Utah Medical Products Finesse ESU-110, Service Manual

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T
E S T A N D
C
A L I B R A T I O N
P
R O C E D U R E
Complete Calibration Procedure
This procedure is intended as a protocol for functional testing and
calibration of the Finesse
® electrosurgical generator and smoke evac-
uation system. It should be conducted in whole or in part whenever
malfunction or miscalibration is suspected. If the problems encoun-
tered are correctable by the adjustments contained in this procedure,
the adjustments should be made and the generator should be con-
sidered suitable for clinical use. If the problems cannot be thus cor-
rected, more thorough testing or parts replacement may be neces-
sary. In such a case the user technician should note the step or steps
in this procedure that cannot be accomplished as described, note the
measurements actually obtained where applicable, and contact
Customer Service at Utah Medical Products for further assistance or
to make arrangements for factory repair.
CAUTION: The procedures described herein require understanding
and skill in electronics technology. They should be performed only by
qualified electronic or biomedical technicians who understand the ter-
minology and recognize the various components of radio frequency
power circuits. Attempts to carry out these procedures by unqualified
personnel may result in human injury or equipment damage.
EQUIPMENT NEEDED:
• Allen wrench set
• Oscilloscope with two high voltage probes and line iso-
lation transformer
• Digital multimeter
• Electrosurgical analyzer, such as Fluke/DNI 454A
• Safety analyzer, such as Bio-Tek model 170
• AC Hi-Pot Tester
• Handswitch and cable
• Footswitch and cable
• Jumpered dispersive cable with rectangular plug
• 900
Ω
jumper
1.0 VISUAL AND MECHANICAL INSPECTION
1.1 Remove the top shell of the Finesse ® and inspect the interior.
Verify that all connectors are fully seated, that the vacuum
motor is properly secured to its shock mounts, and that all
boards and components attached to the chassis are solidly
mounted.
1.2 Verify that the internal smoke filter is properly aligned with the
pump intake with no discontinuity or visible leaks in the vacu-
um connections.
1.3 Correct all observed mechanical problems by reseating con-
nectors and/or tightening mounting screws as needed.
2.0 INITIAL UNIT SETUP PROCEDURES
CAUTION: The input power connections have an AC voltage of 120
volts or 240 volts, and the collectors of the power transistors, as well
as several points on the circuit boards, have DC voltages in excess of
200 volts. During application of output power, the voltage between
the active and dispersive terminals or circuit components connected
to these terminals may be as high as 2000 volts peak-to-peak at high
frequencies. To prevent shocks or burns, avoid touching any bare
metallic objects, wires, or connections.
CAUTION: Use of an oscilloscope on the Finesse ® generator requires
that the oscilloscope be fully isolated from the main power line by a
transformer. Failure to properly isolate the oscilloscope could result in
extensive damage to the Finesse
® generator and/or oscilloscope.
NOTE: Reference to board level components will be as follows:
1 - 99 display board
101 - 199 logic board
201 - 299 power supply board
301 - 399 RF power board
Finesse Service Manual
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