E600
Electrocardiograph
The E600 is an interpretive electrocardiograph capable of analyzing 10 full seconds of data from all 12 leads simultaneously and providing an interpretation in 3 seconds. The actual waveform for a desired lead can be viewed on the liquid crystal display while the EKG is being taken. The E600 uses a thermal array writing system to provide electrocardiograms in standard 3, 4, or 6 channel formats. Also, the E600 is capable of communicating patient EKG files either directly or via telephone lines to another E600, E500, or E-Scribe system.
POWER SUPPLY
A nicad battery and associated circuitry located
on the Power Supply PCB provides isolated
power for the Logic and Display PCB's.
The battery is recharged whenever the E600 is
plugged into an AC line and the power switch
ON. The Power Supply PCB also generates
operating voltages for the rest of the system.
These voltages include the +5V logic supply,
isolated +5V, and ±12V supplies for the analog
circuitry.
DATA ACQUISITION AND LOGIC
EKG data acquisition and interpretation is
accomplished by the Logic PCB, a sophisticated circuit board utilizing advanced technology
and hybrid circuitry.
Under the control of an 8-bit microprocessor, analog EKG input signals are sampled, buffered, and amplified before being converted to digital levels for further processing and interpretation. The Logic PCB also generates the necessary signals for serial communications to the Thermal Array Controller PCB.
DISPLAY
The microprocessor sends commands to a
LCD controller IC. The appropriate biasing
and display information is routed to an Epson
display board, which in turn, drives the
Liquid Crystal Display.
THERMAL ARRAY CONTROLLER
The Thennal Array Controller PCB communicates
with the Logic PCB through isolated
lines. The circuitry on this board makes use of
a microprocessor and memory to control the
thermal writing process. Sensors provide
input for paper queuing, printhead temperature
monitoring, and paper drive motor control.
Also, the necessary circuitry for isolated
serial communications with a modem is located
on this board.