Smiths Medical Medfusion 3000 Series, Техническое и сервисное руководство

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Introduction
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Glossary of Technical Terms
This is a glossary of technical terms relating to the Medfusion™ 3000 Series pumps.
Term Definition
AC Line Leakage Test The pump is listed as Safety Class II, Type CF equipment (Medfusion™ 3500BC
pumps are listed as Safety Class II with functional earth, type CF equipment).
Protection against electrical shock does not rely only upon basic insulation, but
instead relies on double or reinforced insulation. As such, this equipment does not
use a third wire ground (earth ground). Therefore, when doing line leakage test it is
not necessary to measure leakage in both the open ground and closed ground set-
ting. Nor is it necessary or relevant to perform a ground resistance test. Medfusion™
3500BC: The third wire ground (earth ground) serves a functional and not a safety
purpose. Therefore, it is neither necessary nor relevant to perform a ground resis -
tance test.
Protection against leakage current is the concern for any device (be it Class I or
Class II) deriving power from AC mains. Leakage current is what flows from mains
side to device component(s) that is conductive and accessible by the user or patient.
Safety grounding of exposed metal does not protect the user from leakage current.
Safety grounding causes a circuit breaker or fuse to open should a short occur be -
tween wall AC side and grounded metal.
The Medfusion™ 3000 Series pump achieves protection by double-isolating second -
ary power and exposed metal from AC power. The Medfusion™ 3000 pump satisfies
the UL requirement that 4000 volts can be applied between AC side and exposed
metal without causing significant current to flow.
Alarm History See “view alarm history” .
Alarm Message The onscreen text which appears to indicate situations or circumstances requiring
user attention.
Backup Audio Buzzer The backup audio buzzer provides a means of generating an alarm during:
• instrument power loss (while the instrument was on)
• malfunction of the main microprocessor
• or failure of the primary speaker.
The backup audio buzzer activates during Watchdog Alarm , anytime there is a mal-
function of the main microprocessor. During power-up self-tests, the buzzer func -
tion is verified by briefly allowing the watchdog alarm to activate.
Backup Super Capacitor
A one (1) Farad Super Capacitor is part of the power control design to provide
backup power to the audio buzzer in the loss of the primary power source.
Battery Gauge The gauge circuits monitor direction and magnitude of current flowing through the
battery.
• The battery current is sensed by the gauge.
• The gauge then computes capacity.
To control charging the battery, the gauge uses battery temperature and battery
voltage. The gauge changes to trickle charge in the event the battery temperature
exceeds 50°C or if the battery voltage is lower than 5.7 volts.