Bruker EPR 12T Cryogen Free User manual

Version
Innovation with Integrity
EPR 12T
Cryogen Free
01
User Manual
EPR Spectroscopy

Copyright © by Bruker Corporation
All rights reserved. No part of this publication may be
reproduced, stored in a retrieval system, or transmitted, in
any form, or by any means without the prior consent of the
publisher. Product names used are trademarks or
registered trademarks of their respective holders.
This manual was written by
Renate Petry
© August 13, 2014: Bruker Corporation
Faellanden, Switzerland
ZTKS0213 / Z31939 / Rev.: 01
For further technical assistance on the EPR 12T
Cryogen Free Cryogen Free magnet system, please do
not hesitate to contact your nearest BRUKER dealer or
contact us directly at:
BRUKER BioSpin GmbH
Silberstreifen 4
D–76287 Rheinstetten
Germany
Phone: + 49 721 5161 0
FAX: + 49 721 5171 01
E-mail: [e-mail]
Internet: www.bruker.com

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ZTKS0213 / Z31939 / Rev.: 01
Contents
Contact ...........................................................................................................5
1 Introduction....................................................................................................7
1.1 General Information.................................................................................................. 7
1.2 Limitation of Liability ................................................................................................. 7
1.3 Warranty................................................................................................................... 7
1.4 Copyright .................................................................................................................. 7
1.5 Customer Service..................................................................................................... 8
1.6 General View............................................................................................................ 8
2 Safety..............................................................................................................9
2.1 Approved Persons.................................................................................................... 9
2.2 Customer Responsibilities...................................................................................... 10
2.3 Symbols and Convention ....................................................................................... 11
2.4 Persons .................................................................................................................. 12
2.5 Intended Use .......................................................................................................... 12
2.6 Residual Risks........................................................................................................ 13
2.7 Signs and Labels.................................................................................................... 17
2.8 Safety Devices ....................................................................................................... 19
2.9 Behavior During Dangerous and Emergency Situations ........................................ 20
2.10 Fire Department Notification................................................................................... 20
3 Transportation .............................................................................................21
3.1 Safety ..................................................................................................................... 21
3.2 Packaging............................................................................................................... 22
3.3 Transportation Inspection....................................................................................... 22
3.4 Transportation by Forklift / Pallet Jack ................................................................... 23
3.5 Storage................................................................................................................... 24
4 Assembling ..................................................................................................25
5 Operation......................................................................................................27
5.1 Safety ..................................................................................................................... 27
5.2 Evacuating the Cryostat ......................................................................................... 28
5.2.1 General View..................................................................................................... 28
5.2.2 Mounting the Vacuum Valve at the Evacuated Cryostat................................... 29
5.2.3 Rebuilding Vacuum ........................................................................................... 31
5.2.4 Removing the Vacuum Valve ............................................................................ 32
5.3 Bruker Cryogen Free Controller (BCFC) ................................................................ 33
5.4 Power Supply ......................................................................................................... 36
5.4.1 Description ........................................................................................................ 36
5.4.2 First Steps ......................................................................................................... 37

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Contents
5.5 Cooling Down ......................................................................................................... 39
5.6 Operation of the BCFC ........................................................................................... 40
5.6.1 Compressor Status Check ................................................................................ 40
5.6.2 Emergency Button Test..................................................................................... 41
5.6.3 Energizing the Magnet ...................................................................................... 42
5.6.4 Emergency Quench........................................................................................... 43
5.6.5 Warming up the Magnet .................................................................................... 44
5.7 Power Supply Operation......................................................................................... 45
5.7.1 Selecting the Operation Mode........................................................................... 45
5.7.2 Energizing and Deenergizing in Main Mode...................................................... 45
5.7.3 Energizing and Deenergizing in Sweep Mode .................................................. 47
6 Troubleshooting ..........................................................................................49
6.1 Safety ..................................................................................................................... 49
6.2 Problems ................................................................................................................ 50
6.3 Solutions................................................................................................................. 51
7 Maintenance.................................................................................................53
8 Disassembling .............................................................................................55
A Appendix ......................................................................................................57
A.1 Warning Signs ........................................................................................................ 57
A.2 Figures.................................................................................................................... 59
A.3 Tables..................................................................................................................... 61
A.4 Glossary / Abbreviations......................................................................................... 63
A.5 Technical Data........................................................................................................ 65
A.5.1 Components ...................................................................................................... 65
A.5.2 Dimensions........................................................................................................ 65
A.5.3 Cryostat Dimensions ......................................................................................... 66
A.5.4 Specifications .................................................................................................... 68
A.5.5 Power Supply Parameters................................................................................. 71
A.5.6 Base Temperature Report (Monthly)................................................................. 74
A.5.7 Other Applicable Documentation....................................................................... 76
A.6 Index....................................................................................................................... 77

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ZTKS0213 / Z31939 / Rev.: 01
Contact
Manufacturer
Bruker BioSpin GmbH
Silberstreifen 4
D-76287 Rheinstetten
Germany
Phone: [phone]
Fax: [phone]
Email: [e-mail]
http://www.bruker.com
Please refer to the model no., serial no. and internal order no. in all correspondence
regarding the EPR magnet system or components thereof.

6ZTKS0213 / Z31939 / Rev.: 01
Contact

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ZTKS0213 / Z31939 / Rev.: 01
1 Introduction
1.1 General Information
This manual contains important information about the handling of the magnet system.
The compliance with all safety and handling instructions and the applicable local
accident prevention and general safety regulations is necessary for safe work.
This manual is part of the product. It must be kept in the vicinity of the magnet system
and unimpeded access must be ensured at any time.
Read this manual carefully before operating the magnet system.
1.2 Limitation of Liability
The information in this manual will take into account the current state of technology.
The manufacturer assumes no liability for damages resulting from:
• non-compliance with the instructions and all applicable documentation,
• use for purposes not intended,
• not sufficiently approved persons,
• arbitrary changes or modifications and
• use of unauthorized spare parts or accessories.
1.3 Warranty
The warranty terms can be found in the sales documents of the magnet system and in
the Terms and Conditions.
1.4 Copyright
No part of this publication may be reproduced, stored in a retrieval system, or trans-
mitted in any form, or by any means without the prior consent of the publisher. Product
names used are trademarks or registered trademarks of their respective holders.

8ZTKS0213 / Z31939 / Rev.: 01
Introduction
1.5 Customer Service
Technical support is provided by our customer service via telephone or e-mail. For
contact information see page 5 of this document.
1.6 General View
Figure 1.1: Overview of the EPR magnet system
(1) EPR 12T Cryogen Free
Magnet System
(2) Bruker Cryogen Free
Controller (BCFC)
(3) Power Supply E700-1083
(4) Cryogenic refrigerator
(consisting of cryocooler,
compressor and flex lines).

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2 Safety
The supplied cryostat of the magnet system was designed and manufactured according
best available technical knowledge and practice, archived in over 50 years of experience
of Bruker Corporation. International standards for quality and approval recommended for
cryostats of superconducting magnets were certified.
Nevertheless non-compliance with the following instructions and safety advice may
cause serious hazards and property damage.
2.1 Approved Persons
Bruker BioSpin AG identifies the following qualifications for personnel performing tasks
on the magnet system or its components:
Approved Customer Personnel
As a result of professional training by Bruker Service Personnel, experience and
knowledge of applicable regulations these persons are qualified to perform the specific
tasks on the magnet system and its components assigned to them in this manual.
Approved Customer Personnel are qualified to identify possible hazards and risks
associated with the tasks assigned to them and to perform all possible steps to eliminate
or minimize these risks.
Bruker Service Personnel
These persons are qualified by appropriate qualification and professional training and
experience (including all necessary knowledge of applicable regulations and regulatory
requirements) to perform specific tasks on the magnet system and its components.
Bruker Service Personnel are qualified to identify possible hazards and risks and to
perform all possible steps to eliminate or minimize these risks.

10 ZTKS0213 / Z31939 / Rev.: 01
Safety
2.2 Customer Responsibilities
The customer must obey the security advice and the rules for safety, accident prevention
and environmental protection valid for magnet systems. Furthermore, the customer is
responsible for keeping the magnet system in correct technical condition.
In particular:
• The customer must identify additional dangers resulting from the working conditions
at the site of the magnet system and implement applicable safety measures.
• The customer must ensure that the site plan meets the specified conditions for
operating the magnet system.
• The customer must clearly mark the danger area around the magnet system and
install the corresponding instruction plates.
• The customer has to inform the local fire brigade about the special risks of the
magnet system.
• The customer must clearly define the responsibilities for operation and
maintenance.
• The customer must ensure that all employees working with the magnet system have
read and understood the manual.
• The customer has to consider the specific conditions of operation of this cryogen
free cryostat equipped with a cryogenic refrigerator. The customer is responsible for
obeying the advice given in this manual. In case the cryogenic refrigerator is not
running correctly he must immediately react following the advice given in this
manual.
• The customer has to instruct his employees at regular intervals on hazards and
safety measures.
• The customer has to instruct other persons not working on the magnet system but
carrying out work in the same room, for instance cleaning staff.
• The customer must ensure that maintenance is performed according to the
schedule listed in section "Maintenance" on page 53.

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Safety
2.3 Symbols and Convention
Safety instructions in this manual are marked with symbols. The safety instructions are
introduced using indicative words which express the extent of the hazard.
In order to avoid accidents, personal injury or damage to property, always observe safety
instructions and proceed with care.
DANGER
This combination of symbol and signal word indicates an immediately hazardous
situation which could result in death or serious injury unless avoided.
WARNING
This combination of symbol and signal word indicates a potentially hazardous
situation which could result in death or serious injury unless avoided.
CAUTION
This combination of symbol and signal word indicates a possibly hazardous situation
which could result in minor or slight injury unless avoided.
SAFETY INSTRUCTIONS
This combination of color and signal words are used for control flow and shutdowns
in the event of an error or emergency.
NOTICE
This combination of color and signal word indicates a possibly hazardous situation
which could result in damage to property or the environment unless avoided.
This symbol highlights useful tips and recommendations as well as information
designed to ensure efficient and smooth operation.

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Safety
2.4 Persons
2.5 Intended Use
The magnet system is exclusively designed and constructed for a magnet field of up to
12.0 T for EPR measurements.
WARNING
Risk of injury and property damage due to handling by not approved
persons.
Incorrect handling of the magnet system by not approved persons may result in
significant bodily injury and property damage.
Thus:
• Work must only be carried out by approved persons with applicable qualifications.
The necessary qualifications are specified at the beginning of the relevant
chapters.
• In case of doubt contact Bruker Service. Contact information see page 5 of this
document.
WARNING
Risk of damage to life and limb by incorrect use of the magnet system.
Incorrect use of the magnet system can lead to life-threatening situations and
destruction of the magnet system.
Thus:
• Only use the magnet system as intended.
• Do not change the magnet system.
• Do not exceed specified values for the movement and for the operation of the
magnet system.
• It is prohibited to energize the magnet above 12 T.
Damage claims from damages caused by other than the intended use of the magnet
system are excluded and the customer is held liable.

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Safety
2.6 Residual Risks
In the following section, the residual risks from the risk analysis are summarized.
To prevent health hazards and hazardous situations obey all safety instructions and
warnings in the manual.
Electricity
Magnetic Field
WARNING
Risk of damage to life and limb due to electricity.
Risk of damage to life and limb due to contact with electrical lines and damaged
insulation.
Thus:
• Work on electrical equipment must be done by an approved electrical technician.
• Keep moisture away from electrical lines to prevent short-circuits.
• Check the magnet system accidental ground before start up.
WARNING
Risk of damage to life and limb due to high magnetic fields.
A magnetic field of more than 0.5 mT (5 Gauss) is life-threatening for people with
pacemakers or metal implants. Ferromagnetic tools in the magnetic field are
significantly hazardous. Disks and electronic devices may be damaged. Duration of
exposure (8 h/day) above the limit of 200 mT can cause damage to health.
Thus:
• Do not use ferromagnetic tools or items within the identified area.
• Mark the magnetic field of more than 0.5 mT (5 Gauss) before start up.
• The workplace must be outside the 0.5 mT area.
• Only use safety shoes with non-ferromagnetic toe caps.
• Keep people with pacemakers and metal implants away from the identified area.
• Keep disks, credit cards and electronic devices away from the identified area.
• Only use transport dewars of non-ferromagnetic material for the cryogenic agents.
• Only use non-ferromagnetic ladders or steps.

14 ZTKS0213 / Z31939 / Rev.: 01
Safety
Assembly/Disassembly
Inserting and Removing the VTI
CAUTION
Risk of injury and property damage due to incorrect
assembly / disassembly of the cryogenic refrigerator.
Assembly / disassembly requires approved persons with sufficient experience.
Mistakes during assembly / disassembly of the cryogenic refrigerator may result in
property damage.
Thus:
• Flexible gas lines (supply and return) must be connected/disconnected only when
the magnet system is warmed up.
• Inspect the flexible gas lines and pay regard to visible damage.
• Respect detailed instructions on assembling / disassembling given in the manual
of the cryogenic refrigerator.
WARNING
Risk of damage to live and limb during inserting and removing the VTI
and/or the sample holder.
Metallic items in close vicinity of the magnet system get attracted from strong
magnetic forces during a magnet quench.
Thus:
• Insert or remove the VTI and/or the sample holder only at zero field.
• Only use VTIs and/or sample holders approved by Bruker Service.

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Safety
Gas under Pressure
Risk of Tilting
Heavy Weights
WARNING
Risk of injury due to gas under pressure inside the cryostat and further
equipment.
Manipulations of components with gas under pressure may lead to injury and
property damage.
Thus:
• Keep the Cryogenic Refrigerator circuit closed at any time. Overpressure can be
released via the safety valve of the compressor, of the rotary valve and of the cold
head.
WARNING
Risk of injury due to tilting of the magnet system.
The magnet is sensitive to lateral forces. It may tilt.
Thus:
• Do not climb onto the magnet system.
• Do not lean items against the magnet system.
• Do not lean against the magnet system.
• Do not move the magnet system on your own.
WARNING
Risk of damage to life and limb caused from moving heavy weights.
Lifting heavy weights is life-threatening due to falling or moving parts.
Thus:
• Do not stay or work under lifted boxes.
• All used lifting equipment must be approved to carry the weight (see Technical
Data on page 65).
• Do not use damaged lifting equipment.
• Do not use lifting equipment without updated check tag.
• Lifting only with approved qualification.
• Obey ergonomic guidelines while lifting heavy parts.
• Protect parts against falling.

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Safety
Transportation
CAUTION
Risk of injury and property damage due to incorrect transportation.
The box may tilt, movement may get out of control. Thus persons may get injured
and the cryostat or further equipment may be damaged.
Thus:
• Be careful while unloading and moving the boxes.
• Do not move the boxes arbitrarily.
• Pay attention to all symbols on the boxes.
• Pay attention to sharp edges and spikes of boxes and parts by using protective
gloves while moving.
• Move the boxes in an upright position.
• Do not tilt the boxes.
• Prevent crossing thresholds, even if they are only a few millimeters high.
• Clean the transportation way before moving the boxes.
• Unpack shortly before assembling.
• The cryostat or further equipment must be protected from rain and other bad
weather conditions during transportation.
• Exclusively move the cryostat in its original box.
• Do not remove the tightening straps inside the box until assembling.
• Only use the provided attachment points.
• Ensure that the cryostat is always carefully leveled, even if it is hanging on the
crane.
• Do not move the evacuated cryostat.
• Do not move the cryostat after cool down.

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Safety
2.7 Signs and Labels
Signs and labels are always related to their immediate vicinity. The following signs and
labels are found on the magnet system and in the vicinity:
Prohibition sign: No person with pacemakers!
People with pacemakers are endangered in the identified area of 0.5 mT (5 Gauss) and
are not allowed to enter these areas.
Prohibition sign: No person with implants!
People with metallic implants are endangered in the identified area of 0.5 mT (5 Gauss)
and are not allowed to enter these areas.
Prohibition sign: No watches or electronic devices!
Watches and electronic devices may be damaged in the identified area of 0.5 mT
(5 Gauss).
Prohibition sign: No credit cards or other magnetic memory!
Credit cards and magnetic memory may be damaged in the identified area of 0.5 mT
(5 Gauss).
Prohibition sign: Do not touch! Do not block!
Do not touch or block the identified area.
WARNING
Risk of damage to persons and property due to not readable signs and
labels.
Signs and labels with advice may become not readable.
Thus:
• Maintain labels and signs in a readable state.
• Replace damaged or not readable signs and labels immediately. New signs and
labels can be obtained from Bruker Service.

18 ZTKS0213 / Z31939 / Rev.: 01
Safety
Hazard warning sign: Strong magnetic field!
• No magnetic storage devices.
• No jewelry.
• No metallic items.
Emergency exit!
• Always keep the emergency exit clear.
• Follow the arrows if necessary.
• Emergency exit doors must open in direction of escape.

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Safety
2.8 Safety Devices
Emergency Quench
In case of emergency it may be necessary to quench the magnet and to stop the
hazardous magnetic fringe field. The quench can be executed via an emergency button
("Magnet Quench") on the front panel of the BCFC. For detailed information see "Emer-
gency Quench and Status Indicators" on page 34.
Drop-off Plate
A drop-off plate is a safety device of the room temperature vessel. If the vacuum breaks,
the drop-off plate will open. In case of an accidental overpressure in the vessel the
drop-off plate will release the pressure smoothly.
Power Supply
The security of the system and of the operator depend on safety devices integrated in
the power supply which must be kept connected to the magnet system.
WARNING
Risk of damage to life and limb due to not sufficient safety devices.
Several safety devices and safety valves ensure safe operation. They must always
be in correct working condition.
Thus:
• Do not block safety devices.
• Check the operational reliability of the safety devices before working on the
magnet system.
• Do not remove safety devices from the magnet system.
• Do not disconnect the power supply or the thyristor during operation of the
magnet system.
For more information about the safety devices of the cryogenic refrigerator refer to the
supplied manual

20 ZTKS0213 / Z31939 / Rev.: 01
Safety
2.9 Behavior During Dangerous and Emergency Situations
Preparations
• Keep the emergency exits free at any time.
• Prepare and maintain an up-to-date list of emergency telephone numbers in the
magnet system area.
In Case of Emergency
• Leave the danger zone immediately.
• Rescue persons from the danger zone.
• Start first aid immediately.
• Call the responsible contact.
• Call for medical assistance.
• Call the fire department.
2.10 Fire Department Notification
• Inform the fire department about the potential risks of a magnet system, i.e. danger
of ferromagnetic rescue equipment close to the magnet system.
• Laboratory windows which are accessible during an emergency should be clearly
identified with warning signs, visible from the outside.