒ Entry of the corrected value ∆T as

correction factor “ ” = +0.2°C

The temperature control is thus internally altered so that the

desired 70.7°C is also attained in the external system. The

temperature displayed at the circulator and that of the external system now correspond with each other.

14.5 Excess temperature protection

Further at chapter 16.
6

2

13

1

27

3

5

8

7

Operating the DC3, DL3 and DC5

44

15. Operating the DC3, DL3 and DC5

15.1 Switching on

1 Set the excess temperature protection clearly above

the desired operating temperature using the dial 13.

2 Switch the circulator on at the mains switch 1.

This causes:

⇒ The version number of the operating software is briefly

shown at display 6: e.g. “n 1.5”

⇒ Display 6 flashes over all segments 

3 Press the Reset key 2 (= start).

⇒ Display 6 shows the actual temperature at the control

sensor (resolution 0.1°C).

⇒ Pump motor starts up – the heat transfer liquid starts

to circulate.

A separate cooling device combined with the DC3 or DC5 is

switched on via its own mains switch 27. The compressor

starts with a slight jerk. Only activate cooling device if cooling

is actually required.

15.2 Starting up again after a power failure

The temperature control module switches itself off in case of

a power failure. Display 6 flashes over all segments .

Switching on again is only possible after the reset key 2 has

been pressed. This is due to safety reasons.

The unit reacts in the same way if is switched on via a mains

switch in the laboratory.

You can choose if you want to retain these standard default

settings. The units can be switched to automatic resetting in

both cases mentioned above. This is activated via a separate menu option which can be accessed by pressing the

“menu”-key 3 whilst simultaneously switching on the unit.
6

3

5

8

7

Operating the DC3, DL3 and DC5

45

Keep pressing the key 3, until...

 is shown in the display.

This is the default setting.

If you switch with key 7 (↑) to...

 and confirm this using the Enter key 8, the DC5 will

switch on again automatically from now on and resetting after the circulator is switched on is no longer necessary.

Please consider any possible resulting risks!

Please wait, until the display returns to showing the actual

temperature and switch the circulator off. The standard

menu appears after restarting the unit.

15.3 Displaying the software version

If a key is held depressed as the unit is switched on, the operating software version no. (e.g. ‘n 1.5’) is shown on the display until the key is released.

15.4 Setting the set temperature

1 Press the menu key 3 repeatedly until “ ” (for set value)

is shown on the small display 5.

2 Increase (↑) or decrease (↓) the value shown on the

display 6 via the keys 7.

If you keep one of the keys 7 depressed, the first degree of temperature alteration is shown slowly in tenths

of a degree. After this the temperature alteration rate

accelerates to five times quicker.

3 Press the Enter key 8.

⇒ The selected value is confirmed as the new set

value.

The new value is not saved until the Enter key has

been pressed. The circulator continues to use the

old set value.

Warning: The correction factor “c” may have to be

determined again if the set temperature is altered!

(see chapter 15.6)!

If the symbols and in the display 5 flash alternately,

then = . 

Go to chapter 15.7.

The display 6 automatically switches back to actual temperature display after a short time.

After the Enter key 8 has been depressed, the set value remains stored even in case of a power failure.

If it is not possible to set the desired temperature

due to a fault (display “ xx”), please read chapter 17.2.
6

3

4

7

8

Operating the DC3, DL3 and DC5

46

15.5 Heating control lamp

The display 4 lights up when the heating is switched on (set

temperature is higher than the current temperature).

⇒ display 4 lights up constantly during the heating up

phase,

⇒ display 4 flashes on and off during the control phase.

The display 4 does not light up if the heating is not activated

(set temperature is lower than the current temperature).

15.6 Displaying the actual temperature

Display 6 shows the actual temperature at the control sensor

with a resolution of 0.1°C.

This temperature does not correspond directly to the temperature in the circulator’s bath and even less to the temperature in the external connected system.

The temperature difference is determined by measuring the

actual current temperature using a suitable measuring device (calibrated or gauged thermometer).

It is entered into the circulator as the correction factor ” ”

(RTA system) and remains stored there.

The resolution of the correction factor “ ” according to the

RTA system is 0.01°C. Possible change ± 2,5°C.

Entry (see example overleaf):

1 Press the key 3, until “ ” is shown on the small display 5.

2 Alter the value shown on the display 6 using the keys

7 (↑) or (↓)

3 Press the Enter key 8.

⇒ The selected value is confirmed as the new

correction factor.

The new value is not saved until the Enter key has

been pressed. The circulator continues to use the

old value.

Warning: The correction factor “c” may have to be

determined again if the set temperature is altered!

The display 6 automatically switches back to actual temperature display after a short time.

After the Enter key 8 has been depressed, the correction

value (like the set value) remains stored even in case of a

power failure.
Operating the DC3, DL3 and DC5

47

Example:

Set value programmed at the circulator Tset = 70.7°C

Actual temperature in bath / system Tact = 70.5°C

⇒ Deviation, calculated according to

∆T = Tset – Tact

 ∆T = 0.2°C

⇒ Entry of the corrected value ∆T as

correction factor “ ” = +0.2°C

The temperature control is thus internally altered so that the

desired 70.7°C is also attained in the external system. The

temperature displayed at the circulator and that of the external system now correspond with each other.
3

5

7

6

8

!

!

Operating the DC3, DL3 and DC5

48

15.7 Temperature limitation 

The setting range of the operating temperature of the circulator can be limited if the application or the flash point of the

selected heat transfer liquid requires this.

 This is not a safety element but merely an aid to

help avoid user faults when operating the unit. The

excess temperature protection must be set separately.

Setting the set value limitation can only be carried out via

the keyboard and not via the RS232C interface. Only set

values that correspond to S < H can be entered.

Temperature limitation:

1 Press the key 3, until “ ” is shown at the display 5.

2 Alter the value shown on the display 6 using the keys

7 (↑) or (↓). Setting is possible with a resolution of 1°C.

and only with positive values.

3 Press the Enter key 8.

⇒ The selected value is confirmed as new limit

value.

 Each DC5 is set to a highest temperature “ ” of 150°C

in the factory.

The value must not be altered if the compressor

cooled units K15, K20 or V are used!

Higher temperatures can damage the compressor

cooling circuit and the bath insulation.

The new value is not saved until the Enter key has

been pressed. The circulator continues to use the

old value.

The display 6 automatically switches back to actual temperature display after a short time.

15.7.1 Subsequently altering the temperature

limitation 

When subsequently altering the set value limitation 

to a value below that of the already preset temperature

set value , the set value is automatically reduced

to = and saved permanently with .

An alteration of to a value > does not alter the set

value .
15

!

Operating the DC3, DL3 and DC5

49

15.8 RS232C Interface

The DC5 is equipped with an RS232C interface 15.

For applications and commands see chapter 19.

15.9 The display cannot be altered

It can happen that the microprocessor ‘freezes’ under certain unfavorable external conditions e.g. mains voltage

surges or electro-magnetic disturbances. In this state it no

longer reacts to further entries and displays a random value

as the set value (e.g. -90°C) which cannot be altered.

The unit can be rendered operable again by a simple RESET

as follows:

1 Switch the unit off at the mains switch.

2 Keep the keys and simultaneously depressed

whilst you switch the unit back on again.

Release the keys as soon as you see the word

 shown on the display.

The microprocessor is now reset to its basic default settings.

 ALL other parameters must now be entered again.
13

2

6

2

13

16

C1, DC1

C1, DC1

!

Excess Temperature Protection

50

16. Excess Temperature Protection

If one of the safety devices is triggered:

 • The fault display light 16 (for the C1 and DC1) lights up

 • The fault cause is shown in the display 6 (for the DC3

and DC5) (see also chapter 17.2).

 • An acoustic signal is sounded (for the DC3 and DC5)

 • all voltage conducting unit components (the heating

element and pump motor) are switched off immediately

i.e. the safety circuit transfers the unit to a stable, safe

condition.

The fault cause must be identified and remedied.

After the fault has been eliminated the unit can be started

again by pressing the Reset key 2 (outer ring 2 at rear for

C1 and DC1).

16.1 Excess temperature protection dial

It offers protection against dangers caused by an uncontrolled heating up of the heat transfer liquid above the desired set temperature.

The cut-off temperature is adjusted with the excess temperature setting dial 13.

Proper protection can only be guaranteed if the

cut-off point has been correctly set.

There are two main aims for correct setting:

 • Safety (primary importance):

Protection against ignition of the heat transfer liquid.

The cut-off point must be set at least 25°C below the

flash point of the bath liquid used.

 • Protection of the object to be temperature controlled (secondary importance):

Additional protection, e.g. of a biological sample. The

cut-off point should be set as close as possible to the

desired temperature value.
2

16

2

C1, DC1

13

13

C1, DC1

7

Excess Temperature Protection

51

16.1.1 Setting the excess temperature

The cut-off point is set with the excess temperature dial 13

with a rough scale of temperature values arranged around

it. This scale, of course, can only serve as an approximate

setting means for this cut-off point. However, the cut-off point

can be determined to act exactly if the following procedure

is adhered to:

If for instance a bath liquid has a flash point of 60°C the unit

should cut off after reaching 35°C at the latest:

1 First set the desired set value “ ” using keys 7 (↑) or

(↓) to exactly 35°C.

2 After the circulator has reached this temperature, turn

the excess temperature dial 13 backwards very slowly

(to the left) until the unit cuts off (acoustic signal, malfunction light 16 is on).

3 Then set the set temperature to the actual temperature

(< 35°C).

4 Reset the unit via the Reset key 2 after the heat transfer

liquid has cooled down somewhat.

⇒ The unit can now be used for temperatures below

35°C. As soon as 35°C is reached, it is securely

switched off.

16.1.2 Testing the cut-off point

Set the set temperature to a higher value than 35°C, set the

unit to heat up and watch the digital display or thermometer.

The value indicated when the alarm goes off is the real cutoff temperature. The reaching of the cut-off point is indicated

at the display by the following message:
16

Fault Displays

52

17. Fault Displays

17.1 C1 and DC1

17.1.1 Excess temperature or low liquid level

Fault display light 16 is illuminated; heating element

and pump are completely switched off.

The excess temperature protection can be triggered if:

 • there is not enough liquid in the bath

⇒ check for leaks, top up if necessary,

⇒ fluid has evaporated, top up if necessary.

 • Excess temperature has been set too closely to

the desired set temperature

⇒ increase value slightly according to specifications made in chapter 16.1.1.

 • the control function is defective

⇒ Return unit for servicing.

17.1.2 Motor or pump overloading

The motor or pump is blocked:

⇒ The motor switches itself off. The motor

switches itself back on again automatically

a few minuted later after the temperature has

dropped again.

⇒ Check the pump for leaks.

Return the unit for servicing if necessary!
6

2

Fault Displays

53

17.2 DC3, DL3 and DC5

An acoustic signal is sounded and “ xx” is shown on

display 6.

The heating element and pump are completely

switched off.

The following faults are possible:

= Excess temperature

= Low liquid level

= Pump or motor overloading

= Sensor breakage or short circuit

= Undefined fault

= Range exceeded

= Parity fault

17.2.1 Excess temperature

The excess temperature protection can be triggered if:

 • Excess temperature has been set too closely to

the desired working temperature

⇒ increase value slightly according to specifications made in chapter 16.1.1.

 • the control function is defective

⇒ Return unit for servicing.

17.2.2 Low liquid level

The low liquid level protection can be triggered if:

 • there is not enough liquid in the bath

⇒ check for leaks, top up if necessary,

⇒ fluid has evaporated, top up if necessary.

17.2.3 Pump or motor overloading

The motor or pump is blocked:

⇒ It can take 10 min or longer, until the motor temperature has sunk far enough so that the unit

can be switched on again by pressing the reset

key 2. If the circulator switches off again after a

short time, return the unit for servicing!
6

2

Fault Displays

54

17.2.4 Sensor breakage or short circuit

The sensor must be exchanged by qualified service

personnel. Please return unit for repairs.

17.2.5 Undefined fault

This can be caused by fault which only occurs for a

short period of time, i.e. with a fluctuating bath level

when the filling level is very close to minimum.

Before returning the unit, top up with heat transfer liquid. This fault can often be remedied in this way!

In all other cases this unit must be checked by qualified

service personnel.

17.2.6 Range exceeded

The set value and high limit value are cyclically

checked for their validity. The fault message “B Err” is

shown on the display in case of the range being exceeded. The heating is switched off.

⇒ Switch the unit off and start it up again according

to the instructions detailed in chapter 15.9.

⇒ Return the unit for repairs in case of repeated

faults.

17.2.7 Parity fault

All data is saved together with a corresponding parity

bit in the permanent storage (SRAM). When this data

is accessed, the respective parity bit is checked. In

case of a parity fault the fault display “S Err” is shown

on the display. The heating then shuts itself down.

⇒ Switch the unit off and start it up again according

to the instructions detailed in chapter 15.9.

⇒ Return the unit for repairs in case of repeated

faults.

17.2.8 External fault

The DC5 can be switched to fault status via the

RS232C interface. In this case see chapter 19.6 (command “ER”).

17.2.9 Fault eliminated?

After the fault has been eliminated, the cause of the

fault is shown on the display 6 (e.g. ). The preceding three zeros mean that the fault has been eliminated

The reset key 2 must be pressed in order to start up

the unit again.
Testing the Safety Features

55

18. Testing the Safety Features

The safety features for excess temperature protection and

low liquid level protection must be checked at regular intervals. The level of regularity of checking depends on the unit’s

designated application and the heat transfer liquid used (inflammable or non-inflammable). Practical experience has

shown that between 6 to 12 times a year is sufficient.

18.1 Excess temperature protection

Set a cut-off temperature (see chapter 16.1) that is lower

than the desired set temperature. Switch on the circulator

and check if the circulator really does switch itself off at the

set cut-off temperature

If not follow the specifications detailed in chapter 16.1.1.

It may be deemed necessary to have the unit checked over

by qualified service personnel.

18.2 Low liquid level protection

(for the DC3, DL3 and DC5)

Drain the heat transfer liquid slowly during operation (use

a drainage tap if necessary) and check if the unit really does

switch itself off (see chapter 11).

If not the unit must be checked over by qualified service personnel.
RS232C Interface for DC5

56

19. RS232C Interface for DC5

The following circulator functions can be controlled by a

computer via the RS232C interface:

 • Setting the desired set temperature “ ” and correction

factor “ ” is possible;

 • the actual temperature can be read off;

 • the circulator can be reset, started or stopped;

 • any fault messages can also be displayed.

19.1 Connecting the DC5 to a computer

The pin assignment required when connecting a DC5 to a

computer via a 9-pin RS232C socket is as follows:

3

2

7

8

5

RxD(Received Data)

TxD(Transmitted Data)

CTS(Clear to Send)

RTS(Request to Send)

Signal ground

DTR

DC5

3

2

7

8

5

6 6

9 pin RS232C Cable (9pin to 9pin)

3

2

7

8

5

6

TxD

RxD

RTS

CTS

DSR

Computer

9 pin RS232C

3

2

7

8

5

6

The pin assignment required when connecting a DC5 to a

computer via a 25-pin RS232C socket is shown overleaf.
RS232C Interface for DC5

57

The pin assignment required when connecting a DC5 to a

computer via a 25-pin RS232C socket is as follows:

2

3

4

5

7

RxD(Received Data)

TxD(Transmitted Data)

CTS(Clear to Send)

RTS(Request to Send)

Signal ground

DTR

DC5

3

2

7

8

5

6 6

25 pin RS232C Cable (25pin to 9pin)

2

3

4

5

7

6

TxD

RxD

RTS

CTS

DSR

Computer

3

2

7

8

5

6

9 pin RS232C

19.2 Interface parameters

Interface parameters can only be set/altered via the DC5 operating panel.

Handshake (OFF= without RTS/CTS

(ON = with RTS/CTS)

Parity (OFF= without parity

(odd = odd parity

(E = even parity)

Baud rate (600, 1200, 2400, 4800, 9600)

These three transfer parameters cannot be altered via the interface.

DC5 maximum baud rate

We recommend a maximum Baud rate of 4800 bps.

The communication between the PC and the DC5 circulator

should take place at a maximum Baud rate of 4800 bps.

Data transfer faults can occur at a Baud rate of 9600 bps.
5

RS232C Interface for DC5

58

19.3 Requirements made of external units

Only units which have been tested according to

EN 60950 (=IEC 950) should be connected to the

DC5 interface!

19.4 Setting the desired set value 

If the desired value is set via the computer, two horizontal lines are shown on the display 5.

Additionally:

a) If the RS232C connection is interrupted, the circulator controls the temperature to the last set value entered via the interface.

b) After the mains supply current has been switched

off and on, the circulator controls the temperature to

the last value entered via the DC5 keyboard itself

and not the value given by the computer.

19.5 Correction value 

If the correction value is set via the computer, two horizontal lines are shown on the display 5. The correction

value only remains saved for as long as the supply voltage is switched on

Additionally:

a) If the RS232C connection is interrupted, the circulator operates to the last correction value entered via

the interface.

b) After the mains supply current has been switched

off and on, the circulator operates to the last value

entered via the DC5 keyboard itself and not the

value given by the computer.
2 Spaces

RS232C Interface for DC5

59

19.6 Commands for DC5 circulators

(Capital letters must not be ignored!)

V<cr> current operating software version . . . . . . . . . . . . 

e.g..: ”DC5 : 1.1–4/93$”

RS<cr> RESET . . . . . . . . . . . 

Actual value

I<cr> call up ACTUAL temperature: . . . . . . . . . . . . . 

<value> = <VZ>XXXX.XX [

C$<cr><lf>

e.g.: ”–0023.45 [

C$” T = –23.45°C

Set value

S<cr> call up SET temperature: . . . . . . . . . . . . 

<value> = <VZ>XXXX.XX [C$<cr><lf>

e.g.: ”+0023.45 [

C$” ⇒ set = 23.45°C

S [

[

<value><cr> set . . SET temperature in 1/100°C, automatic switching to REMOTE operation as well as blocking the ENTER key

<value> = {00000 .... 20000} ⇒ 0°C ... 200.00°C

<value> = {00000 .... –5000} ⇒ 0°C ... –50.00°C

e.g.: set = 20.0°C ⇒ ”S [

[

02000”

set = –10.5°C ⇒ ”S [

[

–1050”; VZ replaces 1. charac.

RTA Factor c

c<cr> call up Offset: <value> = <VZ>XX.XX . . . . . . . . . . . . . [

C$<cr><lf>

e.g.: ”–01.20 [

C$” ⇒ c = –1.2°C

c [

<VZ><value><cr>

set Offset in 1/100°C, automatic switching to REMOTE operation as well as blocking the ENTER key

<VZ> = {+, –};

<value> = {0000 .... +/–0255} ⇒ 0°C ... +/–2.55°C

”<Space>” and ”+” are possible as positive sign,

e.g.: c = 1.23°C ⇒ ”c [

[

0123”

or ”c [

+0123”

Start and stand-by operation

ST<cr> STOP control (heating off, pump continues) . . . . . . . . . . . 

GO<cr> START control . . . . . . . . . . 

Alarm triggering and unlocking via the V24 interface

ER<cr> unlocking . . . . . . . . . . . after switching on or after fault has been remedied

AL<cr> external alarm triggering (main relay missing, i.e. heating . . . . . . . . . . . 

and pump off)
RS232C Interface for DC5

60

19.7 DC5 keys

The Enter key on the DC5 can be blocked if the circulator is

controlled via a PC. This prevents values set via the interface

from being accidentally altered at the circulator. The key

functions UP, DOWN and MENU remain available. Alterations can however no longer be confirmed with the Enter

key.

L<cr> Switching to REMOTE operation as well as blocking the Enter key (Lock)

U<cr> Switching from REMOTE operation as well as releasing the

Enter key (Unlock)

19.8 Operating status

B<cr> call up operating status:

 ” xxxxxxxx ”, $<cr>,<lf>

0 : sensor OK

1 : sensor defective

0 : no alarm EXTERNAL

1 : alarm EXTERNAL

0 : no alarm pump

1 : alarm pump

0 : no alarm low liquid level

1 : alarm low liquid level

0 : no alarm excess temperature

1 : alarm excess temperature

0 : main relay present

1 : main relay missing

always 0, not used

0 : no active control

1 : active control
RS232C Interface for DC5

61

19.9 Example of a BASIC program

The range of commands stored in the DC5 can be activated

by this simple program:

REM command procedure for DC5

REM enter 1st command

REM 2nd command is passed on to the DC5

CLOSE

OPEN ”COM2:4800,N,8,1,CS0,DS0,CD0” AS #1

loop:

b$ = ” ”

INPUT ”command: ”;b$

if b$ = ”X” then markend

if b$ = ”x” then markend

repeat command:

PRINT #1,b$

PRINT

PRINT ”return message”

PRINT ”– – – – – – – –”

GOSUB enter

GOTO loop

markend:

END

enter:

A$ = ” ”

read loop:

X = ASC (INPUT$(1,#1))

IF X = 10 THEN read end

A$ = A$ + CHR$(X)

GOTO read loop

read end:

print a$

RETURN

Note:

Only capital letters are accepted for commands!
27

Cooling

62

20. Cooling

Only for unit combinations K15, K20 or V

The refrigerated bath is used mainly for enabling lower than

ambient or tap water temperatures in circulators or for cooling a heated bath down to a low temperature level very

quickly.

The working temperature range is shown in the technical

specifications.

Continuous cooling at set temperatures above

approx. 100°C should be avoided!

This would result an excessively high temperature in the

cooling circuit which would then result in the excess temperature protection being triggered and the compressor being

switched off. Once the temperature in the compressor circuit

were to get back to normal, the unit would then switch back

on again.

This situation must be avoided as it results in a cyclical operation of the cooling compressor which in turn reduces the

life-span of the unit.

1 In this case switch the refrigerated bath off at the mains

switch 27.

Switching the cooling compressor on for quick cooling down

purposes (even at working temperatures of 150°C) is however permissible.
26

!

!

Maintenance

63

21. Maintenance

The stainless steel surfaces of the bath vessel and of the

housing may after some time show spots and become tarnished. Normal stainless steel cleaners as they are used in

the kitchen can be used. The bath vessel and built-in components should occasionally (at least every time the bath liquid

is changed) be cleaned using a household cleaner. Vinegarbased cleaners have proved to be suitable used according

to the manufacturers recommendations.

Do not use scouring powder!

The inside of the bath vessel must be kept clean in order to

ensure a long service life. Substances containing acidic or

alkaline substances and metal shavings should be removed

quickly as they could harm the surfaces causing corrosion.

If corrosion (e.g. small rust marks) should occur in spite of

this, cleaning with stainless steel caustic agents has proved

to be suitable. These substances should be applied according to the manufacturers recommendations.

21.1 Cleaning the fins of the liquefier

In order to maintain the cooling capacity of the unit, cleaning

has to be done two to four times per year, depending on the

grade of soiling.

Switch off the unit and pull out the mains plug.

Only for ”V” bath:

1 Clean the fins with compressed air.

For extreme soiling remove the cooling compressor

casing (only specialist personnel).

Only for K15 and K20:

1 Loosen ventilation grid 26: Rotate the mounting screws

90° in any direction and remove grid.

2 Clean fins with brush or similar tool.

3 Replace grid and push screws back in (do not rotate

screws).

21.2 Discarding the unit:

One day the life span of your cooling unit will end.

Therefore:

This unit contains ozone-friendly coolant R134a.

The unit may however only be discarded by authorized personnel.
Technical Specifications

64

22. Technical Specifications

22.1 Dimensions, material and the permissible

temperature ranges of the baths

Bath Material Tempera-

 ture (°C)

 Bath opening (mm)

 w. holder w. bridge

Bath depth

(mm)

Volume (l)

from..to

Dimensions

(WxDxH) 1) (mm)

W12P P 0..60 – 300 x 165 150 9..12 310 x 335 x 340

W18P P 0..60 – 300 x 340 150 15..19 310 x 510 x 340

V S –5..150 300 x 325 300 x 175 200 10..15 535 x 335 x 400

W13 S ..200 300 x 325 300 x 175 150 7..12 335 x 360 x 350

W15 S ..200 300 x 325 300 x 175 200 10..15 335 x 360 x 400

W19 S ..200 300 x 500 300 x 350 150 12..19 335 x 535 x 350

W26 S ..200 300 x 500 300 x 350 200 20..26 335 x 535 x 400

W45 S ..200 – 300 x 500 300 37..42 360 x 540 x 510

W46 S ..200 – 300 x 700 200 26..44 360 x 910 x 410

B3 S ..200 – 130 x 100 150 3 200 x 300 x 375

K15 S –28..150 – 130 x 100 150 4,5 385 x 465 x 415

K20 S –28..150 – 130 x 100 150 4,5 230 x 460 x 590

P = Polyacryl, S = Stainless steel 1) Height including temperature control module

22.2 Technical specifications of the refrigerated baths

K15 K20 V

Voltage V 230 ± 10 % or 115 ± 10 % or 100 ± 10 %

Frequency Hz 50 (230 V)

60 (230 V)

60 (115 V)

50–60 (100 V)

50–50 (230 V)

50–60 (230 V)

50–60 (115 V)

50–60 (100 V)

Total wattage consumptionVA 2600 (230 V)

1600 (115 V)

1600 (100 V)

2550 (230 V)

1500 (115 V)

1500 (100 V)

Additional

connections

Mains socket for temperature control module

Nmax = 2100 VA(230 V)

Nmax = 1300 VA(115 V)

Nmax = 1100 VA(100 V)
Technical Specifications

65

22.3 Technical specifications of the temperature

control modules acc. to DIN 58966

C1 DC1 DC3 DL3 DC5

Operating temperature *) °C –10..100 –30..100 –30..150 –30..200 –50..200

Temperature accuracy +/– K 0.05 0.02 0.01 0.02 0.01

Heater capacity 230V W 1000 1000 1500 2000 2000

Heater cap. 115V + 100V W 1000 1000 1200 1500 1200

Pump pressure max. mbar 300 300 300 300 300

Circulation capacity (open) l/min 17 17 17 17 17

Max. flow rate during

circulation using

12 mm ø hoses

l/min 12.5 12.5 12.5 12.5 12.5

Immersion depth from..to mm 85..140 85..140 95..140 95..240 95..140

Voltage V 230 ± 10 % or 115 ± 10 % or 100 ± 10 %

Frequency Hz 50 or 60 (at 230 V) or 60 (at 115 V) or 50–60 (at 100 V)

Total wattage consumption VA 1050 1050 1550 (230 V)

1250 (115 V)

1250 (100 V)

2050 (230 V)

1550 (115 V)

2050 (230 V)

1250 (115 V)

1250 (100 V)

Safety class acc. to DIN 1W 1W 2 2 2

Excess temp. protection variable variable variable variable variable

Low liquid level protection – – fixed fixed fixed

Motor overload protection yes yes yes yes yes

Alarm signalling optical optical opt. + acoust. opt. + acoust. opt. + acoust.

FIS system – – yes yes yes

Temperature setting analog digital digital digital digital

Setting limitation – – yes yes yes

Temperature display thermometer LED green LED green LED green LED green

RTA system – yes yes yes yes

Control type ON/OFF ON/OFF PID PID PID

Control sensor analog IC digital IC Pt100 Pt100 Pt100

RS 232 C – – – – yes

 * The working temperature range is dependant on the cooling selected.
Technical Specifications

66

22.4 Fuse values

Unit type Mains voltage Fuse(s) at the

rear panel

Fuse(s)

in the unit

C1 230 V 2x6 A 1xT0,125 mA

115 V 1x10 A 1xT0,125 mA

100 V 1x12 A 1xT0,125 mA

DC1 230 V 2x6 A 1xT40 mA

115 V 1x10 A 1xT63 mA

100 V 1x12 A 1xT63 mA

DC3 230 V 2x10 A 1xT40 mA

115 V 1x15 A 1xT63 mA

100 V 1x12 A 1xT63 mA

DL3 230 V 2x10 A 1xT40 mA

115 V 1x15 A 1xT63 mA

DC5 230 V 2x10 A 1xT40 mA

115 V 1x15 A 1xT63 mA

100 V 1x12 A 1xT63 mA

K15 230 V 2x10 A/2x5 A

115 V 1x12 A/1x6 A

100 V 1x12 A/1x6 A

K20 230 V 2x10 A/2x5 A

115 V 1x12 A/1x6 A

100 V 1x12 A/1x6 A

V–Bad 230 V 2x10 A/2x5 A

115 V 1x12 A/1x6 A

100 V 1x12 A/1x6 A

Part no. 002-4088 A

Subject to alterations Printed in Germany (FRG) 1.1.035.2–11.96