Julabo Pura 4 Installation instructions

Water baths
Original operating manual
1.950.6080.us.V03 02/2022

2
Legal
JULABO USA, Inc.
884 Marcon Boulevard
Allentown, PA 18109
Phone: [phone]
Fax.: [phone]
[e-mail]
www.julabo.us
The content of this operating manual is protected by copyright. Information,
including texts, images, and other contents may not be reproduced, distributed,
transmitted, stored or otherwise used in any form without prior explicit written
consent.
Illustrations in this operating manual are for illustrative purposes and are not
necessarily displayed to scale.

3
Contents
1Foreword ............................................................................................. 5
2About this manual .............................................................................. 6
2.1 Accessories ..................................................................................... 6
2.2 Warnings ......................................................................................... 6
2.3 Symbols used .................................................................................. 7
3Intended use ....................................................................................... 8
4Safety ................................................................................................... 9
4.1 General Safety Instructions for the operating company.................. 9
4.2 General Safety Instructions for the operator ................................... 9
4.3 Safety symbols .............................................................................. 10
4.4 Safety function............................................................................... 10
5Product description.......................................................................... 11
5.1 Operating and functional elements ............................................... 11
5.1.1 Status LEDs ............................................................................. 12
5.1.2 Key description......................................................................... 13
5.2 Alarm messages............................................................................ 13
5.3 Technical data ............................................................................... 14
6Transport and installation ............................................................... 16
6.1 Transporting the device................................................................. 16
6.2 Install the device at the operating location .................................... 16
7Initial operation................................................................................. 17
7.1 Connect the device to the power supply ....................................... 17
7.2 Required water quality................................................................... 17
7.3 Filling the water bath ..................................................................... 18
8Operation........................................................................................... 19
8.1 Switch on the unit .......................................................................... 19
8.2 Switch off the unit .......................................................................... 19
8.3 Start temperature control application ............................................ 19
8.4 Setting the timer ............................................................................ 21
8.5 Stopping the timer ......................................................................... 21
8.6 Emptying the water bath................................................................ 22

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9Maintenance ...................................................................................... 24
9.1 Replace detachable power cord.................................................... 24
9.2 Check safety symbols.................................................................... 24
9.3 Clean device.................................................................................. 24
9.4 Device storage............................................................................... 25
9.5 Technical Service .......................................................................... 26
9.6 Warranty ........................................................................................ 26
10 Disposal............................................................................................. 29
10.1 Device disposal ............................................................................. 29
11 Appendix ........................................................................................... 30
11.1 Alarms and Warnings .................................................................... 30

Foreword
5
1 Foreword
Congratulations!
You have made an excellent choice.
JULABO would like to thank you for the trust you have placed in our company
and products.
This operating manual will help you become acquainted with the use of our
units. Read the operating manual carefully. Keep the operating manual handy at
all times.

About this manual
6
2 About this manual
This manual is intended for the equipment specified on the cover page.
NOTE
Observe the safety instructions!
Read the Safety section of this manual before using the equipment for the
first time.
2.1 Accessories
JULABO offers a wide range of accessories for the devices. Accessories are not
described in this manual.
The complete range of accessories for the devices described in this manual can
be found on our website www.julabo.com. Use the Search function on the
website.
2.2 Warnings
The manual contains warnings to increase safety when using the device.
Warnings must always be observed.
A warning sign displayed in signal color precedes the signal word. The signal
word, highlighted in color, specifies the severity of the hazard.
CAUTION
This signal word designates a danger with a low level of risk which, if it not
prevented, may result in minor to moderate injuries.
WARNING
This signal word designates a danger with a medium level of risk which, if it
not prevented, may result in death or serious injuries.

About this manual
7
DANGER
This signal word designates a danger with a high level of risk which, if it not
prevented, will result in death or serious injuries.
NOTE
This signal word designates a possibly harmful situation. If it is not avoided,
the system or objects in its vicinity may be damaged.
2.3 Symbols used
Various symbols are used throughout this manual to aid reading
comprehension. This list describes the symbols used.
Tools needed for the following approach
Prerequisite to be met for the following procedure
1. Numbered action steps
Interim result for individual action steps
Additional note for individual action steps
Final result of a procedure
<> Terms in angle brackets denote control menu
[] Terms in square brackets denote keys, softkeys and buttons

Intended use
8
3 Intended use
This section defines the purpose of the unit so that the operator can operate the
unit safely and avoid misuse.
JULABO water baths are intended for controlling the temperature of water.
Samples in suitable vessels can be temperature-controlled in the water bath.
These devices are not suitable for direct temperature control applications for
food, other consumables, or pharmaceutical or other medical products.
Do not use bath fluids other than water, as this is not in accordance with the
device's intended use.
These devices are not suitable for use in explosive environments.
These devices are not intended for use in living areas. They may cause
interference with radio reception.

Safety
9
4 Safety
4.1 General Safety Instructions for the operating company
This section outlines the General Safety Instructions that must be observed by
the operator to ensure safe operation.
•The operator is responsible for the qualifications of its operating personnel.
•The operator must ensure that the operating personnel has been instructed
in use of the device.
•The device operators must receive regular training about the dangers
involved in their work and measures to prevent such dangers.
•The operator must ensure that persons entrusted with the operation,
installation and maintenance have read and understood the operating
manual.
•The device may only be configured, installed, maintained and repaired by
trained personnel with appropriate qualifications.
•If hazardous substances or substances that may become hazardous are
used, the device may only be used by personnel who are qualified to handle
these substances and the device.
•The operator must ensure that the device is checked for safety and
functionality at regular and usage-related intervals.
•The operator must ensure that the mains supply has a low impedance to
prevent influencing other devices powered by the same supply.
4.2 General Safety Instructions for the operator
This section outlines the General Safety Instructions that must be observed by
the user to ensure safe operation.
•Read the operating manual before initial operation
•The device may only be connected to mains power supply outlets with a
protective earth (PE)
•The mains plug is a safe insulator from the power supply grid and must be
freely accessible at all times
•Do not start the device if it has a damaged power cable
•Do not operated damaged devices
•Observe the safety symbols on the device
•Do not remove safety symbols
•Have all service and repair work carried out by authorized specialists only
•Protect device from dirt
•Protect device direct UV radiation

Safety
10
4.3 Safety symbols
There are safety symbols included with the device, which should be attached to
the device before initial operation.
Safety
symbols
Description
Warning of a danger zone. Note operating manual
Warning about hot surface
Read operating manual before switching on
4.4 Safety function
Technical protective devices provide for safe operation. If a safety function is
triggered, the operator is alerted with a message on the display and an acoustic
signal.
Overheating protection
•Overheating protection triggers at 130°C and switches off the heating
element This prevents overheating. A continuous signal tone sounds. Am
error message appears on the display. A restart is required.
Dry-running protection
•Dry-running protection switches off the heating element automatically if
there is too little bath fluid in the bath This prevents overheating. A
continuous signal tone sounds. Am error message appears on the display. A
restart is required.
Produc t desc ri pti on

Product description
11
5 Product description
5.1 Operating and functional elements
The following figure shows the operating and functional elements and their
position on the unit.
Control and function elements
1 Drain screw (not for PURA 4)
2 Stainless steel bath tank
3 Keypad with display
4 Recessed grip, both sides (not for PURA 4)
5 Mains switch
6 Mains connection

Product description
12
5.1.1 Status LEDs
Status LEDs below the LED display show different operating states and settings.
Status LEDs
1
Heating
2 Warning symbol
3 Timer
4 Duration hour/minute
5 Temperature unit °F
6 Temperature unit °C

Product description
13
5.1.2 Key description
The device is operated using the key panel. This is used to control all menu
functions and make entries.
Key Function
The [OK] key is used to start a temperature control
application or to stop a running temperature control
application.
Press [OK] to enable a selected function, open a menu
option, or confirm a set value.
Use the arrow keys to select a function or set a value. Short
press for single steps, press and hold for fast counting.
The timer is operated with the [MENU] key.
5.2 Alarm messages
Alarms and warnings are indicated on the display using error codes. Important
error code descriptions can be found in the appendix. If you are unable to rectify
a fault, contact Technical Service.
Alarm:
In the event of an alarm, the control LED lights up. The temperature control is
stopped. At the same time, a continuous acoustic signal sounds and an error
code is shown on the display. The acoustic signal can be deactivated by pressing
the [OK] key. The fault causing the alarm must be remedied. A restart is
required.
Warning:
In the event of a warning, the temperature control application is not interrupted.
A signal tone is emitted at intervals. The display alternates between the actual
temperature and the error code. The acoustic signal can be deactivated by
pressing the [OK] key. If the underlying cause of the warning is remedied, the
signal tone ceases. Depending on the cause, warnings may cease automatically
after a period of time, e.g. when the device cools down.

Product description
14
5.3 Technical data
Temperature stability measured in accordance with DIN 12876 with water at
70°C. Performance specifications apply at an ambient temperature of 20°C.
Grouping of the device acc. to CISPR 11:
•The device is an ISM device of group 1, which uses high frequency for
internal purposes
•Class A: Use in an industrial electromagnetic environment
In accordance with IEC 61010-1, the device is designed for safe operation under
the following ambient conditions:
•Indoor use
•Altitude up to 2000 m above sea level
• Ambient temperature +5 … +40°C
•Maximum relative humidity 80% for temperatures up to 31°C, decreasing
linearly down to 50% relative humidity at 40°C
•Mains voltage fluctuations up to ±10% of the nominal voltage permissible
if not otherwise specified
•Contamination level 2
Classified in accordance with DIN 12876-1:
•Class I
Protection class according to EN 60 529:
•Protection class IP21
Technical data PURA 4/10/14/22/30
Working temperature range* °C +18 … +99.9
Overheating protection, fixed
setting
°C 130
Temperature stability** °C ±0.15
Temperature resolution °C 0.1
Temperature setting Digital
Temperature control PID1
Display LED
Bath tank, basic material Stainless steel
*with counter-cooling and bath cover (accessories)
* with bath cover (accessory)

Product description
15
PURA 4 PURA 10
Dimensions (W x D x H) cm 21 x 35 x 22 31 x 35 x 22
Bath opening (W x L) cm 12 x 27 22 x 27
Bath depth cm 14 14
Fill weight (min ... max) l 0.8 ... 4.5 1.4 ... 9.5
Weight kg 4.9 7.0
Mains connection V
Hz
230
50/60
100-115
50/60
230
50/60
100-115
50/60
Current consumption A 3 4/5 6 10/11
Heating capacity kW 0.5 0.38 ... 0.5 1.2 0.9 ... 1.2
PURA 14 PURA 22
Dimensions (W x D x H) cm 42 x 35 x 22 64 x 35 x 26
Bath opening (W x L) cm 33 x 27 55 x 27
Bath depth cm 14 18
Fill weight (min ... max) l 2.0 ... 14.0 3.4 ... 25.5
Weight kg 8.5 11.5
Mains connection V
Hz
230
50/60
100-115
50/60
230
50/60
100-115
50/60
Current consumption A 8 10/12 9 10/12
Heating capacity kW 1.8 0.98 ... 1.3 2 0.98 ... 1.3
PURA 30
Dimensions (W x D x H) cm 86 x 35 x 26
Bath opening (W x L) cm 77 x 27
Bath depth cm 18
Fill weight (min ... max) l 4.8 ... 36.0
Weight kg 14.5
Mains connection V
Hz
230
50/60
100-115
50/60
Current consumption
A
9
10/115
Heating capacity kW 2.0 0.98 ... 1.3

Transport and installation
16
6 Transport and installation
This section describes how to transport the unit safely.
6.1 Transporting the device
This section describes how to transport the device safely.
CAUTION
Risk of crushing by falling device!
A device that is not secured appropriately can fall down during improper
transport and cause crushing injuries.
•Secure the device against tipping and falling during transport
•Secure loose parts against falling during transport
•Transport the device upright and with a suitable means of transport
•Wear personal protective equipment
The device is switched off and emptied.
A suitable transport trolley is available.
1. Disconnect the mains cable from the device.
2. Lift the device by the recessed grips (PURA 4: on housing) and place it in the
center of the transport trolley.
See the technical data for weight information.
3. Place loose parts for the device, such as cables, on the transport trolley.
The device is then ready for transport and can be safely transported to its
installation location.
6.2 Install the device at the operating location
This section describes how the device is set up at the installation location.
The device has been transported to the operation location.
The size and infrastructure of the operation location are suitable for device
operation.
1. Place the device on a level, smooth, non-flammable surface.
Recommended minimum distance of 1 m to other devices, to prevent
electromagnetic interference.
The device is set up at the operation location.

Initial operation
17
7 Initial operation
7.1 Connect the device to the power supply
This section describes how to connect the device electrically using the mains
plug.
The device is at its installation location.
1. Insert the device power cable plug into the mains connection socket on the
rear of the device.
2. Insert the mains cable plug into the power supply socket.
The device is connected to the electricity.
7.2 Required water quality
Only water is permitted as a bath fluid. Follow the specifications on water
quality to ensure long-term operation without issue.
NOTE
Risk of corrosion due to unauthorized bath fluid!
Unsuitable bath fluids not approved by JULABO can damage the device.
•Only water is permitted as a bath fluid
•JULABO recommends a water mixture of 70% softened/descaled water
and 30% tap water
•Consult JULABO before using a bath fluid other than what is
recommended
•Do not use water containing iron Corrosion also possible with stainless
steel.
•Do not use water containing chlorine Pitting corrosion possible.
•Do not use distilled or deionised water Corrosion also possible with
stainless steel.
•Do not use water containing calcium carbonate A high lime content leads to
limescale formation in the bath.

Initial operation
18
7.3 Filling the water bath
Note the fill level limits filling the water bath:
• Maximum fill level: 20 mm below edge of bath
• Minimum fill level: 10 mm above adjustable platform
Note the minimum mark on the adjustable platform.
The device is switched off.
1. Open the bath cover (accessory).
2. Place the samples in the bath.
3. Fill the bath with water.
Note the minimum fill level and the maximum fill level.
The water bath is filled.
B

Operation
19
8 Operation
8.1 Switch on the unit
This section describes how to switch on the device.
v
The device is connected and ready for operation.
1. Switch the device on at the mains switch.
The display shows OFF.
The device is switched on and ready for operation.
8.2 Switch off the unit
This section describes how to switch off the device.
The device is switched on.
1. Stop a running temperature control application.
2. Switch the device off at the mains switch.
The device is switched off.
8.3 Start temperature control application
You can start a temperature control application right on the device, or program
one using the timer.
CAUTION
Risk of burns from hot steam!
The temperature control process can generate very hot steam. Contact with
hot steam can cause burns.
• Do not bend over the open water bath during operation
• Wear protective gloves and glasses
• Allow the device to cool to room temperature before opening the bath
cover (accessory)

Operation
20
NOTE
Condensate forms from water vapor!
The formation of water vapor during operation can cause condensation to
build up in the immediate vicinity.
•Ensure sufficient distance between the water bath and adjacent
equipment
•When using the bath cover (accessory): Do not close vent holes
NOTE
Oxidation from insert racks or non-ferrous metal samples!
Insert racks or non-ferrous metal samples can cause electrochemical
oxidation and damage the bath tank.
•Do not use insert racks and samples made of non-ferrous metal
•Only use original JULABO insert racks
NOTE
Falling bath fluid level!
In the case of a prolonged temperature control application, the level of bath
fluid in the bath tank can fall below the alarm limit due to evaporation. A low
liquid level alarm is triggered and temperature control application stops.
•In the event of a prolonged temperature control application, regularly
check the fill level of bath fluid in the bath tank
•If the level is low, refill the bath fluid
The device is ready for use.
1. Switch the device on at the mains switch.
2. Press [OK].
The actual temperature is displayed.
3. Set the desired setpoint temperature using the arrow keys.
4. Press [MENU].
The setpoint temperature is saved. The display flashes briefly. The device
starts the temperature control application at once. An acoustic signal
sounds at 0.5°C before the setpoint temperature. The temperature control
application can be stopped with the [OK] key.
For temperature control applications near or below the ambient
temperature: Use a cooling coil or JULABO immersion cooler.