GE Corometrics 250 Series User Manual

Revision D 250 Series Maternal/Fetal Monitor 2-19
2020551-001
Equipment Overview: Theory of Operation
Main Board/NIBP
The main board houses the central processor and is the focal point for all data in the 250. The board is responsible for the following:
•
Receives processed FECG, Ultrasound, UA, and MECG data from the DSP board.
•
Formats DSP data for display.
•
Passes display data to the DSP board display FPGA which in turns drives the LCD panel.
•
Writes the processed data to the recorder board.
•
Receives front panel keypad/trimknob data from the UI board.
•
Communicates parameter data to the rear panel communications ports.
•
Passes parameter telemetry data to the DSP board for processing.
•
Inputs keypad data from rear panel comm. Board and sends it to the recorder board.
•
Executes diagnostics
o
Reports its own main failures
o
Reports UI keypad and DSP failures
o
Recorder test pattern and display test pattern
o
Audio test pattern
•
Provides NIBP processing subsystem & communicat es to the external Pneumatics PWA.
DSP/Display Interface Board
The DSP/Display interface board forms the
b
ridge between the frontend parameters and
the main board central processor. It also has the function of display interface. It interfaces the Main board to the LCD panel by
p
roviding a dual port memory to the main
b
oard and a graphics engine driving the LCD
p
anel. The board is responsible for the
following:
•
Interfaces to front-end motherboard which holds the parameter boards.
•
DSP Processing of FECG, MECG, UA, and Dual Ultrasound data thus converting analog data to heart rates and pressure values.
•
Sending of processed data to main board.
•
Pass through of MSpO2 OEM module serial communication lines to the main board (no processing done by DSP).
•
Provides status of patient cables plugged in to monitor to the main board.
•
Drives the LCD display panel by generating the video graphics through the FPGA chip and sending data to the decoder board which then connects to the LCD display.
•
Interfaces the video to the main board processor through a dual port memory
•
Pass through of front panel serial comm lines to the main board
.
Digitally Processed
Analog Parameter
Data
Un-Processed Analog
Parameter Data From telemetr
y
Graphics Data
for display
Pass through
MSpO2 serial data
& Reset
Recorder Board
Interfaces main board serial data to recorder
p
rinthead
Provides regulated power to printhead Provides sensor data from recorder door, paper out & paper misload to main board
Pass through UI
Keypad serial data
Front-end
Motherboard
Connects front- end bds together distributing isolated power and un-isolated
p
ower.
Passes through all analog signals to the DSP board for processing.
FECG/UA Board
Converts fetal ECG to analog signal for processing Converts pressure signal to analog for DSP signal
p
rocessing
MECG Board
Converts 3 lead maternal ECG signals to analog signal for DSP processing
Dual Ultrasound Board
Provides doppler shift analog signals to DSP board
SpO2 Carrier Board
Carries MSpO2 modules connecting to FE mthbd
MSpO2
Module
Provides serial MSpO2 data to main board
Isolated Power Supply
Provides isolated power to all front-end boards excluding US
b
oard
All
Analog Signals
Telemetry
US data
UI Keypad
Passes all button closures and trimknob data to main bd via DSP board. Provides the chart light & key backlight function under main board control. Interfaces serially to the main bd.
Serial keypad
data cable
Comm Board
Interfaces ext keypad to main board Interfaces ext telemetry analog signals to main bd Interfaces legacy Spectra analog central station b
y
sendin
g
.
Telemetry
analo
g
si
g
nals
Keypad
signals
Analog HR
outputs
Analog HR signal
with Mode Info
Analog HR signal
with Mode Info
Lead selection,
Pacer enable, test
si
g
nal enable
Serial digital
MpO2 data
MSpO2 Resets
Serial digital
MSpO2 data
FECG + MECG Front panel Connector
FECG UA cables (2)
MECG
cable
Analog HR signal
with Mode Info
FECG & UA signals
Power for MspO2,
FECG, and MECG
boards
System +20 volts
for switching
Serial digital
MSpO2 data
MSpO2
Resets
UI Volume
Keypad
Holds volume & alarm cancel buttons
US1
Connector
US2
Connector
MSpO2 FP Connector Bd
UA Front Panel Connector
US1 cable US2 cable
MS
p
O2 cable
MSpO2 sensor data
Isolated
Isolated
Denotes Patient Isolated Sections
Video Decoder
Board
Translates 12
b
it color to 1 bit
color (2 colors)
LCD
Panel
320 X 240
Inverter
Module
Volume
data cable
Video Flex
data cable
DSP/Decoder
Video cable
DSP Inverter
Power cable
LCD Inverter
cable
(part of LCD)
Recorder Serial
data/status
Cable
System Power
Supply
+5, +12, +15, -15
To Main
Board
To Recorder
Board
Power Cables
Power Cable from
system power
supply
Power Cable from
system power
supply
Pneumatics
Board
Contains pump,
valves and filter
Denotes Plug-in connections
Isolated
Isolated
Isolated
Isolated
Isolated
Partially Isolated
Denotes cables
Isolated

GE Corometrics 250 Series Specifications

General

Brand	GE
Model	Corometrics 250 Series
Category	Medical Equipment
Language	English