JULABO ME-26 User Manual

Operating Manual

Heating Circulators ME-4

English

ME-6 ME-12 ME-26

1.951.0506-V2 06/13

JULABO GmbH 77960 Seelbach / Germany Tel. +49 (0) 7823 / 51-0 Fax +49 (0) 7823 / 24 91 info@julabo.de www.julabo.de

19510506-V2.doc 15.07.13

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

TABLE OF CONTENTS

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

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

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

2. Operator responsibility – Safety recommendations .................................................................. 6

2.1. Disposal ............................................................................................................................... 7

2.2. EC Conformity ...................................................................................................................... 8

2.3. Warranty conditions ............................................................................................................. 8

2.4. Technical specifications ....................................................................................................... 9

Operating instructions ................................................................................................................... 11

3. Safety notes for the user ........................................................................................................ 11

3.1. Explanation of safety notes ................................................................................................ 11

3.2. Explanation of other notes ................................................................................................. 11

3.3. Safety recommendations ................................................................................................... 12

4. Operating controls and functional elements ........................................................................... 14

4.1. Circulator ............................................................................................................................ 14

5. Preparations ........................................................................................................................... 16

5.1. Installation .......................................................................................................................... 16

5.2. Bath fluids .......................................................................................................................... 16

5.3. Temperature application to external systems .................................................................... 17

5.1.1. Tubing ........................................................................................................................... 18

5.4. Filling / draining .................................................................................................................. 19

5.5.

Countercooling ................................................................................................................... 20

6. Operating procedures ............................................................................................................. 21

6.1. Power connection .............................................................................................................. 21

6.2. Switching on / Start - Stop ................................................................................................. 21

6.2.1. Switching on the circulator ............................................................................................. 21

7.1. Using the pre-settings in the

7.2. Direct setting of temperatures ............................................................................................ 23

8.1. Excess temperature protection .......................................................................................... 24

8.1.1. Early warning system, low level protection .................................................................... 25

8.2. Switch-over from warning to shutdown function................................................................. 26

Setting of temperatures ............................................................................................. 22

menu ....................................................................... 22

Safety installations, warning functions ...................................................................... 24

8.3. Over and Sub temperature warning function ..................................................................... 27

9.1. MENU PROGRAM – START ............................................................................................. 29

9.2. MENU PROGRAM – creation, administration .................................................................... 31

9.3. MENU PUMP – Setting of pump pressure ......................................................................... 33

9.4. MENU CONFIG – Configuration of unit ............................................................................. 34

9.4.1. REMOTE ....................................................................................................................... 35

9.4.2. AUTOSTART ................................................................................................................. 35

9.4.3. OFF-MODE ................................................................................................................... 36

9.4.4. Setting of clock and date ............................................................................................... 36

9.4.5. RESET – Factory settings ............................................................................................. 36

9.5. MENU CONTROL – Control characteristics and parameters ............................................ 37

9.5.1. CONTROL – Control INTERNAL / EXTERNAL ............................................................ 38

9.5.2. Dynamic internal ............................................................................................................ 39

9.5.3. Control parameters – XPU-, XP-, TN-, TV- EXTERNAL ............................................... 39

9.5.4. Control parameters– XP-, TN-, TV- INTERNAL ............................................................ 40

9.6. MENU SERIAL - BAUDRATE, HANDSHAKE, PARITY .................................................... 41

9.7. MENU ATC - Absolut Temperature Calibration ................................................................. 42

9.7.1. ATC SENSOR - INTERNAL / EXTERNAL .................................................................... 44

9.7.2. ATC STATUS - YES / NO ............................................................................................. 44

9.7.3. CALIBRATION TYPE: 1 -/ 2 -/ 3 POINT ........................................................................ 45

9.7.4. Example: 3-point calibration for internal control ........................................................... 46

Menu functions ......................................................................................................... 28

9.8. MENU LIMITS .................................................................................................................... 48

9.8.1. Limits for internal control ............................................................................................... 49

9.8.2. Limits for external control .............................................................................................. 49

10. Troubleshooting guide / error messages ................................................................................ 51

11. Electrical connections ............................................................................................................. 54

12. Remote control ....................................................................................................................... 55

12.1. Setup for remote control .................................................................................................... 55

12.2. Communication with a PC or a superordinated data system ............................................. 56

12.3. List of commands ............................................................................................................... 57

12.4. Status messages ............................................................................................................... 59

12.5. Error messages .................................................................................................................. 59

13. JULABO Service – Online remote diagnosis .......................................................................... 61

14. Cleaning / repairing the unit .................................................................................................... 62

Operating manual

1. Intended use

JULABO circulators 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 circulators are not suitable for direct temperature control of foods, semiluxury 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 circulators are operated via the splash-proof keypad. The microprocessor

technology allows different values to be set, stored, and displayed on the VFD COMFORT-DISPLAY. Three menu keys facilitate the adjustment of setpoints, warning and safety functions, and menu functions.

1x10

PID3

ATC

RS232

Pt100

SMART

PUMP

 Temperature- and time-dependent processes can be stored and executed using

the integrated programmer.

 The adjustable PID cascade temperature control automatically adjusts the heat

supply to the thermal requirements of the bath.

 Absolute Temperature Calibration (ATC3) provides high temperature stability at all

points 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 entire temperature range.

 Electrical connections:

RS232 interface for modern process technology without an additional interface. Connection for external Pt100 sensor for external temperature measurement and control. Alarm output for external alarm message or control of JULABO refrigerating baths or solenoid valve (cooling water).

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

device independent from the control circuit. Its safety value can be displayed and adjusted on the VFD COMFORT-DISPLAY.

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

before the low level protection according to IEC 61010-2-010 triggers a safety shutdown of the main functional elements.

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

speed) can be adapted to different conditions for internal and external temperaturecontrol applications.

Operator responsibility – Safety recommendations

2. Operator responsibility – Safety recommendations

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

JULABO GmbH Eisenbahnstraße 45 77960 Seelbach / Germany

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

Safety instructions for the operator:

 You have received a product designed for industrial use. Nevertheless, 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

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. 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.

Appropriate operation

Only qualified personnel is authorized to perform configuration, installation, maintenance and repairs of the circulator. Routine operation can also be carried out by untrained personnel who should however be instructed by trained personnel.

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.

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

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)

2.1. Disposal

The circulator contains a back-up battery that supplies voltage to 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 might be obliged to give back used or defect batteries to gathering places. The product may be used with oil as bath fluid. These oils fully or partially consist of mineral oil or synthetic oil. For disposal, observe the instructions in the safety data sheets.

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!

Operator responsibility – Safety recommendations

2.2. EC Conformity

The products described in the operating instructions conform to the requirements of the following European guidelines:

Directive of the European Parliament and of the Council on the approximation of

the laws of the Member States relating to machinery.

EMC guideline with respect to legal harmonization of the member countries

concerning electromagnetic compatibility.

JULABO GmbH Eisenbahnstr. 45 77960 Seelbach / Germany

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

2.4. Technical specifications

Heating circulators ME-4 ME-6 ME-12 ME-26

Working temperature range °C 20 ... 200 20 ... 200 20 ... 200 20 ... 200 Temperature stability °C ±0,01 ±0,01 ±0,01 ±0,01 Bath opening (WxL) cm 13x15 13x15 22x15 22x30 Bath depth cm 15 20 20 20 Filling volume liters 3 ... 4,5 4,5 ... 6 7,5 ... 12 18 ... 26 Overall dimensions (WxDxH) cm 21x42x38 21x43x42 30x43x45 36x61x45 Weight kg 9,6 12,5 13,0 26,0

All measurements have been carried out at: rated voltage and frequency ambient temperature: 20 °C bath fluid: water operating temperature: 70 °C Technical changes without prior notification reserved.

Mains power connection 230 V/50 Hz V/ Hz 190 ... 253 / 50-60 Current draw (at 208 V / 230 V) A 8 / 9 Mains power connection 115 V/60 Hz Current draw (at 100 V / 115 V) A 8 / 9

Temperature selection digital via keypad indication on VFD COMFORT-Display remote control via personal computer indication on monitor Temperature indication VFD COMFORT-DISPLAY Resolution °C 0.01 Absolute Temperature Calibration INT/EXT °C ±3 / ±9 Temperature control PID3 cascade temperatur control Heater wattage (at 230 V) kW 2,0 Heater wattage (at 115 V) kW 1,0 Electronically adj. pump capacity stages 1 ... 4 Flow rate at 0 bar l/min 11 ... 16 Pressure max. at 0 liter bar 0.22 ... 0.45 Electrical connections: External alarm device Vdc/mA 24-0 / max. 25 Computer interface RS232 External temperature sensor Pt100

Ambient temperature °C 5 ... 40

V/ Hz 90 ... 127 / 50-60

Operator responsibility – Safety recommendations

Safety installations according to IEC 61010-2-010: Excess temperature protection adjustable from 0 °C ... 230 °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 K Alarm message optical + audible (permanent) Warning message optical + audible (in intervals)

Environmental conditions according to IEC 61 010-1: Use only indoor. Altitude up to 2000 m - normal zero. Ambient temperature: +5 ... +40 °C Air humidity: Max. rel. humidity 80 % for temperatures up to +31 °C, linear decrease down to 50 % relative humidity at a temperature of +40 °C Max. mains 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

Standards for interference resistance 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).

Operating instructions

3. Safety notes for the user

3.1. Explanation of safety notes

In addition to the safety warnings listed, warnings are posted throughout the operating 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 for averting dangers.

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.

3.2. Explanation of other notes

Note!

Draws attention to something special.

Important!

Indicates usage tips and other useful information.

This icon is used in the operating instructions to indicate flashing values or parameters which have to be set or confirmed.

Safety notes for the user

3.3. Safety recommendations

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.

 Observe the limited working temperature range when using plastic bath tanks.  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 wat e r from entering the hot bath oil.  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 opera te 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 opera te 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 touching these parts.



Caution:

The temperature controlling i.e. of fluids in a reactor constitutes normal circulator practice.

We do not know which substances are contained within these vessels. Many substances are:

 inflammable, easily ignited or explosive  hazardous to health  environmentally unsafe

i.e.: dangerous

The user alone is responsible for the handling of these substances!

The following questions shall help to recognize possible dangers and to reduce the risks to a minimum.

 Are all tubes and electrical cables connected and installed?

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

 Do dangerous steams or gases arise when heating?

Is an exhaust needed when working?

 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.

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 shut-down 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.

Operating controls and functional elements

4. Operating controls and functional elements

4.1. Circulator

Front view Rear view

Mains power switch, illuminated

Navigation keys

1. Key: >OK< Start / Stop (pump / heater )

2. >OK< in the menu Menu item / select submenu for setting Save set value Save selected parameter A beep signals the end of setting After the actions Start, Stop and change from VFD Display to standard display the key

The above graph “front side” shows an example for standard display.

1. Key: >Return< Stop (pump / heater )

2. >Return< in the menu one menu level down Correction function for parameters or values (prior to OK)

is locked for a short time.

immediately back to standard display

- icon for „keep key pressed down“.

1. Key: >Up / Down <temperature – increase/decrease setpoint Push key quickly for single steps, Keep key pressed for fast change.

2. >Up/Down< in the menu selection of menu items / parameters

Menu keys

Key: start the menu > warning and safety values<

6 7

Key: start the menu >temperature setpoints< Key: display of MENU structure

VFD COMFORT-DISPLAY

Header: Control indicators see sections 11 and 12 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

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

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 of set pump pressure stage Four stages, can be set via the key

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

Socket: control cable of JULABO refrigerated circulator or output for alarm messages

Interface RS232: remote control via personal computer

RS232

Socket for external measurement and control sensor or external setpoint programming

Pt100

A M P

Mains circuit breakers (resettable) 15 A

20 Mains power cable with plug

, under >MENU - PUMP<.

Preparations

5. Preparations

5.1. Installation

 Place the circulator in an upright position.  Place the unit on an even surface on a pad made of non-

flammable material

5.2. Bath fluids

Caution:

Carefully read the 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 calcification in the bath.

 Ferrous water can cause corrosion - even on stainless steel.  Chloric water can cause pitting corrosion.  Distilled and deionized water is unsuitable. Their special properties cause

corrosion in the bath, even in stainless steel.

Recommended bath fluids:

Bath fluid Temperature range soft/decalcified water 5 °C to 80 °C

JULABO bath fluids JULABO

Description Order Number 10 liters 8 940 124 8 940 100 8 940 102 5 liters 8 940 125 8 940 101 8 940 103 Temperature range °C -30 ... 80 40 ... 170 20 ...250 Flash point °C -- 284 270 Fire point °C -- 306 >360 Color light yellow clear light brown

Thermal

Thermal M

Thermal HS

JULABO Description

Thermal

H10

Thermal H20S

Thermal

H200 Order Number 10 liters 8 940 114 8 940 108 8 940 134 5 liters 8 940 115 8 940 109 8 940 135 Temperature range °C -20 ... 180 0 ... 220 60 ...200 Flash point °C 190 230 292 Fire point °C 216 274 334 Color clear light brown clear

See website for list of recommended bath fluids.

ATTENTION: The maximum permissible viscosity is 50 mm

/s.

Caution:

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

Use only nonacidic and noncorrosive bath fluids.

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

(much higher than recommended 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!

5.3. Temperature application to external systems

Caution: Securely attach all tubing to prevent slipping.

If the circulator is operated without external system, close the pump connector (24a) with the cap nut.

The circulator is used for temperature application to external, closed systems (loop circuit) with simultaneous temperature application in the circulator bath.

Connecting the external system

 Unscrew the collar nuts from the pump connector (24a).

 Slide the tubing onto the pump connector for feed (24a) and

return flow (24b) and secure with hose clamps.

  feed return

Preparations

5.1.1. Tubing Recommended tubing:

Order No. Length Temperature range 8 930 008 1 m CR® tubing 8 mm inner dia. -20 °C to 120 °C 8 930 010 1 m CR® tubing 10 mm inner dia. -20 °C to 120 °C 8 930 108 1 m Viton tubing 8 mm inner dia. -50 °C to 200 °C 8 930 110 1 m Viton tubing 10 mm inner dia. -50 °C to 200 °C 8 930 410 1 m Insulation for tubing 8 mm or

10 mm inner dia.

8 970 480 2 tubing clamps. size 1, tubing 8 mm inner dia. 8 970 481 2 tubing clamps. size 2, tubing 10 or 12 mm inner dia.

8 930 209 0.5 m 8 930 210 1.0 m 8 930 211 1.5 m 8 930 214 3.0 m 8 930 220 0.5 m 8 930 221 1.0 m 8 930 222 1.5 m 8 930 223 3.0 m

Metal tubing, triple insulated, M16x1 *

Metal tubing, insulated, M16x1 * -50 °C to +200 °C

-50 °C to 100 °C

-100 °C to +350 °C

*) Adapter for metal tubing M10x1 on M16x1 Order No. 8 970 444

Warning: Tubing:

At high working temperatures the tubing used for temperature application and cooling water supply represents a danger source. A damaged tubing line may cause hot bath fluid to be pumped out within a short time. This may result in:

 Burning of skin  Difficulties in breathing due to hot atmosphere

Safety recommendations

 Employ 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).  Preventive maintenance: Replace the tubing from time to time.

5.4. Filling / draining

Notice:

Pay attention to the thermal expansion of bath oil during heating to avoid overflowing of the liquid. Do not drain the bath fluid while it is hot! Check the temperature of the bath fluid prior to draining (by switching the unit on for a short moment, for example).

Always turn off the unit and disconnect the mains cable from the power source before cleaning the unit, or before moving the unit.

Store and dispose the used bath fluid according to the laws for environmental protection.

Filling

Take care that no liquid enters the interior of the circulator.

 Cooking in the Sous-Vide method

The recommended minimum filling level with water as bath fluid is 50 mm below the tank rim.

 Recommended maximum filling level with water as bath fluid:

30 mm below the tank rim

 Recommended maximum filling level with bath oils:

40 mm below the tank rim

 After filling, immerse the samples in the bath or place the lid on

the bath, in case the opening is not to be used.

 The circulator provides an early warning system for low level

(description – please refer to page 28) that may be triggered when changing samples in the bath.

Draining

 Turn the unit off with the mains switch.  Place the heating circulator near the rim of the table. Use a

suitable vessel as recipient for the bath fluid.

 Unscrew the drain plug on the front of the bath tank to drain the

bath.

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