IKA RW 20 digital - Manual (Page 12)

The rotation speed is adjusted with the rotary knob (B) on the
front plate.
The rotational speed is displayed directly in revolutions per
minute (rpm) on the LED display (D).
For correct use, the stirrer machine must be fixed with a cross
sleeve to a stable stand (Fig. 4). The stirrer container should
always be fixed with a tensioner for safety reasons.
Attaching the stirrer to the stand
Please refer to assembly diagram
(Fig. 4)
Attach the cross sleeve (K) to the upright of the stand (I).
Attach the extension arm (L) to the side of the cross sleeve
not in use, with the opening facing upwards.
Tighten both clamping bolts (M) firmly once the desired posi-
tion for the stirring procedure has been adjusted correctly.
Check that the stirrer is held in position firmly prior
to each use and also at regular intervals. The position
of the stirrer must only be adjusted when the equip-
ment is stationary and the power supply is dis-
connected.
Attaching a stirring tool using the chuck
Please refer to assembly diagram
(Fig. 5)
Slide the stirring tool (G) into the chuck (F). Tighten the chuck
firmly using the chuck key (H).
In this case the unit can only be switched back on after it has
been switched off for approx. 4-5 minutes by pressing the
rocker switch (A) on the front plate or by disconnecting the
mains plug.
After this short cooling period, the contacts in the current
circuit are closed again and the unit is operational once more.
Should it be necessary to change the gear speed in the course
of setting up an experiment or process with glass apparatus,
then attention must be paid to the movement of the stirrer
attachment by the eccentric bearing bush and to the
movement in the axial direction. If this is unacceptable, the
stirrer attachment must be loosened in the chuck.
Turning (counter-clockwise) the bearing bush at the black
knurled surface over the chuck disengages the gears. The
center axis of the stirrer attachment shifts 2.2mm in the radial
direction. The bearing bush is then moved 5.5mm up or down
in the axial direction according to the range to be set. Turning
back (clockwise) the bearing bush re-engages the gears and
swings the center axis of the stirrer attachment back to its
original position.
Gear Speed Change
Speed Display
RW20d0506 12
Commissioning
Attaching