Spacelabs qube 91390, Service Manual

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Q U B E
M
A I N T E N A N C E
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 MAKE SURE 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
Table 4-1 on page
4-3.
Equipment Required
Electrical Safety Analyzer, Fluke model 232D, or equivalent.
Perform these tests according to the scheduling requirements for
the hospital, at least annually or after repair or modification.
Note:
Perform all tests according to the operations manual for the
safety analyzer and any local requirements.
Ground Resistance
1 Attach the power cord to the monitor under test.
2 Measure the resistance from the AC power cord third wire ground
to a chassis location, such as the equipotential post on the rear of
the monitor.
Table 4-1 Summary of Standards for Medical Monitoring Equipment
International Mains to
Chassis Leakage U.S. (120 V) Mains to
Chassis Leakage
Mains Resistance
100
μ
A - normal condition, ground
attached (AC connector to chassis)
300
μ
A - normal condition, ground
attached (AC connector to chassis)
500 milliohms*
500
μ
A - single fault condition, open
ground, or reverse polarity
300
μ
A - single fault condition, open
ground, or reverse polarity
500 milliohms*
* Measured from the AC Power cord third wire ground to the most distant ground attachment
Warning:
Before you start safety tests, ensure that no patient is connected to the
device under test. If safety tests must be performed on equipment
currently monitoring a patient, obtain permission to disconnect the
cables from the monitor and patient.