Safety Instructions
M4 TORNADO
17
Table 1 Safety equipment of the M4 TORNADO
Pos. Safety equipment Function
1 Key switch, on the left side
board
Implies an operation by authorized persons only
2 Green warning light “Power”
on the keypad
Indicates that the mains voltage is switched on and the
instrument can be used
3 Blue light “Vacuum” Indicates that the chamber is evacuated, door can only
be opened after venting the sample chamber.
4 Yellow warning light “X-ray
on” on the keypad
Current controlled display, which indicates that the X-
ray tube is switched on and radiation is produced. In
case of failure, the high voltage is switched off or cannot
be switched on.
5 Red warning light “Shutter
open” on the keypad
Indicates that the shutter is open and radiation is in the
sample chamber, shutter can only be opened if sample
chamber door is closed.
6 Primary radiation protection of
the X-ray tube
Housing made of 3 mm brass and 3 mm Cu with a
3 mm hole for limiting the beam emission (not visible).
7 Secondary radiation
protection of the X-ray tube
Housing made of 2 mm steel for further limiting the
emission of X-rays
8 Shutter Software controlled shutter for opening only in case of
closed instrument doors and start of measurement (not
visible).
9 Instrument door with door
switches
Door switches connected to the safety circuitry that
allows opening the door for change of the sample only if
the shutter is closed. The shutter will be closed if the
door is opened. In all other cases the HV is switched off.
10 Internal safety switches Interlock circuit connected with the housing parts inside
the instrument. Opening the instrument for service
purposes will lead to an interruption of HV or even the
24 V power supply (not visible).
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