Retsch GRINDOMIX GM 200 Operating Instructions Manual

Operating Instructions for the Cutting Mill

Type

GRINDOMIX GM 200

 Retsch GmbH & Co. KG, 42781 Haan, Rheinische Str.36, Germany, Doc.no. GB 98. 251.9999 C

22.02.2002  Retsch GmbH & Co. KG 2 Doc.no. GB 98.251.9999 C

Notes on the operating instructions

These operating instructions for the laboratory knife mill type
GRINDOMIX GM 200 provide all the necessary information on the
topics named in the table of conte nts.
They guide the defined target group(s) for the relevant fields towards
safe and correct procedures for handling the GRINDOMIX GM 200.
Safe and correct handling is only possible when the relevant target
group(s) are familiar with the chapters concerned.
This technical docume ntation constitutes both a refere nce work and a
tutorial. The individual chapters are self-contained units.
These operating instructions do not contain any instructions for re­pairs. Should any repair s become necessary, please contact your su p­plier or contact Retsch GmbH dir ect.

22.02.2002  Retsch GmbH & Co. KG 3 Doc.no. GB 98.251.9999 C

Notes on the operating instructions....................................................... 2

Safety ........................................................................................... 4

Notes on safety.................................................................................4

Warning notes ..................................................................................5

Repairs ........................................................................................... 5

Confirmation ...................................................................................5

Technical Data................................................................................ 6

Use for the intended purpose................................................................ 6

Description of function....................................................................... 6

Protection systems.............................................................................7

Drive .............................................................................................8

Motor power....................................................................................8

Rated voltage ................................................................................... 8

Speed.............................................................................................8

Emissions........................................................................................8

IP rating .........................................................................................8

Dimensions ..................................................................................... 8

Installation area required......................................................................8

Transport and installation................................................................... 9

Packaging........................................................................................ 9

Transport........................................................................................9

Temporary storage.............................................................................9

Scope of supply.................................................................................9

Parameters for the installation point........................................................ 10

Installation ......................................................................................10

Electrical connection.......................................................................... 10

Operation ...................................................................................... 11

Controls and operation........................................................................11

Table of controls............................................................................... 12

Operating the GRINDOMIX GM 200....................................................13

Switching ON and OFF ...................................................................... 13

Opening the cover.............................................................................13

Inserting the vessel ............................................................................. 13

Using Grinding Containers with Different Materials..................................... 14

Lid and vessel combinations .................................................................15

The 1000 ml lid.................................................................................15

The 500 ml lid .................................................................................. 15

The gravity lid ..................................................................................15

Loading the machine ..........................................................................16

Setting the time.................................................................................17

Setting the speed...............................................................................17

Interval mode...................................................................................17

Memory buttons ...............................................................................18

Loading a program............................................................................. 18

Starting - Interrupting - Stopping ...........................................................18

Replacing fuses................................................................................. 19

Setting Back the Overload Fuse.............................................................19

Notes on Operation .......................................................................... 20

General .......................................................................................... 20

Notes on sample milling ......................................................................20

General ......................................................................................... 23

Accessories...................................................................................... 23

Cleaning .........................................................................................24

Cleaning of the milling tools, vessel and lid ............................................... 24

Maintenance ....................................................................................24

Necessary safety tests..........................................................................24

Copyright........................................................................................24

Modifications ...................................................................................24

Fault display.....................................................................................25

Safety regulations (Table)..................................................................... 26

Safety regulations (Table 2)...................................................................27

Warranty conditions.......................................................................... 28

22.02.2002  Retsch GmbH & Co. KG 4 Doc.no. GB 98.251.9999 C

Safety

Target group: All persons dealing with the machine in any way.

The GRINDOMIX GM 200 laboratory knife mill is a highly modern,
efficient product from Retsch GmbH. Its engineering is state of the art.
When handled correctly by persons familiar with the machine and this
technical documentation, the GRINDOMIX GM 200 is perfectly safe
and reliable in operation.

Notes on safety

You, as the operator, are responsible for ensur ing that the persons ap­pointed to work with the GRINDOMIX GM 200:

• have read and understood all the regulations concerning
safety,

• are familiar with all procedures and instructions for their rele­vant target group before starting work,

• have access to the technical documentation for this machine
at any time and without problems.

You should ensure that new pe rsonnel are instructed in safe and cor­rect handling either orally by a competent person and/or by this tech­nical documentation before sta rting work with the GRINDOMIX GM

200.

Incorrect operation can lead to d amage or injury. You are responsible
for your own safety and that of your staff.

Please ensure that no unauthorised persons have access to the
GRINDOMIX GM 200.

For your own protection, have your staff confirm their instruction in
the operation of the GRINDOMIX GM 200. You will find an appro­priate draft form at the e nd of the chapter on safety.

We accept no liability whatsoever for any damage or injury resulting
from non-observance of the f ollowing notes on safety.

22.02.2002  Retsch GmbH & Co. KG 5 Doc.no. GB 98.251.9999 C

Warning notes

We use the following symbols to warn agai nst:

!

Personal injury

Damage to property

Repairs

These operating instructions do not c ontain a ny instr uc tions on repairs.
For your own safety, only ha ve re pairs per formed by Re tsch GmbH or
an authorised representative (service technicians).

In such cases, please notify:

The Retsch agency in your country

Your supplier

Retsch GmbH direct

Your service address:

Confirmation

I have read and noted the chapters entitled Foreword and Safety.

_________________________________________

Operator’s signature

_________________________________________

Service technician’s signature

22.02.2002  Retsch GmbH & Co. KG 6 Doc.no. GB 98.251.9999 C

Technical Data

Target group: Operators
Machine type designation: GRINDOMIX GM 200

Use for the intended purpose

The GRINDOMIX GM 200 laboratory knife mill is suitable for the
comminution, homogenisation and mixing of soft to mediu m-hard, wa­ter and grease containing, fibrous and dry materials ready for analysis in
a matter of seconds. The GRINDOMIX GM 200 is designed for quan­tities up to approx. 700 ml, and up to 1000 ml for large volume materi­als. The input particle size is <30 - 40 mm.

It is particularly designed for the milling of the following materials:
Fish, meat, vegetables, cheese, preserves, seeds, bacon, sausage, dry
bread and pastry pr oducts, all products containing wate r or rich in fat,
fibrous products and similar materials.

The GRINDOMIX GM 200 is not designed as a production machine,
but as a laboratory instrume nt intended for 8 hour single shift opera­tion at a continuous duty fa ctor of 30%.

This machine is not suitable for the mixing and homogenisation of liq­uids or low viscosity emulsions and suspensions.

For further information, please contact our applications labora tory
staff, who will be pleased to help.

Do not modify the machine in any way, and use only spare parts
and accessories approved by Retsch.

The conformity with European Directives declared by
Retsch will otherwise be invalidated.

Furthermore, this will lead to all warranty claims being ren­dered null and void.

Description of function

The comminution process in the GRINDOMIX GM 200 takes place
by cutting.

The knife blades are straight and arranged at a right angle to the direc­tion of rotation.

The knives are slim, with a cutting edge angle of 15° and a 30° leading
facet.

With this cutting edge geometry, the entire momentum resulting from
the difference in velocity between the particles of process material and
the blades can be used as the cutting force.

The speed is between 2000 and 10000 rpm, and is set and digitally dis­played in steps of 500 rpm.

The selected speed is kept c onstant by a controller during milling.

22.02.2002  Retsch GmbH & Co. KG 7 Doc.no. GB 98.251.9999 C

Interval mode is started by holding the start button depressed. It has
proven advantageous to start milling in interval mode for pre­granulation and homogenisation of coarse, tough, fibrous, very soft or
highly elastic products.

The milling duration can be set at up to 3 min., and on completion of
milling the motor switches off automatically and the housing cover
opens.

3 memory locations facilitate the saving and loading of frequently used
speed/time combinations at the touch of a button.

The milling result is also influenced by the relationship between the
milling chamber volume and the quantity of material to be processed.
Various vessel/lid combinations are therefore available to the user:

For the plastic vessels, plastic lids for 500 and 700/1000 ml and a grav­ity lid are available.

The 700/1000 ml plastic lid is used for large quantities of small grained
materials such as seeds, pepper corns and cheese. The input quantity is
between 300 and max. 700 ml.

The 500 ml plastic lid is used for smaller quantities of small grained
materials such as seeds, pepper corns and cheese. The input quantity is
max. 300 ml.

The gravity lid is used for large volume materials and materials contain­ing water, such as lettuce and tomatoes. Under the force of its own
weight, the lid automatically adapts to fit the milling chamber volume
during the milling operation.

700/1000 ml plastic lids and a separate gravity lid are available for the
glass vessels.

Protection systems

The milling chamber of the GRINDOMIX GM 200 is secured by an
especially robust housing cov er.

The machine can only be started when the cover is closed, and the
cover can only be opened when the motor is at a standstill.

In case a fault should occur, there is also an electrical emergency brake
which brings the blade to a standstill in a fraction of a second, even
from its maximum speed.

Should an overload cause the actual speed to deviate by more than 5 %
from the specified speed set, this is indicated by flashing displays.

22.02.2002  Retsch GmbH & Co. KG 8 Doc.no. GB 98.251.9999 C

Drive

Series-wound motor

Motor power

750 watts

Rated voltage

230V 50 Hz and
100 - 110V 50 / 60Hz

Speed

Knife speed variable from 2000 to 10000 rpm

Emissions

Noise characteristics:

Noise measurement to DIN 45635-031-01-KL3
The noise levels are also infl uenced by the properties of the material to
be milled.

Example 1:

Sound power level L

WA

= 79.2 dB(A)

Workplace related emission level L

p eq

= 66.9 dB(A)
Service conditions:
Vessel = Glass vessel with gravity lid
Milling unit = Knife in stainless steel
Input material = Tomatoes, quartered, approx. 40 x 25mm
Input quantity = 100g

Example 2:

Sound power level L

WA

= 86.2 dB(A)

Workplace related emission level L

p eq

= 73.9 dB(A)
Service conditions:
Vessel = Glass vessel with gravity lid
Milling unit = Knife in stainless steel
Input material = Cheese, approx. 20 x 20mm
Input quantity = 100g

IP rating

Milling chamber and keyboard IP42
In the area of the ventilation slots IP20

Dimensions

Height: up to approx. 370mm, Width: 200mm, Depth: 270mm
with cover open

Height: up to approx. 450mm, Width: 200mm, Depth: 400mm
Weight: approx. 7.5 kg without plastic vessel and knife

Installation area required

200 mm x 400 mm; no safety clearances are necessary.

22.02.2002  Retsch GmbH & Co. KG 9 Doc.no. GB 98.251.9999 C

Transport and installation

Target group: Operators, carriers

Packaging

The packaging is suitable for the particular me ans of transpor t. It com­plies with the general packaging regulations.

Please keep the packaging for the duration of the guarantee pe­riod, as your guarantee claim may be invalidated if there is a com­plaint and the unit is returned in inad e quate packaging.

Transport

The GRINDOMIX GM 200 must not be jarred, shaken or
thrown during transport. This could damage the electronic and
mechanical components.

Temperature fluctuations

When subjected to major temperature fluctuations (e.g. during air
transport) the GRINDOMIX GM 200 is to be protected from
condensation. Damage to the ele ctronic components may other­wise result.

Temporary storage

Ensure that the GRINDOMIX GM 200 is stored in a dry place even
when storage is temporary.

Scope of supply

• 1 GRINDOMIX GM 200

• 1 plastic vessel

• 1 lid, 1000 ml

• 1 knife cylinder

• 1 instruction manual

Check that the delivery is complete, including any accessories ordered
in addition.
Check that the GRINDOMIX GM 200 functions perfectly (see the
chapter on operation).

In cases of incomplete delivery and/or transport damage, you
must notify the forwarding agent and Retsch GmbH without
delay (within 24 hours). It may not be possible to accept subse­quent complaints.