Fritsch PULVERISETTE 15 User manual

Operating Instructions
Cutting Mill
„ pulverisette 15 “

Edition 06/2003 Index 003 checked and released
Fritsch GmbH
Laborgerätebau
Industriestrasse 8
D - 55743 Idar-Oberstein
Phone: [phone]
Fax: [phone]
E-Mail: [email protected]
Internet: http://www.fritsch.de
Instrument number 15.40XX.00
Applies as of serial number 2000
Fritsch GmbH, Laborgerätebau has been certificated by the TÜV-
Zertifizierungsgemeinschaft e.V. on June 24, 1994.
An audit certificated the accordance of the Fritsch GmbH to the DIN EN
ISO 9001.
The enclosed declaration of conformity calls the directives which the
„pulverisette 15“ corresponds to. This permitts us to mark the instrument
with the CE-Sign.

pulverisette 15
Table of contents
page
1General Information / Introduction.........................................1
1.1 Notes about Operating Instructions......................................................1
1.2 Explanations of the signs at the instrument and
in the operating instructions .................................................................2
1.3 Brief Description of the Instrument.......................................................3
1.3.1 Applications .....................................................................................................3
1.3.2 Method of Operation........................................................................................3
1.3.3 Drive Motor......................................................................................................3
1.4 Technical Data......................................................................................5
2Operating Safety ......................................................................6
2.1 General Safety Instructions..................................................................6
2.2 Operators..............................................................................................7
2.3 Protective Equipment ...........................................................................7
2.4 Danger Points.......................................................................................8
2.5 Electrical Safety....................................................................................8
3Installation................................................................................9
3.1 Unpacking.............................................................................................9
3.2 Transport ..............................................................................................9
3.3 Erection.................................................................................................9
3.4 Ambience conditions ..........................................................................10
3.5 Electrical Connection..........................................................................10
3.5.1 Adapting the cutting mill to the available supply.............................................10
3.6 Before Switching On for the First Time ..............................................10
3.7 Switching On for the First Time / Test for Correct Functioning.........10
4Working with the Cutting Mill................................................11
4.1 Preparation for milling.........................................................................11
4.1.1 Insert sieve ....................................................................................................11
4.1.2 Checking the blade gap.................................................................................11
4.1.3 Closing the cutting mill...................................................................................11
4.2 Milling process....................................................................................12
4.2.1 Attaching the collector....................................................................................12
4.2.2 Insert the material to be cut ...........................................................................12
5Cleaning..................................................................................13
5.1 Cleaning the mill chamber..................................................................13
6Maintenance ...........................................................................14
6.1 Removal and fitting of cutting blades .................................................15
6.1.1 Removal and fitting of rotating blades............................................................15
6.1.2 Removal and fitting of fixed blades................................................................15
7Warranty..................................................................................16
8Troubleshooting Checklist....................................................16

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1 General Information / Introduction
1.1 Notes about Operating Instructions
•The copyright to these technical documents is the property of
Fritsch GmbH, Manufacturers of Laboratory Instruments.
•These operating instructions are not to be reprinted or copied
without the express approval of Fritsch GmbH.
•Please study these instructions carefully before attempting to
operate the machine.
•All operators must be familiar with the contents of the operat-
ing instructions.
•Please observe all notes concerning your safety.
•The cutting mill was designed with the user's safety in mind,
however inherent risks cannot be excluded. Follow the advice
in these instructions to avoid risks to users.
•The symbols in the right hand margin highlight the risks de-
scribed in the text. Symbols are also to be found on the in-
strument warning users of possible risks.
Warning symbols are surrounded by a triangle.
•These operating instructions do not constitute a complete
technical description. They describe only the details required
for safe operation and maintenance for usage under normal
conditions.

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1.2 Explanations of the signs at the instrument and
in the operating instructions
Attention!
Warning against danger spot!
Observe operating instructions!
Attention!
Mains voltage!
Attention!
Risk of explosion!
Attention!
Hot surface!
Attention!
Inflammable substances!
Wear protective gloves!
Wear ear protectors!
Wear eye shield!
Do not walk under
suspended load!

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1.3 Brief Description of the Instrument
1.3.1 Applications
The cutting mill can be used for rapid comminution of soft to medium-
hard and fibrous materials.
plants: sheets spices wood corn malt
straw peat roots tobacco
drugs: dragèe tablets
foods: maize confection-
ery pasta dried meat
cellulose: fibre fabric card-
board paper
miscella-
neous: iron-free refuse animal feed
pellets
horn bone plastics
sheet rubber coal leather ….
1.3.2 Method of Operation
Material to be cut is fed from a hopper
into the cutting chamber by means of
a pusher. Here, four rotating blades
work against three fixed blades to
chop up the sample. The bottom of the
cutting chamber is closed by a sieve
insert. Comminuted material passes
through the sieve and is collected in a
pot.
1.3.3 Drive Motor
Driven by: 1~100/ 120 V Motor or
1~230 V Motor or
3~230/400 V Motor.
The machine is driven by a three-phase a.c. motor or an a.c. mo-
tor with no mechanical brake.

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Direction of rotation of the drive motor
Viewed from the drive side, the 3-phase AC motor should rotate anti-
clockwise. (Viewed from the front, looking at the cutting mill, anticlock-
wise; viewed from the rear, looking at the motor cooling grid, clockwise.)
The single-phase AC motor is factory-set to rotate anticlockwise.
See:
•DIN VDE 0530 part 8 “Terminal marking and direction of ro-
tation”
•DIN VDE 0530 Teil 7 / EN 60 934-7 “Type codes”.
The direction of rotation of the 3-phase motor can be changes by swap-
ing two of the leads, L1, L2 and L3 (either at the motor terminals or in
the plug).
The direction of rotation may only be changed by a trained electri-
cian.

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1.4 Technical Data
Dimensions and weight
Dimension on the stand: 1450 x 620 x 580 mm
Dimension on the table: 690 x 420 x 480 mm
(height x width x depth)
Weight: 42 kg (net weight)
72 kg (gross weight)
Noise level
The noise level is approx. 99dB (A).
Voltage 1~ 115 / 230V ± 10% 3~ 230 / 400V ± 10%.
Current
consumpti-
on
100-120 V / 16,5 A
200-240 V / 9,5 A 230 V / 5,7 A
400 V / 3,3 A
Power con-
sumption 1,76 / 2,1 kW
with high loading (sig-
nificantly less in normal
use).
1,9 kW
with high loading (sig-
nificantly less in normal
use).
Transient overvoltages according to overvoltage category II allowed.
(See also section 3.5 Electrical Connection)
Electric fuses
•Thermal protection switch (motor protection switch); ready for
operation again automatically after cooling down (a few min-
utes).
Material
•Feed particle size maximum 60 mm
•Feed amount maximum 800 ml
Final fineness
Achievable mean final fineness 0.25-6 mm depending on sieve.

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2 Operating Safety
2.1 General Safety Instructions
•Read the operating instructions carefully before use.
•The instrument can only to be used for the purpose described
in section 1.3.1 Applications.
•We recommend that a safety logbook should be kept in which
all work (service, repairs etc.) carried out on the machine
should be entered.
•Use only original accessories and original spare parts. Failure
to do so may call into question the performance of the instru-
ment.
•Do not use damaged accessories.
•The operators must be familiar with the contents of the operat-
ing instructions.
To this end, for example, the operating instructions must be
kept with the instrument.
•Do not remove labels.
•Protective devices must not be made unserviceable or re-
moved.
•Unauthorized modification of the instrument or any part
thereof will result in the loss of the conformity to European di-
rectives which is asserted by Fritsch and the warranty.
•Wear protective gloves while cleaning the cutting chamber.
•Wear ear protectors if the noise level is higher than 99dB(A).
•Wear eye shield!
•Behaviour at all times must be such as to strictly preclude any
risc of accidents.
•Furthermore, the MAC values at place of work specified in the
pertinent safety regulations must be adhered to. Where appli-
cable, ventilation must be provided or the instrument must be
operated under an exhaust hood.
•When oxidizable materials such as metals, organic materials,
wood, coal, plastic, etc. are ground or sieved, the risk of spon-
taneous ignition (dust explosion) exists whenever the fine par-
ticles exceed a specific percentage. While such materials are
being ground or sieved, it is therefore necessary to take spe-
cial safety precautions (e.g. wet grinding or wet sieving) and
the work must be supervised by a specialist.
•The instrument is not explosion-proof and is unsuitable to
grind or sieve materials which are explosive, combustible or
promote combustion.
•Do not run the cutting mill unsupervised.

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2.2 Operators
•No one other than authorized persons should operate the in-
strument and it must be serviced and repaired by trained spe-
cialists.
•No one suffering from medical problems or under the influence
of medications, drugs, alcohol or overtiredness should be per-
mitted to operate the instrument.
2.3 Protective Equipment
Protective equipment must be used as intended and must not be
rendered disabled or dismantled.
All protective devices should be regularly checked for complete-
ness and to ensure that they are functioning correctly. See also
section 6 Maintenance.
The cutting mill has an extensive safety system:
1. Protective switch on mill cover
This monitors whether the cover is closed and prevents the
mill from operating if it is open.
⇒The mill will not start if the mill cover is open
2. Protective switch on collector
During operation this monitors correct seating of the collector
(3.5-litre pot or 30-litre container) and prevents the mill from
starting in the absence of a collector.
⇒The mill will not start if the collector is not correctly at-
tached.
Both switches meet the personal safety requirements
The protectective switches do not latch the hopper lid and collec-
tor.
If the lid is opened or the collector is removed, the motor will stop.

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2.4 Danger Points
•Danger of injury from sharp blades!
•Danger of pinching when closing hopper lid!
•Danger of pinching when opening the upper half of the hous-
ing! (Carefully place the housing half on the support pro-
vided)
•Danger of pinching when closing the upper half of the hous-
ing!
•Danger of pinching under the hopper lid!
•Danger of pinching when fitting and releasing the collector!
2.5 Electrical Safety
General
On turning the switch to Stop (0) the motor is switched off.
⇒The mill will stop within seconds.
•The collector can be detached.
•The mill cover can be opened.
Protection against Restarting
If power fails during operation, the motor is switched off.
⇒The mill will stop within seconds.
•The collector can be detached.
The mill does not restart when the supply returns.
⇒The mill is secured against restarting.
⇒On turning the switch to Start (I), the motor is switched
on and the mill takes up its function.
Overload Protection
In the event of overloading, a motor current protection switch will switch
off (the rotary switch returns to the STOP (0) position).

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3 Installation
3.1 Unpacking
•Remove the nails with which the hood is fastened on the
transport pallet. The hood either a wooden box or a cardboard
box placed on the transport pallet.
•Lift the hood off the transport pallet.
•Check that the items supplied correspond to your order before
proceeding.
3.2 Transport
•Transport the machine on the transport pallet using a fork lift
truck or hand fork lift truck.
•To carry the machine, grip it below at the front and the back.
Carrying the machine will require at least two persons.
3.3 Erection
•The cutting mill is secured to the transport pallet by four
screws. Undo the four screws.
•Lift the cutting mill off the transport pallet.
Lifting the machine down will require at least two persons.
Position the cutting mill on
1. a strong table or bench and screw the fixing motor base to the
top so that the collector flange projects over the edge - or
2. screw the cutting mill onto its stand so that it is above the two
feet of the stand.
Please ensure that the machine is fastened securely, as consider-
able transverse forces do occur.
•Ensure that there is good access to the cutting mill. En-
sure that to the right of the mill, there is sufficient space
for the housing upper section including the funnel to be
opened.
•Do not block the ventilation louver at the rear. There is a
danger of overheating if the louver is blocked.

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3.4 Ambience conditions
•Use the instrument only inside.
•The air must not contain any electrical conductive dust.
•The ambient temperature must be between 5 and 40°C.
•Height up to 2000m M.S.L.
•Maximum relative humidity of air 80% temperature up to 31°C,
linear decreasing down to 50% relative humidity of air at 40°C
•Contamination level 2 (IEC 664)
3.5 Electrical Connection
Before making the connection, compare the voltage and current values
shown on the nameplate with the values of the mains supply to which
the machine is to be connected.
(See section 1.4 Technical Data)
3.5.1 Adapting the cutting mill to the available sup-
ply
Changing the required supply voltage from 230 ~3 to 400 ~3 volts and or
changing the connecting cable mayonly be carried out by a trained elec-
trician.
3.6 Before Switching On for the First Time
The rotor must be checked to see that it rotates freely. For this purpose,
release the knurled knob on the mill cover and open the cover. If the
rotor turns freely by hand, close the cover again.
If the rotor does not turn, see section 4.1.2 Checking the blade gap.
Attention: danger of injury from sharp blades
3.7 Switching On for the First Time /
Test for Correct Functioning
Switch on the machine only when all the work described in section 3
Installation has been done.
Switching on: turning the switch to “Start” (1)
Switching off: turning the switch to “Stop” (0)

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4 Working with the Cutting Mill
4.1 Preparation for milling
4.1.1 Insert sieve
To insert the sieve, open the mill cover and insert the sieve
from the front or loosen the knurled knob on the left side,
open the upper housing halves and insert the sieve.
The welded part of the sieves have to fit left justified in the
grinding chamber, i. e. the openings of the trapezoidal per-
foration are directed to the rotationing rotor.
Close the housing halves and screw the knurled knob tight.
Turn the cutting rotor carefully by hand. The rotor must turn
freely. If this is not the case, see sections 4.1.2 Checking the
blade gap and 6.1 Removal and fitting of cutting blades.
Attention: danger of injury from sharp blades
4.1.2 Checking the blade gap
The rotating blades must not touch the fixed blades – the
gap between them is set at works:
0.2 - 0.3 mm for fixed blades
The rotating blades must be set parallel
to the fixed blades.
Turn the cutting rotor carefully by hand.
Attention: danger of injury from sharp blades
If the rotor cannot be turned, see section 6.1 Removal and fitting
of cutting blades.
4.1.3 Closing the cutting mill
Before closing the mill cover, please check:
•that the cutter rotor and sieve are firmly seated,
•that the conical guide on the cutting rotor is clean,
•that the conical guide in the mill cover is clean.
Close the mill cover and screw fast with the knurled knob –
the safety switch should be actuated.

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4.2 Milling process
4.2.1 Attaching the collector
Engage the flange of the choppings collector (3.5-l pot or 30-l container)
in the toggle catches and close both toggles at the same time – the
safety switch should be actuated.
4.2.2 Insert the material to be cut
Note: first turn on the cutting mill, then insert the material.
1. Push in the pusher,
2. Turn on the mill,
3. Open the hopper,
4. Insert the material to be cut,
5. Lift pusher carefully to the end-stop,
6. Slowly lower the pusher and push the material into the cutting
chamber.
7. Note that the material may become heated – allow cool-
ing pauses if necessary!
8. When milling is finished: carefully release the collector
latches.
Release both latches together.
ATTENTION:
Only insert as much material as the machine can reasonably handle.
Excessive quantities can block the mill.
If the mill is blocked, switch it off and clear it of material.
Before restarting, check the blade gap (see section 4.1.2 Checking the
blade gap).
1, 5, 6
2
3, 4
8

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5 Cleaning
Disconnect mains connector before starting any work.
Disconnect mains connector and secure instrument against being
turned on again accidentally!
The mill casing can be wiped off with a damp cloth.
Do not allow any liquids to seep into the machine.
5.1 Cleaning the mill chamber
Open the laboratory cutting mill:
•Open the cover
•Set the rotary blade in a vertical position
•Open the upper housing halves
•Remove the sieve
It is recommeded that the cutting chamber is cleaned with a brush and
vacuum cleaner or with compressed air.
Attention: danger of injury from sharp blades

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6 Maintenance
Disconnect mains connector before starting any work.
Disconnect mains connector and secure instrument against being
turned on again accidentally!
When maintenance work is being performed, this should be indi-
cated with a warning sign.
Functional part Function / Form Assay Maintenance
interval
Safety switch 1
(actuated by closing
mill cover)
Prevents starting
Open cover: rotary switch will not stay on
the on position but
jumps back.
Attention!! If the
switch is faulty, the
mill will start, Keep
away from rotating
blades.
Check switch
before each use
(replace if de-
fective)
Safety switch 2
(actuated by attaching
collector)
Prevents starting
Collector not at- tached: rotary switch
will not stay in the on
position but jumps
back.
Attention!! If the
switch is faulty, the
mill will start, Keep
away from rotating
blades.
Check switch
before each use
(replace if de-
fective)
Conical guides on cut-
ting rotor and cover Guide rotor Cleaning Before each use
Gap between rotating
and fixed blades Cutting action Check gap Visual check before each use
Gap between rotating
and fixed blades Cutting action Check gap Measure every 500 hours
Rotary bearings Permanent lubrica-
tion Play 2,000 hours
Drive motor Permanent lubrica-
tion Play 4,000 hours
Silicone rubber cover
seal Sealing Distortion and soiling Before each use

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6.1 Removal and fitting of cutting blades
Depending on the materials chopped and the operating hours, the rotat-
ing blades must be changed or, like the fixed blades, sharpened or re-
placed.
6.1.1 Removal and fitting of rotating blades
To remove the rotating blades, open the upper part of the housing (see
section 5.1 Cleaning the mill chamber). The rotating blades are then
freely accessible. The fixing screws can be loosened with a 6-mm hex-
agonal key.
When fitting, first align only one blade parallel to the edge of the rotor
and screw it fast.
⇒This blade is used to adjust the fixed blades.
The remaining three rotating blades are not fitted until the fixed blades
have been fitted and/or adjusted, and are set for a spacing of 0.2 – 0.3
mm from the left-hand fixed blade.
6.1.2 Removal and fitting of fixed blades
To remove one of the fixed blades, loosen the middle fixing screw and
withdraw the blade.
Before fitting the fixed blades, at least one rotating blade must be in-
stalled.
The fixed blades are held in position by the middle fixing screw and the
two outer pressure screws.
The gap between this blade and the installed rotating blade is adjusted
to 0.2 – 0.3 mm (80 g/m2printing paper folded in two).
Attention:
After setting the fixed blades, be sure to tighten the fixing screws.
After fastening the fixed blades, the remaiing 3 rotating blades are fitted
and screwed tight (see above).

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7 Warranty
The warranty card accompanying this instrument must be returned to the
manufacturer, duly filled out, in order for the warranty to become effec-
tive.
We, Fritsch GmbH, Germany, our application technology laboratory and
our agent in your country will gladly provide advice and assistance with
this instrument.
Always include the serial number shown on the nameplate with any que-
ries.
8 Troubleshooting Checklist
Functional error Possible cause Corrective measure
Mill fails to start No power connected Insert plug
Safety switch 1 open Close cover properly
Safety switch 2 open Fit collector properly
Rotor does not
turn Blade gap incorrect Readjust blade gap, see section 4.1.2 Checking the
blade gap, 6.1 Removal
and fitting of cutting blades
Mill stops during
operation Motor overheated Check fan, allow mill to cool
Overload,
Motor protection switch
actuated
Allow mill to cool,
clear of material,
reduce material feed rate
Poor milling re-
sult Incorrect direction of rotation Check rotation: Anticlockwise from drive
side
Material escapes Cover leaking Replace seal
Tightening screw loose Tighten screw
Defective sealing ring Replace sealing ring
Runs rough with
heavy vibration Uneven setting of rotary blades Adjust rotating blades
Cutting rotor dirty Clean cutting rotor
Feet standing uneven Ensure machine stands
firm
Incorrect direction of
rotation Check rotation: Anticlockwise from drive
side