Spacelabs Healthcare elance 5, Руководство по обслуживанию

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Maintenance
Table 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
Equipment Required
Electrical Safety Analyzer, Fluke model 232D or equivalent.
These tests should be performed according to the hospital’s scheduling requirements, at least
annually or after repair or modification.
Note:
All tests must be performed according to the safety analyzer’s operations manual, and
any local requirements.
Warning
Before starting 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.
Ground Resistance
1 Attach the power cord to the monitor under test, then 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.
2 Verify that the resistance is less than 500 milliohms (0.5 ohms).
Chassis Leakage Current Tests
1 Plug the leakage analyzers into mains power.
2 Plug the equipment into the analyzer’s AC receptacle.
3 Verify that the leakage current from the chassis to ground is less than the values in
Table 2.
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