Operating Instructions for Oscillating Mill MM400
Retsch GmbH, 42781 Haan, Retsch-Allee 1-5, Germany |
2/8/2012 0002 |
Notes on these operating instructions
These operating instructions for the oscillating mill, type MM400, give all the necessary information on the areas mentioned in the contents.
They instruct the target group(s) for each of the defined areas, in order to ensure safe handling of the MM 400 when used for the intended purpose. Knowledge of the relevant section is an essential precondition for safe, proper use of the machine.
This technical documentation is a reference work and also a set of teaching instructions. The individual sections are complete in themselves.
These operating instructions do not include instructions for repairs. In case of possible defects or necessary repairs please contact your suppliers or Retsch GmbH direct:
Retsch GmbH, www.retsch.de/
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Contents |
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Notes on these operating instructions ..................................... |
2 |
Contents.................................................................................. |
3 |
Safety...................................................................................... |
4 |
Safety instructions ............................................................................ |
4 |
Warning signs................................................................................... |
5 |
Repairs ............................................................................................ |
5 |
Confirmation .................................................................................... |
8 |
Technical data ......................................................................... |
9 |
Use according to the intended purpose ................................................ |
9 |
Protective equipment ................................................................ |
10 |
Emissions....................................................................................... |
10 |
Protective systems .................................................................... |
11 |
Rated power:.................................................................................. |
11 |
Machine dimensions ........................................................................ |
11 |
Required floor space ........................................................................ |
11 |
Transport and installation ..................................................... |
11 |
Packing.......................................................................................... |
11 |
Transport ....................................................................................... |
11 |
Intermediate storage ....................................................................... |
11 |
Conditions for the place of installation ............................................... |
12 |
Installation..................................................................................... |
12 |
Electrical connection ........................................................................ |
12 |
Operation .............................................................................. |
14 |
Operating elements and operation..................................................... |
14 |
Graphical representation .................................................................. |
14 |
General table.................................................................................. |
15 |
Display and operating unit................................................................ |
16 |
Inserting / replacing the milling cups ................................................. |
17 |
Setting the milling time ................................................................... |
17 |
Setting the frequency ...................................................................... |
18 |
Starting the milling process .............................................................. |
18 |
Stopping the milling process............................................................. |
18 |
Storing the milling parameters.......................................................... |
19 |
Operating hours display ................................................................... |
19 |
Operating software display ............................................................... |
20 |
Replacing the machine fuses............................................................. |
20 |
Working instructions ............................................................. |
20 |
General.......................................................................................... |
20 |
The milling process.......................................................................... |
21 |
Quantities of milling material and grain sizes ...................................... |
21 |
Safety instructions for handling liquid nitrogen.................................... |
22 |
Safety functions and fault displays........................................ |
23 |
Safety functions .............................................................................. |
23 |
General ................................................................................. |
24 |
Cleaning ........................................................................................ |
24 |
Maintenance ................................................................................... |
24 |
Wear ............................................................................................. |
24 |
Wearing parts ................................................................................. |
24 |
Checks........................................................................................... |
24 |
Copyright ....................................................................................... |
24 |
Alterations ..................................................................................... |
25 |
Accessories for MM 400.................................................................... |
25 |
Safety regulations for the MM 400 - summary..................................... |
26 |
Appendix .......................................................... |
following pages |
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Safety
Target group: All persons concerned with the machine in any way
The MM 400 is a modern, highly efficient product of Retsch GmbH, corresponding to state of the art. If the machine is used according to the intended purpose with a knowledge of this technical documentation it is completely safe and reliable to operate.
Safety instructions
As the operating authority it is your duty to ensure that all persons charged with working on the MM 400:
have read and understood all the instructions on safety,
before beginning work know all the instructions and regulations for the target group relevant to their work,
have access to the technical documentation for this machine at all times, without problems.
New personnel should be familiarized with safe, proper handling of the machine before beginning work on the MM 400, either by verbal instruction from a competent person or through this technical documentation.
Improper operation can cause injury to persons or damage to the equipment. You are responsible for your own safety and that of your employees.
Ensure that no unauthorised persons have access to the MM 400.
For your own protection have your employees confirm that they have been instructed in operation of the MM 400. The draft of a suitable form is given at the end of the section on safety.
We exclude any claims for damages of any kind for injury to persons and damage to equipment arising from non-observance of the following safety instructions.
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Warning signs
Warnings are given by the following signs:
Injury to persons
Damage to equipment
Observe instructions for use
Repairs
These operating instructions do not include repair instructions. For your own safety repairs must be carried out only by Retsch GmbH or an authorised agent (service technicians).
In this case please contact:
The Retsch agency in your country
Your supplier
Retsch GmbH directly
Your service address:
____________________________________
____________________________________
____________________________________
____________________________________
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Safety instructions
We exclude any liability for claims for damages in any form whatsoever for injury to persons or damage to the machine caused through non-observance of the following safety instructions.
Use according to the intended purpose
Do not make any alterations to the machine and use only spare parts and accessories approved by Retsch. Otherwise the Declaration of Conformity with European directives made by Retsch will lose its validity. Furthermore this will also lead to the loss of any guarantee claims.
Packing materials
Please keep the packing material for the duration of the guarantee period, since, in case of a complaint and return of the machine in unsuitable packing material your guarantee claim will be at risk.
Transport
The MM 400 must not be jolted, shaken or thrown during transport. Otherwise the electronic and mechanical components may be damaged.
Temperature variations
If subjected to high temperature variations (e.g. during transport by aircraft) the MM 400 must be protected against condensed water. Otherwise the electronic components may be damaged.
Supply schedule
If the delivery is incomplete and/or transport damage is found, you must inform the transporter and Retsch GmbH immediately (within 24 hrs). Later complaints may possibly be no longer considered.
Conditions for the place of installation
If the temperature drops below or exceeds the ambient temperature the electronic and mechanical components may be damaged; the performance data are then altered to an unknown extent.
At high atmospheric humidity the electronic and mechanical components may be damaged and the performance data are altered to an unknown extent.
Electrical connection
If the values on the rating plate are not observed the electrical and mechanical components may be damaged.
Inserting / replacing the milling cups
Ensure that the milling cups are inserted correctly in the milling cup holder – otherwise they can become damaged when starting the machine.
Both milling positions must always be used since otherwise this will cause considerable unbalance.
When removing and opening hot milling cups always wear protective gloves.
Danger of burning the hands.
General
Observe the relevant regulations and directives of your country for handling chemicals and hazardous materials.
Apply these when working with the MM 400.
Materials
Milling of materials with the MM 400 which give a risk of fire or explosion is prohibited.
Please take the necessary measures, depending on the hazardous nature of your sample, to prevent danger to persons.
Note also that the properties, and therefore the hazardous nature of your sample, can change during the milling process.
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Safety instructions for handling liquid nitrogen
Always wear protective goggles and protective gloves when handling liquid nitrogen.
Liquid nitrogen has a temperature of –196°C and can cause frostbite or injury similar to burns if it comes into contact with the skin or eyes.
Follow the safety regulations of the cooling liquid supplier.
Retsch GmbH accepts no liability whatsoever arising from the use of liquid nitrogen or similar materials.
Cleaning
Do not clean the MM 400 under running water. Danger to life through current surge.
Use only a cloth moistened with water. Cleaning agents and solvents should not be used – not for cleaning the milling tools either.
Accessories for the MM 400
Do not make any alterations to the machine and use only spare parts and accessories approved by Retsch.
Otherwise the Declaration of Conformity with European directives made by Retsch will lose its validity. Furthermore this will also lead to the loss of any guarantee claims.
Wearing parts
These operating instructions do not include any repair instructions. For your own safety repairs should be carried out only by Retsch GmbH or an authorised agent (service technicians).
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Confirmation
I have taken note of the sections „Notes on these operating instructions” and “Safety”
_______________________________________
Signature of operating authority
_______________________________________
Signature of service technician
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Technical data
Target group: Operating authority, operator
Machine type designation: MM 400
Use according to the intended purpose
The MM 400 is a laboratory machine and is suitable for milling and homogenising soft, fibrous, hard and brittle materials in the wet and dry state.
The MM 400 is designed for use with screw-type milling cups with a steel casing and a milling set with clamping centerings of dia. 36 mm and a min. clamping length of 60 mm. It is used for fast, super fine milling of 2 samples simultaneously. Ceramic milling cups without a complete steel casing must not be used.
The closed milling system guarantees complete recovery of the samples. Owing to the extremely short milling time and the high final fineness of the material to be milled the MM 400 is also ideally suitable for sample preparation for all spectral analyses.
Final finenesses of down to 1 µm can be achieved, depending on the milling time and the specific properties of the sample material. The optimum milling cup filling is as a rule 1/3 of the milling cup volume.
Exceptions to this are voluminous materials, such as wool, leaves, grasses and suchlike. In these cases a filling level of 70-80% is necessary.
The sample quantity should not be less than 25% of the milling cup volume.
The milling ball/s may otherwise damage the milling cups.
The milling cup materials and milling ball materials must always be identical.
The milling ball/s may otherwise damage the milling cups.
Do not make any alterations to the machine and use only spare parts and accessories approved by Retsch.
Otherwise the Declaration of Conformity with the European directives by Retsch loses its validity.
Futhermore this will result in the loss of any kind of guarantee claim.
Do not clamp any ceramic milling cups of the MM 2/200 or any milling cups without a complete steel casing.
Clamping by the metallic components of the milling cup holder of the MM 400 can cause damage to the ceramic parts.
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Do not use ceramic or natural stone milling cups for milling graphite or graphite mixtures.
The high lubricating properties of graphite cause high milling ball speeds, the energy of which cannot be absorbed by the material owing to its low density.
For this reason there is a danger that the ceramic or natural stone inserts of the milling cups will be destroyed by the ball/s.
For further information our application laboratory will be pleased to assist you.
Protective equipment
The milling chamber of the laboratory mill MM 400 is enclosed by a strong covering hood.
Starting the machine is possible only with the hood closed.
Emissions
Noise characteristic values :
The noise characteristic values are also influenced by the properties of the material to be milled.
Example 1: |
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Intensity of sound LWA |
= 71.4 dB(A) |
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Emission value related to |
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workplace LpAeq |
= 61 dB(A) |
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Operating conditions: |
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Container: |
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2 steel milling cups of 25 ml |
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Milling organ: |
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1 steel ball 20 mm |
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Material charged: |
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Quartz crushed pebbles approx. |
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4.0 – 6.0 mm |
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Charged quantity: |
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8ml |
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Example 2: |
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Intensity of sound LWA |
= 76 dB(A) |
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Emission value related to |
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workplace LpAeq |
= 65 dB(A) |
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Operating conditions:
Container: 2 steel milling cups of 5 ml
Milling organ: 2 tungsten carbide balls 8 mm
Material charged: Quartz crushed pebbles approx. 1.0 – 1.5 mm
Charged quantity: 1.5ml
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