GE CareScape V100, Service Manual

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2-8 CARESCAPE V100 Vital Signs Monitor 2048723-002C
Equipment overview: Overall principles of operation
The monitor is a portable unit that receives power from an internal rechargeable
lead-acid main battery.
When the On/Off button is pressed, the Main Board is brought out of a sleep
mode and turns on the power regulators. The power regulators provide
conditioned power from the main battery. The external DC source is used only to
charge the main battery. Once the monitor is energized, a self-test is performed.
The self-test automatically tests the main functions of the monitor. Failure of the
self-test will set the monitor into a fail-safe mode with an audio alarm.
Under normal operating conditions, the monitor is ready to record the patient
vital signs using three external attachments: the temperature probe, SpO
2
sensor, and cuff. Interface with a central station or other device is accomplished
through the host communication port on the back of the monitor.
NOTES

Prior to each use, inspect the power supply cord to ensure proper
connection and condition.

Be sure to unplug the monitor before transport.
SpO
2
The SpO
2
probe has a built-in sensor. When the SpO
2
sensor is attached to the
SpO
2
connector and patient, the probe senses both heart rate and oxygen
saturation. The analog signals are routed to the SpO
2
Printed Wiring Assemblies
(PWA) for Ohmeda, Nellcor, or Masimo. The analog signals are analyzed on the
SpO
2
PWA. The results are digitized and sent to the Main Board via opto
couplers. The couplers provide patient isolation as well as serial data interface.
The Main Board temporarily stores the data and routes it to the UI Board for
display and/or printer.
A reset signal to the SpO
2
PWA is also provided so that power up sequencing is
correct. If the SpO
2
circuit quits communicating to the Main Board, the Main
Board will attempt to reset the SpO
2
PWA.
Cuff blood pressure (NIBP) and pulse
The NIBP parameter in the monitor is available with three types of DINAMAP
NIBP technologies: two calibrated to intra-arterial pressure (Classic and
SuperSTAT) and one calibrated to the auscultatory method (Auscultatory).
Specific technologies are available in select markets. All user interface options,
instructions for use, and alarms will be the same for all technologies. The NIBP
parameter is included in all models. Blood pressure is monitored noninvasively in
the monitor by oscillometric method.
NOTE
For neonatal populations, the reference is always the intra-arterial pressure
monitoring method.
When the cuff and hose are attached to the monitor and a Non-Invasive Blood
Pressure (NIBP) determination is initiated, the pump inflates the cuff. Pressure
transducers PT1 and PT2 monitor pressure information. The pneumatic manifold