Cynosure Acclaim 7000, Техническое руководство

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Apogee Elite/Apogee 5500/Acclaim 7000 850-1257-000, Rev. 2 Page 37 of 70
Technical Guide
Section 7 SERVICE PROCEDURES–PERFORMANCE
One of the most frequent causes of a service call is for “high voltage power supply limit
reached,” which is basically a low energy condition. It is important to understand, evaluate and
diagnose this problem accurately.
This section includes information on the following topics that should be used to determine the
cause of the problem.
♦
Understanding performance criteria,
♦
Verifying the resonator performance and fiber coupling efficiency,
♦
Checking the condition of fiber,
♦
Checking the condition of the handpiece,
♦
Checking the condition and alignment of the focusing lens.
Performance Criteria
There are two performance criteria that must be met to define a properly working laser: system
performance and resonator performance.
System Performance
System performance is defined from the point of view of the laser operator with a totally
assembled laser. The laser must meet all fluence specifications as outlined in the
Operator’s Manual .
Resonator Performance
A separate performance standard for each laser has been established for the resonator output. In
order to meet the system performance criteria, the resonator must generate approximately 20%
more output to compensate for losses in coupling to the delivery system.
For the Alexandrite lasers, the resonator must be capable of generating a minimum of 55
joules/pulse @ 1Hz or 55 Watts. This is based upon a system performance criteria of 25 J/cm
2
with a 15-mm handpiece, which equals 44 joules/pulse out of the handpiece. Adding a nominal
20% for delivery system losses, this means that the resonator must produce 55 joules/pulse. If
the system cannot meet this criterion, the efficiency of the laser must be improved.
For the Nd: YAG lasers, the resonator must be capable of generating a minimum of 78.5
joules/pulse @ 1Hz or 78.5 Watts. This is based upon a system performance criteria of 80 J/cm
2
with a 10-mm handpiece, which equals 62.8 joules/pulse out of the handpiece. Adding a nominal
20% for delivery system losses, this means that the resonator must produce 78.5 joules/pulse. If
the system cannot meet this criterion, the efficiency of the laser must be improved.