Julabo LH 40, Presto LH 40 Operating Manual

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Page 1

19512761.doc Print date: 13.06.07

Operating Manual

High Dynamic Temperature System

 with integrated programmer

Presto

LH 40

Version: V45D-01

Printed in Germany Changes without prior notification reserved

1.951.2761BE4 03/07

Innovative Temperature Technology JULABO Labortechnik GmbH

77960 Seelbach / Germany  +49 (0) 7823 / 51-0

 +49 (0) 7823 / 24 91  info@julabo.de  www.julabo.de

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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 principles of operating and possibilities of our instruments. For optimum utilization of all functions, we recommend that you thoroughly study this manual prior to beginning operation.

Safety Warnings

Take care your unit is operated only by qualified persons. Make sure you read and understand all instructions and safety precautions listed in this manual before installing or operating your unit. If you have any questions concerning the operation of your unit or the information in this manual, contact JULABO.

Performance of installation, operation, or maintenance procedures other than those described in this manual may result in a hazardous situation and may void the manufacturer's warranty.

Transport the unit with care. Sudden jolts or drops may cause damages in the interior of the unit.

Observe all warning labels. Never remove warning labels.

Never operate damaged or leaking equipment. Never operate the unit without bath fluid in the bath. 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 empty the bath before moving the unit. Never operate equipment with damaged mains power cables. Refer service and repairs to a qualified technician.

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 described according to an alarm keyword. Read and follow these important instructions.

Warning:

Describes a possibly highly dangerous situation. If this is not avoided, 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 damage can 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.

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Presto

TABLE OF CONTENTS

1. OPERATING CONTROLS AND FUNCTIONAL ELEMENTS...............................4

2. QUALITY MANAGEMENT SYSTEM....................................................................8

3. UNPACKING AND CHECKING............................................................................8

4. DESCRIPTION.....................................................................................................8

4.1. The Presto® principle with closed external system...............................................9

5. PREPARATIONS...............................................................................................10

5.1. Bath liquids ........................................................................................................ 10

5.2. Tubing................................................................................................................13

5.3. Set up ................................................................................................................14

5.4. Connect the external consumer.........................................................................14

5.5. Power connection ..............................................................................................16

5.6. Filling .................................................................................................................16

5.6.1. Filling of external, closed systems..............................................................17

5.7. Degasifying........................................................................................................19

5.8. Draining .............................................................................................................20

6. OPERATING PROCEDURES............................................................................21

6.1. Switching on / Selecting the language...............................................................21

7. MANUAL OPERATION......................................................................................22

7.1. Start - Stop.........................................................................................................22

7.2. Direct setting of the working temperature ..........................................................23

7.3. Settings in the SET menu ..................................................................................23

7.3.1. Setting the working temperature................................................................23

7.3.2. Warning functions......................................................................................24

7.3.3. Setting the pump pressure stage...............................................................25

7.4. Setting the safety temperature (with shutdown function)...................................26

7.5. Internal / external control ...................................................................................28

8. MENU FUNCTIONS...........................................................................................28

8.1. Configuration .....................................................................................................30

8.2. Control parameters ............................................................................................ 33

8.3. Start of a profile .................................................................................................35

8.3.1. Interrupting a profile...................................................................................37

8.4. Integrated programmer ......................................................................................38

8.5. Analog inputs/outputs ........................................................................................41

8.6. Limits .................................................................................................................44

8.7. Interface.............................................................................................................44

8.8. Sensors..............................................................................................................45

8.9. Pump .................................................................................................................46

9. TROUBLESHOOTING GUIDE / ERROR MESSAGES ......................................47

10. SAFETY RECOMMENDATIONS .......................................................................49

11. ELECTRICAL CONNECTIONS..........................................................................50

12. REMOTE CONTROL .........................................................................................53

12.1. Setup for remote control....................................................................................53

12.2. Communication with a PC or a superordinated data system..............................53

12.3. List of commands...............................................................................................55

12.4. Status messages / error messages....................................................................58

13. MAINTAINING THE COOLING PERFORMANCE..............................................60

14. DISPOSAL OF THE UNIT..................................................................................60

15. CLEANING THE UNIT .......................................................................................61

16. RESPONSIBILITY OF THE OPERATOR...........................................................63

17. MAINTENANCE.................................................................................................63

18. TECHNICAL SPECIFICATIONS ........................................................................64

19. EC DECLARATION OF CONFORMITY.............................................................66

20. WARRANTY CONDITIONS ...............................................................................67

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Operating controls and functional elements

1. Operating controls and functional elements

Front view

1 Mains power switch,

illuminated

2 Local operating board

3 Socket board

4 Removable control module

5 Filling funnel (hinged)

6 Handle (foldaway)

7 Venting grid, removable

8 Drain with drain port

2 Local operating board

2.1

VFD-Info-Display

Header: Control indicators see section 2.2 Line 1: Actual value Int or Ext

To swap, press the key (see below)

Line 2: Working temp. setpoint, constantly S xxx.xx

or indication of the safety temperature (TANK)

Line 3: Miscellaneous values

To swap, press the key (see below)

or indication of the safety temperature (RES)

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Presto

2.2 Control indicators in the header: Heating / Cooling / Alarm / Remote control Temperature indication Internal or External actual value Temperature indication in °C or °F Display for the adjusted pump pressure stage (five grades),

adjustable via the key . Liquid level display (five grades)

for the reservoir.

2.3

Key to swap line 3 on the VFD

 ID xx Identification no. of control module RD  L xx Capacity in %  E xxx.xx or I xxx.xx Actual value (external or internal)  P x.xx Pump pressure in bar

Int

2.4

S 120.00 E 120.00

Key to swap line 1 on the VFD

 Actual value Int or Ext alternating with line 3

2.5

TANK 150

RES 80

Key to indicate the safety temperature on the VFD Line 2: TANK - Safety temperature in internal bath

Line 3: RES - Safety temperature in internal reservoir

2.6

Adjustable excess temperature protection (safety temperature) Used for setting the safety temperature in the internal bath, called "TANK" on the display

2.7

°C

130

180

220

Adjustable safety temperature. Used for setting the safety temperature in the internal reservoir, called "RES" on the display

2.8

Key for automatic filling and air purge of the unit as well as the connected external system.

3 Socket board

3.1 REG+E-PROG

Programmer input and temperature recorder output

3.2 STAND-BY

Stand-by input (for external emergency switch-off)

3.3 ALARM

Alarm output (for external alarm signal)

3.4 EXT. Pt100

Connector for external measurement and control sensor

3.5 SERIAL Interface RS232/RS485

3.6 RD

Connector: control cable of control module RD

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Operating controls and functional elements

4 Control module RD

4.0

Setp: 120.00°C

IntAct 21.00°C

ExtAct: 20.00°C

Control: Intern

DIALOG-DISPLAY (LCD) Standard indication Line 1: Setpoint in °C Line 2: Internal actual value in °C Line 3: External actual value in °C Line 4: Control type: internal / external control

Indicating messages (e. g. warnings)

4.1

Start / stop key To switch the circulation pump, heating element and cooling unit.

4.2

>Setp.: 120.00°C

Overt.:255.00°C

Subtmp:-55.00°C St.Pump: 2

SET Menu Key - Indicating and setting setpoint values Set the following values:

in Line 1: the working temperature Setp.:

Line 2: the high temperature limit Overt.: Line 3: the low temperature limit Subtmp: Line 4: the pump pressure stage St.Pump:

4.3

Control type: internal / external control

To swap, the unit has to be in the STOP MODE. Indicated in line 4 on the DIALOG-DISPLAY (LCD)

4.3

>Configuration

Control param. Profile Start

Int. Programmer

MENU key - for selecting the menu functions

(Menu see page 28)

4.5

Cursor keys - Select menu items

4.6

P-key Selecting parameters

4.7

ESC

Escape key 1) Cancel entries

2) Return to a higher menu level

4.8

Enter key 1) Store value / parameter

2) Next lower menu level

4.9 ....

Numeric keypad: numerals 0 to 9; minus / decimal point

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Presto

Rear

Control connector 230 V / max. 0.1 A

11 4 Mains circuit breakers

(resettable) 16 A

A M P

F4F2

F1 and F3  Compressor F2 and F4 Heater, Pump

12 Mains power cable with

plug

13 + 14

Pump connectors Return Feed M16x1

Overflow connector M16x1

Connector for expansion vessel M16x1

Castor (at the back)

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Quality Management System

2. Quality Management System

Quality Management System

ISO 9001

2000

The JULABO Quality Management System: Development, production and distribution of temperature application instruments for research and industries conform to the requirements according to DIN EN ISO 9001:2000. Certificate Registration No. 01 100044846

3. Unpacking and checking

Unpack the instrument and accessories and check for damages incurred during transit. These should be reported to the responsible carrier, railway, or postal authority, and a request for a damage report should be made. 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.

4. Description

Presto®high dynamic temperature systems have been designed for external temperature application to liquids. They offer rapid heating and cooling, wide working temperature ranges without changing fluids as well as highest performance with a small footprint. Besides the cooling unit, the main functional elements are the heater, circulation pump and control electronics. Via an external Pt100 control sensor, a self-optimizing, electronic proportional temperature control (PID characteristic) adapts the heat supplied to the thermal requirements of the external system.  The high pump capacity can be reduced by regulating the motor speed in five grades. It may

thus be adapted to sensitive vessels.

 The cooling unit may be cooled with air.  Setting is rapid and simple using the splash-proof keypads. The operating elements consist

of the local operating board with a bright VFD-Info-Display, as well as the removable control module RD connected with a cable. The microprocessor technology allows four temperature values to be stored and indicated on the DIALOG-DISPLAY (LCD) of the control module RD: working temperature, high and low temperature warning limits as well as pump pressure stage.

 The digital RS232 / RS485 port permits modern process engineering without additional

interface.

 The excess temperature protection (safety temperature) according to DIN 12 876-1-2000, a

safety feature functioning independent of the regulator circuit, is adjusted and indicated via the VFD-Info-Display.

 The integrated programmer allows programming of setpoint and time values for six

temperature profiles.

 The following analog sockets are available:

- The REG+E-PROG socket for setpoint selection via an external, analog programmer. At the same time, this socket provides three analog outputs for temperature recorders.

- The external Pt100 socket for external control.

- The alarm output for an external signal.

- The stand-by input for external emergency switch-off.

 Presto®high dynamic temperature systems conform to the safety requirements specified by

DIN 12 876-1-2000 (safety class III), as well as DIN 58 966, and the guideline for first voltage range EN 61010-1.

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Presto

4.1. The Presto® principle with closed external system

(e.g. double-sided glass vessel).

Operating:

The operation of the temperature system and the indication is effected via the local control panel (2) and the removable operating device RD(4).

Filling :

First connect the external consumer. The menu option >Mode< is set on >Fill<. The unit is filled at the hinged filling funnel (5) via the internal reservoir (5a). The bath liquid spreads from here into the external reservoir (16a) and into the heat exchanger (20). The filling pipe (25) represents narrows. Therefore the filling should be done slowly. The air from the heat exchanger (20) escapes via the venting valve. In a first step approximately 2,6 liters of bath liquid is filled in until

the level indication indicates 3 or 4 batons (see –Filling volume- page 16). Then, by pressing

the key an automatic filling and venting mode with activation of the circulating pump (23) is started. In intervals the tempering liquid is pumped via connection (14) into the external system (33) and led back into the heat exchanger (20) via connection (13). At the end of the filling process the menu option >Mode< has to be set on >Sys close<.

Working:

In case of a closed external system the filling pipe (25) remains open and allows a change in volume of the bath liquid caused by temperature during operation. In case of emergency it has to be possible that the expanding bath liquid can drain off at the overflow (15) into a suitable vessel. If necessary the external reservoir (16a) can be mounted at connection (16).

Theair cooled temperature system is started with the key . The heating (21), the cooling aggregate (22) and the circulating pump (23) start according to the desired adjustments at the operating device RD (4). In the line to the pumpe exit (14) the pump pressure (29) and the actual temperature of the internal control sensor (28a) is permanently measured. If the temperature control has to be effected externally a Pt100 external sensor (28b) has to be connected and switched over to external control at the operating device RD(4).

Safety:

In the internal reservoir (5a) there are the level sensor (26) as well as a safety sensor (27b). The safety sensor (27a) as high temperature protection according to DIN 12876 is located directly at the heater (21). If the external circuit is interrupted (e.g. with a shut-off valve), an emergency circuit is maintained via an internal Bypass (30).

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Preparations

5. Preparations

5.1. Bath liquids

Caution:

Carefully read the safety data sheet of the bath liquid used, particulary with regard to the fire piont! If a bath fluid with a fire point of 65 °C is used, only supervised operation is possible.

Recommended bath liquids for external, c l o se d s ys t e m s :

Order No. Bath liquid Temperature

range

[°C]

Flash point

[°C]

fire point

[°C]

Color Quantity

[liters] 8 940.106 Thermal H5S -40 ... 250 >110 >130 10 8 940 107 Thermal H5S -40 ... 250 >110 >130

slightly

brown

5 8 940 122 Thermal HL45 -45 ... 250 >121 >162 transparent 10 8 940 123 Thermal HL45 -45 ... 250 >121 >162 transparent 5 8 940 120 Thermal HL80 -85 ... 170 >63 >112 transparent 10 8 940 121 Thermal HL80 -85 ... 170 >63 >112 transparent 5

Warning: Thermal H5S, Thermal HL 45, Thermal HL 80:

These bath liquids may only be used in e xt e r n a l , c l os e d s ys t e m s (loop circuits) up to the indicated max. working temperature.

Caution:

Please contact JULABO before using other than recommended bath liquids. JULABO takes no responsibility for damages caused by the selection of an unsuitable bath liquid. Unsuitable bath liquids are liquids which e.g.  are very highly viscous

(much higher than 50 mm2x s-1at the respective working temperature)

 are of low viscosity and have creep capacities

 have corrosive characteristics or  tend to cracking.

No liability for use of other bath liquids!

ATTENTION: The maximum permissible viscosity is 50 mm2x s

-1

Caution:

The use of water in purified or unpurified form is not allowed. Examples: Tap water, distilled water, water-glycol mixture, CaCl2-brine

Page 11

Presto

Important notice concerning the recommended bath liquids:

Bath liquids with a range of application above the fire point ? This temperature system is mainly operated in a closed external system (loop

circuit). The contact of the bath liquid with atmospheric oxygen only takes place in the internal reservoir, which is not located directly in the termperature circuit.

A safety device supervises and controls the the temperature in the internal reservoir.

 The temperature of the bath liquid is maintained constant at approx. +20°C  The safety device with an adjustable temperature value >RES< works

independently from the control circuit. When actuating this safety device (too much hot fluid streams into the internal reservoir) the temperature system is switched off all-polo and permanently.

Adjust the safety temperature >RES< at at least 20 K below the fire point of the bath liquid.

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Preparations

Diagram 1: JULABO Thermal oils Change in volume in dependence on the temperature of bath liquid.

Examples:

Rough estimate for LH45 (2,6 liters) with an external closed system (2,4 liters).

Example A: Filling quantity at ambient temperature 5 liters

Intended working temperature range -40 °C bis +250 °C Change in volume caused by temperature 1,75 liters Here an external expansion vessel is required (Order no.: 8 970 830)

Example B: Filling quantity at ambient temperature 5 liters

Intended working temperature range +20 °C bis +200 °C Change in volume caused by temperature 1,2 liters Here no external expansion vessel is required

(see table „Filling volume“ Page 16).

Page 13

Presto

5.2. Tubing

Recommended tubing:

Metal tubing, triple insulated, M16x1, Temperature range -100 °C ... +350 °C

Order No. Length 8 930 209

8 930 210 8 930 211 8 930 214

0.5 m

1.0 m

1.5 m

3.0 m

Metal tubing, insulated, M16x1, Temperature range -50 °C ... +200 °C

Order No. Length 8 930 220

8 930 221 8 930 222 8 930 223

0.5 m

1.0 m

1.5 m

3.0 m

Pressure max. 6.0 bar at +20 °C

4.6 bar at +200 °C

3.8 bar at +350 °C

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 liquid to be pumped out within a short time.

This may result in:

 Fire hazard  Explosion hazard  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).

Page 14

Preparations

5.3. Set up

The Presto®temperature systems may be placed on or underneath a lab bench.

 Place the unit on an even surface on a pad made of

non-flammable material. Lift the handle (6) and using the castor (19) move the unit to the intended location.

 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 setting it up. This will allow any oil that has accumulated laterally during transport to flow back down thus ensuring maximum cooling performance of the compressor.

 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 radiates to the environment. (Max. permissible ambient temperature: 40 °C). With regard to a disturbance in the cooling loop (leakage), the guideline EN 378 prescribes a certain room space to be available for each kg of refrigerant. The necessary amount of refrigerant is specified on the type plate. > For 0.48 kg of refrigerant R404A, a room space of 1 m

is required.

5.4. Connect the external consumer

The temperature systems are designed for temperature application to closed, external systems (loop circuits). The temperature application of external, open systems is also possible. However, this requires a series of special measures which Julabo cannot influence like e.g. the protection of the bath liquid from environmental influences such as oxygen and air humidity. To profit from the system's rapid performance, ensure the tubing line between the temperature system and the connected external system is as short as only possible.

Caution:

Fasten tubing to prevent slipping.

Connecting the external system: Temperature application to external, closed systems.

 Remove the cap nuts from the pump connectors (13, 14) and using

tubing connect the external system (M16x1 / wrench 19 mm). To prevent the formation of bubbles in the loop circuit, the pressure line (13) is to be connected to the lower nozzle of the external system. Also see the description on page 9

Temperature application to external, open systems.

 Remove the cap nuts from the pump connectors (13, 14) and using

tubing connect the external system (M16x1 / wrench 19 mm). Also see the description on page 9.

Page 15

Presto

Important:

Connect a piece of tubing to the overflow connector (15) and drain into a suitable vessel. (M16x1 / wrench 19 mm), which always has to be placed

lower thant the exit „Overflow“.

 If required, the connector (16) may be

used for connecting an expansion vessel. (M16x1 / wrench 19 mm)

 Close the expansion vessel with the

cover.

Order No. 8 970 830 Expansion vessel

The use of an expansion vessel is depending on the highest temperature and the volume of the bath liquid in the loop circuit. (see diagram 1 page 12).

Note:

At the desired highest temperature, drain overflowing bath liquid into a suitable vessel via the connector (15). If at the desired lowest temperature, low liquid level alarm is not triggered, there is no need to use an external expansion vessel.

Notice:

If an expansion vessel is not used, make sure the connector (16) is closed with a cap nut. If an external expansion vessel is mounted later, a part of the bath liquid should be drained before (see chapter Emptying on page 20). It might be helpful to put the castors at the back on a base which is approximately 10-15 mm high. So the bath fluid can be collected in the front part of the internal reservoir.

Warning:

An external expansion vessel is heated up by the wam outgoing air, especially in small rooms or if there is not enough distance between the wall and the unit.

In this case only bath liquids with a fire point of 100 °C are allowed to be used.

Page 16

Preparations

5.5. Power connection

Caution:

Only connect the unit to a power socket with earthing contact

(PE – protective earth)! We disclaim all liability for damage caused by incorrect line voltages!

Check to make sure that the line voltage matches the supply voltage specified on the identification plate. Deviations of ±10 % are permissible

 Connect the mains plug (12) to the earthed mains socket !

5.6. Filling

Caution:

Take care of the bath liquid's changing volume varying with the working temperature of the Presto®temperature system.

Guideline:

A volume change of 12 % per 100 °C temperature variation is to be considered.. The maximum change in volume in the internal reservoir for the different models is included in the table below.

Filling is performed in two sections. In section 2, the temperature system starts an automatic filling process enabling convenient filling.

Notice:

First connect the external system! (see page 14)

Example: LH 40 Indication max: 3,2 liters

Indication min: 2,6 liters

Take care no bath liquid enters the interior of the unit. Filling volume LH40

(without external approx. liters system connected) 2,6 ... 4,0

- in the heat exchanger 2,6

- in the internal reservoir 1,4

Recommendation:

For filling, use for example an approx. 2 liters measuring jug. Select the bath liquid suitable for the temperature application

task. (see also diagram 1 page 12). For temperature applications to +250 °C fill up to marker "HT",

for applications to for example –50 °C fill up to marker "TT".

(only important with closed, external system)

Page 17

Presto

5.6.1. Filling of external, closed systems

ALARM

CODE 14

Section 1

 Connect the unit to a mains power socket (see page 16)

and turn on the unit with the mains power switch (1). During the self-test all segments of the VFD-Info-Display, all control indicators and the DIALOG-DISPLAY light up. After the self-test, the VFD-Info-Display signals low liquid level alarm. >CODE 14< and a signal tone sounds.

 Press (5.1) to open the filling funnel (5). Slowly pour in bath

liquid into the opening (5.2) and observe the liquid level display.

Notice: Filling quantity [liters] The external system stands

- higher than Presto

2,6 l

- lower than Presto

2,6 l + Filling quantity ext. system

1.0 Watch the level indication . During the filling

procedure 3 or 4 steps of the level indication can light-up, in the end they should light-up.

Section 2

Pump >Pump OFF

Mode:Sys close

 Turn the unit off and on again with the mains power switch (1).

Wait until the self-test is completed.

 Press the key to start the automatic filling process.

As soon as the pump pressure indication in the 3rdline of the VFDInfo-Display

(„P X.XX“) has scaled up to at least 0.1 bar, the tempering liquid is pumped into the external system. In intervals of 10 seconds bath liquid is pumped into the external system - air purge is carried out in the breaks.

Notice: The filling mode has to stay activated for at least 5 minutes in order to fully de-air the system.

 The liquid level in the unit falls.

In case of a WARNING >CODE 40< again slowly fill in tempering liquid into the opening (5.2). In case of a ALARM >CODE 14< return to the final condition of section 1 and restart section 2.

 If the liquid level display remains unchanged after some minutes,

complete filling according to the application task. See page 16 - marker "HT" or "TT".

 Press to finish the automatic filling process.  In the sub >Pump< the unit has to be set on

>Mode:< >sys close< . (see page 18 Adjusting Mode: )

 The unit is now ready for operation .

Page 18

Preparations

Adjusting Mode:

 Notice concerning the filling

The temperature system was emptied last, therefore the menu option >Mode< now still stands on >drain<. In the configuration of this unit the >Mode< >fill< means the same as >drain< and therefore does not have to be adjusted.

Explanation of terms:

>Mode: sys close< stands for closed, external system (Presto®principle page 9)

Press the respective keys in the following order:

1. MENUE key 1x

2. Cursor key up to Submenu "Pump"

3. Enter key 1x

4. Cursor key 1x up to "Pump"

5. P- key sys open / sys close / fill / drain

6. Enter key 1x

7. Escape key

ESC

The DIALOG-DISPLAY (LCD) helps to follow up the individual settings.

The VFD-Info Display shows the recently chosen operating status for approx. 3 seconds.

Switch over to > sys open < OPEN SYSTEN Switch over to > sys close < CLOSED SYSTEM Switch over to > fill < FILL SYSTEM Switch over to >drain< DRAIN SYSTEM

Page 19

Presto

5.7. Degasifying

S 180.00

-DEGAS-

Setp: 180.00°C

IntAct 78.00°C

ExtAct: --.--°C

Control: Intern

degasing activ

If the temperature system is operated in a closed, external consumer, >Mode: sys close<, an automatic degasifying is carried out after the start.. During the degasifying unwelcome components of the bath liquid are are drawn off . Examples:

 Air bubbles which were enclosed in the bath liquid during

the filling for the unit.

 Slightly volutile components which are eventually in the

fluid.

 Eventually existing water components, which reached the

bath liquid during the storage.

When operating in the >Mode: sys open< there is no need for degasifying, because the unwelcome components can escape via the open bath tank.

The automatic degasifying is a part of the program in the unit, which is always active in the background. Experience shows that the activity is only noticed after a first or new filling of the unit. During the heating-up phase, e.g. to a working temperature of 180°C, the VFD-Info-Display shows >DEGAS<. Parallely to this, in line 4 in the DIALOG-DISPLAY the message >Degasifying active< is inserted. In this phase the temperature rise is stopped, the pump motor and the ventilation valve are activated alternately (audible). During the heating-up phase this degasifying mode can be repeated with the most different temperatures. The automatic degasifying can be stopped by :

Operating the key or adjusting the set temperature on at least 50°C lower than the current set temperature.

Caution:

With different substances the change-over to the steam phase and therefore also an enormous change of volume is carried out very quickly. The fluid, for which there is no more room in the internal reservoir, now has to drain off controlled via the overflow.

Important:

Connect a piece of tubing to the overflow connector (15) and drain into a suitable vessel. (min. 2 liters) (M16x1 / wrench 19 mm), which

always has to be placed lower than the exit „Overflow“

Recommendation on LH40 For this unit an external expansion vessel is recommended. (see page 15) Sometimes the internal reservoir is not able to take up the quickly expanding fluid. In fact, via the overflow there is a correct draining, however, if the liquid is needed again after the expansion phase, the unit can give low level alarm. The „automatic degasifying“ is stopped.

Page 20

Preparations

5.8. Draining

Notice:

Exercise caution when emptying hot bath liquids! Store and dispose the used bath liquid according to the laws for environmental protection.

S 20.00 P x.xx

Pump

>Pump OFF

Mode: drain

Draining

 Turn on the temperature system with the mains power

switch or press the stop key to make the unit enter the STOP-

MODE.

 In the submenu >Pump<, set the menu items >Mode< to

>drain<.

(see page 18 Adjusting Mode: )

 The reset to another mode can only take place after the

next filling.

Reason: During the >ALARM – CODE 14< there is no possibility for access to the menu functions !

 Pull the venting grid (8.1) to the front and remove.  Place a suitable vessel (8.2) for accepting the used bath

liquid underneath the drain.

 Slide a short piece of tubing onto the drain port and hold

the end into the vessel.

 Unscrew the drain screw by some turns.  The liquid level in the unit falls.

Now the VFD-Display of the unit should show low level, WARNING >CODE 40< and then ALARM >CODE 14<.

Press enter to quit the audible signal.

 Drain the external system:

At the upper nozzle of the external system, disconnect the tubing to the pump connector "return" (14) until an air stream moves in. (see sketch on page 14)

 Tighten the drain screw after draining the unit.

 The internal reservoir should additionally be emptied via the

connection for the expansion vessel (16) on the rear side of the temperature system. The unit can be lifted up by 4-5 cm by using the handle (6)

(Cleaning the unit see page 61)

Page 21

Presto

6. Operating procedures

6.1. Switching on / Selecting the language

JULABO

P R E S T O

V1.45-1

Switching on:  The unit is operated by pressing the mains power switch

(1). The integrated pilot lamp illuminates.

 During the self-test all segments of the VFD-Info-Display,

all control indicators and the DIALOG-DISPLAY light up. Then the software version number (example: V1.45-1) appears for a short moment and the message "OFF" indicates the unit is ready to operate.

 Message >WAIT< when adjusting >Mode: sys close<:.

During the message >WAIT< the ventilation valve is opened for 10 seconds. So, the air which has eventually been collected during the standstill, can escape.

 The unit returns to the previous operating mode that was

active before it was turned off:

keypad control mode

(manual operation via the unit itself/RD)

remote control mode

(operation via PC).

Selecting the language:

There are two options for the language of the DIALOGDISPLAY (LCD): German or English. Select the desired language in the MENU level under the submenu >Configuration.

Soll: 20.00°C IntIst xxx.00°C ExtIst: Regelung:

>Konfiguration

Regelparameter

Konfiguration

Identif. xxxxx

Sollwert xxxxx

Autostart xxx

Standby xxxx

>Sprache xxxxxxx

Setp.: 20.00°C

IntAct xxx.xx°C

ExtAct: xxx.xx°C

Control: intern

Press the respective keys in the following order:

1. MENU key 1x

2. Enter key 1x

3. Cursor key up to Submenu "Sprache/Language"

4. P-key 1x

5. Enter key 1x

6. Escape key

ESC

The DIALOG-DISPLAY (LCD) helps to follow up the individual settings (example: swap the language from German to English).

Page 22

Manual operation

7. Manual operation

7.1. Start - Stop

Setp.: 20.00°C IntAct 21.00°C ExtAct: --.--°C Control: Intern

S 20 .00

P x.xx

Start:

 Press the start/stop key .

The actual bath temperature is displayed. For approx. 3 seconds the VFD-Info-Display shows the

adjusted >Mode< . Adjustment > sys open <  OPEN SYSTEM Adjustment > sys close <  CLOSED SYSTEM

The temperature system runs.

Notice:

The message >SELECT SYSTEM<is a demand to make an adjustment in the menu >Pump< according to the connected system. The insertion is effected cyclicly until the adustment has been made (see page 18 Adjusting Mode: )

In the >Mode< > fill < bzw. >drain<>SELECT SYSTEM< is shown when starting.



Notic: For physical reasons, refrigeration units provide full cooling performance only after some minutes. After the start up to 5 minutes can go by, until the cooling capacity is given.

Setp.: 20.00°C

IntAct 21.00°C ExtAct: --.--°C Control: Intern

Stop-Mode

S 20.0 0

ID 0

Stop:

 Press the start/stop key .

The VFD indicates "OFF" and the message STOP-MODE flashes in line 4 on the LCD.



The unit also enters the safe operating state "OFF" after a mains power interruptance. The temperature values entered via the keypad remain in memory. With the temperature system in keypad control mode, press the start/stop key to restart operation. With the instrument in remote control mode, the personal computer must first resend the parameters set via the interface before the temperature system may be restarted.

Page 23

Presto

7.2. Direct setting of the working temperature

Setp.: 20.00°C IntAct 21.00°C ExtAct: --.--°C Control: Intern

This setting may be carried out with the temperature system being in operating state Start or Stop!

 The value previously set appears on the DIALOG-

DISPLAY (LCD) (example: 20.00 °C). A flashing segment indicates that a value needs to be entered.

 Use the keypad to enter the new value and press enter

to store the selected value.

(examples: 120.00 °C; 228.50 °C; -15.00 °C).

7.3. Settings in the SET menu

Setp.: 120.00°C

Overt.:255.00°C

Subtmp:-55.00°C

St.Pump: 2

 Press the key to call up the SET menu. It is then

indicated on the DIALOG-DISPLAY (LCD). Set the following values:

in Line 1: the working temperature in °C Setp.:

Line 2: the high temperature limit in °C Overt.: Line 3: the low temperature limit in °C Subtmp: Line 4: the pump pressure stage St.Pump:

 Enter the desired values via the keypad. Settings may be

carried out with the temperature system being in operating state Start or Stop!

 Use the cursors to swap the lines.

 Press escape

ESC

to quit the SET menu.

7.3.1. Setting the working temperature

>Setp.: 200.00°C

Overt.: 255.00°C

Suptmp: -55.00°C

St.Pump: 2

>Setp.: 120.00°C

Overt.:255.00°C

Subtmp:-55.00°C St.Pump: 2

>Setp.: Setting the working temperature

 Setting in line 1.

The value previously set appears on the DIALOGDISPLAY (LCD) (example: 100.00 °C). A flashing segment indicates that a value needs to be entered.

 Use the keypad to enter the new value

(examples: 120.00 °C; 228.50 °C; -15.00 °C).

 Press enter to store the selected value.

Page 24

Manual operation

7.3.2. Warning functions



  

The high and low temperature warning functions accompany the working temperature value. An audible signal sounds in intervals when the actual temperature exceeds one of the set limits (patented). The corresponding message appears in line 4 on the DIALOG-DISPLAY (LCD).

Setp.: 120.00°C

>Overt.:130.00°C

Subtmp:-55.00°C St.Pump: 2

>Overt: Setting the high temperature limit

 Setting in line 2.

The value previously set appears on the DIALOGDISPLAY (LCD). A flashing segment indicates that a value needs to be entered.

 Use the keypad to enter the new value

(examples: 130.00 °C; -13.00 °C).

 Press enter to store the selected value.

Setp.: 120.00°C

Overt.:130.00°C

>Subtmp:110.00°C

St.Pump: 2

>Subtmp: Setting the low temperature limit

 Setting in line 3.

The value previously set appears on the DIALOGDISPLAY (LCD). A flashing segment indicates that a value needs to be entered.

 Use the keypad to enter the new value

(examples: 110.00 °C; -17.00 °C).

 Press enter to store the selected value.



Note:

The warning functions will only be triggered when the actual bath temperature, after start from the "OFF" or "rOFF" mode, lies within the set limits for 3 seconds.

Example:

Setp: 120.00°C

IntAct 130.50°C

ExtAct: --.--°C

Control: Intern

Excess temp.

150

130 120 110

°C

The corresponding message appears in line 4 on the DIALOGDISPLAY (LCD).

Page 25

Presto

7.3.3. Setting the pump pressure stage

The pressure of the circulation pump is adjustable in five grades. After setting, the VFD-Info-Display indicates the corresponding value.

Setp.: 120.00°C

Overt.:130.00°C

Subtmp:110.00°C

>St.Pump: 4

>St.Pump: Setting the pump pressure stage

 Setting in line 4.

The value previously set appears on the DIALOGDISPLAY (LCD). A flashing segment indicates that a value needs to be entered.

 Use the keypad to enter the new value

(example: 4).

 Press enter to store the selected value.



Note: The mechanical rotation of the circulation pump produces heat that is radiated into the bath liquid. The lowest working temperature may thus only be reached if the pump pressure is set to grade 1.

Page 26

Manual operation

7.4. Setting the safety temperature (with shutdown function)

TANK 150

RES 10 0

°C

130

180

220

°C

160

240

320

ALARM

CODE 14

ALARM!

IntAct: xx.xx°C

ExtAct: --.--°C

Temp/level alarm

This safety feature functions independent of the regulator circuit. When the temperature of the bath liquid has reached the safety temperature, a complete shutdown of the heater and pump is effected.

Safety temperature in the heat exchanger >TANK<

(excess temperature protection)

 Press the key to indicate the safety temperature value

in line 2 >TANK< on the VFD-Info-Display and using a screwdriver simultaneously turn the setting screw to the desired value (example: 150 °C).

Setting range: 0 °C to 320 °C

in 2 °C steps

The alarm is indicated by optical and audible signals (continuous tone).

The error messages opposite appear on the DIALOG-DISPLAY (LCD) and VFD-Info-Display.

ALARM

CODE 13

ALARM!

IntAct: xx.xx°C

ExtAct: --.--°C

RESERVOIR

Safety temperature in the internal reservoir >RES<

This supplementary safety installation supervises and controls the temperature of the bath liquid in the internal reservoir.

 Press the key to indicate the safety temperature value

in line 3 >RES< on the VFD-Info-Display and using a screwdriver simultaneously turn the setting screw to the desired value (example: 100 °C).

Setting range: 10 °C to 220 °C

in 2 °C steps

The alarm is indicated by optical and audible signals (continuous tone). The error messages opposite appear on the DIALOG-DISPLAY (LCD) and VFD-Info-Display.

Page 27

Presto



 Press enter to quit the audible signal.

 After eliminating the malfunction, press the mains power

switch off and on again to cancel the alarm state.

Warning:

Recommendation for external, closed systems: (see page 9)

 Set the safety temperature >TANK< 15 °C above the working temperature

setpoint.

 The safety temperature value >RES<should be set at least 25 °C below the

fire point of the bath liquid used.

Important:

From time to time the safety device has to be checked. With a screwdriver turn back the adjustable excess temperature protection until the shut-down point (actual temperature). After eliminating the malfunction, press the mains power switch off and on again to cancel the alarm state.

Page 28

Menu functions

7.5. Internal / external control

ext. Pt100

The temperature system offers the possibility of internal temperature control in the internal bath or external control directly in an external system.

Setup for external control:

Connect a Pt100 sensor to the socket "EXT" of the Presto

temperature system, if necessary perform a calibration using the "ATC Ext:" function (see page 45) and then securely fix the sensor in the external system.

S xx.x x

ID 0

ESC

Setp: 120.00°C

IntAct 21.00°C

ExtAct: 20.00°C

Control: Intern



To swap internal to external control:

 Press the key in operating state "OFF" to select the

control type.

 The DIALOG-DISPLAY (LCD) indicates the effective

control type in line 4 >Control: intern< or > Control: extern<

Setp: 120.00°C

IntAct 21.00°C

ExtAct: 20.00°C

Control: Extern



Int 

S 120. 00

E 20.0 0



 Press the start/stop key .

Temperature indication:

 The DIALOG-DISPLAY (LCD)

simultaneously indicates both actual temperatures.

 The VFD-Info-Display

indicates the actual temperature in line 1. In the header the corresponding symbol >Int< or >Ext< is illuminated.

Press the key to swap the display.

 It is useful, to set line 3 to show the actual temperature

>E xx.xx°C< by pressing the key .

Caution:

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

8. Menu functions

 Press the MENU key to enter the menu level.  Use the up/down cursor keys to select the desired

submenu and press enter .

 Press escape to return to the previous menu level.

Page 29

Presto

Page 30

Menu functions

8.1. Configuration

>Configuration

Controlparam. Profile Start Int.Programmer Inputs/Outputs Limits Interface Temp.Sensor Pump

Configuration Identif. xxxxx Setpoint xxxxx Autostart xxx Standby xxxx Language xxxxxx IdentNo x

By means of the configuration functions, operation of the instrument can be optimized for the current application.

 Press enter to select the configuration submenu.  Use the up/down cursor keys to select the

desired option. A flashing line indicates that a value needs to be entered.

 Press the P-key to select the parameter and press

enter .

 Press escape to return the previous menu level.

> Identification

When performing an identification for the controlled system (temperature application system), the control parameters Xp, Tn and Tv will be automatically determined and stored.

Possible parameters: off - no identification.

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

once - single identification

The instrument performs a single identification of the controlled system after start. After the identification process the parameter is automatically set to "off".

always - continual identification

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

Important:

For physical reasons, refrigeration units provide full cooling performance only after some minutes. During identification this is given consideration by waiting for 5 minutes after switch-on.

Page 31

Presto

Note:

Requirement for an identification of the controlled system:  The temperature system must heat to a setpoint

temperature at least 10 °C above the previous setpoint using the adjusted heating power.

 When the adjusted control parameters Xp, Tn and Tv are

too high, this requirement may not be given with respect to on how much the setpoint temperature has to change. In this case, prior to carrying out an identification in the "OFF" state, set the control parameters to lower values.

Recommended setting for internal control:

Xp = 1.0 °C Tn = 80 s Tv = 8 s

Setp.: 50.00°C IntAct: 50.00°C ExtAct: 50.00°C Control: intern

Eprog: 50.00°C

IntAct: 50.00°C

Power: 50 %

Control: intern

Rs232: 50.00°C

IntAct: 50.00°C

Power: 50 %

Control: intern

S xx. xx

ID 0

REG+E-PROG

SERIAL

> Setpoint

The instrument provides three possibilities for setpoint selection. The active mode is indicated on the DIALOGDISPLAY (LCD). The control indicator >R< (REMOTE) is illuminated in the header of the VFD-Info-Display if setpoint selection is effected via the EPROG or SERIAL input.

Possible parameters:

keyb- via keypad (Setp.:) or via the integrated programmer.

eprog - via the analog interface REG+E-PROG (3.1) through

an external programmer.

RS232 - via the serial RS232/RS485 interface (3.5) through a

PC or superordinated data system.

>Autostart 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. on the VFD-Info-Display. A complete shutdown of the main functional elements such as heater and circulation pump is effected simultaneously. Only with setpoint adjustment the AUTOSTART-function can be executed via >Taste< and >EPROG< (see above).

Page 32

Menu functions

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.

Possible parameters:

on - AUTOSTART on off - AUTOSTART 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.

Take care you fully observe the safety and warning functions of the instrument. If the setpoint is given via the serial interface, no AUTOSTART is possible.

STAND-BY

>Stand-by input

External stand-by for emergency switch-off (connector - see page 52)

Possible parameters:

no - stand-by input is ignored yes - stand-by input is active

> Language

There are two options for the language of the DIALOGDISPLAY (LCD): German or English.

Possible parameters:

German (deutsch) English (engl).

S xx.x x

ID 0



>IdentNo

The identification number identifies the removable control module RD. Assign identification numbers if more than one Presto

temperature system is available.

Adjustable parameters:

0 ... 999

Indicated also on the VFD-Info-Display.

Page 33

Presto

8.2. Control parameters

Xp =

When performing an identification for the controlled system (temperature applications system) (see page 30), the control parameters Xp, Tn, Tv and Xpu will be automatically determined and stored.

Each parameter may be manually set via the keypad if necessary, to allow optimum control performance.

 Press enter to select the submenu "control

parameters".

 Use the up/down cursor keys to select the

desired option. A flashing segment indicates that a new value needs to be entered.

 Use the numerals to set the value and then set with enter

(example: Xp = 2.5 °C).

 or at >DynInt<

Press the P-key to select the parameter and press enter .

 Press escape to return to the previous menu level.

Proportional range >Xp<

The proportional range is the range below the selected temperature value in wich the 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.

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.

Proportional range >Xpu<

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

Page 34

Menu functions

°C

aperiod.

standard

setpoint

temp. stability

°C

aperiod.

standard

temperature ramp

temp. stability

>DynInt< - Dynamics

This parameter affects the march of temperature only in case of internal control (see page 28)

Adjustable parameter: standard The temperature rises quicker, however

can overshoot up to 5 %. If a ramp is defined, the march of temperature often follows this ramp.

aperiod. The temperature rises chronologically

without overshoot.

With both adjustments a sufficient temperature stability is reached after approximately the same time.

°C

setpoint

Temp. intern

Temp. extern

>CoSpeed< 0 up to 5 This parameter affects the march temperature only in

case of external control (see page 28). The adjustment affects the calculation of the control parameter when identifying and so the control course.

Optimization instructions for the PID control parameters:

optimum setting

°C

The heat-up curve reveals inappropriate control settings.

Inappropriate settings may produce the following heat-up curves:

Xp too low

°C

Tv/Tn too low

°C

Xp too high or Tv too high

°C

Tv/Tn too high or Xp too high

°C

Page 35

Presto

8.3. Start of a profile

S xx.x x

ID 0

S 100.00

ID 0

The start menu of the integrated programmer allows calling up and defined starting of one of six previously stored temperature profiles. The profiles are started manually or via the integrated timer.

There are two possibilities for manually starting a program:

1. Starting a profile from the OFF state: The temperature system switches back to the OFF state at the end of the program.

2. Starting a profile from the operating state. The temperature system is started with the start key ,

and the bath is heated to the desired temperature, for example 100 °C. At the end of the program, the programmer switches to the operating state and holds the bath temperature stable at 100.00 °C.

 Press enter to select the submenu "Profile Start".  Use the up/down cursor keys to select the

desired option. A flashing segment indicates that a number needs to be

entered.

Start Profile 0 to 5 at Step 0 to 60 Loops 1 to 99

Enter the desired number and set each entry with enter

Start no / yes  (manual start)

time  (via integrated timer) A flashing line indicates that a parameter needs to be entered.

Press the P-key to select the respective parameter and press enter .

Page 36

Menu functions

Example: hour.min 6:00 h

 When selecting the parameter time, a new menu level is

called up for entry of the start time. A flashing segment indicates that a start time needs to be entered.

hour.min Start time Day.Mon day and month Year year

Set each entry with enter .

Start no / yes

A flashing line indicates that the parameter "yes" needs to be entered.

Press the P-key to select the parameter and press enter .

 The temperature system switches to waiting mode and a

flashing line "wait" appears on the DIALOG-DISPLAY (LCD). The start time and actual time are permanently indicated on the display.

Int

S 120.00 E 120.00

Indication after starting the profile:

DIALOG-DISPLAY (LCD) 1st line: Setpoint of the programmer 2nd line: Actual temperature value

at internal control = IntAct: xxx.xx

at external control = ExtAct: xxx.xx 3rd line: Selected profile and the actual section 4th line: Remaining time of the actual section

VFD-Info-Display:  Line 1 indicates the actual temperature value.

In the header the corresponding symbol >Int< or >Ext< is illuminated.

 Press the key to swap the values in line 1 and line 3.

Page 37

Presto

8.3.1. Interrupting a profile

Interrupting a profile:

 Press the start/stop key to interrupt or continue a

profile. The setpoint and time period set for the corresponding section are thus stopped at the values presently achieved. The instrument is put on hold and the message "pause" flashes on the DIALOG DISPLAY (LCD).

STAND-BY

 A profile can be interrupted or restarted by an external

emergency shut-off (see page 52).

CAUTION:

This is not an actual emergency switch-off.

 The setpoint control and the timer are interrupted by

breaking the contact "AK”.

The instrument is put on hold and the message "Stand-By" flashes on the DIALOG-DISPLAY (LCD).

Important: To achieve this, the stand-by condition must first be activated and the AUTOSTART function turned on (See page 32).

Warning:

Following a power interruption, it would be possible in this condition for the instrument to restart automatically. The safety and warning functions of the instrument should always be used to their fullest capacity.

See Warning page 32

Termination of a profile:

A profile can be terminated by pressing the escape key . The programmer switches back to the Start menu.

 Press the escape key again to leave the menu

or use the cursor keys to remain in the Start menu.

The execution of another temperature profile can now be prepared if necessary.

Page 38

Menu functions

8.4. Integrated programmer

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.

Control param.

Profile Start

Int.Programmer

Inputs/Outputs

Limits Interface Temp.Sensor

Int.Programmer >Edit

Delete Set Clock

 Press enter to select the submenu "Int. Programmer".  Use the up/down cursor keys to select the

desired option. Then press enter to open. A flashing segment indicates that a number or value needs to be entered. Edit Compile profiles

Display sections

Delete Delete sections Set clock Set the real time on the instrument

Int.Programmer

Edit Delete

>Set Clock

>hour.min 11:09

Day.mon 18.04

Year 1997

Examples:

Setting clock

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

 Lines 1 to 3:

Check for correctness of the preset date and time and correct if necessary.

The time is diplayed permanently in line 4.

 Use the numerals to set time, date and year and set each

entry with enter .

 Press escape to return to the previous menu level.

Page 39

Presto

Int.Programmer >Edit

Delete Set Clock

>Edit Profile: 1

Step: 6

Setp: 100.00°C

Time[h.m] 01:05

Examples: Profile No 1: Step Setpoint

Time

Edit

Compile profiles:  A flashing segment indicates that a number needs to be

entered. Under submenu "Edit Profile" enter a profile number. Six profiles may be stored (nos. 0 to 5).

 Then programme the desired values for each section.

Use the keypad to set section number, target temperature and time period. Set each entry with enter .

When the program is running, only sections having complete information for target temperature and time period are considered. It makes sense, to leave out section numbers in the profile, in order to use them later for corrections in the profile.

Important:

If a time of 00:00 is set for a profile, the profile is continued with the next section only after the setpoint temperature (±0.2 °C) is reached.

 Press escape to return to the previous menu level.

Example: Step (No.) 1 3 5 6 9 11 14 Setpoint (°C) 50 50 100 100 80 80 20 Time (h.m) 00:08 00.02 00:10 01:05 00:10 00:05 00:30

Step

Display sections:

1. Use the cursor keys to select the submenu "Step", enter the desired number and press enter .

2. If the submenu „Set“ is selected, section by section can be

shown in ascending order by the P-key .

3. Each previously set value is displayed.

Page 40

Menu functions

Delete

 A flashing segment indicates that the respective profile

number needs to be entered in which one or more consecutive sections are to be deleted.

 In lines 2 and 3 of the DIALOG DISPLAY (LCD) enter the

numbers of the sections to be deleted. Press enter .

 delete no / yes

Press the P-key to select the parameter "yes" and press enter .

Line 4 indicates the deletion. Example:

Delete section 8 to section 34 in profile 3.

 Press escape to return to the previous menu level.

Page 41

Presto

8.5. Analog inputs/outputs

This submenu enables setting of the input and output values for the programmer input and the temperature recorder outputs of socket REG+E-PROG (21).

 Press enter to select the inputs/outputs submenu.  Use the up/down cursor keys to select the

desired option and press enter to open.

Chan.1 voltage output for recorder (V) Chan.2 voltage output for recorder (V) Chan.3 current output for recorder (mA) EPROG external programmer input

 First define the desired output value for channels 1 to 3:

Press the P-key to select the desired output value and set with enter

Setpoint active setpoint temperature

(Keypad, integr. programmer/ext. programmer)

ActInt internal actual temperature value

(bath temperature)

ActExt external actual temperature value

(external sensor)

Power periodic or intermittent heating or cooling

 Then select the display size for channels 1 to 3:

Channel 1 and 2 voltage outputs

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

Current output channel 3

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

The current output offers 2 ranges for selection: 0 to 20 mA and 4 to 20 mA

Select the desired range by pressing the P-key and set with enter

The LCD display changes automatically.

Page 42

Menu functions

Examples:

lowest temperature value: 10 °C highest temperature value 210 °C Fig. shows 200 C scaled to paper width rise: 50 mV/°C

lowest temperature value: 197 °C highest temperature value: 202 °C Fig. shows 5 C scaled to paper width rise: 2000 mV/°C

REG+E-PROG

Configuration Identif. xxxxx Setpoint EPROG Autostart xxx

Inputs/Outputs

chan.2: ActInt

chan.3: ActExt

>EPROG: Current

L Value 0.0°C

H Value 300.0°C

ExtSet 50.0°C

EPROG - Input

This input is necessary when the nominal value is to be determined and set by an external programmer (see page 31 )

1. Connect the external programmer to socket (3.1) REG+E-PROG of the instrument.

2. Adjust the menu option >Setpoint< on >EPROG< in the menu >Konfiguration< (see page 31)

3. The programmer input of the instrument can be matched to the output signal of the external programmer.

Voltage voltage input Current current input

Select the desired input value with the P-key and set with enter

 "L Value" - Setting the LOW value::

Adjust and set the lowest desired working temperature on the programmer (e.g. 0 C). Enter this same temperature on the instrument by pressing the appropriate buttons on the keypad and press enter

to set.

 "H Value" - Setting the HIGH value:

Adjust and set the highest desired working temperature on the programmer (e.g. 300 C). Enter this same temperature on the instrument by pressing the appropriate buttons on the keypad and press enter

to set.

 Return to the standard display by pressing escape

Example:

 Setting a temperature of 50 C on the external programmer! The value adjusted and set on the external programmer is

displayed in line 4 of the DIALOG-DISPLAY (LCD) for control purposes (Example: ExtSet: 50.0 C). After returning the LCD display to standard display by pressing

escape ("Setpoint" - see page 31) this value is displayed in line 1 (Example: EPROG 50.00 C).

Page 43

Presto

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

 "L Value" - Setting the LOW value:

1) Adjust and set the lowest desired value on the voltage or current source resp. (Example A: 1 V).

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

 "H Value" - Setting the HIGH value:

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

2) 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 C) and set by pressing enter .

 Return to the standard display by pressing escape . Example B in the diagram serves to illustrate that the end

point values are freely selectable.

Example out of diagram A:

 Adjusting the voltage source for an output of 7.6 V! Line 4 of the DIALOG-DISPLAY (LCD) shows the externally

set setpoint value. 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 C ). After returning the LCD display to standard display by

pressing escape , this value is displayed in line 1 (Example: EPROG 152.00 C).

Notice:

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

Page 44

Menu functions

8.6. Limits

Int.Programmer Inputs/Outputs Limits Interface Temp.Sensor

Limits

>IntMax 400.00°C

IntMin -99.99°C

Band 30K

HeatingMax 100%

CoolingMax 100%

The limits IntMax and IntMin are only valid under external control (see 7.5. Internal / external control). They restrict the temperature of the internal bath to the desired maximum/minimum, also if the controller would require a higher/lower temperature for the external system. As a result the external setpoint may thus not be reached.

When operating the temperature system under external control, band limiting is active. The preset value determines the maximum temperature difference between the internal bath and the external load. This adjustment possibility prevents sensitive equipment and temperature devices from damage.

Heating and cooling power of the instrument are adjustable. 100 % corresponds to the values in the technical specifications of the equipment.

 Select the submenu "Limits" with enter .  Select the desired option with the up/down cursor keys

A flashing digit indicates that a value needs to be entered.

IntMax see temperature range LHxx IntMin see temperature range LHxx Band 0 to 200 °C HeatingMax 0 to 100 % in steps of 1 % CoolingMax 0 to 100 % in steps of 1 %

 Set the newly entered value by pressing enter .  Return to the previous menu level by pressing escape

8.7. Interface

The interface parameters are set by selecting the submenu "Interface" on the temperature system. Normally, this is a onetime-only adjustment.

 Press enter to select the submenu "Interface".  Select the desired option with the up/down cursor keys

Enter the desired value for the flashing digit.

Type RS232 / RS485 Baudrate 4800/9600 Parity none/even/odd Handshake software handshake/hardware

handshake Address 0 to 127

 Press the P-key to select the desired parameter and

set with enter

 Return to the previous menu level with escape

Page 45

Presto

8.8. Sensors

ATC - Absolute Temperature Calibration

 Select the submenu "Temp.Sensor" with enter .  Select the desired option with the up/down cursor keys

A flashing digit indicates that a value needs to be

entered i.e. set.

ATC Int: internal sensor ATC Ext: external sensor

 Enter the desired compensating value and set this value by

pressing enter .

Notice:

ATC Int: Do not alter the factory-setting!

ext. Pt100

Calibrated thermometer (TM)

Presto: Pt100 sensor (T

ExtIst

)

Setp.: xx.00°C

IntAct xx.00°C

ExtAct: 51.22°C

Control: Intern

ATC Ext:

serves calibration of an external Pt100 sensor.

 Immerse the external Pt100 sensor and a calibrated

thermometer together in a calibration bath at 50°C, for example, and allow the reading to stabilize.

 Read the temperatures of the calibrated thermometer (TM)

and the external Pt100 sensor (T

ExtIst

) in their respective

displays.

 Calculate the temperature difference and enter and set this

difference value as the ATC external compensating parameter. (Example: T = T

ExtIst

- T M= 1.22 K)

 Use the keypad to enter the desired compensating value

(e.g. 1.22 °C) and set with enter .

Important:

The ATC function remains active until reset to 00.00 °C.

Page 46

Menu functions

8.9. Pump

Pump

>Pump Off

Mode: drain

Limits Interface Temp.Sensor

>Pump

In this submenu the circulation pump can be turned on separately, without heating element or cooling unit.

The menu option „Modus“ refers to the filling valve and the ventilation valve. Depending on the operating status (drain / fill / sys open / sys close) the valves are switched off automatically.

 Press enter to select the submenu "Pump".  Select the desired option with the up/down cursor keys

Enter the desired value for the flashing digit.

Pump OFF/ON Mode: drain / fill / sys open / sys close

 Press the P-key to select the desired parameter and

set with enter

 Return to the previous menu level with escape



Explication of terms: >Mode: System closed<stands for closed, external system. (Presto® principle

page 9) In this operating status the filling valve is opened and the ventilation valve is closed.

>Mode: drain<. (Chapter „Draining“ see page 20)

In this operating status the filling valve and the ventilation valve are opened.

In the configuration of this unit the >Mode: fill< means the same as >Mode: drain<.

Page 47

Presto

9. Troubleshooting guide / Error messages

+ 

ALARM

CODE 14

Whenever the microprocessor electronics registers a failure, a complete shutdown of the temperature system is performed.

The VFD-Info-Display indicates the cause for the alarm in form of a code.

The alarm light " " illuminates and a continuous signal tone sounds.

CODE 02

 Defect temperature sensor in refrigeration circuit.

Repair by authorized JULABO service personnel.

CODE 05

 Cable of the working temperature sensor interrupted or short-

circuited.

CODE 06

 Defect of the working or safety temperature sensor.

Working temperature and safety sensors report a temperature difference of more than 25 °C.

CODE 07

 Other errors (I2C-BUS errors)

CODE 12

 Error in A/D converter.

CODE 13

 Sensor in the internal reservoir >RES< is defect  The safety temperature value lies below the working temperature

setpoint. Set the safety temperature to a higher value.

CODE 14

 Safety sensor defect >TANK<  The safety temperature value lies below the working temperature

setpoint. Set the safety temperature to a higher value.

 The temperature system is operated without bath liquid, or the

liquid level is insufficient. Replenish the bath tank with the bath liquid.

 Tube breakage has occured (insufficient filling level due to

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

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

authorized JULABO service personnel.

CODE 15

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

CODE 16

 Heating circuit interrupted.

CODE 17

 Heating circuit short-circuited.

CODE 31

 Communication between control module RD and instrument

interrupted.

Page 48

Troubleshooting guide / Error messages

Warning

CODE 40

Warnings without a complete shutdown of the unit

CODE 03

 Excess temperature warning

CODE 04

 Low temperature warning

CODE 20

 Cooling of the condenser is affected. Clean air-cooled condenser.

Check the flow rate and cooling water temperature on water-cooled condenser.

CODE 21

 Compressor stage 1 does not work.

Check mains circuit breakers F1 and F3, both might have triggered. Reset circuit breakers if necessary (see below).

CODE 40

 Low liquid level warning in the internal reservoir



 These messages appear every 10 seconds as long as the

compressor is not switched on although requested by the instrument.

 After a short cooling interval, the motor will be automatically

reconnected and the message " CODE XX " no longer appears.



 Press enter to quit the audible signal.

 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.

Disturbances that are not indicated. Pump motor overload protection

 The pump motor is protected against overloading. After a short

cooling interval, the motor will automatically start running.

A M P

F4F2

Fuses:  Mains circuit breakers (resettable).

Page 49

Presto

10. Safety recommendations

Follow the safety recommendations to prevent damage to persons or property. Further, the valid safety instructions for working places must be followed.

See also chapter 16.Responsibility of the operator

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

earth)!

 Place the instrument on an even surface on a pad made of non-inflammable

material.

 Set the value for safety temperature.  Pay attention to the thermal expansion of bath oil during heating to avoid

overflowing of the liquid.

 Prevent water from penetrating into the hot bath oil.  Exercise caution when emptying hot bath liquids!  Employ suitable connecting tubing.  Make sure that the tubes are 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)..  Before cleaning the unit, disconnect the power plug from the mains socket.

Notice:

When you have finished the application, it is recommended to keep on circulating the liquid in the bath or the external system for some time. Simultaneously set the working temperature to +20 °C to allow the temperature in the system to decrease slowly. Thus fractional over-heating of the bath liquid is prevented.



Inportant:

Please check the safety device from time to time.

 Excess temperature protection according to DIN 12876-1-2000

With a screw driver turn back the adjustable excess temperature protection until the shut-down point (actual temperature).

 Low level protection

To check the function of the float of this unit it cannot be operated manually. The 5-graded level display should therefore be observed whenver refilling. If the bath liquid thickens or cracks, the instrument should be cleaned and checked by qualified personnel.

Page 50

Electrical connections

11. Electrical connections

SERIAL

RS232/RS485 serial interface (3.5)

This port can be used to connect a computer with an RS232 or RS485 cable for remote control of the temperature system.

Pin assignments: RS232

Pin 2 RxD Receive Data Pin 3 TxD Transmit Data Pin 5 0 VD Signal GND Pin 6 DTR Data terminal ready Pin 7 RTS Request to send Pin 8 CTS Clear to send

Pin assignments: RS485

Pin 3 A Pin 5 0 VD Signal GND Pin 8 B

Pin 1; 2; 6; 7; 9 Reserved - do not use!

Interface correspondence:

Instrument Computer  Instrument Computer



9-pole 25-pole  9-pole 9-pole Pin 2 RxD  Pin 2 TxD  Pin 2 RxD  Pin 3 TxD Pin 3 TxD  Pin 3 RxD  Pin 3 TxD  Pin 2 RxD Pin 5 GND  Pin 7 GND  Pin 5 GND  Pin 5 GND Pin 6 DTR  Pin 6 DSR  Pin 7 RTS  Pin 5 CTS  Pin 7 RTS  Pin 8 CTS Pin 8 CTS  Pin 4 RTS  Pin 8 CTS  Pin 7 RTS

RS232 interface cable 9-pin / 9-pin, 2.5 m - Order No.: 8 980 073



Important:

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

Page 51

Presto

REG+E-PROG

Programmer input / temperature recorder output (3.1)

Analog inputs / outputs see page 41 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

ALARM

Alarm output (3.3)

(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

ext. Pt100

Shield

Plug

Look on

soldering side.

Pt100

Socket for external Pt100 sensor (3.4)

Pin assignment:

Pin Signal

1 I+ 2 U+ 3 U4 I-

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



Important:

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

Page 52

Electrical connections

STAND-BY

STAND-BY input (3.2)

(for external emergency switch-off) Pin assignment: Pin Signal

1 not connected 2 5 V / DC 3 0 V

Use shielded cables only.

Activate the stand-by input:  Under menu item Stand-by, set the parameter to "yes"

(see page 32).

 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 circulation pump and heater is effected, and the unit enters the condition "OFF". As long as the contact remains open, line 4 of the DIALOGDISPLAY (LCD) flashes and displays the message "STAND-BY".

If the contact is reclosed, the instrument returns to the stand-by state and "OFF" is displayed.

Additional tips for using the STAND-BY input:

The stand-by function can be used in conjunction with the AUTOSTART feature (see page 32)

1. If the Autostart function is NOT turned ON, the stand-by input should be used as described above.

2. If the Autostart funcion 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 shut-down is accompanied by the "STAND-BY" display and the OFF state. The programmable controller starts again when the contact is reclosed. The temperature of the bath liquid changed during the STAND-BY state.

 Entering the setpoint with the programmer (see pages 35 and

37). The display "STAND-BY" appears. The setpoint value and the time are both held at the current value. The temperature of the bath liquid will be held constant at this temperature. The programmer continues once the contact is reclosed.

Warning: this is not an actual shutoff feature.

Page 53

Presto

Connector for removable control module RD (3.6) Extension cable for operating device RD:

Order No. 8 980 126 2 m long Order No. 8 980 127 5 m long

Control connector (10)

Output voltage is applied when the unit runs, for example after pressing the start/stop key .

Output voltage: 230 V / max. 0.1 A

12. Remote control

12.1. Setup for remote control

RS232 RS485

Select the "Configuration" submenu and select the option "Setpoint" to define the interface (see page 31).

The interface parameters are set by selecting the submenu "Interface" on the instrument. Normally, this is a one-time-only adjustment. (Selecting and setting menu items, see page 44.)

Factory settings:

RS232 BAUDRATE 4800 bauds

PARITY even parity

HANDSHAKE Protocol RTS/CTS

(hardware handshake) Data bits 7 Stop bit 1



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

12.2. Communication with a PC or a superordinated data system

Suitable terminal programs for communicating with a PC are:

 MS-Windows - TERMINAL.EXE (included with MS-Windows).  MS-DOS - Procomm Plus, Datastrom Technologies.  MS-DOS - Norton Utilities.

Page 54

Remote control

S xx. xx

ID 0

If the temperature system is put into remote control mode via the configuration level, the display will read "R -OFF-" = REMOTE STOP.

In general, the computer (master) sends commands to the instrument (slave). The instrument sends data (including error messages) only when the computer sends a query.

D A transfer sequence consists of:

 address (RS485 interface only)  command  space (; Hex: 20)  parameter (the character separating decimals in a group is the

period)

 end of file (; Hex: 0D)

The commands are divided into in or out commands.

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



The out commands are valid only in remote control mode.

When the RS485 interface is used, the three-digit instrument address stands in front of each command. (example: address Ad32 = A032)

Examples:

Command to set the working temperature to 55.5 °C

out_sp_00 55.5

A032_out_sp_00 55.5

Command to ask for the working temperature T1:

in_sp_00

A032_in_sp_00

Response from the instrument:

55.5

A032_55.5

Page 55

Presto

12.3. List of commands

When the RS485 interface is used, the instrument address stands in front of each command (Axxx_).

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

Command

Parameter Response of instrument

version

none Number of software version (V X.xx)

status

none Status message, error message (see page 58)

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. >TANK<

in_pv_05

none Pump pressure in bar.

in_sp_00

none Working temperature

in_sp_03

none

High temperature warning limit

in_sp_04

none

Low temperature warning limit .

in_sp_05

none Setpoint temperature of the external programmer

(socket 3.1 - REG+E-PROG) .

in_sp_07

none Pump pressure stage

in_hil_00

none Max. cooling power (%).

in_hil_01

none Max. heating power (%).

in_mode_02

none Identification type:

0 = no identification 1 = single identification 2 = continual identification

in_mode_03

none Type of the 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.

Page 56

Remote control

Command

Parameter Response of instrument

in_mode_05

none Temperature system in Stop/Start condition:

0 = Stop 1 = Start

in_mode_08

none Adjusted control dynamics

0 = aperiodic 1 = standard

in_par_01

none Time constant of the external bath.

in_par_02

none Internal slope.

in_par_03

none Time constant of the internal bath.

in_par_04

none Band limiting (max. difference between the temperatures in

the internal bath and external system).

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.

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.

Page 57

Presto

out commands: Setting parameters or temperature values.

Command

Parameter Response of instrument

out_mode_01

0 Use working temperature

out_mode_02

0 No identification.

Temperature control by using the stored parameters.

out_mode_02

1 Single identification of controlled system after the next start.

out_mode_02

2 Continual identification of controlled system whenever a new

setpoint is to be reached.

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-.

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.x Set working temperature.

out_sp_03

xxx.x

Set high temperature warning limit .

out_sp_04

xxx.x

Set low temperature warning limit .

out_sp_07

x Set the pump pressure stage (1 ... 5).

out_hil_00

-xxx Set the desired maximum cooling power (0 % to 100 %).

Note: Enter the value with a preceding negative sign!

out_hil_01

xxx Set the desired maximum heating power (10 % to 100 %).

out_par_04

xxx Band limiting 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.

out_par_07

xxx Tn control parameter of the internal controller.

out_par_08

xxx Tv control parameter of the internal controller.

out_par_09

xxx Xp control parameter of the cascade controller.

out_par_10

xxx Proportional portion of the cascade controller.

Page 58

Remote control

Command

Parameter Response of instrument

out_par_11

xxx Tn control parameter of the cascade controller.

out_par_12

xxx Tv control parameter of the cascade controller.

out _par_13

xxx Maximum internal temperature of the cascade controller.

out _par_14

xxx Minimum internal temperature of the cascade controller.

12.4. Status messages / error messages

The instrument sends data (including error messages) only when the computer sends a query.

Status messages Description

00 MANUAL STOP Presto®in "OFF" state. 01 MANUAL START

01 MANUAL START,DEGASING

Presto®in keypad control mode

Presto®in keypad control mode and degasifying active

02 REMOTE STOP Presto®in "r OFF" state. 03 REMOTE START

03 REMOTE START,DEGASING

Presto®in remote control mode.

Presto®in remote control mode and degasifying active

Page 59

Presto

Error messages Description

-02 REFRIGERATOR ALARM

Defect temperature sensor in refrigeration circuit.

-03 EXCESS TEMPERATURE WARNING

High temperature warning " ".

-04 LOW TEMPERATURE WARNING

Low temperature warning " ".

-05 WORKING SENSOR ALARM

Working temperature sensor short-circuited or interrupted.

-06 SENSOR DIFFERENCE ALARM

Sensor difference alarm. Working temperature and safety sensors report a temperature difference of more than 25 °C.

-07 I2C-BUS ERROR

Internal error when reading or writing the I2C bus.

-08 INVALID COMMAND

Invalid command.

-09 COMMAND NOT ALLOWED IN CURRENT OPERATING MODE

Invalid command in current operating mode.

-10 VALUE TOO SMALL

Entered value too small.

-11 VALUE TOO LARGE

Entered value too large.

-12 TEMPERATURE MEASUREMENT ALARM

Error in A/D converter.

-13 WARNING : VALUE EXCEEDS TEMPERATURE LIMITS

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

-14 TEMPERATURE/LEVEL ALARM

Safety temperature alarm

-15 EXTERNAL SENSOR ALARM

External control selected, but external Pt100 sensor not connected.

-16 TRIAC/RELAY CONNECTION OPEN

Heating circuit interrupted.

-17 TRIAC SHORTED

Heating circuit short-circuited.

-20 WARNING: CLEAN CONDENSOR OR CHECK COOLING WATER CIRCUIT OF REFRIGERATOR

Cooling of the condenser is affected. Clean air-cooled condenser. Check the flow rate and cooling water temperature on water-cooled condenser.

-21 WARNING: COMPRESSOR STAGE 1 DOES NOT WORK

Compressor stage 1 does not work. Check mains circuit breakers F1 and F3, both might have triggered. Reset circuit breakers if necessary.

-26 WARNING: STAND-BY PLUG IS MISSING

External stand-by contact is open. Stand-by input - see pages 32 and 52.

-31 INTERNAL COMMUNICATION ERROR

Communication between remote module RD and instrument interrupted.

-40 NIVEAU LEVEL WARNING

Low liquid level warning in the internal reservoir.

Page 60

Maintaining the cooling performance

13. Maintaining the cooling performance

Air-cooling:

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

 Switch off the unit, disconnect mains power cable.  Hold the venting grid, pull out and remove.  Clean the ribbed condenser with a vacuum cleaner.  Replace the venting grid.  Switch on the unit.

14. Disposal of the unit

Notice:

The unit contains R404A or R23 refrigerant which is not harmful to ozone as it looks today. However, during the long time of use the regulations for disposal might change. Subsequently, only specialists should take care of disposal.

Valid in EU countries Directive 2002/96/EC of the European Parliament and of the Council of 27 January 2003 on waste electrical and electronic equipment (WEEE). This directive requires electrical and electronic equipment marked with a crossed-out 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!

Page 61

Presto

15. Cleaning the unit

Caution:

Before cleaning the unit, disconnect the power plug from the mains socket! Prevent humidity from entering into the unit.

Cleaning the unit outside

 Clean the outside of the unit using a wet cloth and low surface tension

water (e.g., soap suds).

Before applying a cleaning or decontamination method different from the one recommended by JULABO, the user has to make sure with the manufacturer, that the planned method does not damage the unit.

Cleaning the inside:

If you change the bath liquid or want to use a different one, carefully clean the parts in contact with the bath liquid. The heat exchanger, internal reservoir, connecting tubing and external system should be rinsed several times using cleaning liquid.

S 20.0 0

ID 0

Caution:

 Choose the detergent according to the bath liquid which is used.

E.g. Ethanol, Silicon remover, paint remover can be used.

 Take care the room where cleaning takes place is well ventilated.  Set the working temperature setpoint.

Recommendation: 20 °C

A M P

16 A M P

OUT

16.1

16.2

Preparations:

1. Drain the temperature system. See chapter 5.8. Draining

2. If only the Presto®temperature system is to be cleaned, connect the pump connectors (13, 14) using a tubing.

3. Connect a tubing to the connector (16) "Reservoir extern". First hold the end of the tubing towards position 16.1, to prevent the cleaning liquid from flowing down instantly.

4. Hold the tubing from the overflow connector (15) into a suitable vessel.

Page 62

Cleaning the unit

Cleaning is performed in three steps. First rinse the internal reservoir, then the remaining parts of the instrument. As third step, carefully remove the cleaning liquid.

1. Cleaning the internal reservoir:

 Switch off the unit with the mains switch!

Thus both valves "Fill" and "De-air" remain closed.

 Slowly fill the temperature system via the funnel (5) on the front.

The cleaning liquid should drain via the overflow connector (15). Thus the internal reservoir is rinsed. Empty the internal reservoir by holding the end of the tubing from connector (16) towards position 16.2. Additionally the unit can be lifted up by 4-5 cm by using the handle (6) Repeat this procedure according to the degree of decontamination.

Pump

>Pump OFF

Mode: Sys close

Pump

>Pump OFF

Mode: drain

2. Cleaning the tubing lines and heat exchanger:

 Fill the temperature system with cleaning liquid.

See chapter 5.6. Filling

 In the submenu >Pump< the unit has to be adjusted on the

operating status >Sys close< .

 Set the working temperature setpoint.

Recommendation: 20 °C

 Press the start key and allow the liquid to be pumped

through the unit for about 15 minutes.

 Press the stop key .

Drain the temperature system. In the submenu >Pump< adjust the menu option >Mode< on >drain< stellen. See chapter 5.8.Draining

3. Removing the cleaning liquid:

 Switch on the unit with the mains switch!

Both valves "Fill" and "De-air" remain open.

 Blow through the temperature system with dry, warm air.

The air is fed in turns through the different connectors on the temperature system. Begin with the connectors (15, 16) leading to the internal reservoir. Then blow through the pump connectors (13, 14) leading to the heat exchanger and the drain port (8) on the front.

 Allow the system to dry (wait until the humidity evaporates).

Then reconnect the temperature system or close the connectors according the intended use. Tighten the drain screw on the front.

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16. Responsibility of the operator

Caution:

Take care your unit is operated only by qualified persons.

The temperature systems have been designed for temperature application to liquids in a reactor, for example. 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

You alone are 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.

17. Maintenance

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

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:  Empty completely, remove the expansion tank, close tightly the connections

with nuts and closing caps.

 Careful and appropriate packing is important.  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.

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Technical specifications

18. Technical specifications

Working temperature range °C -40 ... 250 Temperature stability °C ±0.01 ... ±0.05 Cooling capacity

°C 200 / 20 -20 -40 (bath liquid: Thermal / Ethanol) kW 1.5 / 1.0 0.4 0.05 Cooling compressor 1-stage Refrigerant R404A Heater wattage Watts 1800 Pressure pump, adjustable in five grades pressure min ... max. at 0 liter bar 0.8 ... 1.6 discharge, max. at 0 bar l/min 24 ... 33 Noise level, 1 m distance dBA 66 Ambient temperature °C 5 ... 40 Mains power connection ±10 % V / Hz 230/50 / 230/60 Total power consumption W 2400 Filling volume Liters 2,5 Overall dimensions (WxDxH) cm 30 x 49 x 64 Weight kg 71

Cooling capacity measured at pumpe stage 1=24 l/min. – 0,8 bar

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

Temperature selection digital

via Removable control module RD indication on DIALOG-Display (LCD) remote control via personal computer indication on monitor

Temperature indication VFD-Info-Display

DIALOG-DISPLAY (LCD) Resolution K 0.01 from -9.99 °C to +249.99 °C Pump pressure display on VFD-Info-Display in five grades Liquid level display on VFD-Info-Display in five grades

Absolute Temperature Calibration

(ATC1) K ±3 (ATC2) K ±9

Temperature control ICC - Intelligent Cascade Control, self-optimizing

Cascade, parameter can be called-in and modified Working temperature sensor Pt 100 Safety temperature sensor Pt 100 Electrical connections: Computer interface RS232 or RS485 or Profi Programmer input -100 °C to 400 °C = 0 to 10 V or 0 to 20 mA or 4 to 20 mA Temperatur recorder outputs 0 to 10 V (0 V = -100 °C, 10 V = 400 °C)

0 to 20 mA (0 mA = -100 °C, 20 mA = 400 °C)

4 to 20 mA (4 mA = -100 °C, 20 mA = 400 °C) Stand-by input External alarm device 24-0 V DC / max. 25 mA External measurement and control sensor Pt100, 4-lead technique Control connector (10) Output voltage: 230 V / max. 0.1 A

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Safety installations according to IEC 61010-2-010: Excess temperature protection >TANK< adjustable from 0 °C ... 320 °C Excess temperature protection >RES< adjustable from 0 °C ... 220 °C Low level protection float switch

Liquid level display optical, 5-graded Classification according to DIN 12876-1 class III FL Supplementary safety installations High temperature warning function optical + audible (in intervals)

Low temperature warning function optical + audible (in intervals) Supervision of the working sensor plausibility control Reciprocal sensor monitoring between

working and safety sensors difference >25 °C Alarm indication optical + audible (permanent)

Standards:

EMC regulations EN 61326 Guideline for first voltage range EN 61010-1, EN 61010-2-010 Pressure equipment directive EN 378

Protection class IP31 acc. IEC 529 Environment:

Use only indoor. Altitude up to 2000 m - normal zero. Ambient temperature: +5 ... +40 °C (for storage and transportation)

Air humidity acc. DIN EN 61 010, part 1:

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

Power supply: acc. to class 1, VDE 0106 T1

not for use in explosive atmosphere

Max. mains fluctuation of ±10 % are permissible. Overvoltage category II Pollution degree 2

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EC Declaration of Conformity

19. EC Declaration of Conformity

The following unit complies with the essential safety requirements outlined by the EC Directives concerning the guidelines for electromagnetic compatibility (89/336/EEC), low voltage regulations (73/23/EEC) and the pressure equipment directive (97/23/EEC).

High Dynamic Temperature System: LH40

This unit is manufactured in compliance with the following guidelines

electrical equipment for control technology and laboratory application – EMC requirements outlined by

EN 61326

safety regulation for electrical devices for measuring, control and laboratory application specified by

EN 61010

refrigerated and heating circulators – safety and environmental – conscious requirements outlined by

EN 378

Julabo Labortechnik GmbH Eisenbahnstr. 45 D-77960 Seelbach / Germany

G. Juchheim, Managing Director

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20. Warranty conditions

JULABO Labortechnik 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 Labortechnik GmbH’s original invoice.

JULABO Labortechnik 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.

Julabo LH 40, Presto LH 40 Operating Manual

Specifications and Main Features

Frequently Asked Questions

User Manual