GE DINAMAP ProCare, Service Manual

Page: 34 / 134

2-12 DINAMAP
®
ProCare Monitor Service Manual Revision C
2009381-001
Equipment Overview: Functional Description
Temperature (Model 200 and 400)
The ProCare Monitor uses Alaris Turbo Temp technology to measure patient
temperature. The Turbo Temp probe contains a heating element that preheats
the probe to reduce determination time. The heating function is controlled by the
Main Board. The Turbo Temp probe also contains a thermistor that indicates the
temperature. When the probe is attached to the temperature connector and
patient, the signal generated by the thermistor is routed to the Main Board. The
Main Board converts the thermistor signal along with status information (i.e.,
ORAL or RECTAL probe indicators) to a DIGITAL signal. The Main Board then
processes the DIGITAL signal and displays the patient temperature on the UI
Board and printer in Celsius or Fahrenheit.
Host Communication Port
The Host Comm Port is used to interface the ProCare Monitor with other
electronic devices (a central nurse's station or remote alarm device.) Signals can
be sent to the ProCare Monitor to initiate blood pressure determinations and
other functions. Patient data can also be retrieved through this port. For further
information, reference the DINAMAP Host Communication manual.
Functional Description
The following paragraphs provide the functional interface relationship. The
ProCare Monitor contains a number of electrical & electro-mechanical
assemblies. These assemblies are:
„
Main Board PWA
„
User Interface (UI) Board PWA
„
SPO
2
PWA (optional)
„
Printer (optional)
„
Pneumatic Valve/Manifold (PVM)
„
Optical Switch (optional)
Main Board PWA
The ProCare Main Board is based on the Motorola MMC2107 integrated
microprocessor. The microprocessor integrates Flash ROM, RAM, A/D converter
with input multiplexer, SPI interface, and timers into one chip. This
microprocessor is the primary processor for the ProCare Monitor. It services and
controls the Patient Parameter Interface (PPI) devices, printer, UI Board, Real
Time Clock, audio circuit, and host communication. The secondary processor
controls the watchdog, pneumatic safety interlock, timing check, primary
processor reset, and power supply control. The secondary processor is powered
at all times.
Independent software in the primary and secondary processor periodically
communicate when the software systems are operating properly. When either
system stops processing or detects an error, it stops communicating with the
other. Either system, upon detecting a failure, can assert a safe state (herein
called FAILSAFE) of the hardware.