IKA RW 20 digital - Manual (Page 11)

• Protect the appliance and accessories from bumps and
impacts.
• The appliance may heat up when in use. The device may
become very hot in case of malfunction.
• The appliance may only be opened by experts.
• Adjust the speed of the motor on your test rig so that that it
is not possible for any contact to occur between the contai-
ner and the stirring tool (to avoid breaking the glass).
• Ensure that the motion of the stirring tool is smooth and uni-
form (no imbalance).
• Warning: For safety reasons, the device may switch off
under full load, with 10% over-voltage, and at 40 °C ambient
temperature.
• In order to restart the device following a malfunction, it must
switched off for a short time and allowed to cool down befo-
re being switched on again.
• The motor speed should be reduced following a malfunction.
• Never operate the eqipment with hte stirrer tools rotating
freely. Pay attention when setting the speed to any imbalan-
ce of the stirrer tools and possible spraying of the medium to
be stirred.
• Please use stirring shaft protective equipment!
• Operating with a freely rotating shaft end is dangerous.
Therefor for safety reasons the stirrer tool is permitted to project
over the upper edge of the housing only when the appliance is
not running.
• For correct operation, the rubber diaphragm must always be
completely closed.
• Take care to ensure that the shaft never runs directly in the
rubber diaphragm and any friction with rotating parts (stirrer
shafts) is excluded.
• Please pay attention to the dangerous parts of the equipment
marked in Figure 1.
The RW20 digital laboratory stirrer can be used to stir and mix
liquids of low to medium viscosity with various stirring tools. It
is designed for use in laboratories. In order to use the appliance
properly, it must be carefully secured to the stand using the canti-
lever and a cross sleeve.
4 Unpack
- Please unpack the device carefully
- In the case of any damage a fact report must be set immedia-
tely (post, rail or forwarder)
4 Delivery scope
One stirrer RW 20 digital, a chuck key and operation
instructions.
The ball race capacitor motor, protected to IP 42, is
maintenance-free. In its winding it carries a special overheating
circuit breaker (self-locking temperature limiter) which shuts
down the motor permanently if the permissible motor
temperature is exceeded.
This special type of circuit breaker is used when the automatic
reactivation of the protected unit after overheating is
undesirable or impermissible. The principle of the temperature
limiter is that of a switch that heats up and isolates the motor
from the power supply when the maximum permissible
temperature is reached.
When the self-locking temperature sensor is tripped, the LED
(D) Err5 on the front plate of the unit lights up to indicate the
motor overload and the stoppage of the motor.
RW20d0506 11
Unpacking
Motor protection
Correct use