FRITSCH PULVERISETTE 23 - Manual (Page 25)

6.8 Control panel
6.8.1 Setting the vibration frequency
The vibration frequency can be set as 15-50 Hz (strokes per second) in 1
Hz steps using the +/- buttons (oscillation). The mill generates natural
oscillation of higher or lower intensity depending on the stroke fre-
quency. The set oscillation frequency is controlled by the microprocessor
and thus guarantees reproducible grinding.
6.8.2 Setting the running time
The running time is set using the +/- buttons (timer). In the factory set
mode, the two right-hand numbers show the minutes and the left-hand
number the hours. 1 hour 59 minutes is the maximum time which can be
set. For grinding operations that are accurate to the second use the
minutes/seconds timer (see Ä Chapter 4.6 ‘Changing the timer’
on page 17).
6.9 Conducting a grinding operation
After everything has been set up, as described in Ä Chapter 6 ‘Using the
planetary mill’ on page 19, press the START button on the control panel.
Do not touch or disturb the grinding bowl or the clamping device during
this time. The device will start up and run for the grinding time set on the
timer. Grinding can be paused at any time by pressing the STOP button.
The grinding running time on the timer stops and, once the START
button is pressed, resumes, accurate to the second. This can be carried
out, for example, in order to check the bowl temperature or the
clamping device. If the time is altered, the timer will be reset.
Using the planetary mill
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