User Manual

Operating the machine
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5.4 Operating elements and displays
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Fig. 19: Control unit
Element
Description
Function
B1
LED on – valve open
LED off – valve closed
Indicates whether the internal solenoid valve on the
liquid nitrogen supply line is open or closed.
B2
LED on – liquid nitrogen is flowing
LED off – no liquid nitrogen
Indicates that liquid nitrogen is flowing into the device.
B3
LED precooling is running (Vkz)
Precooling is taking place / lights up when values are
set
B4
LED grinding is running (Mz)
The sample is ground / lights up when values are set
B5
LED intermediate cooling is running
(Zkz)
Intermediate cooling is taking plate / lights up when
values are set
B7
Frequency minus button
In setting mode and in operating mode:
reduces the set frequency by 1 Hz (1/s). Continuous
pressing switches on fast scrolling of numbers.
Frequency plus button
In setting mode and in operating mode:
increases the set frequency by 1 Hz (1/s). Continuous
pressing switches on fast scrolling of numbers.
B8
Cooling cycle minus button
Reduces the number of total cycles by 1
Cooling cycle plus button
Increases the number of total cycles by 1
B9
Time minus button
In setting mode and in operating mode:
Reducing the set
• Precooling
• Grinding time
• Intermediate cooling time
B10
B7
B8
B15
B2
B1
B11
B12
B13
B9
B14
B3
B4
B5