JULABO LH 50 User Manual

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Operating Manual

Highly Dynamic Temperature Control Systems

 with integrated programmer

LH 47 air cooled

LH 50 water cooled

Version: V45D-01

1.951.2790-V2 06/13

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

19512790-V2.doc Print date: 29.07.13

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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 operation and possible applications of our circulators. For optimal utilization of all functions, we recommend that you thoroughly study this manual prior to beginning operation.

Printed in Germany Changes without prior notification reserved

Important: keep operating manual for future use

The JULABO Quality Management System

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

Unpacking and inspecting

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

Lift the unit only with a crane (see pictures) using the lifting strands and the wooden crate . The recessed grips on the side are not suited for this purpose!

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TABLE OF CONTENTS

OPERATING MANUAL ....................................................................................................... 5

1. INTENDED USE .................................................................................................... 5

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

2. OPERATOR RESPONSIBILITY – SAFETY INSTRUCTIONS .............................. 6

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

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

2.3. Warranty conditions ............................................................................................... 9

2.4. Technical specifications ....................................................................................... 10

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

OPERATING INSTRUCTIONS ......................................................................................... 15

3. SAFETY NOTES FOR THE USER ...................................................................... 15

3.1. Explanation of safety notes ................................................................................. 15

3.2. Explanation of other notes ................................................................................... 15

3.3. Safety instructions ............................................................................................... 15

4. OPERATING CONTROLS AND FUNCTIONAL ELEMENTS .............................. 18

4.1. The Presto Plus

principle with closed external system ........................................ 24

5. PREPARATIONS ................................................................................................ 25

5.1. Bath fluids ............................................................................................................ 25

5.2. Tubing .................................................................................................................. 27

5.3. Installation ........................................................................................................... 28

5.4. Connect the external system ............................................................................... 28

5.5. Cooling water connection LH 50 .......................................................................... 30

5.6. Power connection ................................................................................................ 31

5.7. Filling ................................................................................................................... 31

5.7.1. Filling of external, closed systems ................................................................ 32

5.8. Degasifying .......................................................................................................... 34

5.9. Draining ............................................................................................................... 35

6. OPERATING PROCEDURES ............................................................................. 36

6.1. Switching on / Selecting the language ................................................................. 36

7. MANUAL OPERATION ........................................................................................ 37

7.1. Start - Stop .......................................................................................................... 37

7.2. Direct setting of the working temperature ............................................................ 38

7.3. Settings in the SET menu .................................................................................... 38

7.3.1. Setting the working temperature ................................................................... 38

7.3.2. Warning functions ......................................................................................... 39

7.3.3. Setting the pump pressure stage .................................................................. 40

7.4. Setting the safety temperature (with shutdown function) ..................................... 40

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7.5. Internal / external control ..................................................................................... 42

8. MENU FUNCTIONS ............................................................................................ 42

8.1. Configuration ....................................................................................................... 44

8.2. Control parameters .............................................................................................. 47

8.3. Start of a profile ................................................................................................... 49

8.3.1. Interrupting a profile ...................................................................................... 51

8.4. Integrated programmer ........................................................................................ 52

8.5. Analog inputs/outputs .......................................................................................... 55

8.6. Limits ................................................................................................................... 58

8.7. Interface............................................................................................................... 58

8.8. Sensors ............................................................................................................... 59

8.9. Pump ................................................................................................................... 60

9. TROUBLESHOOTING GUIDE / ERROR MESSAGES ....................................... 61

10. ELECTRICAL CONNECTIONS ........................................................................... 63

11. REMOTE CONTROL ........................................................................................... 66

11.1. Setup for remote control ...................................................................................... 66

11.2. Communication with a PC or a superordinated data system ............................... 67

11.3. List of commands ................................................................................................ 68

11.4. Status messages / error messages ..................................................................... 71

12. CLEANING THE UNIT ......................................................................................... 72

13. MAINTAINING / REPAIRING THE UNIT ............................................................. 75

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Operating manual

1. Intended use

JULABO Temperature Systems have been designed for temperature application to specific fluids in a external closed system (oop circuit). The units feature pump connections for temperature control of external systems (loop circuit).

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

1.1. Description

 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.

 LH47: The cooling unit may be cooled with air.

LH50: The cooling unit may be cooled with water.

 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), 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.

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Operator responsibility – Safety instructions

2. Operator responsibility – Safety instructions

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

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

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

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

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

understand the safety information and operating instructions.

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

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

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

Contact:

Safety instructions for the operator:

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

and contamination.

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

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

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

instruments being operated on the same mains.

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

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

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

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

 Permissible ambient temperature: max. 40 °C, min. 5 °C.  Permissible relative humidity: 50 % (40 °C).

JULABO GmbH Eisenbahnstraße 45 77960 Seelbach / Germany

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

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

Appropriate operation

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

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Use

The bath can be filled with flammable materials. Fire hazard! There might be chemical dangers depending on the bath medium used. Observe all warnings for the used materials (bath fluids) and the respective instructions (safety data sheets). Insufficient ventilation may result in the formation of explosive mixtures. Only use the unit in well ventilated areas. Only use recommended materials (bath fluids). Do not use poisonous, vitriolic or corrosive bath fluids..

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

or 2

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

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

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

Semi S1-0701 Table A1-2 #9 Carefully read the user information prior to beginning operation. Scope: USA, NAFTA

Warning label W26: Colors: yellow, black Hot surface warning.

(The label is put on by JULABO)

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

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Operator responsibility – Safety instructions

2.1. Disposal

The product may be used with oil as bath fluid. These oils fully or partially consist of mineral oil or synthetic oil. For disposal, follow the instructions in the material safety data sheets.

This unit contains the refrigerants R-404A and R-23, which at this time are not considered harmful to the ozone layer. However, over the long operating period of the unit, disposal rules may change. Therefore, only qualified personnel should handle the disposal.

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

2.2. EC Conformity

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

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

Member States relating to machinery.

Low voltage regulations with respect to legal harmonization of the member countries concerning

electric devices for use within certain voltage limits.

EMC guideline with respect to legal harmonization of the member countries concerning

electromagnetic compatibility.

JULABO GmbH Eisenbahnstr. 45 77960 Seelbach / Germany

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2.3. Warranty conditions

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

for a period of ONE YEAR.

Extension of the warranty period – free of charge

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

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

www.julabo.de

GmbH’s original invoice.

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

Any other compensation claims are excluded from this guarantee.

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

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Operator responsibility – Safety instructions

2.4. Technical specifications

Mains power connection 400 V/3P/50 Hz

LH 47 LH 50

V /

360-440 V/3PNPE/50 Hz 360-440 V/3PNPE/50 Hz

Current input (at 230 V) A 12 20

Working temperature range °C -47 ... 250 -50 ... 250 Temperature stability K ±0.01 ... ±0.05 ±0.01 ... ±0.05 Cooling capacity

pump pressure stage 1 pump pressure stage 5 (bath liquid: Thermal / Ethanol) Cooling compressor 1-stage

°C kW kW

200 100// 20 0 -20 -40

3.7 3.1 // 3.07 2.0 0.99 0.27

3.5 3.0 // 2.9 1.9 0.90 0.07

air-cooled

200 // 20 0 -20 -40

5.5 // 7.3 4.6 2.3 0.45

5.5 // 7.2 5.1 2.3 0.19

1-stage water-cooled

Refrigerant R404A R404A Cooling water : Flow rate

l/h ----- 390

at 20 °C inlet temperature Heater capacity kW

1.8 6.0

Pressure pump, adjustable pressure min ... max. at 0 liter discharge, max. at 0 bar

grade bar l/min

0.5

0.7

1.1

1.3

1.7

0.7 17

0.9 19

1.4 24

Viscosity, max. 50 mm²/s (50 cSt) Noise level, 1 m distance dBA 72 ----Ambient temperature °C 5 ... 40 5 ... 40 Filling volume Heat exchanger

Reservoir

liters liters

2.5

3.2 … 8.4

Overall dimensions (WxDxH) cm 40x55x127 40x55x127 Weight kg 150 182

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

Pump data in relation to fluids with a specific density of 1 kg/dm3

1.8 27

2.3 31

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Mains power connection

LH 47 LH 50

V / Hz 207-253 V/3PPE/60 Hz 207-253 V/3PPE/60 Hz

230 V/3P/60 Hz

Current input (at 230 V) A 13 27

Working temperature range °C -47 ... 250 -50 ... 250 Temperature stability K ±0.01 ... ±0.05 ±0.01 ... ±0.05 Cooling capacity

pump pressure stage 1 pump pressure stage 5 (bath liquid: Thermal / Ethanol) Cooling compressor 1-stage

°C kW kW

200 100// 20 0 -20 -40

3.8 3.3 // 3.2 2.1 1.1 0.32

3.7 3.2 // 3.1 2.0 1.0 0.12

air-cooled

200 // 20 0 -20 -40

5.5 // 7.3 4.9 2.6 0.5

5.5 // 7.2 4.6 2.1 0.4

1-stage water-cooled

Refrigerant R404A R404A Cooling water : Flow rate

l/h ----- 330

at 20 °C inlet temperature Heater capacity kW

1.8 6.0

Pressure pump, adjustable pressure min ... max. at 0 liter discharge, max. at 0 bar

grade bar l/min

0.5

0.7

1.1

1.3

1.7

0.7 17

0.9 19

1.4 24

Viscosity, max. 50 mm²/s (50 cSt) Noise level, 1 m distance dBA 72 ----Ambient temperature °C 5 ... 40 5 ... 40 Filling volume Heat exchanger

Reservoir

liters liters

2.5

3.2 … 8.4

Overall dimensions (WxDxH) cm 40x55x127 40x55x127 Weight kg 150 182

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

Pump data in relation to fluids with a specific density of 1 kg/dm3

1.8 27

2.3 31

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Operator responsibility – Safety instructions

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 Programmer input -100 °C to 400 °C = 0 to 10 V or 0 to 20 mA or 4 to 20 mA Temperature 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

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 >50 K Alarm indication optical + audible (permanent)

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Environmental conditions according to IEC 61 010-1:

 Use only indoor.  Altitude up to 2000 m - normal zero.  Ambient temperature: see Technical specifications  Air humidity:

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

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

Caution:

The unit is not suitable for use in explosive atmosphere

Protection class according to IEC 60 529: IP31 The unit corresponds to Class I

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

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Operator responsibility – Safety instructions

2.5. Cooling water connection

Cooling water pressure (IN / OUT ) max. 6 bar Difference pressure (IN - OUT ) 3.5 to 6 bar Cooling water temperature <20 °C

Notice: Cooling water circuit

Risk of oil leaking from the refrigeration system (compressor) of the recirculating cooler into the cooling water in case of a fault in the cooling water circuit! Observe the laws and regulations of the water distribution company valid in the location where the unit is operated.

Notice:

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

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

scale in the heat exchanger.

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

even in heat exchangers made of stainless steel.

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

stainless steel.

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

unsuitable and will cause corrosion of the bath.

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

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

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

Recommended quality of cooling water:

pH Sulfate [SO4 2- ] Hydrocarbonate [HCO 3-]/sulfate [SO4 2-] Hardness [Ca 2+, Mg 2+]/[HCO 3-] Alkalinity Conductivity Chloride (Cl -) Phosphate (PO4 3-) Ammonia (NH3) Free chlorine Trivalent iron ions (Fe 3+) Manganese ions (Mn 2+) Carbon dioxide (CO2) Hydrogen sulfide (H2S) Content of oxygen Algae growth

Suspended solids impermissible

7.5 to 9.0 < 100 ppm > 1 ppm



> 0.5 60 ppm < [HCO 3-] < 300 ppm < 500 μS/cm < 50 ppm < 2 ppm < 0.5 ppm < 0.5 ppm < 0.5 ppm < 0.05 ppm < 10 ppm < 50 ppm < 0.1 ppm impermissible

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Operating instructions

3. Safety notes for the user

3.1. Explanation of safety notes

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

Warning:

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

Caution:

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

Notice:

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

3.2. Explanation of other notes

Note!

Draws attention to something special.

Important!

Indicates usage tips and other useful information.

3.3. Safety instructions

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

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

earth)!

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

must be always freely accessible.

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

material.

 Do not stay in the area below the unit.  Make sure you read and understand all instructions and safety precautions listed

in this manual before installing or operating your unit.

 Set the safety temperature.  Never operate the unit without bath fluid in the bath.

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Safety notes for the user

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

overflowing of the fluid.

 Prevent water from penetrating into the hot bath oil.  Do not drain the bath fluid while it is hot!

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

 Employ suitable connecting tubing.  Avoid sharp bends in the tubing, and maintain a sufficient distance from

surrounding walls.

 Make sure that the tubing is securely attached.  Regularly check the tubing for material defects (e.g. for cracks).  Never operate damaged or leaking equipment.  Always turn off the unit and disconnect the mains cable from the power source

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

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

before cleaning the unit.

 Always empty the bath before moving the unit.  Transport the unit with care.  Sudden jolts or drops may cause damages in the interior of the unit.  Observe all warning labels.  Never remove warning labels.  Never operate equipment with damaged mains power cables.  Repairs are to be carried out only by qualified service personnel.

Some parts of the bath cover and the pump connections may become extremely warm during continuous operation. Therefore, exercise particular caution when touching these parts.

Caution:

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

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

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

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

Page 17

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.

Caution: Escape of vapors / gas

The necessity of degassing requires that a closed system is not entirely sealed. Especially at increased working temperatures vapor / gas may escape.

Ensure sufficient ventilation at the place of installation!

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.

Notice:



Please check the safety device from time to time.

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

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 whenever refilling. If the bath liquid thickens or cracks, the instrument should be cleaned and checked by qualified personnel.

Page 18

Operating controls and functional elements

4. Operating controls and functional elements

Front view LH47 LH50

air-cooled water-cooled

Page 19

1 Mains power switch, illuminated 2 Local operating board 3 Socket board - description see page 20 4 Removable control module RD 5 Filling funnel (hinged)

7 Venting grid, removable 8 Drain with drain port

2 Local operating board

2.1

Motor protection circuit breaker for compressor motor

2 Mains circuit breakers (resettable) 10 A for the pump-motor 4 Mains circuit breakers (resettable) 16 A

VFD-Info-Display

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

To swap, press the key Line 2: Working temp. setpoint, constantly S xxx.xx

or indication of the safety temperature (TANK)

(see below)

2.2

Line 3: Miscellaneous values To swap, press the key

or indication of the safety temperature (RES)

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.

(see below)

Page 20

Operating controls and functional elements

2.3

2.4

2.5

2.6

2.7

Int

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

Key to swap line 1 on the VFD Actual value Int or Ext alternating with line 3

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 Adjustable excess temperature protection (safety temperature)

Used for setting the safety temperature in the internal bath, called "TANK" on the display

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

2.8

3 Socket board

3.1

3.2

3.3

3.4

3.5

REG+E-PROG

STAND-BY

ALARM

EXT. Pt100

SERIAL

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

Programmer input and temperature recorder output

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

Alarm output (for external alarm signal)

Connector for external measurement and control sensor

Interface RS232/RS485

3.6

Connector: control cable of control module RD

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4.0

Control module RD

Setp: 120. 00 °C IntAct 21.00°C ExtAct : 20. 00 °C Contro l: 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

4.2

4.3

4.4

4.5

>Setp. : 12 0. 00 °C Overt.:255.00°C Subtmp:-55.00°C St.Pump: 2

>Configuration Control param. Profile Start Int. Programmer

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

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:

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)

MENU key - for selecting the menu functions (Menu see page 42)

Cursor keys - Select menu items

4.6

4.7

4.8

4.9

....

P-key Selecting parameters

Escape key 1) Cancel entries

2) Return to a higher menu level Enter key 1) Store value / parameter

2) Next lower menu level Numeric keypad: numerals 0 to 9; minus / decimal point

Page 22

Operating controls and functional elements

Rear

Page 23

A M P

Si1

Control connector 230 V / max. 0.1 A

Si3

16 A

P 16

Si4 Si2

4 Mains circuit breakers (resettable) 16 A

F1 and F3  Compressor

F2 and F4 Heater, Pump

11a

13 + 14

17 + 18

19a

Motor protection circuit breaker for compressor motor

Mains power cable with plug

Pump connectors

Return Feed M16x1

Overflow connector M16x1

Connector for expansion vessel M16x1

Cooling water connectors LH41 G3/4" external thread IN - inlet OUT - outlet

Castor without brake (at the back)

Castor with brake (at the front)

Page 24

Operating controls and functional elements

4.1. The Presto Plus principle with closed external system

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

e.g. LH47; double-sided glass vessel

indicates 3 or 4 batons (see –Filling volume- page 31). Then, by

pressing the key (23) is started. In intervals the tempering liquid is pumped via connection (13) into the external system (33) and led back into the heat exchanger (20) via connection (14). 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). The temperature system can be cooled with air (32 / LH47) or water (LH50). Connect the cooling water to the lead in for cooling water (18). Lead the outflow for cooling water (17) into the locally provided drain respectively backflow.

The temperature system is started with the key the circulating pump (23) start according to the desired adjustments at the operating device RD (4). In the line to the pump 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 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).

an automatic filling and venting mode with activation of the circulating pump

. The heating (21), the cooling aggregate (22) and

Page 25

5. Preparations

5.1. Bath fluids

Caution:

Carefully read the safety data sheet of the bath liquid used, particularly with regard

Recommended bath liquids for external, c l osed systems:

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

Caution:

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

ATTENTION: The maximum permissible viscosity is 50 mm2 / S

Please contact JULABO before using other than recommended bath liquids. JULABO assumes no liability for damage caused by the selection of an unsuitable bath fluid. Unsuitable bath fluids are fluids which, e.g.,  are highly viscous

(much higher than 50 mm2 / S at the respective working temperature)

 have a low viscosity and have creep characteristics

 have corrosive characteristics or  tend to crack.

Caution:

See website for list of recommended bath fluids.

Contact: see page 6

No liability for use of other bath fluids!

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

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.

Page 26

Preparations

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

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 31).

Page 27

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

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

Pressure max. 6.0 bar at +20 °C

4.6 bar at +200 °C

3.8 bar at +350 °C

Warning:

0.5 m

1.0 m

1.5 m

3.0 m

0.5 m

1.0 m

1.5 m

3.0 m

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 28

Preparations

5.3. Installation

Caution:

Danger of tipping

 Lift the unit only with a crane using the lifting strands and the wooden crate (see  The recessed grips on the side are not suited for lifting the unit!  Max. permissible application of force to the upper side 220 N.  The unit is not suitable for use in explosive environment

pictures on page 2) Careful positioning of the unit on its rollers is permitted. Danger of tipping if larger force is applied.

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

nonflammable 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 install the unit in the immediate vicinity of heat

sources and do not expose it to sunlight.

 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.

5.4. Connect the external system

The temperature systems are designed for temperature

application to closed, external systems (loop circuits). 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.

 The place of installation should be large enough and

provide sufficient air ventilation to ensure the room does not warm up excessively because of the heat the instrument rejects to the environment. (Max. permissible ambient temperature: 40 °C). For a fault (leakage) in the refrigeration system, the standard EN 378 prescribes a certain room space to be available for each kg of refrigerant. The refrigerant quantity is specified on the type plate.

> For 0.52 kg of refrigerant R404A, 1 m

of space is

required.

Page 29

Caution:

Securely attach all tubing to prevent slipping.

Connecting the external system:

 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 24

 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 than the exit „Overflow“.

 If required, the connector (16) may be used for

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

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 26).

 Close the expansion vessel with the cover Das

Order No. 8 970 831 Expansion vessel 5 liters

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.

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.

Important: Leakage on shaft sealing The shaft sealings of the pump are never absolutely tight. But this does

not have an impact on the proper functioning of the instrument. The slight leakage that appears ensures good sliding properties of the sealing. Any excess fluid is drained via the overflow connector (15).

Page 30

Preparations

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 35). 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.

5.5. Cooling water connection LH 50

OUT

Notice: Cooling water circuit

Even high quality heat exchangers as they are installed in our equipment can be damaged by unsuitable cooling water. The quality of the cooling water depends on the local conditions. The heat exchanger may become leaky due to corrosion or it may become clogged due to particulate matter

Caution:

Securely attach all tubing to prevent slipping.

 Supply cooling water via the inlet (18).  Conduct the cooling water via the outlet (17) in the

Example: PVC-tubing

respective sink or return flow circuit.

Cooling water connectors G3/4" external thread Tubing 12 mm inner dia. tubing

12 mm inner dia.

Cooling water see page 14

Page 31

5.6. Power connection

Check to make sure that the line voltage matches the supply

Caution:

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

earth)!

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

must be always easily accessible.

 Never operate equipment with damaged mains power cables.  Regularly check the mains power cables for material defects (e.g. for cracks).

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

voltage specified on the identification plate. Deviations of ±10 % are permissible

 Connect the mains plug (12) to a power socket with earthing

contact (PE – protective earth)!

5.7. 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.

Indication max: 11 liters (LH 47)

18.5 liters (LH 50)

Indication min:

3.0 liters (LH 47)

10.5 liters (LH 50)

Notice:

First connect the external system! (see page 28)

Take care no bath liquid enters the interior of the unit. Filling volume LH47 LH50

(without external approx. liters approx. liters system connected) 2.5 10

- in the heat exchanger 2.5 10

- in the internal reservoir 8.4 8.4

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 26).

For temperature applications to +250 °C fill up to marker "HT", for applications to for example –50 °C fill up to marker "TT".

Page 32

Preparations

5.7.1. Filling of external, closed systems

Section 1

ALARM CODE 14

Section 2

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

 Press the key

 The liquid level in the unit falls.

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

 Connect the unit to a mains power socket (see page 31) and

turn on the unit with the mains power switch (1).

until the self-test is completed.

As soon as the pump pressure indication in the 3 Info-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.

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.

complete filling according to the application task. See page 31 - marker "HT" or "TT".

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.

 Watch the level indication

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

to start the automatic filling process.

. During the filling

line of the VFD-

Pump >Pump OFF Mode:Sys close

 Press  The message >SELECT SYSTEM<is a demand to make now an

adjustment in the menu >Pump<. In the sub >Pump< the unit has to be set on >Mode:< >sys close< . (see page 33 Adjusting Mode: )

 The unit is now ready for operation .

to finish the automatic filling process.

Page 33

Notice:

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

The message >SELECT SYSTEM<is a demand to make an adjustment in the menu >Pump<. The insertion is effected cyclicly until the adjustment has been made.

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 24)

Press the respective keys in the following order:

1. MENUE key

2. Cursor key

3. Enter key

4. Cursor key

5. P- key

6. Enter key

7. Escape key 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 close < CLOSED SYSTEM Switch over to > fill < FILL SYSTEM Switch over to >drain< DRAIN SYSTEM

up to Submenu "Pump"

1x up to "Pump"

sys close / fill / drain

Page 34

Preparations

5.8. 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 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.

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

Caution: Escape of vapors / gas

 The necessity of degassing requires that a closed system is not entirely sealed.

Especially at increased working temperatures vapor / gas may escape. Ensure sufficient ventilation at the place of installation!

 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“

current set temperature.

Page 35

5.9. Draining

Notice:

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

S 20.00 P x.xx

Pump >Pump OFF Mode: drain

ALARM CODE 14

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

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

protection.

 Turn on the temperature system with the mains power

switch or press the stop key

MODE.

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

>drain<. (see page 33 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 !

to make the unit enter the STOP-

 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 LH50 has two drain screws. Both have to be used.

 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 28)

 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.

(Cleaning the unit see page 72)

Page 36

Operating procedures

6. Operating procedures

6.1. Switching on / Selecting the language

Switching on:

 The unit is operated by pressing the mains power switch (1).

The integrated pilot lamp illuminates.

JULABO P R E S T O

V1.45-1

 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.

Soll: 20.00°C IntIst xxx.00°C

>Konfiguration

ExtIst:

Regelparameter

Konfiguration

Regelung:

Identif. xxxxx Sollwert xxxxx Autostart xxx Standby xxxx >Sprache xxxxxxx

Setp.: 20.00°C IntAct xxx.xx°C ExtAct: xx x. xx °C Control: intern

 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) or remote control mode (operation via PC).

Selecting the language:

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

Press the respective keys in the following order:

1. MENU key

2. Enter key

3. Cursor key

4. P-key

5. Enter key

6. Escape key

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

up to Submenu "Sprache/Language"

Page 37

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

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

Stop-Mode

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 adjustment has been made (see page 33 Adjusting Mode: )

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

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 close <  CLOSED SYSTEM The temperature system runs.

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.

Stop:

 Press the start/stop key

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

S 20.00

ID 0

The unit also enters the safe operating state "OFF" after a mains power interruption. 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 38

Manual operation

7.2. Direct setting of the working temperature

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

7.3. Settings in the SET menu

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).

 Press the key

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:

to call up the SET menu. It is then

 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  Press escape

7.3.1. Setting the working temperature

>Setp. : 200 .0 0° C Overt.: 255.00°C Suptmp: -55.00°C St.Pump: 2

>Setp: Setting the working temperature

 Setting in line 1.

>Setp. : 12 0. 00 °C Overt.:255.00°C Subtmp:-55.00°C St.Pump: 2

The value previously set appears on the DIALOG-DISPLAY (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.

to swap the lines.

to quit the SET menu.

Page 39

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 DIALOGDISPLAY (LCD).

Setp.: 120.00°C >Overt.:130.00°C Subtmp:-55.00°C St.Pump: 2

Setp.: 120.00°C Overt.:130.00°C >Subtmp:110.00°C St.Pump: 2

>Overt: Setting the high temperature limit

 Setting in line 2.

The value previously set appears on the DIALOG-DISPLAY (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.

>Subtmp: Setting the low temperature limit

 Setting in line 3.

The value previously set appears on the DIALOG-DISPLAY (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.

Example:

Setp: 120. 00 °C IntAct 130.50°C ExtAct : --. -- °C Control: Intern

Excess temp.

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.

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

Page 40

Manual operation

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.

>St.Pump: Setting the pump pressure stage

Setp.: 120.00°C Overt.:130.00°C Subtmp:110.00°C >St.Pu mp : 4

 Setting in line 4.

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

 Use the keypad to enter the new 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.

7.4. Setting the safety temperature (with shutdown function)

 Check the safety installations at least twice a year! See page 17.

TANK 150

RES 100

160

ALARM CODE 14

ALARM! IntAct : xx. xx °C ExtAct : --. -- °C Temp/level alarm

320

°C

130

220

°C

240

180

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

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.

(example: 4).

 Press enter to store the selected value.

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).

Page 41

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

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.

to indicate the safety temperature value in

 Press enter

 After eliminating the malfunction, press the mains power switch

off and on again to cancel the alarm state.

Warning:

 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.

to quit the audible signal.

Page 42

Menu functions

7.5. Internal / external control

ext. Pt100

S xx.xx

ID 0

Setp: 120. 00 °C IntAct 21.00°C ExtAct : 20. 00 °C Contro l: Intern

Setp: 120. 00 °C IntAct 21.00°C ExtAct : 20. 00 °C Contro l: Extern

Int



S 120.00

E 20.00



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 59) and then securely fix the sensor in the external system.

To swap internal to external control:

 Press the key

control type.

 The DIALOG-DISPLAY (LCD) indicates the effective control

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

 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

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

in operating state "OFF" to select the

to swap the display.

Caution:

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

8. Menu functions

 Press the MENU key  Use the up/down cursor keys

submenu and press enter

 Press escape

>E xx.xx°C< by pressing the key

to enter the menu level.

to return to the previous menu level.

to select the desired

Page 43

Page 44

Menu functions

8.1. Configuration

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

 Press enter  Use the up/down cursor keys

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

 Press the P-key

 Press escape

> 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:

to select the configuration submenu.

to select the desired

to select the parameter and press enter

to return the previous menu level.

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 45

Setp.: 50.00°C IntAct: 50.00°C

Eprog: 50.00°C

ExtAct: 50.00°C

IntAct: 50.00°C

Rs232: 50.00°C

Control: intern

Power: 50 %

IntAct: 50.00°C

Control: intern

Power: 50 % Control: intern

S xx.xx

ID 0

REG+E-PROG

SERIAL

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

> Setpoint

The instrument provides three possibilities for setpoint selection. The active mode is indicated on the DIALOG-DISPLAY (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- Setpoint setting via keypad (Setp.:) or via the integrated

programmer.

eprog - Setpoint setting via the analog interface REG+E-PROG

(3.1) connection with an external voltage or current source or a programmer. (see page 55)

RS232 - Setpoint setting 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 46

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.

STAND-BY

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 input

External stand-by for emergency switch-off (connector - see page 6)

Possible parameters:

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

S xx.xx

ID 0



> Language

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

Possible parameters:

German (deutsch) English (engl).

>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 47

8.2. Control parameters

Xp =

When performing an identification for the controlled system (temperature applications system) (see page 44), 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

parameters".

 Use the up/down cursor keys

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

Proportional range >Xp<

to select the submenu "control

to select the

to return to the previous menu level.

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 48

Menu functions

>DynInt< - Dynamics

This parameter affects the march of temperature only in case of internal control (see page 42)

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.

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

case of external control (see page 42). 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

Xp too high or Tv too high

Inappropriate settings may produce the following heat-up curves:

Xp too low

The heat-up curve reveals inappropriate control settings.

Tv/Tn too low

Tv/Tn too high or Xp too high

Page 49

8.3. Start of a profile

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:

S xx.xx

P x.xx

S 100.00

P xx.x

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  Use the up/down cursor keys

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

Press the P-key and press enter

to select the submenu "Profile Start".

to select the respective parameter

to select the

Page 50

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.

Int

Press the P-key

 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.

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 select the parameter and press enter

to swap the values in line 1 and line 3.

Page 51

8.3.1. Interrupting a profile

STAND-BY

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).

 A profile can be interrupted or restarted by an external

emergency shut-off (see page 6).

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 46).

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 46

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 52

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.

 Press enter  Use the up/down cursor keys

option. Then press enter 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

Setting clock

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

to select the submenu "Int. Programmer".

to select the desired

to open.

Examples:

 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 53

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.

Step

Edit Profile: 1 >Step: 3 Setp: 50:00°C Time[h.m] 00:02

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

Display sections:

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

to select the submenu

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 54

Menu functions

Delete

 A flashing segment indicates that the respective profile

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

 delete no / yes

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

numbers of the sections to be deleted. Press enter

Press the P-key enter

Line 4 indicates the deletion. Example:

Delete section 8 to section 34 in profile 3.

 Press escape

to select the parameter "yes" and press

to return to the previous menu level.

Page 55

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  Use the up/down cursor keys

option and press enter

to select the inputs/outputs submenu.

to select the desired

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 set with enter

to select the desired output value and

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 56

Menu functions

0 V

10 °C 210 °C



200 K

197 °C 202 °C



5 K

0 mA 4 mA

20 mA

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

EPROG - Input

This input is necessary when the nominal value is to be determined and set by an external programmer (see page 45 )

REG+E-PROG

1. Connect the external voltage or current source or 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 45)

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

Voltage voltage input Current current input

Select the desired input value with the P-key

 "L Value" - Setting the LOW value::

enter

and set with

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

the appropriate buttons on the keypad and press enter

set.

 "H Value" - Setting the HIGH value:

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

the appropriate buttons on the keypad and press enter

set.

 Return to the standard display by pressing escape

Page 57

300

250

200

150

100

80 60 40 20

12345678910 V 246810 14 18 20 m

Example:

 Set the external voltage or current source output for the

equivalent of 50 °C temperature setpoint.

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

the temperature value adjusted and set on the external voltage or current source is displayed in line 1 (Example: EPROG 50.00 C).

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). Wait appr. 30 seconds.

2) Assign a lower temperature threshold value to this adjusted voltage/current value by pressing the appropriate buttons on the keypad of the instrument (Example A: 20 C ) and set by

pressing enter

 "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). Wait appr. 30 seconds.

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 58

Menu functions

8.6. Limits

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

with enter

 Return to the previous menu level with escape

to select the desired parameter and set

Page 59

8.8. Sensors

Notice:

ATC Int: Do not alter the factory-setting!

ext. Pt100

Calibrated thermometer (T

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

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.

Presto: Pt100 sensor (T

Setp.: xx.00°C IntAct xx.00°C ExtAct : 51. 22 °C Contro l: Intern

Important:

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

ExtIst

 Read the temperatures of the calibrated thermometer (T

the external Pt100 sensor (T

) in their respective displays.

ExtIst

) and

 Calculate the temperature difference and enter and set this

difference value as the ATC external compensating parameter.

)

(Example: T = T

- T M = 1.22 K)

ExtIst

 Use the keypad to enter the desired compensating value

(e.g. 1.22 °C) and set with enter

Page 60

Menu functions

8.9. 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 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 close

 Press the P-key

with enter

 Return to the previous menu level with escape

to select the desired parameter and set

Explication of terms: >Mode: System closed<stands for closed, external system.

(Presto

principle page 24)

>Mode: drain<. (Chapter „Draining“ see page 35) In the configuration of this unit the >Mode: fill< means the same as >Mode: drain<.

Page 61

9. Troubleshooting guide / Error messages

Whenever the microprocessor electronics registers a failure, a complete

+ 

ALARM CODE 14

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

CODE 05

CODE 06

CODE 07 CODE 12 CODE 13

Defect temperature sensor in refrigeration circuit. Repair by authorized JULABO service personnel.

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

Defect of the working or safety temperature sensor. Working temperature and safety sensors report a temperature difference of more than 50 K.

Other errors (I2C-BUS errors) Error in A/D converter. 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

CODE 15 CODE 16 CODE 17 CODE 31

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.

External control selected, but external Pt100 sensor not connected. Heating circuit interrupted. Heating circuit short-circuited. Communication between control module RD and instrument interrupted.

Page 62

Troubleshooting guide / Error messages

Warnings without a complete shutdown of the unit

Warning CODE 40

CODE 03 CODE 04 CODE 20

CODE 21

CODE 40



Excess temperature warning

Low temperature warning

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

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

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.

Si1

Si3

Si4Si2

LH47

Fuses:

The mains fuses are safety cutouts. 4 Mains circuit breakers (resettable) 16 A

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

2 Mains circuit breakers (resettable) 10 A for the pump-motor

LH50

4 Mains circuit breakers (resettable) 16 A

Motor protection circuit breaker for compressor motor

Page 63

10. Electrical connections

1 6

SERIAL

Important:

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

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 V Signal GND Pin 7 RTS Request to send Pin 8 CTS Clear to send

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

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!

RS232 interface cable Circulator (9-pol) PC (9-pol) Pin 2 RxD  Pin 3 TxD Pin 3 TxD  Pin 2 RxD Pin 5 GND  Pin 5 GND Pin 7 RTS  Pin 8 CTS Pin 8 CTS  Pin 7 RTS

Accessories: Order No. Description

8 980 073 RS232 interface cable 9-pol./9-pol. , 2,5 m 8 900 110 USB interface adapter cable

Page 64

Electrical connections

Programmer input / temperature recorder output (3.1)

REG+E-PROG

ALARM

Analog inputs / outputs see page 55 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 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

Socket for external Pt100 sensor (3.4)

Pt100

ext. Pt100

Shield Plug

solderin

Look on

side

Pin assignment:

Pin Signal 1 I+

2 U+ 3 U 4 I-

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

Page 65

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 46).

 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 DIALOG-DISPLAY (LCD) flashes and displays the message "STAND-BY".

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 46)

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 49 and 51).

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.

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Remote control

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

11. Remote control

11.1. Setup for remote control

Select the "Configuration" submenu and select the option "Setpoint" to define the interface (see page 45).

RS232 RS485

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 58.)

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.

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11.2. 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).

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 : in_sp_00 A032_in_sp_00

Response from the instrument:

55.5

A032_55.5

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Remote control

11.3. 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

version status

in_pv_00 in_pv_01 in_pv_02 in_pv_03 in_pv_05

in_sp_00 in_sp_03 in_sp_04

Parameter Response of instrument

none Number of software version (V X.xx) none Status message, error message (see page 71)

none Actual bath temperature. none Heating power being used (%). none Temperature value registered by the external Pt100 sensor. none Temperature value registered by the safety sensor. >TANK< none Pump pressure in bar.

none Working temperature none none

High temperature warning limit Low temperature warning limit .

in_sp_05

in_sp_07

in_hil_00 in_hil_01

in_mode_02

in_mode_03

in_mode_04

none Setpoint temperature of the external programmer

(socket 3.1 - REG+E-PROG) .

none Pump pressure stage

none Max. cooling power (%). none Max. heating power (%).

none Identification type:

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

none Type of the programmer input:

0 = Voltage 0 V to 10 V 1 = Current 0 mA to 20 mA

none Internal/external temperature control:

0 = Temperature control with internal sensor.

1 = Temperature control with external Pt100 sensor.

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Command

Parameter Response of instrument

in_mode_05

in_mode_08

in_par_01 in_par_02 in_par_03 in_par_04

in_par_06 in_par_07 in_par_08

none Temperature system in Stop/Start condition:

0 = Stop 1 = Start

none Adjusted control dynamics

0 = aperiodic 1 = standard

none Time constant of the external bath. none Internal slope. none Time constant of the internal bath. none Band limiting (max. difference between the temperatures in the

internal bath and external system).

none Xp control parameter of the internal controller. none Tn control parameter of the internal controller. none Tv control parameter of the internal controller.

in_par_09 in_par_10 in_par_11 in_par_12 in_par_13

in_par_14

out commands: Setting parameters or temperature values.

Command

none Xp control parameter of the cascade controller. none Proportional portion of the cascade controller. none Tn control parameter of the cascade controller. none Tv control parameter of the cascade controller. none Adjusted maximum internal temperature of the cascade

controller.

none Adjusted minimum internal temperature of the cascade controller.

Parameter Response of instrument

out_mode_01

out_mode_02

0 Use working temperature

0 No identification.

Temperature control by using the stored parameters.

1 Single identification of controlled system after the next start.

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Remote control

Command

out_mode_02

out_mode_04 out_mode_04

out_mode_05 out_mode_05 out_mode_08 out_mode_08

out_sp_00 out_sp_03 out_sp_04

Parameter Response of instrument

2 Continual identification of controlled system whenever a new

setpoint is to be reached.

0 Temperature control of internal bath. 1 External control with Pt100 sensor.

0 Stop the unit = R –OFF-. 1 Start the unit. 0 Set the control dynamics - aperiodic 1 Set the control dynamics - standard

xxx.x Set working temperature. xxx.x xxx.x

Set high temperature warning limit Set low temperature warning limit .

out_sp_07

out_hil_00

out_hil_01 out_par_04

out_par_06 out_par_07 out_par_08 out_par_09 out_par_10 out_par_11 out_par_12

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

-xxx Set the desired maximum cooling power (0 % to 100 %). Note: Enter the value with a preceding negative sign!

xxx Set the desired maximum heating power (10 % to 100 %). xxx Band limiting during external control.

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

xxx Xp control parameter of the internal controller. xxx Tn control parameter of the internal controller. xxx Tv control parameter of the internal controller. xxx Xp control parameter of the cascade controller. xxx Proportional portion of the cascade controller. xxx Tn control parameter of the cascade controller. xxx Tv control parameter of the cascade controller.

out _par_13 out _par_14

xxx Maximum internal temperature of the cascade controller. xxx Minimum internal temperature of the cascade controller.

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11.4. 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

or 01 MANUAL START,DEGASING

Presto in keypad control mode or Presto in keypad control mode and degasifying active

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

or 03 REMOTE START,DEGASING

Presto® in remote control mode. or Presto in remote control mode and degasifying active

Error messages Description

-02 REFRIGERATOR ALARM

-03 EXCESS TEMPERATURE WARNING

-04 LOW TEMPERATURE WARNING

-05 WORKING SENSOR ALARM

Defect temperature sensor in refrigeration circuit. High temperature warning "

Low temperature warning " ". 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 50 K.

-07 I2C-BUS ERROR

Internal error when reading or writing the I

-08 INVALID COMMAND

Invalid command.

-09 COMMAND NOT ALLOWED IN CURRENT OPERATING MODE

-10 VALUE TOO SMALL

Invalid command in current operating mode.

Entered value too small.

-11 VALUE TOO LARGE

Entered value too large.

-12 TEMPERATURE MEASUREMENT

Error in A/D converter.

ALARM

-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 Low level alarm.

C bus.

Page 72

Cleaning the unit

Error messages Description

-15 EXTERNAL SENSOR ALARM

-16 TRIAC/RELAY CONNECTION OPEN

-17 TRIAC SHORTED

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

-21 WARNING: COMPRESSOR STAGE 1 DOES NOT WORK

-26 WARNING: STAND-BY PLUG IS MISSING

-31 INTERNAL COMMUNICATION ERROR

-40 NIVEAU LEVEL WARNING

External control selected, but external Pt100 sensor not connected.

Heating circuit interrupted.

Heating circuit short-circuited.

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

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

External stand-by contact is open. Stand-by input - see pages 46 and 6.

Communication between remote module RD and instrument interrupted.

Low liquid level warning in the internal reservoir.

12. Cleaning the unit

Caution:

Always turn off the unit and disconnect the mains cable from the power source before cleaning the unit. Prevent humidity from entering into the circulator.

Electrical connections and any other work must be performed by qualified personnel only.

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.

Page 73

Caution:

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

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

 Take care the room where cleaning takes place is well ventilated.

S 20.00

ID 0

 Set the working temperature setpoint.

Recommendation: 20 °C

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.

Preparations:

1. Drain the temperature system. See chapter 5.9. 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 74

Cleaning the unit

Cleaning is performed in two steps.

First rinse the internal reservoir, the tubing lines and the heat exchanger. As second step, carefully remove the cleaning liquid.

Pump >Pump OFF Mode: Sys cl os e

1. Cleaning internal reservoir, tubing lines and heat exchanger:

 Fill the temperature system with cleaning liquid.

See chapter 5.7. 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

Pump >Pump OFF Mode: drain

 Press the start key

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 5.9. Draining

2. Removing the cleaning liquid:

 Switch on the unit with the mains switch!

The venting valve 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.

and allow the liquid to be pumped through

Page 75

13. Maintaining / repairing the unit

Caution:

Always turn off the unit and disconnect the mains cable from the power source before cleaning the unit. Prevent humidity from entering into the circulator.

Electrical connections and any other work must be performed by qualified personnel only.

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.

Water-cooling: To maintain the full cooling performance, clean the filter in the

cooling water entry from time to time.

 Switch off the unit, disconnect mains power cable.  Interrupt the cooling water supply.  Disconnect the tubing from the inlet "IN" (18) and remove

the dirty filter.

 Clean the filter.  Replace the filter and reconnect the tubing.  Open the cooling water supply.  Check the tubing connection for tightness.  Unit is ready to operate.

Page 76

Maintaining / repairing the unit

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.

JULABO LH 50 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual