Welch Allyn Spot Vital Signs 4400 Service Manual page 16

12 Safety
Electronic components and assemblies, if not properly protected against ESD, can be permanently
damaged or destroyed when near or in contact with electrostatically charged objects. When you
handle components or assemblies that are not in protective bags and you are not sure whether
they are static-sensitive, assume that they are static-sensitive and handle them accordingly.
• Perform all service procedures in a static-protected environment. Always use techniques and
equipment designed to protect personnel and equipment from electrostatic discharge.
• Remove static-sensitive components and assemblies from their static-shielding bags only at
static-safe workstations—a properly grounded table and grounded floor mat—and only when
you are wearing a grounded wrist strap (with a resistor of at least 1 megohm in series) or other
grounding device.
• Use only grounded tools when inserting, adjusting, or removing static-sensitive components
and assemblies.
• Remove or insert static-sensitive components and assemblies only with device power turned
off.
• Insert and seal static-sensitive components and assemblies into their original static-shielding
bags before removing them from static-protected areas.
• Always test your ground strap, bench mat, conductive work surface, and ground cord before
removing components and assemblies from their protective bags and before beginning any
disassembly or assembly procedures.