Maintenance
91369 Service Manual
4-2
Mechanical Inspection
Verify that:
• The monitor and all optional equipment are clean.
• All screws are tight.
• The case and connector pins are not damaged.
• There are no frayed or pinched wires or cables.
Electrical Safety Testing
Safety testing protects the patient from electrical shock, especially micro-shock. It has been determined
experimentally that current values in the microampere (
μ
A) range may cause fatal arrhythmias in electrically
susceptible patients. A patient is deemed electrically susceptible when connected to monitoring equipment.
Definitions
Classification
— IEC/EN/UL 60601-1 Safety standard designation for the class of equipment and type of
patient applied parts that indicate the degree of protection provided against electrical shock.
Leakage Current
— Current that is not functional. It includes patient leakage, ground leakage, and enclosure
(or chassis) leakage.
Patient Lead Leakage
— Current that flows from the applied part of the patient lead to ground.
Chassis Leakage
— Current flowing from the enclosure (or from conductive parts accessible to the operator)
through the ground conductor.
Normal Condition
— Condition in which all means provided for protection are intact. Includes, ground
connections, insulation, creepage and clearance distances.
Single Fault Condition
— Open ground, open neutral, line voltage on a patient connection, or any single state
other than normal condition that could compromise patient safety.
UUT
— Unit Under Test.
Spacelabs Healthcare does not endorse standards to the exclusion of others. Therefore:
BE SURE TO
CHECK YOUR LOCAL REQUIREMENTS TO ENSURE YOUR EQUIPMENT SAFETY TESTS COMPLY
WITH LOCAL STANDARDS
. Generally accepted standards for medical monitoring equipment, such as the
Underwriters Laboratory (UL) and the National Fire Protection Association (NFPA) standards, are summarized
in
.
