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• Audible warning signal in the case of defective parts in the shutter safety circuit: If a
part in the shutter safety circuit is defective, a tone sounds at intervals. For safety
reasons, the shutters remain closed. No further use of the laser is possible. In this
situation, the system must not be operated. Contact the Leica branch office in your
country or your contact person.
• Audible warning signal in case of defective laser emission indicator port: The relay
contact for the laser emission indicator port is safety monitored. If the relay fails, an
audible warning signal sounds at regular intervals. Notify Leica Service immediately. If
a laser emission indicator is connected to the laser emission indicator port, the system
may not be operated.
• Audible warning signal during automatic firmware update: During the update of the
firmware, a continuous tone sounds. After the updated component is automatically
restarted, the signal stops. During the automatic update and the automatic restart of the
component, you may not switch off or restart the system, since otherwise this can lead
to damage to the system.
• Warning signal in the case of light that is too intense reaching the APDs: APDs are
extremely sensitive detectors which can be damaged irreparably by light that is too
intense (such as room lighting). For this reason, APDs are protected by an automatic
shut-off. If the light that falls on the APDs is too intense, they are switched off for a few
seconds and an audible warning signal is emitted. The APDs are automatically
reactivated after a few seconds. Either switch off the APDs or reduce the light intensity
(e.g. by reducing the light intensity of the laser).
Safety Features
77
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