“Mill pulverisette 5”
The laboratory planetary mill "pulverisette 5" can be used universally for high-speed grinding of liquid or solid inorganic and organic samples for analysis, quality control or material testing. In the case of synthesis, the "pulverisette 5" is used to mix and homogenise dry sam-ples, emulsions or pastes. Approx. initial sample size for hard material is max. 10 mm Approx. quantity of sample to be ground is max. 800 ml (in four 500ml grinding bowls each with 10 grinding balls 30 mm in diameter) Average final fineness d50 < 1μm (depending on the materials).
1 The working method :The material to be ground is crushed and torn apart by grinding balls in 2 or 4 grinding bowls. The centrifugal forces created by the rotation of the grinding bowls around their own axis and the rotating supporting disc are applied to
the grinding bowl charge of material and grinding balls Since the directions of rotation of grinding bowls and supporting disc are opposed, the centrifugal forces are alternately synchronised and opposite. Thus friction results from the grinding balls and the material being ground alternately rolling on the inner wall of the bowl, and impact results when they are lifted and thrown across the bowl to strike the opposite wall. The impact is intensified by the grinding balls striking one another. The impact energy of the grinding balls in the normal direc-tion attains values up to 40 times higher than gravitational acceleration. Loss-free comminution is guaranteed by a hermetic seal between grinding bowls and lid - even if suspensions are being ground.
Operating safety
The planetary mill is secured with a personnel safety switch.This switch locks the lid during operation and prevents the mill from starting when the lid is open.
⇒The planetary mill cannot be opened during operation.
⇒The planetary mill will not start when the lid is open.
Locking the lid:
When power to the mill is switched off, the lid is locked. To open the lid, connect the mill to the AC power and turn on the master switch.
In emergencies only:
Using a tool to open the mill when the power is switched off:
After removing the cover on the front left of the housing, turn socket hex key 2.5 mm- 90° in clockwise direction to open the personnel safety switch. After opening the lid, reset the safety switch with a ⇒ 90° turn in counter clockwise direction and put the cover back on. After the "STOP" key is pressed, the mill decelerates: standstill in
seconds.
⇒Lid can be opened.
In case of power failure during operation(or if mill turned off at the master switch)
⇒Lid remains locked.
Recovery AC power opens the lid lock.
⇒Mill is secured against restarting.
⇒Press the " START " key : mill starts up.
Turning off the master switch results in a bipolar separation of the entire mill from the AC power.Turn the master switch off whenever the mill is "Out of service" for a protracted pe-riod.
⇒night-time shutoff
For overload protection the speed of the mill is automatically reduced by an electronic monitoring of its current and speed. Simultaneously a red warning lamp „Overload“ lights up. If with long term working the maximum permissible temperature of the motor is reached an automatic thermal sensor switches off the power. After cooling down the motor can be switched on by pressing the Start-key.
3 Setting up the planetary mill
Set up the planetary mill indoors on a flat, sturdy surface. It is not necessary to fasten it in place. The room temperature must be between 0 and 40°C. Make certain that the mill is easy to access. Keep ventilation grille on back unobstructed for air discharge.
4 Electrical connections
120 / 240 6 10% VAC single-phase with PE conductor, 50/60Hz, 2300 watt max. power consumption (under normal load significantly lower) 100 - 120 volt fuse: 25 A; 200 - 240 volt fuse: 16 A. Turn on the master switch (black knob-operated switch) on the left-hand side. The green Ready lamp (Power Supply) will light up.