Retsch 50l User Manual
Manual
Dewar LN2 Autofill 50l
Translation
© Retsch GmbH, 42781 Haan, Retsch-Allee 1-5, Germany 08.02.2012 0002
Copyright
Copyright by
Retsch GmbH
Haan, Retsch-Allee 1-5
D-42781 Haan
Federal Republic of Germany
2
1 Notes on the Operating Manual ............................................................................................................ 5
1.1 Explanations of the safety warnings .................................................................................................. 6
1.2 General safety instructions ................................................................................................................ 7
1.3 Repairs ............................................................................................................................................... 8
2 Confirmation ........................................................................................................................................... 9
2.1 Type plate description ........................................................................................................................ 9
3 Safety and occupational health instructions ..................................................................................... 10
3.1 General ............................................................................................................................................ 11
3.2 Safety instructions on the handling of liquid nitrogen ...................................................................... 12
3.3 Oxygen deficiency ........................................................................................................................... 12
3.3.1 Dangers ....................................................................................................................................... 12
3.3.2 Causes ......................................................................................................................................... 12
3.3.3 Recommendations ....................................................................................................................... 12
3.3.4 General conduct in the case of an accident ................................................................................ 13
3.4 Cryogenic burns ............................................................................................................................... 13
3.4.1 Dangers ....................................................................................................................................... 13
3.4.2 Causes ......................................................................................................................................... 13
3.4.2.1 Burns through splashes ....................................................................................................... 13
3.4.2.2 Burns through contact .......................................................................................................... 14
3.4.3 Recommendations ....................................................................................................................... 14
3.4.4 General rules of conduct for splashes with liquid nitrogen .......................................................... 14
3.4.4.1 To the eyes .......................................................................................................................... 14
3.4.4.2 On the skin ........................................................................................................................... 14
3.5 Danger of explosion ......................................................................................................................... 14
3.5.1 Dangers ....................................................................................................................................... 14
3.5.2 Causes ......................................................................................................................................... 14
3.5.3 Recommendations ....................................................................................................................... 15
3.5.4 General conduct in the case of an accident ................................................................................ 15
3.6 Oxygen enrichment .......................................................................................................................... 15
3.6.1 Dangers ....................................................................................................................................... 15
3.6.2 Causes ......................................................................................................................................... 15
3.6.3 Recommendations ....................................................................................................................... 15
3.7 Surrounding area of the machine .................................................................................................... 16
3.7.1 Rooms .......................................................................................................................................... 16
4 Operating the machine ........................................................................................................................ 17
4.1 Views of the Instrument ................................................................................................................... 17
4.2 Overview table of the parts of the device ........................................................................................ 18
4.3 Technical Data ................................................................................................................................. 19
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4.4 Vacuum closure and safety device .................................................................................................. 19
4.5 Level Display ................................................................................................................................... 19
4.6 Filling the vessel .............................................................................................................................. 20
4.7 Pressure build-up ............................................................................................................................. 21
4.8 Withdrawal of liquid nitrogen............................................................................................................ 21
4.9 Pressure relief .................................................................................................................................. 21
4.10 Transport.......................................................................................................................................... 21
4.11 Admitting the test pressure .............................................................................................................. 22
4.12 Checking the seat tightness............................................................................................................. 22
4.13 Checking the response pressure ..................................................................................................... 22
5 Index ...................................................................................................................................................... 23
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Notes on the Operating Manual
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1 Notes on the Operating Manual
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This operating manual is a technical guide on how to operate the device safely and
it contains all the information required for the areas specified in the table of
contents. This technical documentation is a reference and instruction manual. The
individual chapters are complete in themselves.
Familiarity (of the respective target groups defined according to area) with the
relevant chapters is a precondition for the safe and appropriate use of the device.
This operating manual does not contain any repair instructions. If faults arise or
repairs are necessary, please contact your supplier or get in touch with Retsch
GmbH directly.
Application technology information relating to samples to be processed is not
included but can be read on the Internet on the respective device’s page at
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www.retsch.com.
Changes
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Subject to technical changes.
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Copyright
Disclosure or reproduction of this documentation, use and disclosure of its contents
are only permitted with the express permission of Retsch GmbH.
Infringements will result in damage compensation liability.
5
Notes on the Operating Manual
WARNING
Type of danger / personal injury
Source of danger
– Possible consequences if the dangers are not observed.
• Instructions on how the dangers are to be avoided.
WARNING
CAUTION
Type of danger / personal injury
Source of danger
– Possible consequences if the dangers are not observed.
• Instructions on how the dangers are to be avoided.
CAUTION
NOTICE
Nature of the property damage
Source of property damage
– Possible consequences if the instructions are not observed.
• Instructions on how the dangers are to be avoided.
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1.1 Explanations of the safety warnings
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In this Operating Manual we give you the following safety warnings
Serious injury may result from failing to heed these safety warnings. We give you
the following warnings and corresponding content.
We also use the following signal word box in the text or in the instructions on action
to be taken:
Moderate or mild injury may result from failing to heed these safety warnings.
We give you the following warnings and corresponding content.
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We also use the following signal word box in the text or in the instructions on action
to be taken:
In the event of possible property damage we inform you with the word
“Instructions” and the corresponding content.
We also use the following signal word in the text or in the instructions on action to
be taken:
NOTICE
6
Notes on the Operating Manual
CAUTION
Read the Operating Manual
Non-observance of these operating instructions
– The non-observance of these operating instructions can
result in personal injuries.
• Read the operating manual before using the device.
• We use the adjacent symbol to draw attention to the
necessity of knowing the contents of this operating
manual.
CAUTION
Changes to the machine
– Changes to the machine may lead to personal injury.
• Do not make any change to the machine and use spare parts and
accessories that have been approved by Retsch exclusively.
NOTICE
Changes to the machine
– The conformity declared by Retsch with the European Directives will lose
its validity.
– You lose all warranty claims.
• Do not make any change to the machine and use spare parts and
accessories that have been approved by Retsch exclusively.
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1.2 General safety instructions
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Target group : All persons concerned with the machine in any form
This machine is a modern, high performance product from Retsch GmbH and
complies with the state of the art. Operational safety is given if the machine is
handled for the intended purpose and attention is given to this technical
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documentation.
You, as the owner/managing operator of the machine, must ensure that the people
entrusted with working on the machine:
• have noted and understood all the regulations regarding safety,
• are familiar before starting work with all the operating instructions and
specifications for the target group relevant for them,
• have easy access always to the technical documentation for this machine,
• and that new personnel before starting work on the machine are familiarised
with the safe handling of the machine and its use for its intended purpose,
either by verbal instructions from a competent person and/or by means of
this technical documentation.
Improper operation can result in personal injuries and material damage. You are
responsible for your own safety and that of your employees.
Make sure that no unauthorised person has access to the machine.
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7
Notes on the Operating Manual
The Retsch representative in your country
Your supplier
Retsch GmbH directly
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Reperaturen
1.3 Repairs
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This operating manual does not contain any repair instructions. For your own
safety, repairs may only be carried out by Retsch GmbH or an authorized
representative or by Retsch service engineers.
In that case please inform:
Your Service Address:
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Confirmation
I have read and taken note of the contents of all chapters in this operating
manual as well as all safety instructions and warnings.
User
Surname, first name (block letters)
Position in the company
Signature
Service technician or operator
Surname, first name (block letters)
Position in the company
Place, date and signature
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Bestätigung
2 Confirmation
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This operating manual contains essential instructions for operating and maintaining
the device which must be strictly observed. It is essential that they be read by the
operator and by the qualified staff responsible for the device before the device is
commissioned. This operating manual must be available and accessible at the
place of use at all times.
The user of the device herewith confirms to the managing operator (owner) that
(s)he has received sufficient instructions about the operation and maintenance of
the system. The user has received the operating manual, has read and taken note
of its contents and consequently has all the information required for safe operation
and is sufficiently familiar with the device.
As the owner/managing operator you should for your own protection have your
employees confirm that they have received the instructions about the operation of
the machine.
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2.1 Type plate description
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