ConMed sabre 180, Service Manual

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4.1 GENERAL MAINTENANCE
INFORMATION
This section contains information useful in the
maintenance and repair of the Sabre 180. While
the unit has been designed and manufactured to
high industry standards, it is recommended that
periodic inspection and performance testing be
performed to ensure continual safe and effective
operation.
Ease of maintenance was a primary consideration
in the design of the Sabre 180. Maintenance
features of this unit include microprocessor aided
troubleshooting aids and calibration, built in fault
detection, circuit simplicity, circuit protection, use
of common parts, easy access to circuitry while
the unit is operational, and fused power transis-
tors. These features coupled with the warranty,
loaner equipment, factory support, toll free phone
service to the factory and available factory train-
ing ensure the user of a minimal maintenance
effort and long service life.
4.2 PERIODIC TESTING
The Sabre 180 should be performance tested at
least once a year. Every unit is supplied with a
serialized Production Test Data Sheet that tabu-
lates the results of the factory tests that were per-
formed on the unit. This data is supplied so that
it may be used as a reference for subsequent tests.
Recommended periodic performance tests are list-
ed in the following sections.
Instructions for cleaning and periodic physical
inspection are contained in Sections 2.6.2 and
2.6.3 of this manual. Functional testing instruc-
tions for controls and displays appear in Section
2.3.1.
When comparing your RF output current read-
ings to those on the Test Data Sheet, bear in
mind that most RF ammeters may read an error
up to 2% of full scale. This means an actual cur-
rent of 0.60A may register on a 1A meter any-
where from 0.58 to 0.62A.
4.2.1 Ground Integrity
Equipment:
•Volt-Ohmmeter, Simpson 260 or equivalent.
Procedure: Connect the ohmmeter between the
earth ground prong of the power plug and
footswitch connector. Confirm less than 0.1 ohm
resistance.
4.2.2 Mains Frequency Leakage
Equipment:
•Mains polarity reversing and ground interrupt-
ing AC power switch box.
•High Impedance AC Millivoltmeter (Fluke
8000 A or equivalent).
•Frequency Compensation Network (1K resistor
in parallel with the series combination of a 10
ohm resistor and a 0.15 uf capacitor.
•Footswitch.
•Short hand switch jumper lead.
Procedure:
1. Connect the switch box to a non-isolated,
grounded source of AC power at the unit's name-
plate rating. Connect the ESU to the switch box,
power up and set all power controls to zero.
2. Connect the compensation network across the
meter AC voltage input terminals.
3. Set the meter to resolve 1 millivolt AC or less.
With the compensation network connected, the
meter may be read in microamperes (uA).
4. Connect the low side meter input lead to earth
ground.
Maintenance
Section 4.0
4-1