Operating Instructions - AS200 Analytical Sieve Shakers
basic
digit
Retsch GmbH , 42781 Haan , Retsch-Allee 1-5, Germany 31.07.2012 0007
Information on these operating instructions
The present operating instructions for the model AS200
analytical sieve shaker provide all the necessary
information on the topics mentioned in the table of
contents.
These instructions will guide the reader to each topic
necessary for safe use of the AS200, in accordance with
the purpose for which the unit is intended. Familiarity
with the applicable chapters is essential to safe and
proper use of the equipment.
The present technical documentation has been
designed for use both as a learning tool and a reference
source. Each of the chapters represents a selfcontained unit.
These operating instructions do not contain any
information on repairs. If repairs should ever become
necessary, kindly contact your supplier or the Retsch
GmbH.
31.07.2012 Retsch GmbH 2
Information on these operating instructions .............. 2
Safety ............................................ 4
Safety notes ................................................. 4
Warnings ................................................... 5
Repairs .................................................... 5
Confirmation ................................................ 5
Technical specifications .............................. 6
Utilization in accordance with the intended purpose .................... 6
Emissions .................................................. 6
Electrical protection class ....................................... 6
Equipment dimensions ......................................... 6
Footprint ................................................... 6
Shipping and installation ............................. 7
Packing .................................................... 7
Shipping ................................................... 7
Intermediate storage .......................................... 7
Requirements for the installation site ............................... 7
Installation / Shipping nuts ...................................... 7
Reusing the shipping nuts ....................................... 8
Electrical connection .......................................... 8
Operation ......................................... 9
Control elements and their use ................................... 9
The operating controls and their functions .......................... 10
Summary table .............................................. 10
The operating controls and their functions .......................... 11
Summary table, part 2 ........................................ 11
Installing and fixing the analytical sieves ........................... 12
Operation for the AS200 digit ................................... 14
Switching on and off .......................................... 14
Start - Interrupt - Stop ......................................... 14
Intermittent - Continuous operation ............................... 15
Vibration height ............................................. 15
Setting the time ............................................. 16
Operation for the AS200 basic .................................. 17
Switching on and off .......................................... 17
Start - Stop ................................................ 17
Vibration height ............................................. 17
Setting the time ............................................. 18
Replacing the fuses – All AS200 models ........................... 18
Working instructions ............................... 19
Supplementary mass ......................................... 19
Sieving aids ................................................ 19
Retsch analytical sieves ....................................... 19
Quantity of product to be sieved ................................. 20
Distribution of the sieved product ................................ 21
Amplitudes as funktion of loaded weight ........................... 22
Explanations of the loading charts ..................... 24
Example 1 : ................................................ 24
Example 2 : ................................................ 25
Example 3 : ................................................ 25
Wet sieving ....................................... 26
Required accessories ......................................... 26
Preparations ............................................... 26
Operation.................................................. 26
General .......................................... 28
Accessories ................................................ 28
Cleaning .................................................. 29
Maintenance ............................................... 29
Copyright .................................................. 29
Modifications ............................................... 29
Safety regulations for the AS200 ................................. 30
Extract from the individual chapters ............................... 30
31.07.2012 Retsch GmbH 3
Safety
Target group: Everyone who deals with the
machine in any manner
whatsoever.
The AS200 is a modern, high-performance product
manufactured by the Retsch GmbH; it incorporates the
latest technology. It is entirely safe in operation when
used for the intended purpose and in accordance with
the present technical documentation.
Safety notes
You, as the owner/operator, must ensure that persons
who are entrusted with the operation of the AS200.
* have read and understood all the regulations included in the
chapter on safety,
* have made themselves familiar, prior to starting work, with all
the operating instructions and regulations for the target groups
relevant to them,
* have complete, immediate and unrestricted access to the
technical documentation for this machine,
* new personnel shall have been made familiar with safe and
appropriate use of the AS200 before starting work with the
machine, through instruction by a qualified person and/or with
the help of the present technical documentation.
* Incorrect operation can result in injuries to persons and
damage to property. You bear responsibility for your own
safety and for that of your co-workers.
* Ensure that no unauthorized persons have access to the
AS200.
For your own protection, have your co-workers certify in
writing the fact that they have received instruction in the
operation of the AS200. A suggestion for a printed form
which can be used for this purpose will be found at the
end of the chapter on safety.
We reject herewith any and all claims in conjunction with
personal injury or property damage resulting from failure
to observe the following safety instructions.
31.07.2012 Retsch GmbH 4
Warnings
!
Personal injury
Property damage
Local Retsch representative
Your supplier
The Retsch GmbH
_____________________________________
_____________________________________
_____________________________________
_____________________________________
_____________________________________
The following symbols are used to identify specific
hazard potentials:
Repairs
These operating instructions do not include any repair
instructions. In the interest of your own safety, have
repairs made only by the Retsch GmbH or an authorized
representative (service technician).
In this case, please notify the following:
Your address for service:
Confirmation
I have familiarized myself with the foreword to the operating in-
_______________________________________
_______________________________________
structions and the chapter on safety
Owner/operator signature
Service technician's signature
31.07.2012 Retsch GmbH 5
Technical specifications
Do not make any modifications to the machine and use only
RETSCH approved spares and accessories.
Failure to comply will invalidate the CE declaration and
guarantee.
Machine designation: AS200
Utilization in accordance with the intended
purpose
The AS200 is suitable for both dry and wet sieving of
free-flowing, dispersed products where the input product
exhibits grain size of up to a maximum of 25 mm.
Emissions
Characteristic noise values :
Noise measurement according to DIN 45635-31-01-KL3
The characteristic noise values are determined primarily
by the set amplitude value, the number of test sieves
and the characteristics of the sieving material.
Example 1 :
Sound power level: LWA = 71 dB(A)
Workplace-related emission L
Operating conditions:
Sample material: quartz, grain size < 1 mm, 5 sieves
vibration height : 1,5 mm
Example 2 :
Sound power level: LWA = 76 dB(A)
Workplace-related emission L
Operating conditions:
Sample material: quartz, grain size < 1 mm, 5 sieves
vibration height : 3 mm
= 63 dB(A)
pAeq
= 67 dB(A)
pAeq
Electromagnetic compatibility (EMC)
Strong electromagnetic interference fields, such as highpower radio transmitters, can have an adverse influence
on amplitude control in the AS200 model.
Once the source of interference is eliminated, the
AS200 will return to normal operation (self-correction).
Electrical protection class
IP54 and IP20 in the area of the sieve carrier passage.
Equipment dimensions
Height:: up to about 800 mm
Width: 400 mm , Depth: 400 mm
Weight: approx. 40 kg without sieve stack and
without sieve clamping device
Footprint
400 mm x 400 mm; no safety clearances required
31.07.2012 Retsch GmbH 6
Shipping and installation
Please retain the packaging for the duration of the
warranty since, in case of a claim, returning in unsuitable
packaging can jeopadize your warranty entitlements
During transportation the AS200 may not be subjected to
impact or vibration; it must not be thrown. The electronic
and mechanical components could otherwise be
damaged.
In case of wide temperature fluctuations (during shipment
by air, for instance) the AS200 will have to be protected
against condensation; the electronic components could
otherwise be damaged.
When the ambient temperature exceeds or falls below that
specified, the electronic and mechanical components may be
damaged, and performance data changed to an unknown
extent.
At higher humidity, the electronic and mechanical components
may be damaged, and performance data changed to an
unknown extent.
Target group: Owner, freight forwarder, operator
Packing
The type of packaging used has been selected in
accordance with the shipping mode. It complies with
generally applicable packaging guidelines.
Shipping
Temperature fluctuations
Intermediate storage
Also ensure that the AS200 is stored in a dry place.
Requirements for the installation site
Ambient temperature
5°C to 40°C
Humidity:
Maximum relative humidity 80% at temperatures up to 31°C;
linear decline down to 50% relative humidity at 40°C.
Installation site – altitude:
max. 2000 m above mean sea level
Installation / Shipping nuts
31.07.2012 Retsch GmbH 7
SM
Set up the AS200 only on a stable laboratory bench to avoid unpleasant transmission of vibrations.
Loosen the hexagonal nuts SM using an open-ended
spanner until the sieve plate moves freely
Unscrew the wing screws A (shipping nuts) with hexagonal
nuts.
Mount the appropriate sieve clamping device (See the
chapter on operation for instructions)
Keep the wing screws A with hexagonal nuts (shipping nuts)
in a safe place for later transportation.
Reusing the shipping nuts
Screw the hexagonal nuts fully onto the wing screws
Screw the wing screws through the sieve plate into the
housing
Twist the hexagonal nuts downwards and tighten until the
sieve plate can no longer move
Operation with these shipping nuts in place, or shipping without
the these nuts installed, could cause damage to mechanical
components.
Electrical connection
Failure to observe the values on the data plate can cause
damage to either the electrical or the mechanical components or both.
* Refer to the data plate for information on the voltage and
frequency at which the AS200 is to be operated.
* Ensure that the values shown there correspond to those for
the local power supply.
* Use the supplied power cord to connect the AS200 to the
power supply.
* When connecting the power cord to the power source, be sure
that the supply circuit is fused in accordance with local codes.
31.07.2012 Retsch GmbH 8
Operation
Control elements and their use
Schematic view of the operating controls:
31.07.2012 Retsch GmbH 9
The operating controls and their functions
Element
AS200 model
Description
Function
A
all models
Shipping stabilization; wing
screw with nut and washer
Protects the unit during transportation;
must without fail be removed before use.
AA
all models
Socket
Attachment point for the power cord.
B
Accessories
Sieve fixing cover, standard
Covers the upper analytical sieve; in
conjunction with the retainer nuts D or the
quick-action clamps G it secures the sieve
stack.
BB
all models
Fuse holder
Accepts two glass-tube fuses, 4 A, slowblow
C
Accessory
Sieve fixing cover, economy
Covers the upper analytical sieve; in
conjunction with the retainer nuts D it
secures the sieve stack.
D
Accessory
standard and economy fixing
nuts
In conjunction with the B or C sieve fixing
cover, they secure the sieve stack.
E
Accessory
standard and economy
threaded spindles
Used together with the B or C sieve fixing
cover and the nuts D, they secure the
sieve stack.
F
Accessory
Hex nuts
Locks the threaded spindles E, screwed in
place, on the sieve plate.
G
Accessory
Quick-acting clamps
Permits quick clamping and loosening of
the sieve stack in conjunction with the
sieve fixing cover B and the stationary
rods H.
H
Accessory
comfort stationary rods
Allows for quick clamping and loosening of
the sieve stack in conjunction with the
sieve fixing cover G and the sieve fixing
cover B.
I
Contained in
G
Lever, red
Pressed upwards, it releases the sieve
fixing cover B.
J
all models
ON / OFF switch
Connects and disconnects the unit to the
line power supply.
K
Contained in
G
Lever, green
When pressed repeatedly, it moves the
sieve fixing cover B downward, thus fixing
the sieve stack.
L
AS200
Display: 0.20 to 3.00 mm
Shows the vibration height (twice the
amplitude) from 0.20 to 3.00 mm.
Summary table
31.07.2012 Retsch GmbH 10
The operating controls and their functions
Element
AS200 Model
Description
Function
MN1
MN2
AS200 digit
AS200 basic
Knob to decrease or increase
vibration height, from 0.00 to
3.00 mm
Turn to the left to decrease, to the right to
increase vibration height. The scale
graduations are not absolute and are to
serve for reference only.
R1
AS200 basic
AS200 digit
Interval ON button
Left-hand LED lights
Switches the AS200 into the interval
mode. Will be disabled when the machine
is first switched on.
S1
AS200 basic
AS200 digit
Interval OFF button
Right-hand LED lights
Switches the AS200 to the continuous
operation mode.
T1
AS200 basic
AS200 digit
Display: 0 to 99 min.
Shows the sieving duration, from 1 to 99
min; two bars, indicating “infinite sieving
duration”, will be seen when the machine
is first switched on.
U1
AS200 basic
AS200 digit
Adjustment button - reduce
sieving period
Reduces the sieving period - 1 to 99 min.
UV2
AS200 basic
Knob for running time:
Reduce/increase or continuous
operation
Reduces or increases the sieving period
0 to 60 min
or sets for infinite sieving period
V1
AS200 basic
AS200 digit
Adjustment button - increase
sieving period
Increases the sieving period - 1 to 99 min.
W1
AS200 basic
AS200 digit
START button
Starts the sieving operation
Green LED lights
X1
AS200 basic
AS200 digit
STOP button
Terminates the sieving process
Press once = Pause – Pause/Display
lights and red LED lights; press the W/W1
button once to restart
Press twice = Standby – Only the red LED
lights; press the W/W1 button twice to
start
Summary table, part 2
31.07.2012 Retsch GmbH 11
Installing and fixing the analytical sieves
The AS200 is suitable for use with analytical sieves with
outside diameters of up to 215 mm.
It is possible to install up to 16 analytical sieves 25 mm
high or 8 sieves 50 mm high, plus the base pan in each
case.
A variety of clamping units and covers is available for
use with sieves from 100 to 215 mm O.D. (see the
accessories listing).
Fixing with the sieve clamping unit –
economy or standard
* Screw the threaded rods E into the sieve plate and lock with
the hex nuts F.
* Center the selected sieve stack on the sieve plate.
* Lay the economy C or standard B sieve cover on the top
sieve, around the threaded rods.
* Tilt the clamping nuts D to slide them over the stationary
threaded rod and down to the sieve cover; turn down hand
tight.
We recommend using talcum powder if the base pan
sticks to the smooth surface of the sieve carrier when
removing the sieve stack.
Shorter threaded rods (see accessories listing) are
available to secure a maximum of five analytical sieves
and a base pan; these rods are for use with the
economy and standard sieve clamping units.
Please see also the section on product distribution.
31.07.2012 Retsch GmbH 12
Fixing with the sieve clamping unit – comfort
* Screw the stationary rods H into the sieving plate
* Center the selected sieve stack on the sieve plate.
* Slide the comfort clamping cover B over the stationary rods,
pressing the red lever I upward; the green lever K remains in
the upper setting.
* Slide the clamping cover down to the top sieve.
* Press the green lever K downward several times; the red lever
I must not be moved.
* To release, use the thumb to press the red lever I upward; the
sieve cover can now be slid upward.
(Rest the index and middle fingers on the top of the housing
G).
If, after the sieving process, the red lever I proves to be
difficult to move, then the green lever K and the red
lever I are to be pressed simultaneously, briefly, to
release tension.
We recommend using talcum powder if the base pan
sticks to the smooth surface of the sieve carrier when
removing the sieve stack.
31.07.2012 Retsch GmbH 13
The main switch J is located at the left-front on the AS200; see
Fig. 8
* Turn the main switch on.
* The interval off LED lights, Fig. 9
* Two bars light in the time display, see Fig. 9
The AS200 is now ready for operation, without the interval
function, in continuous duty.
Fig. 8
Operation for the AS200 digit
Switching on and off
Start - Interrupt - Stop
Fig. 9
Start: Fig. 9
* Press the START button W1.
* The green LED above button W1 lights.
Interruption (pause function): Fig. 9
* Press the STOP button X1 once.
* The red LED above button X1 lights.
* Sieving is suspended; values remain visible in the
display.
* Press the START button W1.
* The sieving process will be resumed.
Stop (standby function): Fig. 9
* Press the STOP button X1 twice
* Red LED above button X1 lights.
* The entire display goes out.
* Activate the LED displays: press button W1 once.
* New values can now be entered.
* Press the START button W1 a second time
* The same function will be executed as with the start
function.
31.07.2012 Retsch GmbH 14
Intermittent - Continuous operation
Fig. 10
Intermittent operation is initially disabled when the
AS200 is first switched on.
Enable intermittent mode: Fig. 10
* Press the R1 button.
* The LED above button R1 lights.
Disable intermittent mode: Fig. 10
* Press the S1 button.
* The LED above button S1 lights.
Vibration height
If you desire to work with vibration heights above 2.5
mm, we recommend running the AS200 up to this value
slowly. Depending on the loading situation, resonance
(harmonic reinforcement) effects can be induced,
causing the armature and the yoke of the magnet to
make contact.
Fig. 11
Setting the vibration height (twice the
amplitude), from 0 to 3.00 mm: Fig. 11
* Turn the MN1 knob to the left to reduce the vibration
height, to the right to increase.
The values shown on the potentiometer scale are for
orientation purposes only. There is no absolute
relationship to the actual vibration height and thus this
scale cannot be used as an aid in reproducing previous
values.
Naturally, your AS200 can only achieve the vibration
heights which are within the values shown in the loading
diagram.
31.07.2012 Retsch GmbH 15
Reading the vibration height: Fig. 12
The vibration height is shown optically, on the front of
the sieve plate.
The intersection of the two lines shows the vibration
height when the machine is running.
In the illustration at the left the value is 1.8 mm.
Fig. 12
Setting the time
Fig. 13
The AS200 is set for continuous operation when it is first
switched on..
Set the time for 1 to 99 min.: Fig. 13
* Pressing the U1 button will reduce the time down to a
minimum of 1 min.
Once this value has been passed, two bars will appear,
indicating continuous operation.
* Pressing button V1 raises the time, up to 99 min.
When this value is passed, the two bars indicating continuous
operation will appear.
31.07.2012 Retsch GmbH 16
Operation for the AS200 basic
The main switch J is located at the left-front on the AS200; see
Fig. 14.
* Turn the main switch on.
* The ON LED lights, Fig. 15.
The AS200 is now ready for operation.
Fig. 14
Switching on and off
Start - Stop
Fig. 15
Start: Fig. 15
* Set knob UV2 for continuous operation .
Stop (standby function): Fig. 15
* Set knob UV2 to I.
Vibration height
If you desire to work with vibration heights above 2.5
mm, we recommend running the AS200 up to this value
slowly. Depending on the loading situation, resonance
(harmonic reinforcement) effects can be induced,
causing the armature and the yoke of the magnet to
make contact.
Setting the vibration height (twice the
amplitude), from 0 to 3.00 mm: Fig. 15
* Turn the MN2 to the left to reduce the vibration height, to
the right to increase.
The values shown on the potentiometer scale are for
orientation purposes only. There is no absolute
relationship to the actual vibration height and thus this
scale cannot be used as an aid in reproducing previous
values.
31.07.2012 Retsch GmbH 17
Reading the vibration height: Fig. 16
The vibration height is shown optically, on the front of the sieve
plate.
The intersection of the two lines shows the vibration height when
the machine is running.
In the illustration at the left the value is 1.8 mm.
Naturally, your AS200 can only achieve the vibration heights
which are within the values shown in the loading diagram.
Fig. 16
Setting the time
Fig. 17
Setting the time for 1 to 60 min.: Fig. 17
* Turn the knob UV2 to the right to set the desired running
period.
Switching on continuous operation: Fig. 17
* Turn the knob UV2 to the left to the symbol
Replacing the fuses – All AS200 models
Fig. 18
Two glass tube micro-fuses, 4 A, slow-blow (5 20
mm), will be required for all AS200 models.
Replacement: Fig. 18
* Disconnect the line power cord.
* Pull out the fuse holder BB.
31.07.2012 Retsch GmbH 18
* Replace the fuses.
* Push the fuse holder BB back into normal position.
Working instructions
Ensure that the openings in the sieve mesh are not
stretched by overloading with sieving aids as this would
have a detrimental effect on the precision of your
analytical sieve.
Target group: Laboratory technicians
Supplementary mass
The use of a supplementary mass may be required only
for 60 Hz units where, when using a small number of
analytical sieves, insufficient vibration height is attained
for your sieve analysis.
(Refer to chart on page 9.)
The auxiliary mass is mounted below the sieve stack, on
the sieve carrier plate at the AS200, and clamped at the
same time as the sieve stack.
Sieving aids
When dealing with product which is difficult to separate,
for which wet sieving is not possible (see notes in this
chapter), we recommend using sieving aids in the
individual sieve fractions. Depending on the screen size
and the vibration intensity, pearls made of agate,
rubber, china or nylon bristles and Vulkollan cubes may
be used.
Refer to the paragraph on product quantities for
information on suitable charges.
Retsch analytical sieves
Decisive for the accuracy and reliability of analytical
results is, in addition to a sieve shaker which works at
reproducible conditions, the quality of the analytical
sieves themselves.
Retsch analytical sieves are high-quality, high-value
measurement devices which may be used only for
woven and perforated sieves corresponding to the
particular standard. Following final inspection, each
screen is assigned a serial number and a quality
certificate is issued.
31.07.2012 Retsch GmbH 19
Retsch analytical sieves are available in versions
Nominal widths of the
screen openings
Material quantity in dm
3
at 200 mm diameter
8
0.500
3.15
0.300
1
0.140
0.5
0.100
0.2
0.060
0.063
0.035
0.020
0.020
complying with all the usual national and international
standards:
* Standards available:
DIN, ISO, ASTM, BS
* Available diameters:
100 mm / 150 mm / 200 mm / 203 mm (8")
* Available woven screens materials:
Woven wire screens made of stainless steel
Perforated plates made of stainless steel
Specifics will be found in the detailed brochure describing
the analytical sieves.
The stack required for sieve analysis is composed of
analytical sieves which are arranged one above the other,
with progressively larger holes toward the top, together
with the base pan.
Quantity of product to be sieved
To ensure fast separation and exact results, the quantity
of the product being examined should be matched to the
sieve diameter and the nominal size of the openings.
The specific standards for sieve analysis (e.g. DIN
22019, Part 1) provide guideline values in which the
following maximum charge quantities are
recommended:
31.07.2012 Retsch GmbH 20
Distribution of the sieved product
When carrying out sieving processes with only one to
three sieves, we recommend using the short rods.
Overly long rods, extending above the stack, will interfere
with distribution of the product due to their intrinsic resonance.
Even in procedures with only a single sieve, the AS200
will provide largely uniform distribution of the product
across the sieve screen. Depending on the vibration
height which is selected, the product will be moved
slowly in a circular direction.
Proper leveling of the AS200 is an important factor here.
Leveling can be corrected by screwing the feet CC in or
out as required. Fig. 19
Fig. 19
It is not necessary to lock the feet in position once
adjustment has been made.
31.07.2012 Retsch GmbH 21
Amplitudes as funktion of loaded weight
Please refer to the following charts
Tolerances are 5% of the mass of the sieve stack
These charts are to be understood as aids in orientation
and are referenced to the rated voltage as indicated on
the data plate. Fluctuations in line voltage and deviations from the rating will result in higher tolerances.
Chart for the AS200 digit
at 230 V, 50 Hz
Vibration amplitudes from 0 to 3.0 mm
Sieve stack masses = Sieve + collector bottom, without
product being handled from 560 to 6250 grams
Solid line = AS200 with standard / economy sieve
clamping unit
Line with circles = AS200 with “comfort” sieve clamping unit
Chart for the AS200 basic
at 230 V, 50 Hz with clamping unit “economy“
Vibration amplitudes from 0 to 3.0 mm
Sieve stack masses = Sieve + collector bottom, without
product being handled from 560 to 6250 grams
grams
Subject to technical modification without prior notice
31.07.2012 Retsch GmbH 22
grams
Chart for the AS200 digit and basic
at 100 V, 50 Hz
Vibration amplitudes from 0 to 3.0 mm
Sieve stack masses = Sieve + collector bottom, without
product being handled from 560 to 6250 grams
grams
Solid line = AS200 with standard / economy sieve
clamping unit
Line with circles = AS200 with “comfort” sieve clamping
unit
To achieve maximum vibration height, the AS200 is to
be operated with a supplementary mass, available as an
accessory, where the sieve stack mass is less than 2
kg.
Subject to technical modification without prior notice
Chart for AS200 , digit and basic
at 110/120 V, 60 Hz
Vibration heights from 0 to 3.0 mm
Sieve stack masses = Sieve + collector bottom, without
product being handled from 560 to 4650 grams
Solid line = AS200 with standard / economy sieve
clamping unit
Crosshatched line =AS200 with “comfort” sieve
clamping unit
Line with circles =AS200 with supplementary weight
and standard sieve clamping unit
Subject to technical modification without prior notice
31.07.2012 Retsch GmbH 23
grams
Explanations of the loading charts
The lower loading capacities for the 60 Hz model when
compared with the 50 Hz model are due to physical
factors.
The series AS200 analytical sieving machines are
resonance-type units; the vibration heights (twice the
amplitude) will depend on the loading in the sieve
carrier.
Here the masses which are joined solidly with the sieve
carrier – those in the collector bottom and the sieve
clamping units – play a primary part. The mass of the
product being handled is of subordinate importance and
is thus not taken into account when calculating the
loading capacity.
Once you have determined the mass of your sieve stack
(collector bottom and sieve) you can refer to the appropriate chart (see pages 28 and 30) to read the vibration
height which can be achieved.
When using the comfort clamping unit, its high intrinsic
weight will naturally impart to your sieving machine
different operating characteristics than you will find with
the standard sieve clamping unit.
Refer to the charts on pages 28 and 30 and the following examples.
Utilizing a supplementary mass (available as an accessory component) will make it possible to extend satisfactorily the working range for sieve configurations with
a small number of sieves and consequently with a low
sieve stack mass. This also applies to the 60 Hz
models.
Example 1 :
* You are working with the AS200, 110V-60 Hz model
* The mass of the sieve stack (base pan and sieves)
amounts to 1500 g.
* You are working with the standard sieve clamping unit
The solid line curve shown in the chart applies
The vibration height which can be achieved with your
machine, under these conditions, is approx. 0.7 mm.
31.07.2012 Retsch GmbH 24
Example 2 :
Without the supplementary mass it would be possible
only to achieve vibration height of 0.6 mm or less.
In normal applications, vibration heights of between 1
and 2 mm are recommended.
At vibration heights exceeding 2.5 mm it can happen in
the basic and digit models that the armature can
strike the magnets due to resonance effects.
Reduce the vibration height slightly, as mechanical
components could otherwise be damaged.
* You are working with the AS200, 110V-60 Hz model
* The mass of the sieve stack (collector bottom and sieves)
amounts to 1500 g.
* You are working with the comfort sieve clamping unit
The crosshatched curve in the chart applies.
The vibration height which can be achieved with your
machine, under these conditions, is approx. 2.5 mm.
Example 3 :
* You are working with the AS200, 110V-60 Hz model
* The mass of the sieve stack (collector bottom and sieves)
amounts to 560 g.
* You are utilizing the supplementary mass (accessory)
* You are working with the standard sieve clamping unit
The curve in the chart identified with the circles is applicable.
The vibration height which can be achieved with your
machine, under these conditions, is approx. 1,6 mm.
Subject to technical modification without prior notice.
31.07.2012 Retsch GmbH 25
Wet sieving
Dry sieving will be possible in the large majority of
cases. There are, however, some materials in which the
adhesive forces between the individual particles can
cause difficulties. These problems can be eliminated by
adding liquid, preferably water, during the sieving
operation (in so far as the additives mentioned in the
chapter on “sieving aids” were not successful). One
pre-condition for wet sieving, however, is that the substances to be separated will not swell, dissolve or otherwise interact with the liquid.
Required accessories
* Clamping cover with spray nozzle, matching the sieve
diameter.
* Base pan with water drain, matching the sieve
diameter.
Preparations
* Position your AS200 near a water drain.
* Use a hose to connect the spray nozzle in the
clamping cover to a water faucet.
* Connect the drain from the base pan with the drain or
a suitable container to receive the liquid.
Operation
* Apply the solid in the form of a suspension.
* Set the liquid (water) supply rate so that the spray just
covers the sieve surface completely.
* Using dispersion agents is advisable. They reduce the
surface tension of the sieve liquids.
* When dealing with goods which resist forming a slurry
or where more exact separation is required, spray
each individual fraction, one after the other.
* Following the sieving process, the fractions are to be
transferred from the individual sieves to suitable filters
(e.g. filter paper) and dried in a drying cabinet at 80°C.
* Then clean the sieves in an ultrasonic bath and dry
them, too, in the drying cabinet (without the gaskets).
Do not exceed a maximum drying temperature of
80°C.
31.07.2012 Retsch GmbH 26
!
Never place the AS200 directly in a basin for
operation.
Fatal electrical shock hazard.
!
During wet sieving always connect the AS200 to a
socket which is protected by a ground fault
interrupter.
Adjust the volume of water applied so that it will
just wet the surface of the screen.
Water backing up in the sieve stack can cause
overloading and thus may damage or destroy the
sieve weave.
The loading capacity charts provided in the Appendix
to these operating instructions are not applicable to
wet sieving.
Due to the difficulty in defining the volume of water in
the sieve stack, it is impossible to make reliable
statements for wet sieving.
31.07.2012 Retsch GmbH 27
General
Accessories
* Sieve clamping unit – economy
* Sieve clamping unit – standard
* Sieve clamping unit – comfort (quick-action
clamp)
* Universal clamping cover – economy /standard
for sieves 100 / 150 / 200 / 203 mm in diameter
* Universal clamping cover – comfort (quick-action
clamping)
for sieves 100 / 150 / 200 / 203 mm in diameter
* Universal wet sieving clamping cover –
economy/standard
for sieves 100 / 150 / 200 / 203 mm in diameter
* Universal wet sieving clamping cover – comfort
for sieves 100 / 150 / 200 / 203 mm in diameter
* Short threaded rods for shorter sieve stacks
max. 5 analytical sieves, each 50 mm high
* Auxiliary weight, 2100 grams
* Conversion kit, vibration ball mill, for the AS200
basic and digit
* Cover for dust-protected storage of complete
sieve stacks
* Intermediate rings to elevate the sieve frame when
dealing with coarse-grained product
* Intermediate screens to carry out several sieving
cuts in a single step
* SP1000 software
31.07.2012 Retsch GmbH 28
Cleaning
!
Never clean the AS200 with running water.
Fatal electrical shock hazard.
Use only a damp rag, moistened with water, for cleaning.
Never use solvents of any kind.
Fig.20
The AS200 requires no routine maintenance. When used
in accordance with the instructions, no maintenance or
adjustment work will have to be carried out.
We recommend cleaning the mounting bars from time to
time when using the comfort sieve clamping unit. In
addition, the comfort sieve clamping unit will produce
unavoidable clamping grooves in the mounting bars after a
certain period of time; this grooving can interfere with
proper clamping.
Consequently it is necessary to examine the mounting rods
occasionally to ascertain whether such grooving has taken
place in the clamping area and, if indicated, to rotate the
mounting rods through 90°. A 17 mm open-end wrench will
be required for this purpose.
Loosen the lock nuts indicated by KM. Fig. 20
Rotate the mounting bars through 90°
Re-tighten the lock nuts firmly.
If rotating the mounting bars through 90° fails to move an
area free of grooving into the engagement area, then we
recommend replacing the mounting bars.
During wet sieving, we recommend checking the water
hoses for leaks every three months.
For thorough, gentle and time-saving cleaning of your
analytical sieves, we recommend using the Retsch UR1
ultrasonic intensive cleaning unit.
Our publication "Care and cleaning of analytical sieve is
available on request, free of charge.
Maintenance
Target group: Operating personnel
31.07.2012 Retsch GmbH 29
Copyright
Reproducing or distributing this documentation, utilizing
or distributing the contents is permitted only with the express consent of Retsch GmbH.
Non-compliance will subject violators to claims for
damages.
Modifications
Subject to modification without prior notice.
Safety regulations for the AS200
Subject
Action
Hazards
Vibration height
Vibration height >2.5 mm in the
AS200 basic and digit models
Armature strikes the magnets;
mechanical components could
be damaged.
Shipping
During shipment the AS200 is not
to be subjected to impact or
vibration; do not throw the
package.
Electronic and mechanical
components could be damaged.
Temperature
fluctuation
In case of temperature
fluctuations, protect the AS200
against condensation.
Electronic components could be
damaged.
Scope of supply
If the shipment is not complete or
is damaged, you must notify the
forwarder and Retsch GmbH
immediately (within 24 hours).
Under certain circumstances
compensation cannot be paid
for claims which are lodged
later.
Ambient
temperature
Temperature below 5°C
Temperature above 40°C
Electronic components could be
damaged.
Humidity
Exceeding 80% R.H. at
temperatures up to 31°C
Electronic components could be
damaged.
Installation
Shipping nuts not removed.
Mechanical and electronic
components could be damaged.
Electrical
connection
Local power supply does not
correspond to the values given on
the data plate.
Mechanical and electrical
components could be damaged.
Sieving aids
Stretching the sieve weave due to
excessive charge weight.
The precision of the analytical
sieve can be impaired.
Sieved product
distribution
Use the long threaded rods when
working with only one to three
sieves.
Overly long rods, extending
above the stack, will interfere
with distribution of the product
due to their intrinsic resonance.
Wet sieving
Never place the AS200 directly in
a basin for operation
Fatal electrical shock hazard.
Line power socket not protected
with a ground fault interrupter.
Fatal electrical shock hazard.
Water volume too great.
Water backing up in the sieve
stack can cause overloading
and thus may damage or
destroy the sieve weave.
Cleaning
Never clean the AS200 with
running water.
Fatal electrical shock hazard.
Extract from the individual chapters
31.07.2012 Retsch GmbH 30
Authorized person for the compilation of technical documents:
J. Bunke (technical documentation)
The following records are held by Retsch GmbH in the form of Technical Documentation:
Detailed records of engineering development, construction plans, study (analysis) of the measures required for
conformity assurance, analysis of the residual risks involved and operating instructions in due form according to
the approved regulations for preparation of user information data.
The CE-conformity of the Retsch Analytical Sieve Shaker Type AS 200 is assured herewith.
In case of a modification to the machine not previously agreed with us as well as the use of not
licensed spare parts and accessories this certificate will lose its validity.
Retsch GmbH Haan, January 2010
Dr. Stefan Mähler
Manager technical services
Retsch Gmb H Re tsch-Allee 1-5 42781 Haan Germany w w w .rets ch.com
ANALYTICAL SIEVE SHAKER
AS 200 basic / digit
FB-EW-805-004 (E) Änderungsstand I 01.2012
CERTIFICATE OF CE-CONFORMITY
Translation
Certificate of CE-Conformity according to:
EC Mechanical Engineering Directive 2006/42/EC
Applied harmonized standards, in particular:
DIN EN ISO 12100 Security of machines
EC Directive Electromagnetic Compatibility 2004/108/EC
Applied standards, in particular:
DIN EN 50081 Generic standard interference emission - living areas - in conjunction with
EN 55022 and EN 60555
DIN EN 50082 Generic standard interference resistance - living areas
Additional applied standards, in particular
DIN EN 61010 Safety prescriptions concerning measuring-, operating-, controlling- and
laboratory equipment
Copyright
® Copyright by
Retsch GmbH
Haan, Retsch-Allee 1-5
D-42781 Haan
Federal Republic of Germany
Loading...