VWR STAR-BEATER
SHORT INSTRUCTION MANUAL (EN)
VWR International bv -
Haasrode Research Park, Zone 2020 - Geldenaaksebaan 464 - BE-3001 Leuven -
1 / 1
Ver. 4
Date: 8.11.2021
European Catalogue Number: 412-0167 STAR-BEATER
1. GENERAL DESCRIPTION
The Star-Beater is a laboratory machine, which is suitable for milling and homogenizing soft, fibrous, hard and brittle materials in the dry and wet state.
It is used for fast, super fine milling of 2 samples simultaneously. The closed milling system guarantees complete recovery of the samples. Owing to the extremely short milling time and the high final
fineness of the milled material, the Star-Beater is also ideally suitable for sample preparation for all spectral analyses.
Final finenesses of down to 1 μm can be achieved, depending on the milling time and the specific properties of the sample material. The optimum milling jar filling is as a rule 1/3 of the milling jar volume.
Exceptions to this are voluminous materials, such as wool, leaves, grasses and suchlike. In these cases a filling level of 70-80% is necessary.
The sample quantity should not be less than 25% of the milling jar volume.
The milling balls may otherwise damage the milling jars.
The milling jar materials and milling ball materials must always be identical or compatible.
The milling balls may otherwise damage the milling jars.
2. PROTECTIVE EQUIPMENT
The milling chamber of the Star-Beater is enclosed by a strong covering hood.
Starting of the machine is possible only with the hood closed. If the hood is open, message "LId" appears on display, when you press the START/STOP key.
When message "LId" appears on display, you have to close the hood and clear the message by pressing the START/STOP key. Then you can start the machine by pressing the START/STOP key again.
If you open the hood during the operation, the machine stops rapidly and message "Er3" appears on display. When message "Er3" appears on display, you can't start the machine again by pressing the
START/STOP key. You have to turn the main POWER switch OFF and then ON again, to clear the message and use the machine again.
3. INSTRUCTIONS FOR USE
3.2. CONTROL PANEL DESCRIPTION
3.1. OVERALL VIEW
Position
Description
Function
1
Control panel with display
Time and vibrational frequency setting, starting /
stopping the machine.
2
Hood
Closes the milling chamber.
3
Milling jar holder - left
Holds the milling jar.
4
Milling jar holder - right
Holds the milling jar.
5
POWER switch
For switching the Star-Beater on and off.
6
Mains socket
Connection for power cord to the machine.
7
Fuse compartment
Contains two fuses.
3.3. INSERTING / REPLACING THE MILLING JARS
Place the milling jars, filled with the material to be milled and milling balls, into the centering points
A
of the clamping devices and clamp firmly.
•
Lift the locking pin
B
upwards from the groove and turn it for
90° in any direction. This unlocks the locking device.
•
Turn the knob
C
counterclockwise, until the max. clamping range is reached.
•
Turn the locking pin
B
back for
90° until it engages in the groove again.
•
Insert the milling jar and press lightly into the centering point
A
.
•
Gently turn the knob
C
clockwise, until the milling jar just fits, free of play, in the holder. Then continue to turn the knob clockwise for 1 - 2
clicks, while at the same time the locking pin
B
is raised and lowered.
The engaged locking pin prevents automatic opening of the milling jar holder.
If the locking pin
B
cannot be pulled upwards to release it, unlocking should not be forced with any tool. Otherwise the locking pin can break off. Briefly retighten the knob
C
in the clockwise direction and
the locking pin can then move freely again.
To remove the milling jar, lift the locking pin
B
, turn it for 90° and turn the knob
C
in the direction to loosen it.
3.4. BASIC OPERATION
•
Switch on the Star-Beater with POWER switch on the right side of the housing.
Setting the milling time
•
TIME signal light shines. With rotating ENCODER right (+) or left (-), set the milling time to required value from 5 sec to 99 min.
Examples:
98.5
98 min 50 sec
9.59
9 min 59 sec
0.59
59 sec
•
If you want to set the time to hold (continued operation), set "HLd" on display. You get message "HLd" on display, under time value 0.05 or above time value 99.0.
Setting the frequency
•
Push ENCODER knob, so that FREQUENCY signal light shines. With rotating ENCODER right (+) or left (-), set the vibrational frequency to required value from 3 to 30 Hz.
Example:
20.0
20.0/s
Starting the milling process
•
Press START/STOP key. RUN and TIME signal lights shine. The machine counts down the time from set value.
Note: You cannot modify the time during the operation of the machine.
Changing the frequency during the operation
•
If you want to change the vibrational frequency during the operation of the machine, push ENCODER knob, so that the FREQUENCY signal light shines. Rotate ENCODER right (+) or left (-) to
required value. In the meantime FREQUENCY signal light is flashing. When you stop rotating ENCODER knob, signal light FREQUENCY stops flashing after 2 sec.
Stopping the milling process
•
When the time elapses or when you press START/STOP key again, message "End" appears on display and RUN signal light flashes. When the machine stops completely, the last used values for
time and frequency are automatically reset.
For more details, please consult the full manual.
- POWER switch (on the right side of Star-Beater) - switches ON (power switch shines) or OFF
the power of the machine.
- RUN signal light (green) - shines when Star-Beater is running.
- TIME signal light (yellow) - shines when Star-Beater is set on time.
- FREQUENCY signal light (yellow) - shines when Star-Beater is set on vibrational frequency.
- ENCODER knob (push or rotate) - with rotating ENCODER right (+) or left (-), you change
TIME or FREQUENCY on the machine. Push ENCODER to switch between TIME and
FREQUENCY setting values. If you rotate ENCODER knob fast, then values on display go up
or down quickly.
- START/STOP key - starts or stops the operation of Star-Beater.
1
2
2
3
4
5
5
7
6
B
C
A
B
C
A
