Pfeuffer Friabilimeter User manual

PFEUFFER GmbH
Flugplatzstraße 70
97318 Kitzingen
GERMANY
Phone: [phone]
[email protected]
www.pfeuffer.com
Revision 8.2/14.02.2024
Translation of the original operating instructions
Item number operating instructions:
Artikelnummer Betriebsanleitung:
1810 0091
Operating instructions
Malt friability measuring instrument
Friabilimeter

Translation
In the event of delivery of subsequent sale to the countries of the European Economic Area (EEA), the operating
instructions must be translated into the corresponding language of the country of use. In the event of discrepancies
in the translated text, the original operating instructions (German) must be used for clarification, or the
manufacturer must be contacted.
Operating instructions in electronic format
The original operating instructions (German) and translations of the original operating instructions can be requested
as PDF files by e-mail. Specifying the correct type designation and serial number is important for further processing!
© Copyright
This document is not allowed to be communicated or duplicated, utilized without express permission, which also
applies to communicating its content. Offenders are liable to the payment of damages. All rights reserved with
regard to patent claims or submission of design or utility patent.
(DIN ISO 16016)
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Operating instructions Friabilimeter | Revision 8.2
These Operating Instructions are a constituent part of the FRIABILIMETER and must be available to all
operating personnel at all times. They are intended for the operating company of the system, the
operating personnel and the specialists who are responsible for the transport, assembly, installation,
operation, maintenance, cleaning, disassembly and disposal.
The Pfeuffer GmbH has prepared and reviewed these Operating Instructions with the greatest care.
However, no guarantee is made for its completeness or accuracy.
Subject to technical modifications.

Table of contents
Revision 8.2 | Operating instructions Friabilimeter
3 | 48
1Introduction ............................................................................................................................. 5
Designated use.................................................................................................................................... 5
EC/EU Declaration of Conformity ....................................................................................................... 6
Structural features of the danger notes ............................................................................................. 7
Pictograms in the operating instructions............................................................................................ 7
Abbreviations in electrical engineering .............................................................................................. 8
Identification....................................................................................................................................... 8
2Safety....................................................................................................................................... 8
Built-in safety systems ........................................................................................................................ 8
Electrical connections ....................................................................................................................... 11
Operating and danger areas on the FRIABILIMETER......................................................................... 11
Operating and maintenance personnel ............................................................................................ 11
Safety measures (to be carried out by the owner) ........................................................................... 12
General safety notes ......................................................................................................................... 13
Safety tests........................................................................................................................................ 13
Residual dangers in connection with the FRIABILIMETER ................................................................ 13
Switch-off procedure ........................................................................................................................ 13
3Technical data ........................................................................................................................ 14
Dimensions and weight..................................................................................................................... 14
Power supply..................................................................................................................................... 14
General data...................................................................................................................................... 14
4Delivery, transport and storage............................................................................................... 15
Scope of delivery............................................................................................................................... 15
Transport and packaging................................................................................................................... 15
Intermediate storage ........................................................................................................................ 15
Unpacking and packing ..................................................................................................................... 15
5Installation and commissioning ............................................................................................... 17
6Function ................................................................................................................................. 18
Overview ........................................................................................................................................... 18
Sequence of functions....................................................................................................................... 18
7Operation............................................................................................................................... 19
Control elements............................................................................................................................... 19
7.1.1 Main switch ON/OFF.............................................................................................................. 19
7.1.2 Pull handle ............................................................................................................................. 19
7.1.3 Setscrew................................................................................................................................. 19
7.1.4 Start key................................................................................................................................. 19
7.1.5 Operating hours counter ....................................................................................................... 19

Table of contents
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Operating instructions Friabilimeter | Revision 8.2
Preparations...................................................................................................................................... 20
Weighing out the sample .................................................................................................................. 21
Filling the sample .............................................................................................................................. 21
Switching on the FRIABILIMETER ...................................................................................................... 21
Emptying the sample......................................................................................................................... 23
Evaluation.......................................................................................................................................... 24
7.7.1 Friability M ............................................................................................................................. 24
7.7.2 Whole hyaline (whole grains) WH ......................................................................................... 24
7.7.3 Part hyaline (partially non-comminuted grains) PH............................................................... 25
Switching off the FRIABILIMETER...................................................................................................... 25
8Checking the device settings ................................................................................................... 26
Timer runtime ................................................................................................................................... 26
Abrasion on the pressure roll............................................................................................................ 26
Abrasion on the drive rolls ................................................................................................................ 27
Sieve drum......................................................................................................................................... 27
Precise adjustment using the setscrew............................................................................................. 28
Adjustment by moving the detent plate........................................................................................... 29
9Maintenance and cleaning...................................................................................................... 30
Cleaning............................................................................................................................................. 30
Maintenance ..................................................................................................................................... 31
Inspection interval and function test ................................................................................................ 31
Tools .................................................................................................................................................. 32
Renewing the pressure roll ............................................................................................................... 33
Working inside the housing............................................................................................................... 34
9.6.1 Renewing drive rolls............................................................................................................... 35
9.6.2 Renewing the timer ............................................................................................................... 38
9.6.3 Renewing the motor .............................................................................................................. 41
Checks ............................................................................................................................................... 42
10 Malfunctions – causes and rectification................................................................................... 43
Renewing the internal fuse ............................................................................................................... 45
11 Spare parts and accessories .................................................................................................... 46
12 Emergency ............................................................................................................................. 47
13 Dismantling and disposal ........................................................................................................ 47
14 Literature ............................................................................................................................... 47
15 Test log .................................................................................................................................. 48

Introduction
Revision 8.2 | Operating instructions Friabilimeter
5 | 48
1Introduction
Designated use
The FRIABILIMETER is used for determining the friability and whole hyaline of barley malt grains directly
after kilning. It mechanically separates a malt sample into hard (glassy) and friable (easily crushed)
constituents. The FRIABILIMETER consists of a mechanical abrading device with an electric motor and an
electronic timer.
The internationally recognized method is based on the research results of Prof. Lucien Chapon. This
method detects differing malt qualities. The brewery can measure the malt quality immediately on
delivery and use the information to achieve consistent malt blends.
The friability is determined according to international methods, e.g. EBC1method 4.15, MEBAK24.1.3.6
and ASBC 3Malt-12. Pfeuffer GmbH has cooperated with the EBC analysis committee to establish a
FRIABILIMETER network which determines a binding reference friability value.
The FRIABILIMETER is configured as a portable device with a mains plug.
Private use of the FRIABILIMETER is not allowed.
NOTICE
The FRIABILIMETER is exclusively intended for the indicated purpose.
Any other use beyond this definition, or conversion of the FRIABILIMETER without written consultation
with Pfeuffer
GmbH, is regarded as not in accordance with the designated use.
Pfeuffer
GmbH will not be liable for any damage resulting from this! The risk is the responsibility of the
owner alone.
The FRIABILIMETER is only allowed to be taken into operation if it can be ensured that al
l safety devices
are functioning.
The following are prohibited
crushing firm, solid objects made of metal, stone, concrete or other foreign bodies!
filling liquid and sticky products!
Experience to date shows that the FRIABILIMETER is
unsuitable for wheat malts!
The samples to be used in accordance with the designated use of the FRIABILIMETER are obtained by
the owner.
Correct treatment of these materials and the associated risks are exclusively the responsibility of the
owner.
The owner must provide inform
ation about dangers and disposal.
The designated use also includes complying with the operating instructions as well as the maintenance
and servicing conditions as defined in these operating instructions.
These operating instructions do not release the owner from its responsibility to develop and apply, or
have applied, health and/or safety regulations appropriate for the requirements of the overall system,
and to monitor compliance with the same.
1European Brewers' Convention
2Central European Brewing Analysis Commission
3American Society of Brewing Chemists

Introduction
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Operating instructions Friabilimeter | Revision 8.2
EC/EU Declaration of Conformity
EC/EU Declaration of Conformity
In accordance with the EC/EU Directives:
-Machinery 2006/42/EC
-Electromagnetic Compatibility (EMC) 2014/30/EU
-Restriction of the use of certain hazardous substances in electrical and electronic equipment
(RoHS) 2011/65/EU
Manufacturer:
Pfeuffer GmbH Phone: [phone]
Flugplatzstraße 70 [email protected]
97318 Kitzingen www.pfeuffer.com
GERMANY
The manufacturer has sole responsibility for issuing this Declaration of Conformity.
Person authorized to compile the technical documents: Lothar Pfeuffer, General Manager
Product: Friabilimeter malt friability measuring instrument
Serial number: ______________________________
The aforementioned product complies with the requirements of the following harmonized standards:
DIN EN ISO 12100:2010
DIN EN 60204-1:2006
DIN EN 61010-1:2011
DIN EN 61000-6-2:2006
DIN EN 61000-6-3:2007
DIN EN 61326-1:2013
EN IEC 63000:2018
Any modification to the FRIABILIMETER not agreed with us shall result in this declaration becoming null
and void.
Kitzingen, __________________________ ___________________________________
Lothar Pfeuffer, General Manager

Introduction
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7 | 48
Structural features of the danger notes
The operating instructions from Pfeuffer GmbH contain instructions that you must comply with for your
personal safety as well as to avoid damage to property. The instructions for your personal safety are
highlighted by a warning triangle. Comply with the following categories of danger notes and explanations
of symbols:
Pictogram
SIGNAL WORD
Type of danger and its source
Possible consequence of failure to comply
Measure to guard against the danger.
DANGER
This is a warning about a highly dangerous situation that will lead to serious or fatal
injuries.
WARNING
This is a warning about a dangerous situation that may result in serious or fatal injuries.
CAUTION
This is a warning of a possibly dangerous situation that will lead to slight or moderate
injuries.
NOTICE
This is a warning about harmful situations for the product and/or environment.
Pictograms in the operating instructions
Notes of particular
importance and/or
additional information
Warning
Comply with the operating
instructions
Warning of electrical voltage
Pull out mains plug Warning of hand injuries
Protective earth connection
Recycling marking –
Supply refuse for recycling
Do not reach in
Disposal with the household garbage
is forbidden!

Safety
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Operating instructions Friabilimeter | Revision 8.2
Abbreviations in electrical engineering
Color abbreviations for the individual strands (conductors) of a cable according to DIN IEC 60757:
Color
Color abbreviations
Color
Color abbreviations
Black
BK
Violet
VT
Brown
BN
Gray
GY
Red
RD
White
WH
Orange
OG
Pink
PK
Yellow
YE
Turquoise
TQ
Green
GN
Green-yellow
GNYE
Blue
BU
Conductor designations according to DIN VDE 0293-308:
L
Live conductor, phase (outer conductor)
Color abbreviations
L1
Outer conductor 1
BN
L2
Outer conductor 2
BK
L3
Outer conductor 3
GY
N
Neutral conductor
BU
PE
Protective earth conductor
GNYE
Identification
Sample Pfeuffer GmbH type plate:
Pfeuffer GmbH Tel. [phone]
Flugplatzstraße 70 [e-mail]
97318 Kitzingen www.pfeuffer.com
Friabilimeter
S/N 00000000
Baujahr/YOM 0000
Spannung/Voltage 0000
Leistung/Power 0000
Sicherung/Fuse 0000 Made in Germany
The information in these operating
instructions applies exclusively to the
device with the type designation
indicated on the title sheet.
The type plate with the type
designation can be found on the side of
the machine housing (rear right).
It is important for all questions to
specify the c
orrect type designation,
serial number and year of
manufacture.
Only in this way will
rapid processing be possible.
2Safety
NOTICE
It is strictly prohibited to deactivate the safety devices or modify their mode of effect
.
Built-in safety systems
The built-in safety systems must be checked at regular intervals with the corresponding test methods, see
the following table:
Test intervals
Test methods
d= Daily
w= Weekly
m= Monthly
¼ y = Every three months
½ y = Every six months
y= Yearly
V= Visual check
F= Function check
M= Measurement

Safety
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9 | 48
Mains disconnector in a portable device
Test
The main switch ON/OFF is the mains disconnector, and also serves as the
EMERGENCY OFF function. It is located on the top of the device.
Intervall
Method
y
F
Figure 1: Main switch ON/OFF
Item
Designation
1
Main switch ON/OFF
The connection for the mains cable (power connector IEC 60320 C14) is located at the rear.
NOTICE
Detachable mains cables must not be
replaced by inadequately dimensioned mains cables. Only the
specified mains cables may be used!
In an emergency, switch off the FRIABILIMETER using the main switch, position OFF.
Disconnect the mains cable from the electrical power supply, or pull out the power
coupling (IEC 60320 C13).
Secure the mains cable appropriately against unauthorized reconnection by placing it
where it can be monitored continuously.
Ensure that the mains cable is never a tripping hazard or that someone can become
caught or step on it.
Electrical connections, see chapter 2.2.
Arrange the plug/socket combination at the place of installation so that it can be observed
clearly and reached quickly in an emergency.
1

Safety
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Operating instructions Friabilimeter | Revision 8.2
Protective covers
Test
The FRIABILIMETER is protected during operation by its complete housing and
the front hood to prevent reaching into the machine.
Interval
Method
m
V
CAUTION
Danger of crushing! Finger injuries!
During operation, do not place your fingers
into the filling funnel.
into the working area of the sieve drum from below.
NOTICE
To avoid damage:
Make sure that no objects are lying on the device which could drop into the filling funnel!
Do not insert any long, pointed objects into the filling funnel or into the working area of the sieve
drum from below!
Figure 2: Protective covers
Test
In the front hood, there is a blue magnet (see Figure 3) which interacts with
the reed switch inside the housing.
Interval
Method
m
V
NOTICE
The
FRIABILIMETER cannot be taken into operation without the front hood!
The motor will stop immediately if the front hood is removed during operation!
If the LED "Operation" lights up red, the front
hood has not been put on, or not put on correctly.
2
1
Item
Designation
1
Front hood
2
Housing, complete

Safety
Revision 8.2 | Operating instructions Friabilimeter
11 | 48
Figure 3: Safety device (blue magnet) for front hood
Electrical connections
The FRIABILIMETER must only be operated with the specified voltages. The fuse must always be replaced
with identically specified values, see chapter 3 and the specifications on the type plate.
The device is in protection class I, and may only be connected to a socket which has been
grounded in accordance with regulations with a ground wire. The instrument may only be
operated on a power supply that is protected by an RCCB (Residual Current operated Circuit
Breaker).
Operating and danger areas on the FRIABILIMETER
Operating area
Make sure the installation height is sufficient (according to the stature of the operating personnel). A
suitable base (e.g. table) is required for this.
Danger area
The entire area one meter around the FRIABILIMETER is a danger area during maintenance and repair
work. Keep the area around the FRIABILIMETER clear of objects.
Operating and maintenance personnel
Operating and maintenance personnel are people who are responsible for transport, installation, setup,
operation and cleaning of the FRIABILIMETER, and for eliminating malfunctions.
1. The FRIABILIMETER is only allowed to be operated by authorized and instructed people.
2. The responsibilities for operating the FRIABILIMETER must be clearly defined and complied with so
that no unclear competencies arise with regard to the aspect of safety.
3. The switch-off procedures specified in the operating instructions must be complied with during all
work (operation, maintenance, repair, etc.), see chapter 2.9.
4. The operator must refrain from any working method that impairs safety on the FRIABILIMETER.
5. The operator must ensure that only authorized people work on the FRIABILIMETER.
6. The owner is obliged to report immediately to the owner any changes that take place on the
FRIABILIMETER which impair safety.
7. The operating personnel must be provided by the owner with appropriate protective equipment in
accordance with legal requirements and the material to be processed.
8. The owner must issue regular instructions regarding the use of personal protective equipment, and
must check such equipment is being used.

Safety
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Operating instructions Friabilimeter | Revision 8.2
Safety measures (to be carried out by the owner)
It should be noted that the owner is responsible for the following aspects with regard to the operating
and maintenance personnel
Providing instruction in the protective devices for the FRIABILIMETER
Monitoring compliance with the safety measures.
The frequency of the function tests described in chapter 9.3 must be complied with.
The work described in these operating instructions is configured in such a way that
it is explained in the chapters Function and Operation for the operating personnel
it is explained in the chapters Delivery, Transport and storage, Installation and commissioning,
Maintenance and cleaning, Malfunctions – causes and rectification and Dismantling and disposal for
a specialist operator.
The chapters Delivery, Transport and storage, Installation and commissioning, Maintenance and cleaning,
Malfunctions – causes and rectification and Dismantling and disposal are only intended for specialist
operators. Work described in this chapter is only to be carried out by specialist operators.
Instructed person
A person who has been instructed and, if necessary, trained by a specialist operator regarding the tasks
assigned to him/her and the possible dangers in the event of incorrect conduct, and who has also been
instructed regarding the necessary protective devices and protective measures.
Specialist operator
An individual who, due to his/her relevant specialist training and/or experience, is capable of recognizing
risks and avoiding dangers that may occur during use of the product.
(Definition according to DIN EN 82079-1:2013-06)
Qualified electrician
Person who is in a position to carry out work on electrical systems and independently recognize potential
dangers on the basis of their technical training, knowledge and experience and knowledge of the relevant
standards and provisions. Qualified electricians are specially trained for the working environment in which
they work and have knowledge of the relevant standards and provisions.
Obligations on the owner
In the European Economic Area (EEA), national implementation of the framework directive
89/391/EEC and corresponding individual directives, in particular the directive 2009/104/EC
concerning the minimum health and safety requirements for the use of work equipment by
workers at work, as amended, are to be observed and adhered to.
In addition, he/she must comply with the local legal requirements on:
Safety of personnel (accident prevention regulations)
Accident prevention regulation DGUV 4Regulation 3 (previously BGV A 3) "Electrical systems and
equipment"
Safety of work equipment (protective equipment and maintenance)
The permissible noise load, depending on the location and the time of day (in Germany, TRLV5apply)
Product and material disposal (waste legislation)
Cleaning (cleaning agents and disposal)
Hazardous substances (in Germany, TRGS6555 apply)
Environmental protection regulations.
4DGUV = Association of German statutory insurance
5TRLV = Technical rule for the noise and vibration occupational health and safety ordinance
6TRGS = Technical rule for hazardous substances

Safety
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13 | 48
General safety notes
The safety equipment and safety notes described in these operating instructions must be
complied with.
1.
Disconnect the FRIABILIMETER from the electrical power supply if there are
malfunctions.
2. Disconnect the FRIABILIMETER from the electrical power supply before cleaning work.
3. Do not allow the FRIABILIMETER to get wet during transport, storage, cleaning and
operation.
4. Make sure that the FRIABILIMETER is only operated when in correct working order.
5. Never touch the mains cable with moist hands.
6. Only use genuine spare parts and accessories.
Safety tests
Pfeuffer GmbH carried out the following safety tests at the factory:
Testing and checking according to DIN EN 60204-1:
•Check that the electrical equipment is in compliance with the technical documentation.
•Continuous connection of the protective earth system
•Insulation resistance tests
•Voltage tests
•Protection against residual voltages
•Function tests
The functions of the electrical equipment, in particular those relating to safety and protective measures,
have been tested.
Residual dangers in connection with the FRIABILIMETER
During all work on electrically operated components, pay attention to dangers from electrical current.
Switch-off procedure
DANGER
Touching live parts can be fatal!
It is essential to comply with the following switch-
off procedure prior to cleaning,
maintenance or repair work (only by specialist personnel):
Empty the FRIABILIMETER.
Switch off the FRIABILIMETER at the main switch position OFF.

Disconnect the mains cable from the electrical power supply, or pull out the
IEC 60320 C13 power coupling.
The mains cable must be able to be kept under the direct supervision of the person in the danger
area.
During cleaning, make sure that no water, steam or dust can penetrate the electronics area.

Technical data
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Operating instructions Friabilimeter | Revision 8.2
3Technical data
FRIABILIMETER
Malt friability measuring instrument
Sample amount
50 ±0.01 g
Product
Barley malt
Measuring time
Timer 8 minutes
Dimensions and weight
Height
400 mm
Width
300 mm
Length
270 mm
Weight
12 kg
Power supply
Operating voltage/frequency
230 V ~50 Hz
Power consumption
70 VA
Number of phases
1-ph / PE
Protective earth conductor
PE (yellow/green) in the mains cable
Internal fuse
315 mA slow-blow glass microfuse 5x20 mm
Mains cable
With removable supply cable (power connector
cable IEC 60320 C13/C14); 10 A, 250 V
Installation regulations
Configured according to VDE7– Protection class I
/ protective earth
General data
Ambient temperature storage and transport
-10 °C to +60 °C
Ambient temperature measurement
+15 °C to +40 °C
Atmospheric humidity
20 % - 80 % non-condensing
Installation condition
Level table surface without vibration
7VDE = Association for Electrical, Electronic & Information Technologies (Germany)

Delivery, transport and storage
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15 | 48
4Delivery, transport and storage
The Delivery, transport and storage chapter is only intended for specialist operators.
Scope of delivery
The standard scope of delivery to the owner comprises: FRIABILIMETER malt friability measuring
instrument including sieve drum and front hood, mains cable with removable connection
(IEC 60320 C13/C14 power connector cable), measuring caliper, can of Pfeuffer test malt 400 g, flat-blade
screwdrivers 3x40 mm and 2x40 mm, plastic funnel, collecting vessel, small and large cleaning brushes
and operating instructions.
Transport and packaging
Systems, machines and devices from Pfeuffer GmbH are carefully tested and packaged prior to dispatch,
however it is not possible to exclude the risk of damage during transport.
Incoming check
Check for completeness with reference to the delivery note.
In case of damage
Check the delivery for damage (visual inspection).
In case of complaints
If the delivery suffered damage in transit:
Keep the packaging (to allow it to be checked subsequently by the forwarding company, or for
sending back).
Immediately inform the supplier or Pfeuffer GmbH.
Intermediate storage
The freight packaging of the FRIABILIMETER and the accessory/replacement parts is configured for a
storage duration of up to six months from delivery.
Do not place any heavy objects on the packaging.
Storage conditions
Enclosed, dry room with a room temperature between min. -10 °C and max. +60 °C.
Unpacking and packing
Open the packaging to avoid damage to the housing and other components.
Figure 4: Unpacking I
Remove the sieve drum, the operating instructions and
the remainder of the accessories as stated on the delivery
note.

Delivery, transport and storage
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Operating instructions Friabilimeter | Revision 8.2
Figure 5: Unpacking II
Remove the cardboard box.
Figure 6: Unpacking III
Open the cardboard box inside.
Figure 7: Unpacking IV
Remove the PE foam padding.
Figure 8: Unpacking V
Remove the front hood and the FRIABILIMETER.
Do not lift out the FRIABILIMETER by its drive and
pressure roll.
Note that the weight is approx. 12 kg.
Move the FRIABILIMETER to the installation location, paying attention to the setup instructions in
chapter 5.
Keep the original packaging.
Packaging for return delivery
If possible, use the original packaging and the original packaging material. If neither is available any
longer, request new packaging from Pfeuffer GmbH.

Installation and commissioning
Revision 8.2 | Operating instructions Friabilimeter
17 | 48
WARNING
Risk of suffocation
Packaging materials (e.g. film, polystyrene, cardboard boxes) can be dangerous to children.
Keep packaging material away from children.
Do not leave packaging material lying around carelessly.
Dispose of packaging material in an environmentally friendly way.
5Installation and commissioning
The Installation and commissioning chapter is only intended for specialist operators.
Installation
Carefully unpack the FRIABILIMETER (see chapter 4.4).
Place the FRIABILIMETER horizontally on a solid table with a smooth, clean surface.
Make sure there is an adequate distance to all sides so that no heat buildup can occur.
Do not set up the FRIABILIMETER close to apparatus/devices that are sensitive to dust.
Avoid exposure to direct sunlight and extreme ambient conditions.
Make sure that the installation height is ergonomic according to the stature of the operating
personnel.
Connect the supplied mains cable to the FRIABILIMETER using the connector (power connector
cable IEC 60320 C13/C14).
Connect the plug of the mains cable to a suitably earthed socked with protective earth
conductor.
Take the FRIABILIMETER into operation according to the instructions in chapter 7.

Function
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Operating instructions Friabilimeter | Revision 8.2
6Function
Overview
Figure 9: Overview
Item
Designation
Item
Designation
1
Main switch ON/OFF
8
Pull handle
2
Setscrew
9
Pressure roll
3
Start key
10
Drive rolls
4
Sticker: Timer 8 minutes
11
Sieve drum
5
Filler opening
12
Cleaning brush
6
Front hood
13
Collecting tray
7
Operating hours counter
Sequence of functions
The FRIABILIMETER is a friability measuring instrument for barley malt. The friability is measured using a
mechanical abrasion process.
Weigh out a cleaned sample of 50 g on a balance with 0.01 g accuracy, and fill the sample. Pull the pull
handle and engage it in the bottom position. Press the start key. The pressure roll presses the grains of
barley malt against the rotating sieve drum with a constant spring pressure. The friable constituents fall
through the wire mesh. Glassy grains and hard fragments remain in the sieve drum. The FRIABILIMETER
switches off automatically after eight minutes. The remaining constituents in the sieve drum are weighed
back and this information is used for calculating the friability value out of one hundred.
For precise information about operation, refer to chapter 7.
12 3 4 5 6 7 8
9
10
11
12
13

Operation
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19 | 48
7Operation
The FRIABILIMETER is only allowed to be operated by personnel who have been qualified
and trained in its operation.
Control elements
Figure 10: FRIABILIMETER control elements
7.1.1 Main switch ON/OFF
The main switch ON/OFF switches the FRIABILIMETER on and off. After switching on, the "On" LED lights
up green.
7.1.2 Pull handle
The pull handle applies pressure to the pressure roll, or removes the pressure.
7.1.3 Setscrew
The setscrew is required for precise adjustment of the FRIABILIMETER, see chapter 8.5.
7.1.4 Start key
The start key starts the investigation. The green "On" LED goes out and the "Operation" LED flashes green.
The FRIABILIMETER switches off automatically after eight minutes have elapsed.
If the LED "Operation" lights up red, the front hood has not been put on, or not put on correctly.
7.1.5 Operating hours counter
The FRIABILIMETER is equipped as standard with an operating hours counter to provide a clear overview
of the necessary maintenance work.
Devices of an older design can be retrofitted by Pfeuffer GmbH.
3
2
5 6 7
4
1
Item
Designation
1
Operating hours counter
2
Pull handle
3
Setscrew
4
Main switch ON/OFF
5
"Operation" LED
6
"On" LED
7
Start key

Operation
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Operating instructions Friabilimeter | Revision 8.2
Investigations at the Pfeuffer GmbH factory have shown that the FRIABILIMETER must be checked
depending on the malt quality being investigated.
To do this, carry out an investigation with the test malt and make a note of the counter reading after
each check (see master copy on last page).
Preparations
Pfeuffer GmbH recommends a "warm-up" of the device after a longer standstill (from 4
hours) or after switching on:
Perform two investigations and discard the results.
NOTICE
Experience to date shows that the FRIABILIMETER is
unsuitable for wheat malts!
Select a
representative barley malt sample for the measurement.
Foreign bodies
must be removed prior to the investigation!
Allow the samples to acclimatize to room temperature!
It is necessary to have a
sample quantity of 50 ±0.01 g to achieve an accurate result.
The moisture content of the sample should be between 3.5
and 5%. Other values will influence the result.
A high husk content or husks which have absorbed water can lead to deviations in the results.
Malts from particular winter barleys can lead to different results because of their high proportion of husk
(Analytica
-EBC).
The less
homogeneous the malts, the greater the divergence in results.
Malt samples must be stored in an air
-tight container with little or no air inclusion. Fill and seal the
container immediately after taking out the sample.
It is necessary to calibrate the FRIAB
ILIMETER in relation to a standard malt with a known friability. If the
friability result differs from the accepted value by more than r
95 (of an internal test malt) or more than
R
95 (of an external test malt), the FRIABILIMETER will have to be calibrated and checked regularly, see
chapter
8.
CAUTION
Dust warning
Due to the nature of the samples, visible cereal dust will be released into the surroundings
during operation.
Check whether inhaling large quantities might lead to irritation or illnesses of the
respiratory passages, and if so then take appropriate measures.