Tabla de contenido
• Range of use
- Laboratories
- Technical colleges
- Pharmacies
- Small-scale production
The safety of the user cannot be guaranteed if the
appliance is operated with accessories that are
You can set speeds of 57 to 1300 rpm with the
50 Hz (mains frequency) version and speeds from
69 to 1560 rpm with the 60 Hz (mains frequency)
version. The unit heats up during use. The ample
cooling surfaces on the motor serve to distribute
and radiate the heat as evenly as possible.
You can also use high-sided mixing vessels to-
gether with IKA
stands without any problem.
®
The unit comes without a connection cable be-
cause the user's installations mean that it is not
The motor can be infi nitely adjusted via a friction
wheel drive unit but is operated in one position
only. The power output, rotational speed and
torque of the motor are regarded as constant and
are optimized for this operating position. After
the friction wheel drive the motor power output
is transmitted to the off-drive shaft of the stirrer
via either the fi rst or second stage of the subse-
quent manually adjustable toothed gear train.
Neglecting all losses, the power at the off-drive
shaft during power transmission (conversion)
is always as great as the power output of the
The ball race three-phase motor is maintenance-
free. Its attached switching unit features a special
safety device for operation in the case of over-
current and undervoltage (undervoltage release)
to permanently disconnect the motor and avo-
id thermal damage. The appliance can only be
started up again by activating the ON/OFF switch
(Fig. 2), when power permitted for the motor is
supplied.
You can fi nd the basic connection and rating for the
motor on its rating plate.
not supplied or recommended by the manufac-
turer or if the appliance is operated improperly
contrary to the manufacturer's specifi cations or
if the appliance or the printed circuit board are
modifi ed by third parties.
Useful information
possible to issue a standardlength cable due to
the different sizes of premises. Experts can deter-
mine the pin assignment from the wiring plan.
The precision shaft is shaped as a hollow shaft
and accommodates stirrer shanks of up to 13
mm in diameter. It is important to note here that
these may only be inserted to just before the top
edge of the casing. You must also ensure that
the stirrer shank is securely clamped in the chuck.
Drive
motor. The gear train merely provides rpm and
torque conversion, which can be described in
purely theoretical terms by the characteristic cur-
ve plotted in Fig. 1.
Friction wheel wear is kept low by a helical clutch
matched to the gear train. The down-pressure
required at the friction wheel is adjusted by the
helical clutch according to the moment acting
on the stirrer shaft. A low torque results in a low
down-pressure; a high torque results in a high
downpressure.
Motor circuit breaker
The safety switch SI 400 can also be connec-
ted in the motor switching unit. When used in
combination with an IKA
user to switch on the appliance only at a defi ned
height in the stand's working range.
If the stirring unit is operated in such a way that
the appliance's EMERGENCY OFF switch ( (B)
(Fig. 2) is not accessible, you must add another
EMERGENCY OFF switch to the work area so
that it can be easily reached.
®
stand, this allows the
14
Capítulos
Tabla de contenido
