JULABO SC 2500w User Manual

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Page 1

Operating Manual

SemiChill Recirculating Coolers Professional Series

SC 2500a air cooled

SC 2500w water cooled

ESC

130 60

°C

180

220

S U A

T O N

OFF

SC 2500

JULABO GmbH 77960 Seelbach / Germany

1.951.4571-V3 10/13

Tel. +49 (0) 7823 / 51-0 Fax +49 (0) 7823 / 24 91 info@julabo.de www.julabo.de

19514571-V3.doc 08.10.2013

Page 2

Congratulations!

You have made an excellent choice. JULABO thanks you for the trust you have placed in us. This operating manual has been designed to help you gain an understanding of the operation and possible applications of our circulators. For optimal utilization of all functions, we recommend that you thoroughly study this manual prior to beginning operation.

The JULABO Quality Management System

Temperature control devices for research and industry are developed, produced, and distributed according to the requirements of ISO 9001 and ISO 14001. Certificate Registration No. 01 100044846

Unpacking and inspecting

Unpack the circulator and accessories and inspect them for possible transport damage. Damage should be reported to the responsible carrier, railway, or postal authority, and a damage report should be requested. These instructions must be followed fully for us to guarantee our full support of your claim for protecting against loss from concealed damage. The form required for filing such a claim will be provided by the carrier.

Printed in Germany Changes without prior notification reserved

Important: keep operating manual for future use

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Recirculating Cooler

TABLE OF CONTENTS

Operating manual .................................................................................................................. 5

1. Intended use ................................................................................................................... 5

1.1. Description ................................................................................................................. 5

2. Operator responsibility – Safety instructions .................................................................. 6

2.1. Disposal ..................................................................................................................... 8

2.2. EC Conformity ............................................................................................................ 9

2.3. Warranty conditions ................................................................................................. 10

2.4. Technical specifications ........................................................................................... 11

2.5. Cooling water connection ......................................................................................... 14

Operating instructions ......................................................................................................... 15

3. Operating controls and functional elements ................................................................. 15

4. Safety notes for the user .............................................................................................. 18

4.1. Explanation of safety notes ...................................................................................... 18

4.2. Explanation of other notes ....................................................................................... 18

4.3. Safety instructions .................................................................................................... 18

5. Preparations ................................................................................................................. 20

5.1. Installation ................................................................................................................ 20

5.2. Connecting the external system ............................................................................... 21

5.2.1. Tubing ................................................................................................................. 22

5.2.2. Bath fluids ............................................................................................................ 22

5.3. Filling ........................................................................................................................ 23

5.4. Draining .................................................................................................................... 24

Operating procedures ................................................................................................... 25

6.1. Power connection .................................................................................................... 25

6.2. Switching on / Start - Stop ....................................................................................... 25

8.1. Excess temperature protection ................................................................................ 27

8.2. Over and Sub temperature warning functions.......................................................... 29

Setting the temperatures .................................................................................... 26

Safety installations, warning functions ................................................................ 27

8.1.1. Early warning system, low level protection .......................................................... 28

8.2.1. Change-over of the warning function to shutdown function ................................. 30

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9.1. MENU PUMP - Setting the pump pressure ............................................................... 32

9.2. MENU CONTROL – Control parameters .................................................................. 33

9.3. MENU CONFIG - configuration ................................................................................. 39

9.4. MENU SERIAL - BAUDRATE, HANDSHAKE, PARITY ........................................... 45

Menu functions .................................................................................................... 31

9.2.1. CONTROL – internal / external control ................................................................ 33

9.2.2. SELFTUNING ....................................................................................................... 35

9.2.3. DYN INT - Dynamic internal ................................................................................. 36

9.2.4. Control parameters – XP, TN, TV internal ............................................................ 36

9.2.5. COSPEED - external ............................................................................................ 38

9.2.6. Control parameters – XPU, XP, TN, TV external ................................................. 39

9.3.1. SETPOINT – Keypad control or remote control ................................................... 40

9.3.2. A-START – Autostart ............................................................................................ 41

9.3.3. OFF-MODE – Pump motor on / off ....................................................................... 42

9.3.4. RESET – Factory settings .................................................................................... 42

9.3.5. ACTVAR - actuating variable ............................................................................... 43

9.3.6. TIME / DATE – setting time and date ................................................................... 44

9.5. MENU LIMITS ........................................................................................................... 46

9.6. MENU PROGRAM – Integrated programmer ........................................................... 48

9.7. MENU ADJUST – ATC Absolute Temperature Calibration ...................................... 52

9.8.

MENU ANALOG – Analog inputs/outputs ................................................................. 56

10. Troubleshooting guide / Error messages ....................................................................... 62

11. Electrical connections .................................................................................................... 64

12. Remote control .............................................................................................................. 66

12.1. Setup for remote control ........................................................................................... 66

12.2. Communication with a PC or a superordinated data system .................................... 66

12.3. List of commands ...................................................................................................... 67

12.4. Status messages ...................................................................................................... 71

12.5. Error messages ......................................................................................................... 71

13. JULABO Service – Online remote diagnosis ................................................................. 72

14. Cleaning / repairing the unit ........................................................................................... 73

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Recirculating Cooler

Operating manual

1. Intended use

JULABO recirculating coolers have been designed to control the temperature of specific fluids in a bath tank. The units feature pump connections for temperature control of external systems (loop circuit).

JULABO recirculating coolers are not suitable for direct temperature control of foods, semi-luxury foods and tobacco, or pharmaceutical and medical products. Direct temperature control means unprotected contact of the object with the bath medium (bath

fluid).

1.1. Description

 The recirculating coolers are operated via the splash-proof keypad. The

implemented microprocessor technology allows to set and to store different values that can be indicated on the VFD COMFORT-DISPLAY. Three menu keys facilitate adjusting setpoints, warning and safety functions and menu functions.

1x10

ICC

TCF

RS232

Pt100

 The integrated programmer allows storing and running temperature and time-

dependent processes.

 “ICC - Intelligent Cascade Control“ represents the supreme solution temperature

control. ICC overs perfect temperature control with self-optimizing PID control parameters.

 The TCF - Temperature Control Features allow the user to have access to all

important temperature control parameters. This means: Full control on the control mode and the chance to manually adjust or adapt control to the specific application.

 Absolute Temperature Calibration (ATC3) provides a high temperature stability in

the bath. With the 3-point calibration an offset is adjusted at three temperatures to ensure an accurate temperature pattern at the selected spot in the bath over the full temperature range.

 Electrical connections:

The serial interface, switchable from RS232 to RS485, allows modern process technology without additional interface. Connection for Pt100 external sensor for external temperature measurement and control. The electronic module (option) provides 3 further analog connections (alarm input, standby input, recorder output, programmer input).

 The excess temperature protection conforming to IEC 61010-2-010 is a safety

installation independent from the control circuit. This protection can be indicated and set on the VFD COMFORT-DISPLAY.

SMART

PUMP

 The early warning system for low level signals that bath fluid needs to be refilled

before the low level protection conforming to IEC 61010-2-010 causes a complete shutdown of the main functional elements.

 Intelligent pump system: The pump capacity (electronically adjustable via the motor

speed) enables to adapt to varying conditions for internal and external temperature applications.

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Operator responsibility – Safety instructions

2. Operator responsibility – Safety instructions

The products of JULABO ensure safe operation when installed, operated, and maintained according to common safety regulations. This section explains the potential dangers that may arise when operating the circulator and also specifies the most important safety precautions to preclude these dangers as far as possible.

The operator is responsible for the qualification of the personnel operating the units.

 The personnel operating the units should be regularly instructed about the dangers involved with

their job activities as well as measures to avert these dangers.

 Make sure all persons tasked with operating, installing, and maintaining the unit have read and

understand the safety information and operating instructions.

 When using hazardous materials or materials that could become hazardous, the circulator may be

operated only by persons who are absolutely familiar with these materials and the circulator. These persons must be fully aware of possible risks.

If you have any questions concerning the operation of your unit or the information in this manual, please contact us!

Contact:

Safety instructions for the operator:

 Avoid strikes to the housing, vibrations, damage to the operating-element panel (keypad, display),

and contamination.

 Make sure the product is checked for proper condition regularly (depending on the conditions of

use). Regularly check (at least every 2 years) the proper condition of the mandatory, warning, prohibition and safety labels.

 Make sure that the mains power supply has low impedance to avoid any negative effects on the

instruments being operated on the same mains.

 This unit is designed for operation in a controlled electromagnetic environment. This means that

transmitting devices (e.g., cellular phones) should not be used in the immediate vicinity.

JULABO GmbH Eisenbahnstraße 45 77960 Seelbach / Germany

Tel. +49 (0) 7823 / 51-0 info@julabo.de

Fax +49 (0) 7823 / 24 91 www.julabo.de

 Magnetic radiation may affect other devices with components sensitive to magnetic fields (e.g.,

monitors). We recommend maintaining a minimum distance of 1 m.

 Permissible ambient temperature: max. 40 °C, min. 5 °C.

 Permissible relative humidity: 50% (40 °C).

 Do not store the unit in an aggressive atmosphere. Protect the unit from contamination.

 Do not expose the unit to sunlight.

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Recirculating Cooler

Appropriate operation

Only qualified personnel is authorized to configure, install, maintain, or repair the circulator. Persons who operate the circulator must be trained in the particular tasks by qualified personnel. The summarized user guidance (short manual) and the specification table with information on individual parameters are sufficient for this.

Use

The bath can be filled with flammable materials. Fire hazard! There might be chemical dangers depending on the bath medium used. Observe all warnings for the used materials (bath fluids) and the respective instructions (safety data sheets). Insufficient ventilation may result in the formation of explosive mixtures. Only use the unit in well ventilated areas. Only use recommended materials (bath fluids). Only use non-acid and non corroding materials.

When using hazardous materials or materials that could become hazardous, the operator must affix the enclosed safety labels (1 + 2) to the front of the unit so they are highly visible:

or 2

Particular care and attention is necessary because of the wide operating range. There are thermal dangers: Burn, scald, hot steam, hot parts and surfaces that can be touched.

Warning label W00: Colors: yellow, black Danger area. Attention! Observe instructions. (operating manual, safety data sheet)

Mandatory label M018: Colors: blue, white Carefully read the user information prior to beginning operation.

Scope: EU

Semi S1-0701 Table A1-2 #9 Carefully read the user information prior to beginning operation.

Scope: USA, NAFTA

Warning label W26: Colors: yellow, black

Hot surface warning. (The label is put on by JULABO)

Observe the instructions in the manuals for instruments of a different make that you connect to the circulator, particularly the corresponding safety instructions. Also observe the pin assignment of plugs and technical specifications of the products.

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Operator responsibility – Safety instructions

2.1. Disposal

The recirculating cooler contains a back-up battery that supplies voltage to the memory chips when the unit is switched off. Do not dispose of the battery with household waste! Depending on battery regulations in your country, you may be obligated to return used or defective batteries to collection sites. The product may be used with oil as bath fluid. These oils fully or partially consist of mineral oil or synthetic oil. For disposal, follow the instructions in the material safety data sheets.

This unit contains the refrigerant R404A, which at this time is not considered harmful to the ozone layer. However, over the long operating period of the unit, disposal rules may change. Therefore, only qualified personnel should handle the disposal.

Valid in EU countries

See the current official journal of the European Union – WEEE directive.

Directive of the European Parliament and of the Council on waste electrical and electronic equipment (WEEE). This directive requires electrical and electronic equipment marked with a crossedout trash can to be disposed of separately in an environmentally friendly manner. Contact an authorized waste management company in your country. Disposal with household waste (unsorted waste) or similar collections of municipal waste is not permitted!

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2.2. EC Conformity

Recirculating Cooler

Page 10

Operator responsibility – Safety instructions

2.3. Warranty conditions

JULABO GmbH warrants its products against defects in material or in workmanship, when used under appropriate conditions and in accordance with appropriate operating instructions

for a period of ONE YEAR.

Extension of the warranty period – free of charge

With the ‘1PLUS warranty’ the user receives a free of charge extension to the warranty of up to 24 months, limited to a maximum of 10 000 working hours.

To apply for this extended warranty the user must register the unit on the JULABO web site

www.julabo.de

GmbH’s original invoice.

JULABO GmbH reserves the right to decide the validity of any warranty claim. In case of faults arising either due to faulty materials or workmanship, parts will be repaired or replaced free of charge, or a new replacement unit will be supplied.

Any other compensation claims are excluded from this guarantee.

, indicating the serial no. The extended warranty will apply from the date of JULABO

Page 11

2.4. Technical specifications

Recirculating Cooler

Professional Series

Working temperature ranges:

Standard unit °C +5 ... +35 +5 ... +35

Option Low Temp °C -20 ... +35 -20 ... +35

Option Low /HighTemp I °C -20 ... +80 -20 ... +80

Temperature stability °C 0.1 0.1

Absolute Temperature Calibration INT/EXT ±3 / ±9 ±3 / ±9

Heater wattage (at 230 V) Option H1 kW 1.0 1.0

Cooling capacity °C +20 0 -10 +20 0 -10

Medium ethanol kW 2.5 1.5 0.9

Refrigerant R404A R404A

Pump capacity P3 see table 1 page 12 Flow rate P3 l/min at 0 bar 33 33

SC 2500a SC 2500w

2.5 1.5 0.9

Pressure max. P3 bar at 0 liters 3.5 3.5

Overall dimensions (WxDxH) cm 49x62/105 49x62/105

Filling volume liters 21 ... 33 21 ... 33

Weight kg 135 122,5

Ambient temperature °C 5 ... 40 5 ... 40

Mains power connection 195-253 V/50 Hz V/ Hz 230 / 50 230 / 50

Current consumption without heater A 11 (at 230 V) 11 (at 230 V)

Current consumption 1 kW heater A 15 (at 230 V) 15 (at 230 V)

Mains power connection 195-253 V/60 Hz V/ Hz 208-230 / 60 208-230 / 60

Current consumption without heater A 11 (at 230 V) 11 (at 230 V)

Current consumption 1 kW heater A 15 (at 230 V) 15 (at 230 V)

All measurements have been carried out at: rated voltage and frequency ambient temperature: 20 °C Technical changes without prior notification reserved.

* Pump P3- reduces cooling capacity by 0.3 kW

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Operator responsibility – Safety instructions

Professional series

Temperature selection digital

via keypad indication on VFD COMFORT-DISPLAY

remote control via personal computer indication on monitor

Temperature indication °C VFD COMFORT-DISPLAY

Resolution °C 0.1

Temperature control ICC - Intelligent Cascade Control

Electrical connections: Computer interface RS232 External Pt100 sensor

Optional Programmer input -100 °C to 400 °C = 0 - 10 V or 0 - 20 mA or 4 - 20 mA Input for the signal of a flow meter or external manipulated variable Temperature recorder outputs 0 - 10 V (0 V = -100 °C, 10 V = 400 °C) 0 - 20 mA (0 mA = -100 °C, 20 mA = 400 °C) 4 - 20 mA (4 mA = -100 °C, 20 mA = 400 °C) Standby input for external emergency switch-off Alarm output for external alarm signal

Table 1

Pump capacity

Bath fluid: Water, Silicone -oil

Circulating pump:

Flow rate max. Lpm at 0 bar

Pressure max. bar at 0 liter

Bath fluid: Galden

eg. Fluorinert

Pressure max. bar at 0 liter

3283

Notice:

If Galden® or Fluorinert® is used the the charge of the motor increases. Wrong adjustment causes overheating and eventually destruction of the motor.  With the circulation pump P3 a maximum pump pressure stage >PUMP 1< may

be adjusted..

The pump type can be recognized in the order no. on the name plate.

95 xx xxx _ xx PX xx

X.XX

UMP 1

P3 P3

30 33

1.8 3.5

3.5

X.XX

UMP

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Safety installations according to IEC 61010-2-010:

Excess temperature protection adjustable from 0 °C ... 220 °C

Low liquid level protection float switch

Classification according to DIN 12876-1 class III

Supplementary safety installations

Early warning system for low level float switch

High temperature warning function optical + audible (in intervals)

Low temperature warning function optical + audible (in intervals)

Supervision of working sensor plausibility control

Reciprocal sensor monitoring between working and safety sensors difference >35 °C

Alarm message optical + audible (permanent)

Warning message optical + audible (in intervals)

Recirculating Cooler

Environmental conditions according to IEC 61 010-1: Use indoors only. Altitude up to 2000 m - normal zero. Ambient temperature: see Technical specifications

Humidity: Max. relative humidity 80% for temperatures up to +31 °C, linear decrease down to 50% relative humidity at a temperature of +40 °C

Max. mains voltage fluctuations of ±10% are permissible.

Protection class according to IEC 60 529 IP21

The unit corresponds to Class I

Overvoltage category II

Pollution degree 2

Caution:

The unit is not for use in explosive environment.

EMC requirements according to EN 61326-1 This unit is an ISM device classified in Group 1 (using high frequency for internal purposes), Class A (industrial and commercial range).

Page 14

Operator responsibility – Safety instructions

2.5. Cooling water connection

Cooling water pressure (IN/OUT) max. 6 bar

Pressure difference (IN - OUT) 3.5 to 6 bar

Cooling water temperature < 20 °C

Notice: Cooling water circuit

Risk of oil leaking from the refrigeration system (compressor) of the recirculating cooler into the cooling water in case of a fault in the cooling water circuit!

Observe the laws and regulations of the water distribution company valid in the location where the unit is operated.

Notice:

Danger of corrosion of heat exchanger due to unsuitable quality of cooling water.

 Due to its high content of lime, hard water is not suitable for cooling and causes

scale in the heat exchanger.

 Ferrous water or water containing ferrous particles will cause formation of rust

even in heat exchangers made of stainless steel.

 Chlorinated water will cause pitting corrosion in heat exchangers made of

stainless steel.

 Due to their corrosive characteristics, distilled water and deionized water are

unsuitable and will cause corrosion of the bath.

 Due to its corrosive characteristics, sea water is not suitable.  Due to its microbiological (bacterial) components, which settle in the heat

exchanger, untreated and unpurified river water and water from cooling towers is unsuitable.

 Avoid particulate matter in cooling water.  Avoid putrid water.

Recommended quality of cooling water:

pH 7.5 to 9.0 Sulfate [SO4 2- ] < 100 ppm Hydrocarbonate [HCO 3-]/sulfate [SO4 2-] > 1 ppm Hardness [Ca 2+, Mg 2+]/[HCO 3-] Alkalinity 60 ppm < [HCO 3-] < 300 ppm Conductivity < 500 μS/cm Chloride (Cl -) < 50 ppm Phosphate (PO4 3-) < 2 ppm Ammonia (NH3) < 0.5 ppm Free chlorine < 0.5 ppm Trivalent iron ions (Fe 3+) < 0.5 ppm Manganese ions (Mn 2+) < 0.05 ppm Carbon dioxide (CO2) < 10 ppm Hydrogen sulfide (H2S) < 50 ppm Content of oxygen < 0.1 ppm Algae growth impermissible Suspended solids impermissible

> 0.5 dH

Page 15

130

Operating instructions

3. Operating controls and functional elements

Front view Rear view

ESC

130

180

220

°C

OFF

Recirculating Cooler

6 7 8

SC 2500

19 20

1 Mains power switch

2 Emergency stop switch

180

220

Keypad

Adjustable excess temperature protection according to IEC 61010-2-010

Start / stop key

Key for selecting the working temperature - Setpoint 1, 2, 3

Key for selecting the warning and safety values

MENU button - for selecting the menu functions

Cursor keys (left or right)

Edit keys (increase or decrease)

Page 16

Operating controls and functional elements

5.1

XXXXX

S xxxxx FL GOOD

XXXXX

S xxxxx R 005

Enter key 1) Store value / parameter

2) Next lower menu level

Escape key 1. Cancel entries

2. Return to a higher menu level

VFD COMFORT-DISPLAY

Header: Control indicators see sections 2.1 and 2.2 Line 1: Actual value internal or external

The display is depending on the selected control mode in the

menu > Control < (internal or external). Line 2: Working temp. setpoint, constantly S xxx.xx Line 3: Actual value (E = external or I = internal)

Alternating with the display in line 1

Use the keys functions of these keys are different with the programmer started. PI Capacity in % - with manipulated variable set to >control<* or PS Capacity in % - with manipulated variable set to >SERIAL<* or >EPROG<* F Flow rate in liters/minute (providing EPROG input set to >FLOWRATE<)

*see 9.3.5. ACTVAR - page 43 FL Status indication for flow >GOOD< = Pump switched on

R Resistifity measurement and actual value display in the range from

0.5 ... 5 MOhm/cm

Press

Control indicators in the header: Heating / Cooling / Alarm /

to return to actual value (E = external or I = internal)

to indicate further values in line 3. However, the

5.2

5.3

Filling level indication

Handle

Filling opening

Remote control

Control indicators in the header:

Temperature indication Internal or External actual value Temperature indication in °C (°F not possible on this unit)

Display for the adjusted pump pressure stage.

Adjustable via the

Manometer (feed pressure)

Venting grid, removable (only air cooled recirculating cooler)

button, in the menu >PUMP<.

Page 17

Rear view 12

Interface RS232: remote control via personal computer

RS232

Option: Electronic module

Alarm output (for external alarm signal)

ALARM

Standby input (for external emergency switch-off)

STAND-BY

Programmer input and temperature recorder output

REG+E-PROG

Socket for external measurement and control sensor or external setpoint programming

ext Pt100

2 Connectors for solenoid valve. 230 V / max. 0.1 A

No control voltage in the -OFF- condition

Recirculating Cooler

2 Safety cutouts: Mains fuses 16 A

Motor protection circuit breaker for compressor motor

21 Mains power cable with plug

Pump connectors: 3/4” NPT male

OUT / Feed IN / Return

Overflow connector, M10x1 female

Order-No. 8 970 460 Barbed fitting for tubing 8 mm inner dia.

 Closable when using e.g. 3M Fluorinert

Discharge nozzle with cap nut, Connection: ½ " male

Recommendation:

Before filling please install a drain cock at the discharge nozzle. (not included in delivery)

as temperature liquid.

Order-No. 8 920 100 Drain cock, stainless steel

Only for water cooled models: Cooling water OUTLET and INLET

Page 18

Safety notes for the user

4. Safety notes for the user

4.1. Explanation of safety notes

In addition to the safety warnings listed above, warnings are posted throughout the manual. These warnings are designated by an exclamation mark inside an equilateral triangle. “Warning of a dangerous situation (Attention! Please follow the documentation).” The danger is classified using a signal word. Read and follow these important instructions.

Warning:

Describes a possibly highly dangerous situation. If these instructions are not followed, serious injury and danger to life could result.

Caution:

Describes a possibly dangerous situation. If this is not avoided, slight or minor injuries could result. A warning of possible property damage may also be contained in the text.

Notice:

Describes a possibly harmful situation. If this is not avoided, the product or anything in its surroundings can be damaged.

4.2. Explanation of other notes

Note!

Draws attention to something special.

Important!

Indicates usage tips and other useful information.

4.3. Safety instructions

Follow the safety instructions to avoid personal injury and property damage. Also, the

valid safety instructions for workplaces must be followed.

 Only connect the unit to a power socket with an earthing contact (PE – protective

earth)!

 The power supply plug serves as a safe disconnecting device from the line and

must always be easily accessible.

 Place the unit on an even surface on a base made of nonflammable material.

 Do not stay in the area below the unit.

 Make sure you read and understand all instructions and safety precautions listed in

this manual before installing or operating your unit.

 Set the excess temperature safety installation at least 25 °C below the fire point of

the bath fluid.

 Never operate the unit without bath fluid in the bath.

 Pay attention to the thermal expansion of bath oil during heating to avoid

overflowing of the fluid.

 Prevent water from entering the hot bath oil.

Page 19

Recirculating Cooler

 Do not drain the bath fluid while it is hot!

Check the temperature of the bath fluid prior to draining (e.g., by switching the unit on for a short moment).

 Use suitable connecting tubing.

 Avoid sharp bends in the tubing, and maintain a sufficient distance from

surrounding walls.

 Make sure that the tubing is securely attached.

 Regularly check the tubing for material defects (e.g., for cracks).

 Never operate damaged or leaking units.

 Always turn off the unit and disconnect the mains cable from the power source

before performing any service or maintenance procedures, or before moving the unit.

 Always turn off the unit and disconnect the mains cable from the power source

before cleaning the unit.

 Always empty the bath before moving the unit.

 Transport the unit with care.

 Sudden jolts or drops may cause damage in the interior of the unit.

 Observe all warning labels.

 Never remove warning labels.

 Never operate units with damaged mains power cables.

 Repairs are to be carried out only by qualified service personnel.

 Some parts of the bath tank and the pump connections may become extremely

hot during continuous operation. Therefore, exercise particular caution when

The following questions should help to recognize possible dangers and to reduce the

touching these parts.

Caution:

The unit may be used, for example, to control the temperature of fluids in a reactor. We do not know what substances are contained in these vessels.

Many substances are:

 inflammable, easily ignited, or explosive

 hazardous to health

 environmentally hazardous

i.e.: dangerous The user alone is responsible for the handling of these substances!

risks to a minimum.

 Are all tubes and electrical cables connected and layed?

Note: sharp edges, hot surfaces in operation, moving machine parts, etc.

 Do dangerous vapors or gases develop during heating?

Must the work be done in a fume hood?

 What to do when a dangerous substance was spilled on or in the unit?

Before starting to work, obtain information concerning the substance and determine the method of decontamination.

Page 20

Preparations

Notice:

Check the safety installations at least twice a year!



 Excess temperature protection according to IEC 61010-2-010

With a screwdriver, turn back the adjustable excess temperature protection until the shutdown point (actual temperature).

 Low level protection according to IEC 61010-2-010

To check the function of the float, it can be manually lowered with a screwdriver, for example.

5. Preparations

5.1. Installation

 Place the unit in an upright position.

For better stability, apply the holding brakes on the front casters.

 The place of installation should be large enough and provide

sufficient air ventilation to ensure the room does not warm up excessively because of the heat the instrument rejects to the environment. (Max. permissible ambient temperature: 35 °C). For a fault (leakage) in the refrigeration system, the standard EN 378 prescribes a certain room space to be available for each kg of refrigerant. The refrigerant quantity is specified on the type plate. > For 0.52 kg of refrigerant R404A, 1 m

 Keep at least 20 cm of open space on the front and rear venting

grids.

 Do not set up the unit in the immediate vicinity of heat sources

and do not expose to sun light

 Before operating the unit after transport, wait about one hour after

installation. This will allow any oil that has accumulated laterally during transport to flow back down, thus ensuring that the compressor can develop its maximum capacity.

Recommendation:

Before filling please install a drain cock at the discharge nozzle. (25) Connection: ½ " male (not included in delivery)

Order-No. 8 920 100 Drain cock, stainless steel

of space is required.

Cooling water connection (26)

Only for water cooled models Ensure circulation of cooling water by connecting the tubing to cooling water inlet and outlet on the rear of the recirculating cooler. Cooling water connectors G3/4” male

Cooling water temperature <20 °C Cooling water see page 14

Page 21



5.2. Connecting the external system

3/4" NPT male

Recirculating Cooler

Connect the tubing for cooling the external

system to the pump connectors (22, 23) for feed and return on the rear of the recirculating cooler.

 In case the system to be cooled is located at

a higher level than the recirculating cooler, take note of bath liquid flowing back when the unit is switched off. Should the filling volume of the bath tank not be sufficient, prevent the liquid from flowing back by using shut-off valves.

Flood hazard!

For this reason, solenoid valves for loop circuit or shut-off valves can be integrated in the loop circuit.

 Connect the valve to the connector (19).

Order No. Description 8980705 Solenoid valve set 230V/50-60Hz

 Unscrew the collar nut from the overflow connector (24).

Connect a piece of tubing to the overflow connector and drain into a suitable vessel. Order-No. 8 970 460 Barbed fitting for tubing 8 mm inner dia.

 If easily volatile temperature liquids are used, as e.g. 3M

Fluorinert ®, the overflow should remain closed.

Attention Flood hazard!

Then the level indication (6) should get more attention.

Caution:

Securely attach all tubing to prevent slipping.

Page 22

Preparations

5.2.1. Tubing Recommended tubing:

Maximum pressure

Textile-reinforced tubing > 4.5 bar

Warning: Tubing:

At high working temperatures, the tubing used for temperature control and for the cooling water supply represents a danger source. A damaged tubing line may allow a large amount of hot bath fluid to be pumped out within a short time.

This may result in:

 Burning of skin  Breathing difficulties due to hot atmosphere

Safety instructions

 Use suitable connecting tubing.  Make sure that the tubing is securely attached.  Avoid sharp bends in the tubing and maintain a sufficient distance from

surrounding walls.

 Regularly check the tubing for material defects (e.g., for cracks), at least once a

year.

 Preventive maintenance: replace the tubing from time to time.

5.2.2. Bath fluids

Caution:

Carefully read the material safety data sheet of the bath fluid used, particularly with

regard to the fire point!

If a bath fluid with a fire point of  65 °C is used, only supervised operation is possible.

Water:

The quality of water depends on local conditions.  Due to the high concentration of lime, hard water is not suitable for temperature

control because it leads to scale in the bath

 Ferrous water can cause corrosion, even on stainless steel.  Chlorinated water can cause pitting corrosion.  Distilled water and deionized water are unsuitable. Their special properties

cause corrosion in the bath, even on stainless steel.

Page 23

Recirculating Cooler

Recommended bath fluids:

Bath fluid Temperature range

soft/decalcified water 5 °C to 80 °C

Caution:

Fire or other dangers when using bath fluids that are not recommended:

ATTENTION: The maximum permissible viscosity is 30 mm

Please contact JULABO before using other than recommended bath liquids.

JULABO assumes no liability for damage caused by the selection of an unsuitable bath fluid. Unsuitable bath fluids are fluids which, e.g.,  are highly viscous

(much higher than 30 mm2 x s-1 at the respective working temperature)

 have a low viscosity and have creep characteristics

 have corrosive characteristics or  tend to crack.

No liability for use of other bath fluids!

See website for list of recommended bath fluids.

Contact: see page 6

5.3. Filling

Notice:

 Pay attention to the thermal expansion of bath oil during heating to avoid

Liquid level

overflowing of the liquid.

 Connect the tubing from the external system to the pump connectors

and check for leaks.

 Check to make sure that the drain port (25) is closed.

 Remove the cap from the filling opening (9).

 Fill the bath tank using a funnel while monitoring the filling level (6).

Filling of the external system

 Turn the mains switch (1) on

 Press the key

Make sure that air can evacuate from the system..

 Check the filling level (6) and keep on filling the bath liquid using the

funnel.

 After having finished the filling process, the liquid level should be

below “MAX”.

 Close the filling opening.

for filling the cooling loop for the external system.

Page 24

Preparations

5.4. Draining

Notice:

 Do not drain the bath fluid while it is hot or cold!

 Store and dispose of the used bath fluid according to the environmental

Check the temperature of the bath fluid prior to draining (by switching the unit on for a short moment, for example).

protection laws.

 Turn the mains switch (1) off.

 Place a suitable vessel for accepting the used bath liquid

underneath the drain.

 Unscrew the cup nut (A) from the drain port (25) and

empty the unit completely.

 Close the drain port.

Page 25

6. Operating procedures

6.1. Power connection

Caution:

 Only connect the unit to a power socket with an earthing contact (PE – protective

6.2. Switching on / Start - Stop

earth)!

 The power supply plug serves as a safe disconnecting device from the line and

must always be easily accessible.

 Never operate the unit with a damaged mains power cable.  Regularly check the mains power cables for damage.

 We disclaim all liability for damage caused by incorrect line voltages!

Make sure that the line voltage and frequency match the supply voltage specified on the type plate. Deviations of ±10 % are permissible.

Recirculating Cooler

-OFF-

S 150.0 I 24.6

XXXXX

95xxxxx

-xxPxHx

Switching on:

 Turn on the mains power switch (1).

 During the self-test all segments of the VFD-Info-Display light up.

Then the software version number (example: V 4x.1x) and the order number of the recirculating cooler appears. (Example: [ 95 20 025 03 P3H1 ] ).

The display „OFF“ or „R OFF“ indicates the unit is ready to operate.

 The recirculating cooler enters the operating mode activated before

switching the recirculating cooler off:

keypad control mode (manual operation)

remote control mode (operation via personal computer).

Start: Press the start/stop key

The actual bath temperature is displayed on the VFD COMFORTDISPLAY.

Stop: Press the start/stop key

The VFD COMFORT-DISPLAY indicates the message „OFF“.

Autostart: see chapter 9.3.2. A-START – Autostart

The Autostart function enables the start of the recirculating cooler directly by pressing the mains switch or using a timer.

Page 26

Setting the temperatures

7. Setting the temperatures

Factory settings: SETP 1 25 °C SETP 2 37 °C SETP 3 70 °C

XXXXX

SETP 3

70.

XXXXX

SETP 3

85.

Press the

3 different working temperatures are adjustable. Their values are freely selectable within the operating temperature range.

key to call up the menu for temperature selection.

 This setting may be carried out with the recirculating cooler being in the

Start or Stop condition!

Example: Setting working temperature "SETPoint 3"

1. Press the key until the desired menu window is indicated on the

VFD COMFORT-DISPLAY Example: SETP 3 / 70.0 °C (last digit blinks)

2. Change the value to 85 °C.

Use the cursor keys numeral you wish to change blinks.

Use the increase/decrease arrows numeral (-, 0, 1, 2, 3, ... 9). see example left: SETP 3 / 85.0.

to move left or right on the display until the

to change the selected

3. Press enter to store the value.

 In the >Start< condition this value is immediately used for controlling the

working temperature. The indication on the VFD COMFORT-DISPLAY is updated. The heater control indicator blinks.

Notice: See SETMAX and SETMIN in chapter 9.5. MENU LIMITS



SETP 1 SETP 2 SETP 3

Example: Selecting the working temperature

1. Press the key until the desired menu item is indicated on the VFD

COMFORT-DISPLAY.

2. Press enter .

 The recirculating cooler uses the new working temperature value for

temperature control.

Page 27

8. Safety installations, warning functions

Check the safety installation at least twice a year! See page 20

Settings for the excess temperature protection > SAFETMP< according to IEC 61010-2-010 and for the high > OVERTMP< and low> SUBTMP<

 SAFETMP

 OVERTMP

 SUBTMP

 LIMITSR

8.1. Excess temperature protection

temperature warning functions are made in a menu that is called up with the

key

Menu item > LIMITSR <: „Warning“ or „Alarm“ For the two menu items > OVERTMP< and >SUBTMP< choose between a warning message being signalled or a complete shutdown of the main functional elements such as heater and circulating pump being effected.

Recirculating Cooler

XXXXX

LARM

CODE 1

XXX.X

SAFETMP 10

This safety installation is independent of the control circuit. When the temperature of the bath fluid has reached the safety temperature, a complete shutdown of the heater and pump is effected.

The alarm is indicated by optical and audible signals (continuous tone) and on the VFD COMFORT-DISPLAY appears the error message "ALARM-CODE 1".

Setting range: 20 °C ... 220 °C

1. Press the button until the menu item > SAFETMP < is

displayed.

160

240

3200

°C

2. Set the new cut-out value using a screwdriver via the VFD

COMFORT-DISPLAY (Example: 100 °C)

3. Press to update the display immediately, or the unit

automatically returns to the effective display after

about 30 seconds

Recommendation: Set the excess temperature protection at 5 to 10 °C above the working

temperature setpoint.

Warning:

The excess temperature protection >SafeTemp< should be set at least 25 °C below the fire point of the bath fluid used. There is a risk of fire in the event of a wrong setting! We disclaim all liability for damage caused by wrong settings!

Page 28

Safety installations, warning functions

8.1.1. Early warning system, low level protection

This low level protection is independent of the control circuit and is divided in two sections.

(patented)

1. Switch in stage 1 recognizes a critical fluid level An audible warning (interval tone) sounds and a message

appears on the VFD COMFORT-DISPLAY.

.

XXXX

ARNIN ODE 4

2. Switch in stage 2 recognizes a low fluid level

If stage 2 of the low level protection device (according to IEC 61010-2-010) is triggered, a complete shutdown of the heater and circulating pump is effected. A continuous alarm tone sounds and a message >ALARM< >CODE 01< appears on the VFD COMFORT-DISPLAY.

Refill bath fluid!

.

XXXX

Important: Check the safety installations from time to time.

See page 20

Warning:

When adding bath fluid, always use the same bath fluid type that is already in the bath. Bath oils must not contain any water and should be pre-heated approximately to the current bath temperature! Explosion hazard at high temperatures!

LARM ODE 1

Turn off the unit with the mains switch, refill bath fluid and turn the unit on again!

Page 29

8.2. Over and Sub temperature warning functions

Recirculating Cooler

Over temperature

Sub temperature

XXXXX

SUBTMP

-94.9

If for a sensitive temperature application task adherence to a working temperature value > SETP < is to be supervised, then set over and sub temperature warning values. In the example below, the > SETP < of 85 °C is surrounded by the values > OVERTEMP < 87 °C and > SUBTEMP < 83 °C. The electronics immediately registers when the actual temperature attains a temperature out of the limits and it follows a reaction according to what is set in the menu item >LIMITSR<. (see chapter 8.2.1. Change-over of the warning function to shutdown function)

XXXXX

SETP

85.0

OVERTMP

87.0

SUBTMP 83,0

1. Press the button until the menu item > OVERTMP < or

>SUBTMP< is displayed.

2. Set value:

Use the cursor keys to move left or right on the display until the numeral you wish to change blinks.

Use the increase/decrease arrows numeral (-, 0, 1, 2, 3, ... 9).

to change the selected

3. Press enter to store the value.

 The warning functions are only triggered when the actual bath

temperature, after start from the „OFF“ or „rOFF“ mode, lies within the set limits for 3 seconds.

Recommendation:

Set the high temperature warning value > OVERTMP < at 5 °C to 10 °C above the working temperature setpoint.

Set the low temperature warning value > SUBTMP < at 5 °C to 10 °C below the working temperature setpoint.

Page 30

Safety installations, warning functions

8.2.1. Change-over of the warning function to shutdown function

Factory setting: >WARNING<



For the two menu items > OVERTMP< and >SUBTMP< choose between a warning message being signalled or a complete shutdown of the main functional elements such as heater and circulating pump being effected (see page 29).

 Setting >WARNING<

An audible warning (interval tone) sounds and a meassage appears on

the VFD COMFORT-DISPLAY.

XXXXX

WARNING CODE 03

OVERTMP SUBTMP

 Setting >ALARM<

A complete shutdown of heater and circulating pump is effected.

An audible alarm (continuous tone) sounds and a message appears on

the VFD COMFORT-DISPLAY.

XXXXX

LARM

CODE 03

OVERTMP SUBTMP

oer

XXXX

ARNIN ODE 04

XXXX

LARM ODE 04

1. Press the button until the menu item >LIMITSR< is displayed.

2. Select the parameter with the keys .

(>WARNING< or >ALARM<)

3. Press enter to store the selected parameter.

Page 31

9. Menu functions

The term „menu functions“ refers to adjustments such as

 PUMP

Electronically adjustable pump capacity page 32

Recirculating Cooler

 CONTROL

 CONFIG

 SERIAL

 LIMITS

Intelligent Cascade Control, control parameters page 33 CONTROL - internal or external control ELFTUNING DYNAMIC - internal COSPEED - external Control parameters - XP, TN, TV internal Control parameters - XP, TN, TV, XPU external

Configurationen of the unit page 39 SET (Setpoint) – keypad control or remote control A-START – Autostart OFF MODE – Motor on / off RESET – Factory settings ACTVAR – actuating variable TIME / DATE – Setting time and date

Adjustable interface parameters page 45 BAUDRAT, H-SHAKE, PARITY (Baud rate, Handshake, Parity)

Limits to temperature or capacity page 46 SET MAX / MIN - Maximum and minimum setpoint HEAT MAX - Adjusted maximum heating COOL MAX - Adjusted maximum cooling INTERN MAX / MIN – Limitation of the working temperature range BAND HIGH / LOW – Band limit

 PROGRAM

 ADJUST

 ANALOG

Indication only when the Analog Interface Modul is mounted.

Integrated programmer page 48

ATC - Absolute Temperature Calibration, page 52 Sensor calibration, 3-point calibration

Analog inputs/outputs page 56 F-ALARM – Function at Alarm A-ALARM – Type of Alarm EX-STBY - STAND-BY input CHANNEL – Output 1, 2, 3 EPROG – External programmer input

Page 32

Menu functions

 Menu level 1:

Example: Menu level 1

Continue: Press to quit the menu.

Legend:

Continue: Press

/ or

Press the button to scroll in menu level 1. If the desired () menu item is indicated on the VFD COMFORT-

DISPLAY, press enter

 Menu level 2:

Press the display blinks.

If a value is set or a parameter selected, press enter

Each input can be cancelled with the the next higher menu level.

The display remains visible for approx. 30 seconds within this period,

or press the or press

button to scroll in the selected menu item, line 3 of the

button to scroll in the menu level

to return to the next higher menu level.

to change to menu level 2.

9.1. MENU PUMP - Setting the pump pressure

to confirm.

. The cursor then returns to

. Start to set a value

Examples:

XXX.X

PUMP 2

The pressure of the circulating pump is adjustable in stages. After setting, the VFD COMFORT-DISPLAY indicates the corresponding value.

Adjustable pump capacity stage 1 ... 3

Illuminated display:

for pump pressure

 Display for the adjusted pump pressure stage.

1. Press the button until the menu item > MENU / PUMP < is

displayed.

2. Press enter to indicate the parameter.

3. Select the parameter with the keys (1 ... 3).

4. Press enter to store the selected parameter.

Continue: Press

Notice:

Pump capacity: See Table 1 page 12

or .

Page 33

9.2. MENU CONTROL – Control parameters

CONTROL: Press enter to switch to menu level 2

>CONTROL< (INT /

EXT

Recirculating Cooler

)

>SELFTUN< (ALWAYS / OFF / ONCE)

>DYNINT< (APER / NORM)

>XP INT< (0.1 ... 99.9)

>TN INT< (3 ... 9999)

>TV INT< (0 ... 999)

>CONTROL< (

>SELFTUN< (ALWAYS / OFF / ONCE)

>COSPEED< (0 ... 5)

>XP EXT< (0.1 ... 99.9)

>TN EXT< (3 ... 9999)

> TV EXT (0 ... 999)

>XPU EXT< (0.1 ... 99.9)

/ EXT)

INT

9.2.1. CONTROL – internal / external control

The recirculating cooler is conceived for internal and external temperature control. Switching is carried out in this submenu. Depending on what is set, only the respective set of parameters is

Factory setting: INT

indicated.

Possible parameters:

INT internal temperature control EXT external temperature control with external Pt100 sensor

 The control type can only be adjusted in the -OFF- condition

Page 34

Menu functions

1. Press the button until the submenu >CONTROL< is displayed.

2. Select the parameter with the keys (INT / EXT).

3. Press enter to store the selected parameter.

Continue: Press

Notice:

Place the external sensor into the bath medium and securely fix the sensor.

IMPORTANT:

Additional measures for external temperature control.

Pt100

 For external control and temperature measurement an external

Pt100 sensor must be connected to the socket (17) on the rear of the recirculating cooler.

 .Suggested adjustments for external temperature control:

BAND HIGH / LOW and INTERN MAX / MIN

see chapter > LIMITS < on page 46.

 Sensor calibration of the external Pt100 sensor is carried out in the

>MENU / ADJUST<, in the submenu >ATC SEN / EXT< (see page 52).

Accessory: Pt100 external sensor

Order No. Description Material Cable 8981003 200x6 mm Ø, stainless steel 1.5 m

8981005 200x6 mm Ø, glass 1.5 m 8981006 20x2 mm Ø, stainless steel 1.5 m 8981010 300x6 mm Ø, stainless steel 1.5 m 8981015 300x6 mm Ø, stainless steel / PTFE coated 3 m 8981013 600x6 mm Ø, stainless steel / PTFE coated 3 m 8981016 900x6 mm Ø, stainless steel / PTFE coated 3 m 8981014 1200x6 mm Ø, stainless steel / PTFE coated 3 m 8981103 Extension cable for Pt100 sensor 3.5 m 8981020 M+R in-line Pt100 sensor

Pt100 M+R

The M+R in-line Pt100 sensor is a flow sensor and can be installed loop

circuit

Page 35

9.2.2. SELFTUNING

Recirculating Cooler

XXXXX

SELFTUN ALWAYS

Factory setting: ONCE

Selftuning:

When performing a selftuning for the controlled system (temperature application system), the control parameters Xp, Tn and Tv are automatically determined and stored.

Possible parameters:

OFF - no

The control parameters ascertained during the last identification are used for control purposes.

ONCE - single

The instrument performs a single selftuning of the controlled system

after each start with the start/stop key command via the interface.

ALWAYS - continual

The instrument performs a selftuning of the controlled system whenever a new setpoint is to be reached. Use this setting only when the temperature application system changes permanently.

selftuning

selftuning (factory setting)

or after receiving a start

selftuning

1. Press the button until the submenu > SELFTUN < is displayed.

2. Select the parameter with the keys .

(ALWAYS / OFF / ONCE)

3. Press enter to store the selected parameter.

Continue: Press

Page 36

Menu functions

9.2.3. DYN INT - Dynamic internal

This parameter affects the temperature pattern only in case of

internal control.

Factory setting: APER (aperiodic)

°C

NORM

temp. stability

PER

Setpoint

NORM

temp. stability

PER

temperature ramp

1. Press the button until the submenu > DYN INT < is displayed.

Possible parameters:

NORM Allows for reaching the setpoint faster, but

overshooting of up to 5 % is possible.

APER Target temperature is attained without

overshooting.

 With both adjustments an adequate temperature

stability is reached after approximately the same time.

2. Select the parameter with the keys .

(NORM / APER)

3. Press enter to store the selected parameter.

Continue: Press

9.2.4. Control parameters – XP, TN, TV internal

Setting range:0.1 ... 99.9

Setting range:1 ...9999

The control parameters preset in factory are in most cases adequate for achieving an optimum temperature pattern for the samples requiring temperature application. Each parameter may be manually set via the keypad if necessary, to allow optimum control performance.

Proportional range >Xp<

The proportional range is the range below the selected temperature value in which the control circuit reduces the heating power from 100 % to 0 %.

Resetting time >Tn< (Integral component)

Compensation of the remaining control deviation due to proportional regulation. An insufficient resetting time may cause instabilities to occur. Excessive resetting time will unnecessarily prolong compensation of the control difference.

Page 37

Setting range: 0 ... 999

Recirculating Cooler

Lead time >Tv< (Differential component)

The differential component reduces the control settling time. An insufficient lead time will prolong the time required to compensate for disturbance effects and cause high overshooting during run-up. An excessive lead time could cause instabilities (oscillations) to occur.

1. Press the button until the desired submenu is displayed -

XP INT, TN INT, TV INT.

2. Set value:

Use the cursor keys the numeral you wish to change blinks.

Use the increase/decrease arrows numeral (-, 0, 1, 2, 3, ... 9).

to move left or right on the display until

3. Press enter to store the value.

Continue: Press

Optimization instructions for the PID control parameters:

optimum setting

°C

/ or

The heat-up curve reveals inappropriate control settings.

to change the selected

Inappropriate settings may produce the following heat-up curves:

Xp too low

°C

Xp too high or Tv too high

°C

Tv/Tn too high or Xp too high

°C

Tv/Tn too low

Page 38

Menu functions

9.2.5. COSPEED - external

This parameter affects the temperature pattern only in case of control.

Possible parameters:

1. Press the button until the submenu > COSPEED < is

displayed.

2. Set value:

Use the cursor keys the numeral you wish to change blinks.

Use the increase/decrease arrows numeral (-, 0, 1, 2, 3, ... 9).

0.0 ... 5.0

to move left or right on the display until

to change the selected

external

3. Press enter to store the value.

Continue: Press

During selftuning, the control parameters Xp, Tn and Tv of a controlled system are automatically determined and stored. Depending on the controlled system, time for tuning can be unequally longer. This controller layout allows protection of sensitive objects requiring temperature application.

/ or

°C

Int. temperature

Ext. temperature

Setpoint

As soon as a co-speed factor is set, it is considered for calculating the control parameters. As shown in the diagram, tuning times become shorter the higher the co-speed factor is, but overshooting can happen in the internal system.

Page 39

9.2.6. Control parameters – XPU, XP, TN, TV external

Recirculating Cooler

Setting range: 0.1 ... 99.9

Setting range: 1 ...9999

Setting range: 0 ... 999

Setting range: 0.1 ... 99.9

1. Press the button until the desired submenu is displayed -

XP EXT, TN EXT, TV EXT, XPU EXT.

2. Set value:

 Use the cursor keys to move left or right on the display

until the numeral you wish to change blinks.

 Use the increase/decrease arrows to change the

selected numeral (-, 0, 1, 2, 3, ... 9).

3. Press enter to store the value.

Continue: Press

Proportional range >Xpu<

The proportional range Xpu of the cascaded controller is only needed for external control.

/ or

9.3. MENU CONFIG - configuration

CONFIG: Press enter to switch to menu level 2

Keypad control or remote control

Autostart on / off

Motor on / off

ACTuating VARiable

EPROG* Indication only when electronic module is mounted.

>SETP< (KEY / SERIAL / PT100 / EPROG*)

>A-START< (OFF / ON)

>OFFMODE< (PMP OFF / PMP ON)

>RESET< ( NO / YES ) Factory settings

>ACTVAR< (CONTROL / SERIAL / EPROG* )

>TIME< (hh : mm ) Setting time

>DATE< (TT/MM.JJ ) Setting date

Page 40

Menu functions

9.3.1. SETPOINT – Keypad control or remote control

The recirculating cooler provides four possibilities for setpoint setting.

1. Press the button until the submenu > SETP < is displayed.

Factory setting: KEY

The selected mode is indicated on the VFD COMFORT-DISPLAY

-OFF-

S XX.X I XX.X

KEY

-OFF-

S XX.X

SERIAL

-OFF-

ST XX.X I XX.X

PT100

-OFF-

SP XX.X I XX.X

EPROG

2. Select the parameter with the keys

(KEY / SERIAL / PT100 / EPROG)

3. Press enter to store the selected parameter.

Continue: Press

KEY – Setpoint setting with the keys and

or the integrated programmer.

SERIAL - Setpoint setting via the serial RS232 interface through a PC

or superordinated data system.

Important:

Connect the recirculating cooler to a PC using an interface cable. Check the interface parameters of both interfaces (on recirculating cooler and PC) and make sure they match. (see chapter 12.1. Setup for remote control page 66)

PT100 - Setpoint setting via the analog socket „ext. Pt100“ using an

external temperature sensor or an appropriate voltage/current source.

EPROG - Can only be adjusted when an electronic module with analog

connections is used (option). Setpoint setting via the analog interface REG+E-PROG connection with an external voltage or current source or a programmer.

Important:

Connect the external voltage or current source or a programmer to the circulator via the socket REG+E-PROG (see page 59). In the menu >MENU ANALOG< set the parameter >EPROG< and the input variables (see page 60).

The E-Prog input can only be used either under menu item > SETP < or under menu item > ACTVAR <

(see page 43).

/ or

Page 41

9.3.2. A-START – Autostart

Recirculating Cooler

XXXXX

-START

OFF

Factory setting: OFF

Warning:

For supervised or unsupervised operation with the AUTOSTART function, avoid any hazardous situation to persons or property. The instrument does no longer conform to N.A.M.U.R. recommendations.

The AUTOSTART function (automatic start mode) is allowing the start of the instrument directly by pressing the mains power switch or using a timer.

1. Press the button until the submenu > A-START < is displayed.

2. Select the parameter with the keys (OFF / ON).

3. Press enter to store the selected parameter.

Continue: Press

Possible parameters:

ON - AUTOSTART on OFF - AUTOSTART off

Note:

The temperature system has been configured and supplied by JULABO according to N.A.M.U.R. recommendations. This means for the start mode, that the unit must enter a safe operating state after a power failure (non-automatic start mode). This safe operating state is indicated by

OFF, resp. R OFF on the VFD COMFORT-DISPLAY. A complete

shutdown of the main functional elements such as heater and circulating pump is effected simultaneously.

The values set on the recirculating cooler remain stored, and the unit is returned to operation by pressing the start/stop key (in manual control mode). In remote control mode, the values need to be resent by the PC via the interface. Should such a safety standard not be required, the AUTOSTART function (automatic start mode) may be activated, thus allowing the start of the instrument directly by pressing the mains power switch or using a timer.

The AUTOSTART function can only be used, if setpoint setting is carried out via > KEY <, > EPROG < or >PT100<.

/ or

The safety and warning functions of the instrument should always be used to their fullest capacity.

Page 42

Menu functions

9.3.3. OFF-MODE – Pump motor on / off

XXXXX

OFFMODE PMP OFF

Factory setting: PMP OFF

Normally the circulating pump is switched via the start/stop signal. However, if circulation should be maintained also for the -OFF- condition, the parameter >

Possible parameters:

PMP ON Pump motor on PMP OFF Pump motor off

PMP ON< needs to be set.

1. Press the button until the submenu > OFFMOD < is displayed.

2. Select the parameter with the keys .

(PMP ON / PMP OFF)

3. Press enter to store the selected parameter.

Continue: Press

/ or

 In case of an alarm state, a shutdown of the pump motor is still

effected.

9.3.4. RESET – Factory settings

Use this to reset all values to factory setting (except date and time).

A RESET can only be carried out in the -OFF- condition.

Factory setting: NO

Possible parameters:

NO / YES

1. Press the button until the submenu > RESET < is displayed.

2. Select the parameter with the keys (NO / YES).

3. Press enter to store the selected parameter.

 As long as the message -RUN- appears all parameters a reset to

factory settings.

Page 43

9.3.5. ACTVAR - actuating variable

Recirculating Cooler

XXXXX

CTVAR

CONTROL

Factory setting: CONTROL

XXXXX

CTVAR

SERIAL

XXXXX

CTVAR

EPROG

The variable the heater or cooling machine of the recirculating cooler is controlled. Heat or cold is applied to the bath according to this variable. If this happens with the control electronics of the recirculating cooler, called > CONTROL < in this particular case, the bath temperature is exactly heated and maintained constant at the adjusted setpoint.

(ACTuating VARiable) corresponds to the extent to which

 Programming of variables for the parameters > SERIAL < or >

EPROG < is only accepted, if the unit is in Start mode.

1. Press the button until the submenu > ACTVAR < is displayed.

2. Select the parameter with the keys

(CONTROL / SERIAL / EPROG )

3. Press enter to store the selected parameter

Continue: Press

Possible parameters:

CONTROL – The internal control electronics of the recirculating cooler

controls the heater and cooling machine. Self-tuning is possible.

SERIAL – The heater or cooling machine receives the control signal via

the serial interface. Self-tuning is not possible.

EPROG - The heater or cooling machine receives the control signal via

the E-Prog input. Self-tuning is not possible.

Important:

Under >MENU ANALOG< set the input variable to >EPROG x / ACTVAR< (see page 60).

XXXXX

EPROG U

CTVAR



/ or

Example: EPROG U / ACTVAR

Note:

The E-Prog input can only be used either under menu item

SETP < (page 40) or under menu item > ACTVAR <.

Page 44

Menu functions

Warning:

The working temperature range of the recirculating cooler is determined during configuration. If set to >CONTROL<, this range cannot be exceeded.

If set to > SERIAL < and > EPROG <, heat or cold is applied to the bath without

control. The permissible maximum temperature can be exceeded. The user has to take adequate precautions for temperature control. Materials, such as gaskets or insulations for example, may be damaged or destroyed, if the permissible maximum temperature is exceeded.

The safety and warning functions of the instrument should always be used to their fullest capacity.

8. Safety installations, warning functions page 27

9.3.6. TIME / DATE – setting time and date

XXXXX

The integrated clock allows starting a profile at any date and time. The clock is preset in the factory.

TIM 16h4317

hh mm

XXXXX

DAT 10/1203

TT/MM.JJ

1. Press the button until the submenu > TIME < or > DATE < is

displayed.

2. Setting time / date:

Use the cursor keys the numeral you wish to change blinks.

Use the increase/decrease arrows numeral (-, 0, 1, 2, 3, ... 9).

3. Press enter to store the value.

Continue: Press

 Clock: Only hours and minutes are set.

Settings are checked for plausibility.

to move left or right on the display until

to change the selected

/ or

Page 45

9.4. MENU SERIAL - BAUDRATE, HANDSHAKE, PARITY

XXXXX

MENU SERIAL

Factory settings: 4800 Bauds even hardware handshake

For communication between recirculating cooler and a PC or a superordinated process system the interface parameters of bath units must be identical.

SERIAL: Press enter to switch to menu level 2

>BAUDRAT<

>PARITY<

>H-SHAKE<

Recirculating Cooler

1. Press the button until the desired menu item is displayed.

2. Select the parameter with the keys .

3. Press enter to store the selected parameter.

Continue: Press

Adjustable interface parameters BAUDRATE 4800 bauds

9600 bauds

PARITY no

odd even

/ or

HANDSHAKE

SOFT = software handshake HARD = hardware handshake

Data bits = 7; Stop bits = 1

Page 46

Menu functions

9.5. MENU LIMITS

XXXXX

ENU

LIMIT

LIMITS: Press enter to switch to menu level 2

>SET MAX<

>SET MIN<

>HEATMAX<

>COOLMAX<

>INT MAX<

>INT MIN<

>BAND H<

>BAND L<

In case of external control these menu items are additionally indicated.

1. Press the button until the desired submenu is displayed

2. Set value:

Use the cursor keys the numeral you wish to change blinks.

Use the increase/decrease arrows numeral (-, 0, 1, 2, 3, ... 9).

to move left or right on the display until

to change the selected

Factory settings

XXXXX

SET MA

300.0

XXXXX

SET MIN

-94.9

3. Press enter to store the value.

Continue: Press

SETPOINT MAX / MIN - Maximum and minimum setpoint

Restriction for the adjustable temperature range.

The limitation of the operating temperature range effects the temperature

setting under the menu called up with the It is possible to adjust only working temperatures that lie within the limit range set here. Existing settings for SETP 1, 2, 3 and also for >OVERTEMP< and >SUBTEMP< (see page 29) are automatically defered within the limit range.

Setting range::

-94.99 °C ... +300.0 °C

/ or

key.

Page 47

Recirculating Cooler

Factory settings

XXXXX

INT MA

300.0

XXXXX

INT MIN

-94.9

SAFETMP <

Adjusted maximum heating / cooling.

Heating and cooling powers of the recirculating cooler are adjustable. 100 % corresponds to the values in the technical specifications of the equipment.

Setting range:

HEAT MAX – 0 to 100 % in steps of 1 % COOLING MAX – 0 to 100 % in steps of 1 %

INTERNAL MAX / MIN Limit setting

Setting range: -94.9 °C ... +300.0 °C

The limits INT MAX and INT MIN are only valid for external control. INT MAX and INT MIN are used to limit the expected internal bath temperatures to any upper and lower values. The temperature controller cannot exceed these limits even if it would be required for reaching the temperature in the external system. Consequently the external setpoint may thus not be reached.

Sense of a limit setting:

 Protects the bath fluid from overheating.  Prevents an undesired alarm shutdown by the excess temperature

protection - >

INTMAX:< to a value at least 5 °C below the >SAFETEMP:<

Set > value.

ALARM CODE 14<.

 Protects the pump motor from high viscosity of the bath fluid at low

temperatures.

For recirculating coolers: Freezing protection when using water as

bath fluid.

Factory settings:

BAND HIGH / LOW - Band limit

For the heat-up and cool-down phases different settings to conform to the requirements of the particular application are possible.

Setting range:

Using temperatures in the internal bath and the external system can be limited to any maximum value for the heat-up or the cool-down phase. During the heat-up phase the difference value always adds to the actual external temperature. During the cool-down phase, the difference value is subtracted.

BAND HIGH and BAND LOW, the difference between the

0 ... 200 °C

Page 48

Menu functions

150

°C

Internal bath

external system

Sense of a band limit:

 Ensures gentle heating for the

objects requiring temperature application.

 Protects glass reactors, for

100

BAND HIGH

10 20 30 40 50 60 10 20 30 40 50 60 10

BAND LOW

[min]

example, from thermal shock.

The superordinated to this band limit.

9.6. MENU PROGRAM – Integrated programmer

XXXXX

ENU

PROGRAM

1 Profil

10 Sections (STEP)

99 Repetitions

PROGRAM: Press enter to switch to menu level 2

>PS STEP< Program start at section ....

> PS RUNS < Number of profile repetitions 1 ... 99

> PS GO < Start type (NOW/TIME)

> P TIME < Start time (hh:mm)

>P DATE< Start date (TT/MM.JJ)

INTMAX: and INTMIN: values are

(Standby or last setpoint)

The integrated programmer allows any desired temperature program sequences to be realized. Such a temperature sequence is called profile. A profile consists of individual sections defined by duration (t:) and target temperature. Target temperature is the setpoint (T:), that is achieved at the end of a section. The programmer uses time and temperature difference values within a section to calculate a temperature ramp.

>PS END< Status at the end of the profile (STBY/SETP)

> PE STEP< Edit profile (1 ... 10)

>Px SEP < Target temperature of section ...

>Px TIM< Time period of section ...

>Px DEL< Delete a section (STEP) (YES/NO)

> PE DEL< Delete a profile (YES/NO)

Page 49

Recirculating Cooler

[

]

PE STEP (No.) 1 2 4 6 8

Px SEP (°C) 100 180 180 75 75 Px TIM (hh.mm) 00:20 00.10 00:20 00:50 00:20

200

150

100

Step 1 2 4 6 8

Example:

10 20 30 40 50 60 10 20 30 40 50 60 10

min

1. Press the button until the desired submenu is displayed.

2. Set value:

Use the cursor keys numeral you wish to change blinks.

Use the increase/decrease arrows numeral (-, 0, 1, 2, 3, ... 9).

select the parameter with the keys

to move left or right on the display until the

to change the selected

3. Press enter to store the value / parameter

Continue: Press

Starting a profile

If a profile is stored, the programmer can be started with one of the 3 menu items.

/ or

XXXXX

PS STE 1

XXXXX

PS RUN 1

XXXXX

PS G TIM

>PS STEP< (1 ... 10)

Select the section with which the profile should be started. (STEP) Example: STEP 1

>PS RUNS< (1 ... 99)

Select the number of profile repetitions. Example: RUNS 10 The profile is repeated 10 times.

>PS GO<

The profile can be started immediately with the parameter (NOW), or at the set time with the parameter (TIME). Example below: 19 December 2003 14:25 hrs

Page 50

Menu functions

XXXXX

S XX.X STEP X

S XX.X XXhXXxx

S XX.X XXhxx

S XX.X I xxx.x

S XX.X E xxx.x

S XX.X RU

S XX.X PAUS

The started programmer

The started programmer indicates the actually calculated setpoint S XX.X in line 2. This value increases within the time period >Px TIM< until the target temperature >Px SEP< of the section is reached. If time in a section is set to „0“, the next section starts only as soon as the target temperature is reached.

Use the edit keys of approx. 4 seconds between the valid section (STEP X) and

A Remaining time of the valid section or B Remaining total time: Profile x number of repetitions or C Actual bath temperature

I xxx.x – internal actual value or E xxx.x – external actual value

D RUN – the programmer is started or

PAUSE – the profile was interrupted with the key and the temperature is maintained constant at the last calculated setpoint value.

Continue: Press

Interrupting / Termination of a profile

to scroll in line 3. The display changes in intervals

. Time is stopped

XXXXX

TIME 14h25ss

XXXXX

DATE 19/1203

XXXXX

PS END SETP

 A profile can be terminated by pressing .  Power failure with the programmer started:

– The reaction of the circulator is the same as when switched off and on again with the mains switch. The VFD COMFORT-DISPLAY indicates "OFF". – If the AUTOSTART function is activated, the programmer starts again at a point approx. 20 seconds before the interruption took place. However, an uncontrolled change of the bath temperature happened.

Setting time/date for the start

>TIME<

Enter the start time. Example: 14:25 hrs

>DATE<

Enter the start date. Example: 19 December 2003

 Check the setting of the internal real time clock (see page 44).

Status at the end of the profile

>PS END< (STBY / SETP)

Set the status for the end of the profile. With the parameter With the parameter the value of the last section.

STandBY the circulator enters the –OFF– state. SETPoint the circulator maintains the temperature at

Page 51

Recirculating Cooler

Compiling profiles, indicating sections

Example: Section 2

XXXXX

PE STE

XXXXX

P2 SE

180.

XXXXX

P2 TIM 00h1

1 Press the

1.1 Use the increase/decrease arrows desired section (1, 2, 3, ... 10).

1.2 Press

Menu level 3:

2 Submenu >Px SEP< (SETPOINT)

Set a temperature value: Example: 180 °C

2.1 Use the cursor keys the numeral you wish to change blinks.

2.2 Use the increase/decrease arrows numeral (-, 0, 1, 2, 3, ... 9).

2.3 Press enter

2.4 Continue: Press

3 Submenu >Px TIM< (TIME)

Set a time. Example: 10 minutes.

3.1 Use the cursor keys the numeral you wish to change blinks.

3.2 Use the increase/decrease arrows numeral (-, 0, 1, 2, 3, ... 9).

button until the submenu >PE STEP x< is displayed.

to set the number of the

to enter menu level 3.

to move left or right on the display until

to change the selected

to store new the value.

to move left or right on the display until

to change the selected

XXXXX

P2 DE NO

XXXXX

P1 xxx

---.-

3.3 Press enter

3.4 Continue: Press

4 Submenu >Px DEL< (DELETE)

Standard setting (NO) Set the parameter to YES to delete the values in this section.

4.1 If necessary, use the arrows

and press

5 Press Or

6 Press

to return to submenu >Px SEP< in menu level 3.

to return to submenu >PE STEP x< in menu level 2.

to store new the value.

to set the parameter to YES

 Sections without value or time indication (including the value 0) are

skipped. But they can be integrated in the profile at a later time. Example: Section 1

Deleting a profile

XXXXX

PE DE YES

>PE DEL< (YES/NO)

Set the parameter to YES to delete

all sections >PE STEP / 1 to 10<.

Page 52

Menu functions

9.7. MENU ADJUST – ATC Absolute Temperature Calibration

XXXXX

ENU

ADJUS

ATC serves to compensate a temperature difference that might occur between recirculating cooler and a defined measuring point in the bath tank because of physical properties.

ADJUST: Press enter to switch to menu level 2

(INT)

(ON or OFF) (ON or OFF)

>1- point <-, >2- point <- or >3- point < - calibration

>ATC SEN <

or (EXT)

> ATCSTAT < > ATCSTAT <

>C ART >C ART

> TTEMP 1< > TTEMP 1<

> CTEMP 1< > CTEMP 1<

> TTEMP 2< > TTEMP 2<

> CTEMP 2< > CTEMP 2<

> TTEMP 3< > TTEMP 3<

> CTEMP 3< > CTEMP 3<

1. Press the button until the desired submenu is displayed.

2. Set value /parameter:

Use the cursor keys the numeral you wish to change blinks.

Use the increase/decrease arrows numeral (-, 0, 1, 2, 3, ... 9).

select the parameter with the keys

to move left or right on the display until

to change the selected

3. Press enter to store the value / parameter

Continue: Press

/ or

Page 53

Recirculating Cooler

XXX.X

CT SEN

INT

XXX.X

CT SEN

EXT

XXX.X

TCSTAT

OFF

XXX.X

TCSTAT

ATC SENSOR - INTERNAL / EXTERNAL

In the first submenu the ATC function is set for the >INT< internal or >EXT< external temperature sensor.

Calibration can be carried out for the internal temperature sensor and for the external temperature sensor connected to the socket „ext. Pt100“.

The recirculating cooler is able to store both parameter sets. However, only the one set under this menu item is indicated.

ATC STATUS - ON / OFF

In the second submenu the ATC function for the temperature sensor selected above is activated >ON< or deactivated >OFF<.

>OFF< The controller of the recirculating cooler uses the original curve

of the temperature sensor.

Important: During the calibration process > OFF < needs to be set.

>ON< The controller of the recirculating cooler uses the new calibration

curve.

 In the ATC STATUS > ON<, the ATC calibration curve always affects

the effective working temperature (also the one set via the interface).

Calibration type

XXX.X

C ART x POINT

XXX.X

TTEMP 1 x 80.0

XXX.X

TTEMP x120.0

XXX.X

TTEMP 3 x160.0

XXX.X

CTEMP 1 x 79.73

XXX.X

CTEMP 2 x119.51

XXX.X

CTEMP 3 x159.34

CALIBRATION ART: 1, 2, 3-point calibration A

>1-point<, >2-point < or >3-point < calibration can be carried out.

First geometrically define the location for calibration (measuring point CT), then determine the temperature values of the calibration points. The calibration type also determines the number of pairs of values indicated on the VFD COMFORT-DISPLAY.

2 values per calibration point

TTEMP X: Temperature on circulator (actual value TT) 1 or 2 or 3

Defined temperature value of the calibration point. This value is simultaneously stored with > CTEMP < and can be indicated for control purposes.

CTEMP X: Calibration temperature (actual value CT) 1 or 2 or 3

The „Calibration value“ is determined with a temperature measuring device and stored under menu item > CTEMP <.

Page 54

Menu functions

Example: 1-point calibration

°C

T 1

3-point calibration

°C

T 1

TT 1 = Original curve

XXXXX

ENU

CONTROL

Principle:

For ATC calibration, in steady state the bath temperature at the location of the temperature sensor (CT) is determined at the respective adjusted working temperature. This value is then set on the recirculating cooler in the menu >ATCalibration< under menu item > CTEMP X <. This can be a 1-point, 2-point or 3-point calibration.

°C

M = Temperature measuring instrument with temperature sensor

B = Bath tank with T = recirculating cooler

CT = Temperature on measuring point TT = Temperature on recirculating cooler

°C

Example:

3-point calibration for internal control. In the temperature range of 80 °C to 160 °C the calibration curve of the

temperature sensor (TT) should be assimilated to the actual temperatures on the measuring point (CT).

Set controller to internal control:

 The control type can only be adjusted in the -OFF- condition

1. Press the button until the menu item > MENU / CONTROL< is

displayed and press enter

1.1. Under the menu >CONTROL< set the parameter to > INT < and

press enter

Continue: Press

2. Press the start/stop key .

(see page 33).

Page 55

Recirculating Cooler

XXX.X

SETP 1

80.0

XXXXX

ENU

ADJUS

XXX.X

INT

XXX.X

OFF

XXX.X

C ART 3 POINT

XXX.X

CTEMP 1 I 79.73

XXX.X

TTEMP 1

control

I 80.00

 „I“ for internal

CT SEN

TCSTAT

Setting working temperature SETP:

3. Press and set the first temperature value under

> SETPoint 1 < for example (example 1

3.1. Wait until this temperature is maintained constant in the bath for about 5 minutes.

Calibration procedure:

value = 80 °C).

4. Press the button until the menu item > MENU / ADJUST < is

displayed and press enter

4.1. Set menu item >ATC SEN< to >INT< ,

4.2. Set menu item >ATCSTAT< to >OFF<,

4.3. Set menu item >C ART< to >3 POINT <.

 These 3 settings are maintained for the length of the 3-point

calibration procedure.

5. Read the value of CT on the temperature measuring device and

enter the respective value under menu item >

5.1.

Set value: (79.73 °C)

Use the cursor keys until the numeral you wish to change blinks.

Use the increase/decrease arrows selected numeral (-, 0, 1, 2, 3, ... 9).

Press enter and the recirculating cooler also stores the

5.2.

value of TT The first of the 3 points is now calibrated.

Continue: Press

CTEMP 1<

to move left or right on the display

to change the

as value for >TTMP 1< (80.00 °C) .

6. Repeat the calibration procedure for 120 °C and 160 °C.

(point

Examples:

TT = 80.00 °C TT = 120.00 °C TT = 160.00 °C CT = 79.73 °C CT = 119.51 °C CT = 159.34 °C

3. to 5.).

Page 56

Menu functions

9.8. MENU ANALOG – Analog inputs/outputs

REG+EPROG STAND-B

XXXXX

ENU

ANALOG

F-ALARM Function at alarm

A-ALARM Type of alarm

EX-STBY STAND-BY input

ACTINT [°C] internal actual temperature value (bath temperature)

LARM

 In order to use the analog inputs and outputs, the recirculating cooler

must be equipped with the Analog Interface Modul available as option.

This submenu enables setting of the input and output values for the programmer input and the temperature recorder outputs of socket REG+E-PROG.

The >STAND-BY< input and the >ALARM< output are configurable.

ANALOG: Press enter to switch to menu level 2

>F-ALARM< (STANDBY / ALARM / AL-STBY) >A-ALARM< ( NORMAL / INVERS )

>EX-STBY < (INACTIV / ACTIV)

>CHANNEL < (1 / 2 / 3)

>CH1 < (ACTINT/ ACTEXT/ POWER/ S-POINT)

>CH1 0V< (-99.90 )

ACTEXT [°C] external actual temperature value (external sensor)

S-POINT [°C] active setpoint temperature

POWER [%]

SETP [°C] Setpoint

FLOWRAT [L/M]

ACTVAR [%] Actuating variable

>EPROG < (VOLTAGE (U) /

>CH1 10V< (300.00 )

>CH2 < (POWER/ S-POINT/ ACTINT/ ACTEXT)

>CH2 0V< (0.00 )

>CH2 10V< (100.00 )

>CH3 < (S-POINT/ ACTINT/ ACTEXT/ POWER) >CH3 < (0-20MA / 4-20MA)

>CH3 0MA< (-99.90 )

>CH3 20MA< (300.00 )

CURRENT

> EPROG U< (SETP / FLOWRAT / ACTVAR)

> UW °C< (-99.90 )

> OW °C< (300.00 )

(I))

Page 57

Recirculating Cooler

>EPROG < (

> EPROG I< (SETP / FLOWRAT / ACTVAR)

> UW °C< (-99.90 )

> OW °C< (300.00 )

VOLTAGE

(U) / CURRENT (I))

1. Press the button until the desired submenu is displayed.

2. Set value/parameter:

Use the cursor keys numeral you wish to change blinks.

Use the increase/decrease arrows numeral (-, 0, 1, 2, 3, ... 9).

select the parameter with the keys

to move left or right on the display until the

to change the selected

3. Press enter to store the value / parameter

XXXXX

F-ALARM STANDBY

ALARM

Continue: Press

Alarm output (for external alarm signal)

Possible parameters: >F-ALARM< (STANDBY or ALARM or AL-STBY)

>A-ALARM< ( NORMAL or INVERS )

This socket is a potential-free change-over contact. With the adjustments in the menu item > signaled without having to change the pin assignments.

Signification of the terms under menu item >Function< :

The recirculating cooler is in condition >STANDBY< or >ALARM<

Funktion-ALARM < all operating conditions can be

-OFF-

S xx.xx E -----

or >AL-STBY< - both conditions are signaled.

/ or

XXXX

LARM ODE xx

Page 58

Menu functions

XXXXX

-ALARM

NORMAL

Type of alarm

STAND-BY

XXXXX

EX-STBY ACTIV

E OFF

S xx.xx E -----

STAND-BY

For >

A-ALARM / NORMAL < pins 2 and 3 are connected in any case

according to the selected >

For >

A-ALARM / INVERS < pins 2 and 1 are connected in any case

according to the selected >Function<.

Switching capacity max. 30 W / 40 VA Switching voltage max. 125 V Switching current max. 1 A

EX-STBY: External Stand-by input

(for external emergency switch-off) (Connector see page 65)

Possible parameters:

INACTIV - standby input is ignored ACTIV - standby input is active

Activate the standby input:

1. Under menu item > EXT-STBY <, set the parameter to >

2. Connect an external contact ‚AK‘ (e.g. for emergency switch-off) or an alarm contact of the superordinated system.

In case the connection between Pin 2 and Pin 3 is interrupted by opening the contact ‚AK‘, a complete shutdown of the circulating pump and heater is effected, and the unit enters the condition „ If the contact is reclosed, the instrument returns to the standby state and

E OFF“ is displayed. Press to start.

„

Function-ALARM <.

/

>EX-STBY <

ACTIV<.

E OFF“.

 Additional tips for using the STANDBY input:

The standby function can be used in conjunction with the AUTOSTART feature (see page 41)

1. If the Autostart function is NOT turned ON, the standby input is used as described above.

2. If the Autostart function is enabled, the instrument will revert back to the original method of entering the setpoint (i.e. keypad, RS232, Analog input, etc.).

Entering the setpoint with the keypad. As described above, a bipolar shutdown is accompanied by displaying the „ when the contact is reclosed. The temperature of the bath fluid changed during the „

Entering the setpoint with the programmer display at the current value. The temperature of the bath fluid will be held constant at this temperature. The programmer continues once the contact is reclosed.

Notice: This is not an actual shutoff feature.

E OFF appears. The setpoint value and the time are both held

E OFF“ state. The recirculating cooler starts again

E OFF“ state.

e.g.

(see pages 48). The

Page 59

Recirculating Cooler

CHANNEL 3

EPROG

CHANNEL 2

CHANNEL 1

XXXXX

CHANNEL 1

XXXXX

CH1 ACTINT

3. 



REG+E-PROG

XXXXX

CH1 0

10.0

XXXXX

CH1 10

210.0

REG+E-PROG : Outputs of the connector REG+E-PROG

1. Select CHANNEL 1, 2 or 3

2. First define the desired output value for CHANNELs 1 to 3:

ACTINT internal actual temperature value (bath temperature)) ACTEXT external actual temperature value (external sensor) POWER periodic or intermittent heating or cooling S-POINT active setpoint temperature

(SETPoint 1, 2, 3,/ integr. programmer /external programmer)

3. Then select the display size for CHANNELs 1 to 3:

Voltage outputs CHANNELs 1 and 2

Assign the voltage values of 0 V to the lowest and 10 V to the highest necessary temperature (°C) or power rating (%) required as an output value.

Current output CHANNEL 3

The current output (channel 3) offers 2 ranges for selection:

0 mA to 20 mA or 4 mA to 20 mA

Assign the current values 0 mA or 4 mA to the lowest and 20 mA to the highest temperature (°C) or power rating (%) required as an output value.

XXXXX

CH3 ACTINT

XXXXX

CH3 ACTINT

XXXX

CH3 0-20MA

XXXX

CH3 4-20MA

XXXX

H3 0MA xx.xx

XXXX

CH3 4MA xx.xx

XXXX

H3 20A xx.xx

XXXX

H3 20A xx.xx

(20A 20 MA)

0 V

10 °C 210 °C



200 K

197 °C 202 °C



5 K

0 mA 4 mA

20 mA

Example 1:

 lowest temperature value: 10 °C  highest temperature value 210 °C

Fig. shows 200 rise: 50 mV/°C Example 2: lowest temperature value: 197 °C highest temperature value: 202 °C Fig. shows 5 rise: 2000 mV/°C

C scaled to paper width

Page 60

Menu functions

XXXXX

ENU

CONFIG

XXXXX

SETP

EPROG

XXXXX

CTVAR

EPROG

-OFF-

S XX.XX F X.XL

FLOWRAT<

Indication on display

XXXXX

ENU

ANALOG

Example:

XXXXX

EPROG

VOLTAGE

XXXXX

EPROG U

E-PROG - input

Setting needs to be carried out, if

1. setpoint programming is to be made via an external voltage or current source or programmer. For this, in the menu > MENU / CONFIG < first set the menu item > SETP < to >EPROG<.

2. the heater variable should be controlled via an external control pulse. For this, in the menu > MENU / CONFIG < set the menu item >ACTVAR< to >EPROG<.

3. the signal of an external flow meter should be registered.

 The E-Prog input can only be used either under menu item > SETP

< or under menu item > ACTVAR <. If the input is neither occupied by > SETP < or > ACTVAR <, the signal of a flow meter can be connected.

 First set > MENU / CONFIG <, then > MENU / ANALOG <.

1. Connect the external voltage or current source or programmer to

socket (12) REG+E-PROG of the circulator.

2. Selecting the signal:

The programmer (E-PROG) input of the circulator can be matched to the output signal of the external voltage or current source.

VOLTAGE voltage input = U CURRENT current input = I

3. Define the input variable:

SETP Setpoint programmed by external voltage or current FLOWRAT Signal of an external flow sensor ACTVAR Manipulated (ACTuated) variable for the heater

with an external control pulse

XXXXX

UW °C

20.0

SETP

XXXXX

OW °C

300.00

XXXXX

SP 50.00

I xx.xx

4. UW – Setting the LOW value: (See below )

First adjust and set the lowest voltage or current on the external voltage or current source (e.g. 0 V or 0 mA). Then after approx. 30 secs enter the corresponding temperature value (e.g. 20.00°C).on the circulator by pressing the appropriate buttons

) on the keypad and press enter to set.

(

5. OW – Setting the HIGH value: (See below )

First adjust and set the highest voltage or current on the external voltage or current source (e.g. 10 V or 20 mA). Then after approx. 30 secs enter the corresponding temperature value (e.g. 300 °C).on the circulator by pressing the appropriate

buttons (

Example: SP 50.00 °C

 Set the external voltage or current source output for the equivalent

of 50 °C temperature setpoint.

) on the keypad and press enter to set.

Page 61

Setpoint Programmer

SP =

Recirculating Cooler

 Press .

The temperature value adjusted and set on the external voltage or current source is displayed in line 2 of the VFD COMFORTDISPLAY for control purposes.

This EPROG input enables the use of different voltage and current values as program parameters.

UW – Setting the LOW value:: (See below )

300

250

200

150

100

80 60

40 20

1234 5678910 V

246810 14 18 20 m

1. Adjust and set the lowest desired value on the voltage or

current source resp. (Example A: 1 V). Wait appr. 30 seconds.

2. Assign a lower temperature threshold value to this adjusted

voltage/current value by pressing the appropriate buttons on the keypad of the instrument (Example A: 20 C ) and set by

pressing enter

OW – Setting the HIGH value: (See below )

Adjust and set the highest desired value on the voltage or current source resp. (Example A: 10 V). Wait appr. 30 seconds.

Assign an upper temperature threshold value to this

adjusted voltage/current value by pressing the appropriate buttons on the keypad of the instrument (Example A: 200

and set by pressing enter

XXXXX

UW °C

20.00

XXXXX

OW °C

200.00

C)

XXXXX

SP152.00

I xx.xx



 Example B in the diagram serves to illustrate that the end

point values are freely selectable (Ex: 8 mA and 16 mA).

Example out of diagram A:

 Adjusting the voltage source for an output of 7.6 V!

The instrument calculates this value from the rise angle of the two predecided end points (in example A: 7.6 V correspond to an external setpoint temperature of 152.0

Notice:

If this adjustment is not correctly performed at two different points, the setpoint setting will be incorrect.

Important: The usable temperature range between > configured working temperature range of the circulator resp. of the unit combination (working temperature range see technical specifications on page 11)

After returning the VFD display to standard display by pressing this value is displayed in line 2 (Example: SP 152.00

C ).

C).

UW < and > OW < is limited to the

Page 62

Troubleshooting guide / Error messages

10. Troubleshooting guide / Error messages

XXXXX

LARM

CODE 01

+

XXXXX

WARNIN CODE 4

ALARM CODE 01

WARNING CODE 03

ALARM

CODE 03

WARNING CODE 04

ALARM

CODE 04

ALARM CODE 05

ALARM CODE 06

ALARM CODE 07

Alarm with a complete shutdown of the unit

Whenever the microprocessor electronics registers a failure, a complete shutdown of the heater and circulating pump is performed. The alarm light

“ illuminates and a continuous signal tone sounds.

„ The VFD COMFORT-DISPLAY indicates the cause for the alarm in form of a code.

Warning without a complete shutdown of the unit

The VFD COMFORT-DISPLAY indicates the cause for the warning in form of a code and an acoustic signal sounds in regular intervals. These messages appear every 10 seconds.

Press enter

 The recirculating cooler is operated without bath fluid, or the liquid level is

insufficient. Replenish the bath tank with the bath fluid.

 Tube breakage has occured (insufficient filling level due to excessive bath

fluid pumped out). Replace the tubing and replenish the bath tank with the bath fluid.

 The float is defect (e. g., because damaged in transit). Repair by

authorized JULABO service personnel.

 Excess temperature sensors defect.

 The excess temperature value lies below the working temperature

setpoint. Set the excess temperature to a higher value.

 Excess temperature warning

or Excess temperature alarm

Warning type: Set to>Warning< or >Alarm< (see page 30)

 Low temperature warning

or Low temperature alarm.

Warning type: Set to>Warning< or >Alarm< (see page 30)

 Cable of the working temperature sensor interrupted or short-circuited.

 Defect of the working or excess temperature sensor.

Working temperature and excess temperature sensors report a temperature difference of more than 35 K.

 Other errors (I

to quit the audible signal.

C-BUS errors)

Page 63

Recirculating Cooler

ALARM CODE 12

ALARM CODE 14

ALARM CODE 15

ALARM CODE 33

ALARM CODE 38

WARNING CODE 40

 Error in A/D converter

 Excess temperature sensors defect.

 The excess temperature value lies below the working temperature

setpoint. Set the excess temperature to a higher value.

 External control selected, but external Pt100 sensor not connected or

defect.

 Cable of the excess temperature sensor interrupted or short-circuited.

 Ext. Pt100 sensor input without signal, but setpoint programming set to

external Pt100.

 The early warning system for low level signals a critical fluid level.

Replenish the bath tank with the bath fluid.

After eliminating the malfunction, press the mains power switch off and on again to cancel the alarm state. If the unit cannot be returned to operation, contact an authorized JULABO service station.

Mains circuit breakers (resettable) – 16A.

Page 64

Electrical connections

11. Electrical connections

Notice:

Use shielded cables only. The shield of the connecting cable is electrically connected to the plug housing.

The unit ensures safe operation if connecting cables with a maximum length of 3 m are used. The use of longer cables does not affect proper performance of the unit, however

external interferences may have a negative impact on safe operation.

ext. Pt100

Pt100

Accessories: Order No. Description

8 980 073 RS232 interface cable 9-pol./9-pol. , 2,5 m

8 900 110 USB interface adapter cable

hield Plug

SERIAL

Look on

soldering side.

Socket for external Pt100 sensor

Pin assignment: Pin Signal 1 I+ 2 U+ 3 U 4 I-

The shield of the connecting cable is electrically connected to the plug housing and the sensor tube.

RS232 serial interface

This port can be used to connect a computer with an RS232 cable for remote control of the circulator.

Pin assignments RS232:

Pin 2 RxD Receive Data Pin 3 TxD Transmit Data Pin 5 0 V Signal GND Pin 7 RTS Request to send Pin 8 CTS Clear to send

Pin 1; 4; 6, 9 Reserved - do not use!

Page 65

Recirculating Cooler

ALARM

Alarm output

(for external alarm signal) This potential-free change-over contact is activated in case of an alarm

when pins 2 and 3 are connected.

Switching capacity max. 30 W / 40 VA Switching voltage max. 125 V Switching current max. 1 A

Functional description see page 57

/

STAND-BY input

(for external emergency switch-off)

STAND-BY

Pin assignment: Pin Signal 1 not connected 2 5 V / DC 3 0 V

Functional description see page 6

Programmer input / temperature recorder output

REG+E-PROG

Pin Signal 1 Voltage output Channel 1 0 ... 10 V 2 Voltage output Channel 2 0 ... 10 V 3 GND for outputs 0 V 4 Programmer input EPROG 0 to 10 V / 0 to 20 mA 5 Current output Channel 3 0 to 20 mA / 4 to 20 mA 6 GND for Progammer 0 V

Functional description see page 59

Control connector Return flow safety device.

If the liquid levels in the recirculating cooler and the external system are at different heights, overflowing must be prevented after the power has been turned off. For this reason, solenoid valves for loop circuit can be integrated in the loop circuit.

 The control output is not powered in the OFF condition.

Output voltage: 230 V

 / max. 0.1 A

Page 66

Remote control

12. Remote control

12.1. Setup for remote control

1. Check the interface parameters for both interfaces (on recirculating cooler and PC) and make sure they match.

SERIAL



(Serial interface see page 45)

2. In the menu > MENU / CONFIG < set the menu item > SETPoint < to > SERIAL < . (see 9.3.1. SETPOINT – Keypad control or remote control on page 40)

3. Connect both units with an interface cable..

Like all parameters which can be entered through the keypad, interface parameters are stored in memory even after the recirculating cooler is turned off.

12.2. Communication with a PC or a superordinated data system



If the recirculating cooler is put into remote control mode via the configuration level, the VFD COMFORT-DISPLAY will read „R -OFF-„ = REMOTE STOP. The recirculating cooler is now operated via the computer. In general, the computer (master) sends commands to the recirculating cooler (slave). The recirculating cooler sends data (including error messages) only when the computer sends a query.

In remote control mode: After a power interruption the order to start and all values which have to be adjusted must be resent from the personal computer via the interface. AUTOSTART is not possible.

A transfer sequence consists of:

 command

 space (

 parameter (the character separating decimals in a group is the period)

 end of file (; Hex: 0D)

 The response (data string) after an in command is always followed by a

line feed (LF, Hex: 0A).

The commands are divided into

in commands: asking for parameters to be displayed out commands: setting parameters

; Hex: 20)



in or out commands.

Page 67





Recirculating Cooler

Important times for a command transmission:

To ensure a safe data transfer, the time gap between two commands should be at least 250 ms. The circulator automatically responds to an followed by a LF (Line Feed). The next command should only be sent after 10 ms.

The out commands are valid only in remote control mode.

Examples: Command to set the working temperature >Setpoint1< to 55.5 °C

out_sp_00  55.5

Command to ask for the working temperature >Setpoint1<

in_sp_00

Response from the circulator:

55.5 LF

in command with a data string

12.3. List of commands

out commands: Setting temperature values or parameters.

Command Parameter Response of recirculating cooler

out_mode_01 0 Use working temperature > SETP 1<

out_mode_01 1 Use working temperature > SETP 2<

out_mode_01 2 Use working temperature > SETP 3<

out_mode_02 0 Selftuning „OFF“.

Temperature control by using the stored parameters.

out_mode_02 1 Selftuning „ONCE“

Single selftuning of controlled system after the next start.

out_mode_02 2 Selftuning „ALWAYS“

Continual selftuning of controlled system whenever a new setpoint is to be reached.

out_mode_03 0 Set external programmer input to voltage.

Voltage 0 V ... 10 V

out_mode_03 1 Set external programmer input to current.

Current 0 mA ... 20 mA

out_mode_04 0 Temperature control of internal bath.

out_mode_04 1 External control with Pt100 sensor.

out_mode_05 0 Stop the unit = R –OFF-.

Page 68

Remote control

Command Parameter Response of recirculating cooler

out_mode_05 1 Start the unit.

out_mode_08 0 Set the control dynamics - aperiodic

out_mode_08 1 Set the control dynamics - standard

out_sp_00 xxx.xx Set working temperature. „SETP 1“

out_sp_01 xxx.xx Set working temperature. „SETP 2“

out_sp_02 xxx.xx Set working temperature. „SETP 3“

out_sp_03 xxx.xx Set high temperature warning limit „OVERTEMP“

out_sp_04 xxx.xx Set low temperature warning limit „SUBTEMP“

out_sp_06 xxx.xx Set manipulated variable for the heater via serial interface

-99.99 ... +100 [%]

out_sp_07 x Set the pump pressure stage. (1 ... 4)

out_par_04 x.x CoSpeed 0 ... 5.0 Band limit during external control.

Setting the maximum difference between the temperatures in the internal bath and external system.

out_par_06 xxx Xp control parameter of the internal controller. 0.1 ... 99.9

out_par_07 xxx Tn control parameter of the internal controller. 0 ... 9999

out_par_08 xxx Tv control parameter of the internal controller. 0 ... 999

out_par_09 xxx Xp control parameter of the cascade controller. 0.1 ... 99.9

out_par_10 xxx Proportional portion of the cascade controller. 1 ... 99.9

out_par_11 xxx Tn control parameter of the cascade controller. 0 ... 9999

out_par_12 xxx Tv control parameter of the cascade controller. 0 ... 999

out_par_13 xxx Maximum internal temperature of the cascade controller.

out_par_14 xxx Minimum internal temperature of the cascade controller.

out_par_15 xxx Band limit (upper) 0 ... 200 °C

out_par_16 xxx Band limit (lower) 0 ... 200 °C

Page 69

Recirculating Cooler

in commands: Asking for parameters or temperature values to be displayed.

Command Parameter Response of recirculating cooler

version none Number of software version (V X.xx)

status none Status message, error message (see page 71)

in_pv_00 none Actual bath temperature.

in_pv_01 none Heating power being used (%).

in_pv_02 none Temperature value registered by the external Pt100 sensor.

in_pv_03 none Temperature value registered by the safety sensor.

in_pv_04 none Setpoint temperature of the excess temperature protection

in_sp_00 none Working temperature „SETP 1“

in_sp_01 none Working temperature „SETP 2“

in_sp_02 none Working temperature „SETP 3“

in_sp_03 none High temperature warning limit „OVERTEMP“

in_sp_04 none Low temperature warning limit „SUBTEMP“

in_sp_05 none Setpoint temperature of the external programmer

(REG+E-PROG) .

in_sp_07 none Adjusted pump stage

in_sp_08 none Value of a flowrate sensor connected to the E-Prog input

in_par_00 none Temperature difference between working sensor and safety

sensor

in_par_01 none Te - Time constant of the external bath.

in_par_02 none Si - Internal slope

in_par_03 none Ti - Time constant of the internal bath.

in_par_04 none CoSpeed - Band limit (max. difference between the

temperatures in the internal bath and external system).

in_par_05 none Factor pk/ph0:

Ratio of max. cooling capacity versus max. heating capacity

in_par_06 none Xp control parameter of the internal controller.

in_par_07 none Tn control parameter of the internal controller.

in_par_08 none Tv control parameter of the internal controller.

in_par_09 none Xp control parameter of the cascade controller.

in_par_10 none Proportional portion of the cascade controller.

Page 70

Remote control

Command Parameter Response of recirculating cooler

in_par_11 none Tn control parameter of the cascade controller.

in_par_12 none Tv control parameter of the cascade controller.

in_par_13 none Adjusted maximum internal temperature of the cascade

controller.

in_par_14 none Adjusted minimum internal temperature of the cascade

controller.

in_par_15 none Band limit (upper)

in_par_16 none Band limit (lower)

in_mode_01 none Selected setpoint:

0 = SETP 1

1 = SETP 2

2 = SETP 3

3 = Last setpoint setting was carried out through an external programmer

in_mode_02 none Selftuning type:

0 = Selftuning „OFF“

1 = Selftuning „ONCE“

2 = Selftuning „ALWAYS“

in_mode_03 none Type of the external programmer input:

0 = Voltage 0 V to 10 V

1 = Current 0 mA to 20 mA

in_mode_04 none

Internal/external temperature control:

0 = Temperature control with internal sensor.

1 = Temperature control with external Pt100 sensor.

in_mode_05 none

Recirculating cooler in Stop/Start condition:

0 = Stop

1 = Start

in_mode_08 none

Adjusted control dynamics

0 = aperiodic

1 = standard

in_hil_00 none Max. cooling power (%).

in_hil_01 none Max. heating power (%).

Page 71

12.4. Status messages

Recirculating Cooler

Status messages 00 MANUAL STOP

01 MANUAL START 02 REMOTE STOP 03 REMOTE START

12.5. Error messages

Error messages

-01 LOW LEVEL ALARM

-03 EXCESS TEMPERATURE WARNING

-04 LOW TEMPERATURE WARNING

-05 WORKING SENSOR ALARM

-06 SENSOR DIFFERENCE ALARM

Description

Recirculating cooler in „OFF“ state.

Recirculating cooler in keypad control mode.

Recirculating cooler in „r OFF“ state.

Recirculating cooler in remote control mode.

Description

Low liquid level alarm or Excess temperature protector alarm

High temperature warning.

Low temperature warning.

Working temperature sensor short-circuited or interrupted.

Sensor difference alarm. Working temperature and safety sensors report a temperature difference of more than 35 K.

-07 I2C-BUS ERROR

-08 INVALID COMMAND

-09 COMMAND NOT ALLOWED IN CURRENT OPERATING MODE

-10 VALUE TOO SMALL

-11 VALUE TOO LARGE

-12 TEMPERATURE MEASUREMENT ALARM

-13 WARNING : VALUE EXCEEDS TEMPERATURE LIMITS

-14 EXCESS TEMPERATURE PROTECTOR ALARM

-15 EXTERNAL SENSOR ALARM

-33 SAFETY SENSOR ALARM

-38 EXTERNAL SENSOR SETPOINT PROGRAMMING ALARM

-40 NIVEAU LEVEL WARNUNG

Internal error when reading or writing the I2C bus.

Invalid command.

Invalid command in current operating mode.

Entered value too small.

Entered value too large.

Error in A/D converter.

Value lies outside the adjusted range for the high and low temperature warning limits. But value is stored.

Excess temperature protector alarm

External control selected, but external Pt100 sensor not connected.

Excess temperature sensor short-circuited or interrupted.

Ext. Pt100 sensor input without signal and setpoint programming set to external Pt100.

Low liquid level warning in the internal reservoir.

Page 72

JULABO Service – Online remote diagnosis

13. JULABO Service – Online remote diagnosis

JULABO circulators of the HighTech series are equipped with a black box. This box is implemented in the controller and records all significant data for the last 30 minutes. In case of a failure, this data can be read out from the unit by using special software. This software is available as a download from www.julabo.de

 Installation is easy and is performed step by step.

Please observe the instructions.

 Data read-out is possible in the conditions

“OFF”, “R OFF” or “ALARM”.

 Connect the circulator to the computer using an interface

cable.

 Start the EasyBlackBox program.

The program asks for the port used (COM1, ......) and the baud

rate of the unit. You do not have this information on hand? Simply try it out! The program continues to send the request until the correct settings are made.

 Data is read out and shown on the monitor

divided into the sections >Einstellungen/Settings<, >Alarmspeicher/Alarms stored<, >Blackbox<

 see example

 After pressing >Speichern/Save<, a text file is

created. The program suggests a filename >C:\model description and barcode no.<. Modifications are possible.

 E-mail this file to service@julabo.de, JULABO's

service department. JULABO is thus able to provide rapid support.

\ EasyBlackBox.

free

Page 73

14. Cleaning / repairing the unit

Caution:

 Always turn off the unit and disconnect the mains cable from the power source

before cleaning the unit.

 Prevent humidity from entering into the circulator.  Service and repair work may be performed only by authorized electricians.

Air cooled recirculating coolers:

To maintain the full cooling performance, clean the condenser from time to time.

 Switch off the unit, disconnect mains power cable.

 Remove the venting grid.

 Clean the ribbed condenser with a vacuum cleaner.

 Replace the venting grid.

 Switch on the unit.

Cleaning:

Recirculating Cooler

For cleaning the bath tank and the immersed parts of the recirculating cooler, use low surface tension water (e.g., soap suds). Clean the outside of the unit using a wet cloth and low surface tension water.

The recirculating cooler is designed for continuous operation under normal conditions. Periodic maintenance is not required.

The tank should be filled only with a bath fluid recommended by JULABO. To avoid contamination, it is essential to change the bath fluid from time to time.

Repairs Before asking for a service technician or returning a JULABO

instrument for repair, please contact an authorized JULABO service station.

When returning the unit:

 Clean the unit in order to avoid any harm to the service personnel.  Attach a short fault description.  During transport the unit has to stand upright. Mark the packing

correspondingly.

 When returning a unit, take care of careful and adequate packing.  JULABO is not responsible for damages that might occur from

insufficient packing.

JULABO reserves the right to carry out technical modifications with repairs for providing improved performance of a unit.

JULABO SC 2500w User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual