WARNINGS AND SAFETY PRECAUTIONS
6 MJB4 - Warnings and Safety Rev07 05-10
1
1.6.2. Preparing the Machine for
Working
Check that the vibration-insulated table (if present)
is working.
Caution!
In the event of a loss of pressure, the ta-
ble can drop and trap your fingers!
1.6.2.1. Preparing to Switch ON
The following instructions assume that the mask
aligner has been correctly installed and that the ma
-
chine has been connected to the power supply net-
work by switching on the main power switch.
The following pressure values should be present on
the machine:
• Compressed air
5,5 - 7 bar (COMPRESSED AIR)
• Nitrogen
2 - 3 bar (NITROGEN)
• Vacuum
-0.8 bar (means 0.2 bar absolute (VACUUM))
Caution!
When CDA supply is being pressurized
the microsope will rise to its upper rest
-
ing position immediately.
1.6.2.2. Configuration of MJB4 after
Maintenance or Service
Caution!
The moveable front tube of the mirror
house shall be adjusted so that there is
no gap visible between the front tube
and the fixed rear tube in order to avoid
pinch points and UV light leaking.
1.6.3. Safety Checks
The important safety functions of the machine
should be checked for safe functioning at regular in
-
tervals - i.e at least every three months.
This applies as long as the check itself does not rep-
resent a hazard.
The following should be tested:
• that the machine stops immediately and the mi-
croscope moves up if the main switch is posi-
tioned to OFF.
• acoustic warning signal by the power supply unit
in the event of a failure in the nitrogen supply -
only very brief for test purposes!
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