Julabo LC4 F Operating Manual

19515213.DOC

English

Operating manual

Temperature Controller

LC4 F

JULABO Labortechnik GmbH
77960 Seelbach / Germany
 +49 (0) 7823 / 51-0

 +49 (0) 7823 / 24 91
| [e-mail]
Þ www.julabo.de

1.951.5213 01/11

2

Congratulations!

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

The JULABO Quality Management System

Temperature control devices for research and industry are developed,
produced, and distributed according to the requirements of

ISO 9001:2008. Certificate Registration No. 01 100044846

Unpacking and inspecting

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

Printed in Germany Changes without prior notification reserved

LC4 F

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INDEX

OPERATING MANUAL.........................................................................................4

1. INTENDED USE..............................................................................................4

1.1. Description .....................................................................................................4

2. OPERATOR RESPONSIBILITY – SAFETY RECOMMENDATIONS .............4

2.1. Disposal..........................................................................................................6

2.2. EC Conformity................................................................................................7

2.3. Warranty conditions........................................................................................7

2.4. Technical specifications..................................................................................8

OPERATING INSTRUCTIONS...........................................................................10

3. SAFETY NOTES FOR THE USER................................................................10

3.1. Explanation of safety notes ..........................................................................10

3.2. Explanation of other notes............................................................................10

3.3. Safety recommendations..............................................................................10

4. OPERATING CONTROLS AND FUNCTIONAL ELEMENTS .......................12

5. OPERATING PROCEDURES .......................................................................14

5.1. Installation....................................................................................................14

5.2. Power connection.........................................................................................14

5.3. Connecting a heating device ........................................................................15

5.4. Connecting the temperature sensors............................................................15

5.5. Applications.................................................................................................. 16

5.6. Switching on / Start - Stop............................................................................18

5.7. Setting the temperature................................................................................19

5.8. Self-tuning the PID-control parameters Xp, Tn und Tv.................................20

5.9. Setting the PID control parameters Xp, Tn and Tv....................................... 21

5.9.1. Optimization instructions for the PID control parameters.................23

5.10. Setting the safety temperature (with shutdown function)..............................24

6. MENU FUNCTIONS ......................................................................................26

6.1. Sensor calibration - ATC / SF or AF-............................................................26

6.2. Temperature recorder output - AO -............................................................. 27

6.3. Programmer input - EP -...............................................................................28

6.4. Programmer input scale - EPH / EPL -.........................................................28

6.5. Interface parameters H - P - br - r -.............................................................32

6.6. Controlling the heater capacity - h -.............................................................. 33

6.7. Active countercooling - Pc -..........................................................................33

6.8. Warning functions - LL / HL -........................................................................34

7. TROUBLESHOOTING GUIDE / ERROR MESSAGES.................................35

8. ELECTRICAL CONNECTIONS.....................................................................36

9. REMOTE CONTROL.....................................................................................39

9.1. Communication with a PC or a superordinated data system........................39

9.2. List of commands .........................................................................................40

9.3. Status messages..........................................................................................40

9.4. Error messages............................................................................................41

10. CLEANING / REPAIRING THE UNIT............................................................42

Operating manual

4

Operating manual

1. Intended use

Fulfilling its principle task, reliable temperature control and measurement, the LC4F
temperature controller also implements safety and monitoring functions, particularly in the
areas of chemical research and quality control. The sophisticated capabilities of the unit allow
wide application with electrical heating devices such as
heating hoods, heating baths,
heating pads and bandages,
water and oil baths.

JULABO Temperature controllers 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

Setting is rapid and simple using the keypad with its easy to learn symbols. Keypad is splash­proof, easily cleaned and ergonomically designed. The microprocessor technology allows the
working temperature setpoint and five parameter sets to be stored and indicated on the
MULTI-DISPLAY (LED).
The safety value for excess temperature protection, a safety installation independent from the
control circuit, is adjustable on the front and visible on the MULTI-DISPLAY (LED).
The RS232C port permits modern process engineering without additional interface, directly
on-line from the controller to your application equipment.
The LC4 F temperature controller conforms to the safety requirements specified by DIN 12
876 as well as the guideline for first voltage range EN 61010.

2. Operator responsibility – Safety recommendations

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

¾ The operator is responsible for the qualification of the personnel operating the units.
¾ 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.

¾ Make sure all persons tasked with operating, installing, and maintaining the unit have read

and understand the safety information and operating instructions.

¾ When using hazardous materials or materials that could become hazardous, the circulator

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

LC4 F

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

Contact:

JULABO Labortechnik GmbH
Eisenbahnstraße 45
77960 Seelbach / Germany

Tel. [phone] / 51-0 [e-mail]
Fax [phone] / 24 91 www.julabo.de

Safety instructions for the operator:

¾ You have received a product designed for industrial use. Nevertheless, avoid strikes to

the housing, vibrations, damage to the operating-element panel (keypad, display), and
contamination.

¾ 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.

¾ Make sure that the mains power supply has low impedance to avoid any negative effects

on instruments being operated on the same mains.

¾ 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.

¾ Permissible ambient temperature: max. 40 °C, min. 5 °C.
¾ Permissible relative humidity: 50% (40 °C).
¾ Do not store the unit in an aggressive atmosphere.
¾ Protect the unit from contamination.
¾ Do not expose the unit to sunlight.

Appropriate operation

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

Use:

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

Operator responsibility – Safety recommendations

6

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:
1

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

2

or

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

Scope: EU

2

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

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 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 respective safety recommendations. Also observe the pin
assignment of plugs and technical specifications of the products.

2.1. Disposal

Valid in EU countries
Directive 2002/96/EC of the European Parliament and of the Council of 27
January 2003 on waste electrical and electronic equipment (WEEE).
This directive requires electrical and electronic equipment marked with a
crossed-out trash can to be disposed of separately in an environmentally
friendly manner.
Contact an authorized waste management company in your country.
Disposal with household waste (unsorted waste) or similar collections of
municipal waste is not permitted!

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2.2. EC Conformity

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

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 Labortechnik GmbH
Eisenbahnstr. 45
77960 Seelbach / Germany

2.3. Warranty conditions

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

for a period of ONE YEAR.

Extension of the warranty period – free of charge

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

To apply for this extended warranty the user must register the unit on the JULABO web site
www.julabo.de, indicating the serial no. The extended warranty will apply from the date of
JULABO Labortechnik GmbH’s original invoice.

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

Any other compensation claims are excluded from this guarantee.

Operator responsibility – Safety recommendations

8

2.4. Technical specifications

LC4F

Adjustable temperature range °C -50 .... 350

Display accuracy % ±0.5 ± 1 Digit

Temperature stability
(depending on substances in the bath)

°C >±0.03

Temperature selection digital
via keypad indication on MULTI-DISPLAY (LED)
remote control via computer indication on monitor
Temperature display MULTI-DISPLAY (LED): 4-digit

Working temperature: 4-digit

Resolution °C 0.1
ATC function °C ±9.99
Temperature control PID
Control parameters set via self-tuning or individually
Working temperature sensor Pt100, 4-lead technique
Safety temperature sensor Pt100, 4-lead technique

Electrical connections:
Temperature recorder output

Programmer input
Conversions for LC4 F see page 9

4 ... 20 mA / 0 ... 20 mA

0 ... 20 mA / 0 ... 10 V

External alarm 24-0 V DC / max. 25 mA
Interface RS232C
Mains power socket
for heating device (at 115 V) W max. 1000; resistive load
or (at 230 V) W max. 2000; resistive load
Overall dimensions (WxDxH) cm 25 x 20 x 10
Weight kg 3
Ambient temperature °C 5 ... 40

Mains power connection ±10% V/Hz 230 / 50-60
Mains power connection ±10% V/Hz 115 / 50-60
Current draw A 10
Total power consumption (at 115 V) W max. 1050
Total power consumption (at 230 V) W max. 2050

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

LC4 F

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Conversions for LC4 F:
0 ... 10 V 1 V = -50 °C, 9 V = 350 °C
0 ...20 mA 2 mA = -50 °C, 18 mA = 350 °C
4 ... 20 mA 5,6 mA = -50 °C, 18,4 mA = 350 °C

Safety installations according to IEC 61010-2-010:
Excess temperature protection -50 °C ... 355 °C

Supplementary safety installations:
Supervision of the working sensor plausibility control
Alarm indication optical + audible (continuous tone)

Environmental conditions according to EN 61 010, part 1:
Use only indoor.
Altitude up to 2000 m - normal zero.
Ambient temperature: +5 ... +40 °C (for storage and transportation)

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 fluctuation of ±10 % are permissible.

Protection class according to EN 60 529 IP31

The unit corresponds to Class I
Overvoltage category II
Pollution degree 2

Caution:

The unit is not for use in explosive atmosphere

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

Operating instructions

10

Operating instructions

3. Safety notes for the user

3.1. Explanation of safety notes

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

Warning:

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

Caution:

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

Notice:

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

3.2. Explanation of other notes

Note!

Draws attention to something special.

Important!

Indicates usage tips and other useful information.

3.3. Safety recommendations

Follow the safety recommendations to prevent damage to persons or property.

Further, the valid safety instructions for working places must be followed.

• ConnOnly 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 always be easily accessible.

• Place the instrument on an even surface on a pad made of non­inflammable material.

• Observe the flash point of the bath medium used. The excess temperature

LC4 F

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protection should be set at least 25 °C below the fire point.

• Set up the heating device according to the instructions prior to connection to
the controller and ensure secure attachment to the bath.
Danger of burning and fire!

• Immerse both temperature sensors in the bath medium and ensure secure
attachment.

• 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.

• Check the filling level of the bath fluid from time to time. The heater must
always be fully covered with the bath fluid!

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

• 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.

• Transport the unit with care.

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

• Always empty the bath before moving the unit.

• Never operate equipment with damaged mains power cables.

• Observe all warning labels.

• Never remove warning labels.

• Always turn off the unit and disconnect the mains cable from the power

source before cleaning the unit.

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

• Some parts of the bath cover may become extremely warm during

continuous operation. Therefore, exercise particular caution when touching
these parts. Use safety glasses!

Operating controls and functional elements

12

4. Operating controls and functional elements

Rear view

1

Mains power switch, illuminated

A

Keypad: working area

2

Start / stop key

3

Working temperature setpoint

4

Control parameter Xp (proportional range)

5

Control parameter Tn (resetting time)

6

Control parameter Tv (lead time)

7

Tune key: determining the control parameters

LC4 F

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S

Keypad: safety area

8

Safety temperature setpoint

9

Key- Indicator light – alarm Reset safety temperature alarm

10

Key- Silent alarm signal

Indication of : A = MULTI-DISPLAY (LED)
S = Temperature of safety sensor SF

Indication of: A = Working temperature setpoint
S = Safety temperature setpoint

Cursors left/right
Edit keys (increase/decrease setting)
Enter key (store)

Indicator light - Heating
Indicator light - Cooling

11

Connector: Working sensor AF

12

Connector: Safety sensor SF

13

RS232C interface

14

Connector: Programmer input and
Temperature recorder output

15

Connector: / alarm output

16

Grounded mains socket for heating device
(Max. resistive load 1000 W at 115 V / 2000 W at 230 V)

17

Mains fuses, fuse holders

18

Mains power cable with plug

Operating procedures

14

5. Operating procedures

5.1. Installation

• The unit should be set up at a dry location.

• Place the unit in an upright position and do not obstruct

the ventilation.

• A wall distance of at least 10 cm must be maintained
for ventilation, allowing internal heat
to be conducted away from the unit.

• If one or more temperature controllers are set up in a
cabinet for example, take care of good ventilation
(waste heat per unit = approx. 60 Watts).

• The ambient temperature must not exceed 35 °C.
Ambient temperatures above 35 °C result in a failure of
the unit.

• Do not set up the unit in the immediate vicinity of heat
sources and do not expose to sun light.

5.2. Power connection

Caution:

• 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 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!

Make sure that the line voltage and frequency match the
supply voltage specified on the type plate.

Deviations of ±10 % are permissible.

LC4 F

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5.3. Connecting a heating device

Caution:

Set up the heating device according to the instructions or securely fix the unit in
the bath tank using appropriate means. Danger of burning and fire!

Connect the power plug to the grounded mains socket (16) on
the rear of the controller.

Caution:

Max. resistive load 1000 W at 115 V / 2000 W at 230 V.
Max. current 5 A at 115 V / 10 A at 230 V.

5.4. Connecting the temperature sensors

Connect both sensors prior to turning the unit on since an alarm
shutoff will be effected if the sensors are not connected
Connect the working sensor to the socket “AF” (12) and
the safety sensor to socket “SF” (11).

Sensor calibration:

When the controller is first used or whenever a sensor is
replaced, a working sensor calibration must be carried out
(ATC see page 26)

Caution:

Place both sensors into the bath medium and securely fix the sensors.

Operating procedures

16

5.5. Applications

Directly heated bath liquid:

• The bath liquid is directly heated via the heating device.

• Working and safety sensors must both be immersed in the bath liquid..

• Whenever countercooling is necessary (in case of temperature application near the

ambient temperature), cooling in the bath is performed through a cooling coil connected to
a solenoid valve and the MVS controller.

11 Connector: Safety sensor 11a Safety sensor
12 Connector: Working sensor 12a Working sensor
15 Connector for control cable 15a Control cable for MVS
16 Mains socket for heating device 16a Heating device / heating hood

25 MVS solenoid valve controller (order no. 9 790 000)
26 Solenoid valve 230 Volts (order no. 8 980 700)
27 Cooling coil
28 Tap water connection
29 Cooling water drain
30 Stirrer motor for bath circulation
31 Bath tank / round bottom flask with bath liquid

LC4 F

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Indirectly heated bath liquid:

• The bath liquid is indirectly heated.

• Working and safety sensors must both be immersed in the bath liquid.

Operating procedures

18

5.6. Switching on / Start - Stop

Switching on:
Turn on the mains power switch.
The unit performs a self-test. A signal sounds, and all

segments of the 4-digit displays as well as all indicator
lights will illuminate.

A S

Then the software version (example: n 0.0) and the model
description "LC 4" appear.

A S

The display "OFF", "rOFF" or “EOFF“ indicates the
controller is ready to operate.
The effective working temperature setpoint (example: 21.0
°C) and the permanently installed setpoints (example:

20.0 °C and 125.0 °C) are also indicated

The controller enters the operating mode activated before
switching the controller off,

keypad control mode (manual operation) or
remote control mode (operation via personal

computer) or
programmer control mode. (operation via external
programmer)

Start:
y Press the start/stop key.

- The MULTI-DISPLAY (LED) indicates the actual bath
temperature. (example: 21.0 °C)

Temperature control is carried out according to the
parameter set last effective.

Stop:

• Press the start/stop key.
The MULTI-DISPLAY (LED) indicates the message
"OFF".

LC4 F

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

5.7. Setting the temperature

A

Setting the working temperature:

1. Press the setpoint key

.
The indicator light blinks and the effective value appears
on the MULTI-DISPLAY (LED).

2. Use the cursor keys

to move left or right on
the display until the numeral you wish to change is
blinking.

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

4. Press enter to store the selected value (example:

37.0 °C).

The working temperature is maintained constant after a short
heat-up time.

Operating procedures

20

5.8. Self-tuning the PID-control parameters Xp, Tn und Tv

The parameters Xp, Tn and Tv are permanently and
automatically determined and stored by means of the self­tuning facility.

• Press the key and start the controller by pressing
the start/stop key.

• The indicator light has two functions:
If it lights up - the key is in use.

If it blinks – the self-tuning function is active.

Information:
For successful self-tuning, the controller heats above a
temperature difference of 20°C.

The control parameters are set too high if the selected
values cannot be reached under certain circumstances.
The control parameters are switched off so that they can
be reduced before operation.
Recommended: Xp = 4.0 °C
Tn = 150 s
Tv = 10 s

Self-tuning the control parameters display:

• Keep the setpoint key depressed. The control light blinks
and the effective setpoint of the parameters is shown on
the MULTIDISPLAY (LED).

It is not possible to change the setpoint manually while
the self-tuning function is switched on.

LC4 F

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5.9. Setting the PID control parameters Xp, Tn and Tv

If the self-tuning function is switched off, the controller will
use the stored values as the control parameters.
This value can be adjusted manually.

A

Setting the Xp (proportional range)

1. Press the key .

The indicator light blinks and the effective Xp value
appears on the MULTI-DISPLAY (LED).

2. Use the cursor keys to move left or right on

the display until the numeral you wish to change is
blinking.

3. Use the increase/decrease arrows

to

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

4. Press enter

to store the selected value (example:

12 °C).

Setting range for the Xp parameter: 0.1 to 49.9 °C

A

Setting the Tn (resetting time)

1. Press the key .
The indicator light blinks and the effective value for Tn
appears on the MULTI-DISPLAY (LED).

2. Follow the instructions

3. for

4. (example: 150 s).

Setting range for Tn: 1 to 9999 s.

Operating procedures

22

A

Setting the Tv (lead time)

1. Press the key .
The indicator light blinks and the effective value for Tv
appears on the MULTI-DISPLAY (LED).

2. Follow the instructions

3. for

4. (example: 14 s).

Setting range for Tv: 0 to 1000 s.
With Tv set to 0 eingestellt, the differential part of the
controller is deactivated (use of a P or PI type controller).

LC4 F

23

5.9.1. Optimization instructions for the PID control parameters

The heat-up curve reveals inappropriate control settings.

optimum setting

Inappropriate settings may produce the following heat­up curves:

Xp too low

Tv/Tn too low

Xp or Tv too high

Tv/Tn or Xp too high

Operating procedures

24

5.10. Setting the safety temperature (with shutdown function)

(excess temperature protection)

This safety installation is independent of the control circuit.
As soon as this safety installation is triggered, a complete
shutdown of the connected heating device is effected.

S

Setting the safety temperature:

1. Press the setpoint key .
The indicator light blinks and the effective value
appears on the MULTI-DISPLAY (LED).

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

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

4. Press enter to store the selected value (example:

45.0 °C).

Setting range: -50 °C bis 355 °C

Recommendation:

Set the safety temperature at 5 to 10 °C above the working
temperature setpoint.

+

A S

• The alarm is indicated by optical and audible signals

(continuous tone)

• The current value (the indicator S blinks) and the setpoint

remain static in order to allow the cause of the alarm to
be established.

LC4 F

25

To stop the safety temperature alarm:

1. Press the key to silence the alarm.

2. Determine the cause of the alarm.
Possible causes:

• The safety temperature setpoint is set lower than the

working temperature setpoint.

• The working sensor is not connected to the

temperature control medium.

• An exothermic reaction has caused a rise in

temperature.

3. Press the key to deactivate the alarm.
The controller resumes operation.

Warning:

The excess temperature protection should be set at least 25 °C below the
fire point of the bath liquid used!

In the event of wrong setting there is a fire hazard!
We disclaim all liability for damage caused by wrong settings!

Menu functions

26

6. Menu functions

A S

The setting of the parameters and the setpoints of the
controller can be dialed up at any time through the menu in
the working area and safety area of the keypad.

The ATC menu option, which is in the safety area of the
keypad, can only be used for calibrating the safety
sensor.

• Enter or exit the menu level by pressing the left arrow
and enter at the same time.

• Using the cursor keys select the menu

functions one by one.

Example:

ATC AO EP EPH ......

6.1. Sensor calibration - ATC / SF or AF-

Laborregler (TT)

Eichbad (TM)

The ATC (Absolute Temperature Calibration) function serves to
calibrate the working sensor „AF“ and the safety sensor „SF“.

Example: calibrate the working sensor „AF“

• Place the working sensor "AF" and the temperature sensor of
a thermometer in the calibration bath..

• Determine the difference temperature (ΔT=TM - TT)
and store as correcting factor (example ΔT = -0.26 °C) as
follows:

• With the edit keys change the menu function from
"Atc 0" to "Atc 1" and then press enter .

• Using the cursor keys and the edit keys

set the correcting factor (example -0.26 °C) and then

press enter .

LC4 F

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• After exiting the menu level, the corrected value (example:

36.7 °C) is indicated on the MULTI-DISPLAY (LED).

Recommendation:
In case a calibrated temperature measuring instrument is used,
the ATC function allows the controller to be used as testing
instrument according to ISO 9000.

6.2. Temperature recorder output - AO -

The temperature recorder output „REG“ can be connected to the
input of the recorder used in the application.

This arrangement is connected with a software and
hardware setting.

1. Software setting under menu option AO

Factory setting: 0
0 = electrical power output 4 ... 20 mA
1 = electrical power output 0 ... 20 mA

(Conversion for LC4-F: see page 9)

2. Hardware setting

Hardware setting is carried out in the equipment housing of
the S6 two-way switch.

For a description, see page 38

Menu functions

28

6.3. Programmer input - EP -

The programmer input „E-PROG“ can be connected to the output
of an external programmer used in the application

This arrangement is connected with a software and
hardware setting.

1. Software setting under menu option EP

Factory setting: 0

0 = electrical power output 4 ... 20 mA
1 = voltage input 0 ... 10 V

2. Hardware setting

Hardware setting is carried out in the housing of the S1 and
S2 two-way switches.

For a description see page 38

6.4. Programmer input scale - EPH / EPL -

The increase in the size of the output (see EP option above) can
be controlled on the LC4-F.
An EPH (E PROG High) and an EPL (E PROG Low) value can be
set via the menu option.

Factory setting:
EPH0 = 337.5 °C EPL0 = -99,9 °C
Resulting increases: 27,3 °C/mA
or 50 °C/V

Example in Diagram:
EPH0 = 160.0 °C EPL0 = 0.0 °C
Resulting increases: 10 °C/mA
or 20 °C/V

LC4 F

29

0 ... 10 V 1 V = -50 °C, 9 V = 350 °C
0 ...20 mA 2 mA = -50 °C, 18 mA = 350 °C
4 ... 20 mA 5,6 mA = -50 °C, 18,4 mA = 350 °C

Change-over to the range 0 ... 20 mA

Setting the upper value

• With the edit keys

change the menu function from

“ EPH0” to " EPH1" and then press enter .

• Using the cursor keys and the edit keys

set the upper limit (example: 350.0 °C) and then press

enter

.

Menu functions

30

Setting the lower value

• With the edit keys change the menu function from
“ EPL0” to " EPL1" and then press enter .

• Using the cursor keys and the edit keys
set the upper limit (example: 0.0 °C) and then press enter .

Change-over to the factory setting
range 4 ... 20 mA

Setting the upper value

• With the edit keys change the menu function from
“ EPH0” to " EPH1" and then press enter .

• Using the cursor keys and the edit keys
set the upper limit (example: 337.5 °C) and then press enter

.

Setting the lower value

• With the edit keys change the menu function from
“ EPL0” to " EPL1" and then press enter

.

• Using the cursor keys

and the edit keys

set the upper limit (example: -99.9 °C) and then press enter

.

LC4 F

31

Other ranges can be chosen freely

Example in Diagram:
EPH0 = 160.0 °C EPL0 = 20.0 °C
Resulting increases: 10 °C/mA
or 20 °C/V

Setting the upper value

• With the edit keys change the menu function from “
EPH0” to " EPH1" and then press enter .

• Using the cursor keys and the edit keys
set the upper limit (example: 160.0 °C) and then press enter

.

Setting the lower value

• With the edit keys change the menu function from “
EPL0” to " EPL1" and then press enter .

• Using the cursor keys and the edit keys
set the upper limit (example: 20.0 °C) and then press enter

.

Menu functions

32

6.5. Interface parameters H - P - br - r -

Whenever the parameter setting of the controller is not conform
to those of the connected personal computer, a modification is
necessary.

Factory setting of the RS232 interface:
Baudrate: 4800 Bauds
Parity: 2 (even)
Handshake: 1 (Hardware handshake)
Data bits: 7
Stop bits: 1

• Use the edit keys to set the desired parameter
and then press enter .

Adjustable interface parameters
HANDSHAKE

0 = Xon/Xoff-Protokoll (Softwarehandshake)
1 = Protokoll RTS/CTS (Hardwarehandshake)

PARITY 0 = no Parity
1 = odd
2 = even

BAUDRATE 48 = 4800 bauds
96 = 9600 bauds

REMOTE 0 = keypad control mode
1 = remote control mode via RS232C
2 = External programmer

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

LC4 F

33

6.6. Controlling the heater capacity - h -

This control allows the maximum effective heater capacity of the

connected heating device to be adjusted in 10 % steps between
10 % and 100 %. The gradient of the temperature rise function
may thus be controlled to permit gentle warming of thermally
sensitive substances and to prevent over-shooting.

Controlling the heater capacity:

• Using the edit keys set the desired maximum
heater capacity and then press enter .

(example: 70 %).

Factory setting: 100 %

6.7. Active countercooling - Pc -

For applications near the ambient temperature, countercooling
might become necessary.
For this purpose, connect the JULABO MVS solenoid valve

controller to the / alarm socket (application example see page

16). The supply of a cooling pulse "Pc" must be activated on the

controller.

Activating the supply of a cooling pulse:

• With the edit keys change the menu function from
“Pc 0” to "Pc 1" and then press enter

.

Factory setting: "Pc 0" (no countercooling).

Whenever countercooling is not necessary, reset the “Pc”
parameter to 0.

Menu functions

34

6.8. Warning functions - LL / HL -



)) )) ))

More protection for your samples in the bath!
An audible signal sounds in intervals when the actual temperature
value exceeds one of the set limits (patented).

Setting the lower limit

• With the edit keys change the menu function from
“LL 0” to "LL 1" and then press enter .

• Using the cursor keys and the edit keys
set the lower limit (example: 15.0 °C) and then press enter

.

LL (Low Limit) factory-setting: -55.0 °C

Setting the upper limit

• With the edit keys change the menu function from
“HL 0” to "HL 1" and then press enter .

• Using the cursor keys and the edit keys
set the upper limit (example: 250.0 °C) and then press enter

.

HL (High Limit) factory-setting: 355.0 °C

Note:

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

LC4 F

35

7. Troubleshooting guide / Error messages

Whenever the microprocessor electronics registers a failure, a
complete shutdown of the heating device connected to the
controller is performed.

• The message relates to the cause in the working area or in
the safety area.

• The blinking numerals show the alarm message.

• A continuous alarm signal is sounded simultaneously in the

safety area.

• The wires of the working temperature sensor are interrupted or
short-circuited.

⎫
⎬ other errors
⎭

After eliminating the malfunction, press the mains power switch
off and on again to cancel the alarm state.
If the error reappears, contact an authorized JULABO service
station.

If necessary have the unit checked by a JULABO service
technician.

Mains fuses

• The mains fuses on the rear of the unit may easily be
exchanged as shown on the left.
(Fine fuse T 10.0 A, dia. 5 x 20 mm)

Warning:

Before exchanging the fuses, turn off the mains power switch and disconnect
the power plug from the mains socket!
Use only fine fuses with the specified nominal value.

Electrical connections

36

8. Electrical connections

Notice:

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

SF + AF

4

1

3

2

1

4

2

3

Shield Plug

Look on

solderin g side.

Pt100

Connectors for temperature sensors(11 + 12)
Pin assignment:
Pin 1 Current +

Pin 2 Voltage +
Pin 3 Voltage ­Pin 4 Current -

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

9

6

5

1

RS232C serial interface (13)

This port can be used to connect a computer with an RS232C
cable for remote control of the controller.

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!

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

LC4 F

37

/ ALARM - connector

The " ALARM" connector may be used as output for alarm

messages.

13

2

4

5

Circuit: Operation = relay powered
Alarm = relay not powered
Pin assignment:
Pin 1: +24 V (max. current 25 mA)
Pin 2: 0 V
Pin 3: 0 V / alarm relay
Pin 4: Reserved - do not use!
Pin 5: Cooling pulse

Grounded mains socket (16)

Connector for heating device

• Maximum 1000 W resistive load at 115 V.
Maximum current 5 A.

• Maximum 2000 W resistive load at 230 V.
Maximum current 10 A.

1

2

3

4

5

6

REG/EPROG

Programmer input /
Temperatur recorder output (14)

Pin Signal
1 Output: temperature sensor 4 ... 20 mA (1
or 0 ... 20 mA (2
2 Reserved - do not use!
3 Gnd for output 0 mA
4 Programmer - input 4 ... 20 mA (1
or 0 ... 10 V (3
5 Reserved - do not use!
6 Gnd for programmer - input 0 mA/V

(1

Factory-setting

(2

Setting via S6 two-way switch in unit!

(3

Setting via S1/S2 two-way switches in unit!

Also see chapter

6.4. Programmer input scale - EPH / EPL -

Electrical connections

38

Caution:

Improper maintenance or repair can result in electric shock or damage to the
unit.

Service and repair work may be performed only by authorized electricians.
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.

Changing hardware settings:

• Switch off the mains power switch and pull out the mains
plug.

• Remove the side screws as shown and move the hood to
the front.

• Programmer input Pin 4:
Push S1 / S2 two-way switch in the direction of the arrow.

• Temperature recorder output Pin 1:
Push S6 two-way switch in the direction of the arrow.

LC4 F

39

9. Remote control

9.1. 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).

If the controller is put into remote control mode via the
configuration level, the display will read "r OFF" = REMOTE
STOP. The controller is now operated via the computer.

In general, the computer (master) sends commands to the
controller (slave). The controller sends data (including error
messages) only when the computer asks for it.

A transfer sequence consists of:

• 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 and out commands.

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

The out commands are valid only in remote control
mode.

Examples:

• Command to set the working temperature to 55.5 °C:
out_sp_00 ⇔ 55.5↵

• Command to ask for the working temperature:
in_sp_00↵

• Response from the controller:

55.5↵

Remote control

40

9.2. List of commands

Command Parameter Description
version none Number of software version (V X.xx)

status none Status message, error message (see page 40)
out_mode_05 0 Stop the controller = r OFF
out_mode_05 1 Start the controller
out_sp_00 xxx.x Set working temperature
in_sp_00 none Ask for working temperature
in_pv_00 none Ask for effective value registered by working sensor
in_pv_01 none Ask for effective heater capacity
out_par_00 xxx.x Set the parameter Xp
in_par_00 none Ask for parameter Xp
out_par_01 xxx.x Set the parameter Tn
in_par_01 none Ask for parameter Tn
out_par_02 xxxx.x Set the parameter Tv
in_par_02 none Ask for parameter Tv

9.3. Status messages

Status messages Description

00 MANUAL STOP Controller in "OFF" state
01 MANUAL START Controller in keypad control mode
02 REMOTE STOP Controller in "r OFF" state
03 REMOTE START Controller in remote control mode

LC4 F

41

9.4. Error messages

Error messages Description

-03 EXCESS TEMPERATURE WARNING High temperature warning "HL".

-04 LOW TEMPERATURE WARNING Low temperature warning "LL".

-05 TEMPERATURE MEASUREMENT
ALARM

Error in measuring system.

-07 I2C-BUS WRITE ERROR

-07 I2C-BUS READ ERROR

-07 I2C-BUS READ/WRITE ERROR

Internal errors

-08 INVALID COMMAND Invalid command

-09 COMMAND NOT ALLOWED IN
CURRENT OPERATING MODE

Invalid command in current operating mode

-10 VALUE TOO SMALL Entered value too small

-11 VALUE TOO LARGE Entered value too large

-12 VALUE NOT VALID

Value not valid

Cleaning / repairing the unit

42

10. Cleaning / repairing the unit

Caution:

Improper maintenance or repair can result in electric shock or damage to the
unit.

¾ Repairs and any other work are to be carried out only by qualified service

personnel authorized by JULABO.

¾ 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.

¾ Prevent humidity from entering into the unit.

Cleaning:

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

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

Repairs:

Before asking for a service technician or returning a JULABO
instrument for repair, please contact an authorized JULABO
service station.

Returning a unit:

When returning the unit:

• Clean the unit and, if necessary, decontaminate the unit in
order to avoid endangering service personnel.

• Attach a short fault description.

• During transport the unit has to stand upright. Mark the packing

correspondingly.

• When returning a unit, take care of careful and adequate
packing.

• JULABO is not responsible for damages that might occur from
insufficient packing.

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