Periodic Safety Check (Routine Maintenance) - Covidien Valleylab LS10 Service Manual

Periodic Safety Check (Routine Maintenance)

Periodic Safety Check (Routine Maintenance)
Perform the following safety check once a year to verify that the system is functioning
properly. Record the test results for reference in future tests. Copy the check sheet at the
end of this chapter for use in recording the results. Keep the completed check sheet for
future reference. If the system fails to meet any of the checks, refer to Chapter 5,
Troubleshooting.
Warning
Electric Shock Hazard When taking measurements or troubleshooting the system, take
appropriate precautions, such as using isolated tools and equipment, using the "one hand rule",
etc.
Electric Shock Hazard Do not touch any exposed wiring or conductive surfaces while the
system is disassembled and energized. Never wear a grounding strap when working on an
energized system.
Precaution
The system contains electrostatic-sensitive components. When repairing the system, work at a
static-control workstation. Wear a grounding strap when handling electrostatic-sensitive
components, except when working on an energized system. Handle PCBAs by their non-
conductive edges. Use an antistatic container for transport of electrostatic-sensitive components
and PCBAs.
Important
When testing RF equipment, follow these test procedures to duplicate manufacturer test data.
Keep test leads to the minimum length usable; lead inductance and stray capacitance can
adversely affect readings. Carefully select suitable ground points to avoid ground loop error in
measurements.
The accuracy of most RF instruments is approximately 1%–5% of full scale. Using
uncompensated scope probes causes large errors when measuring high-voltage RF waveforms.
Full definitions of the periodic safety checks are found throughout this section of the
manual. A summary of the periodic safety checks is:
• Inspect the system and accessories
• Inspect the internal components
• Test the system
• Confirm outputs
• Check leakage current and ground resistance
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