Atria Service Manual
1-1
Chapter
1
General Information
About the Atria Electrocardiographs
The Atria ECG is a multichannel non-interpretive/interpretive
electrocardiograph. You operate the electrocardiograph by pressing
various keys on the keypad. A thermal printer makes hard copy
printouts of text and waveforms for permanent records.
The servicing of the Atria electrocardiograph is similar regardless of
which model you have. Some of the information in this Service Manual
applies only to options which you may or may not have installed in
your electrocardiograph. Unless otherwise specified, the information in
this Service Manual applies to the Atria electrocardiographs.
Basic System Description
A simple diagram of the system is shown in Figure . When AC power
is not connected, an internal 14.4 V NiMH battery provides power for
all functions. This battery is recharged whenever the AC line is
connected.
The ECG data is acquired by hybrid circuits and sophisticated software
on the Logic board. Under microprocessor control, the
electrocardiograph samples, buffers and amplifies the analog ECG
signals before converting them to digital levels for further processing.
Input/output control circuitry handles communication with the front
end ECG signals, LCD (liquid crystal display), membrane switches,
thermal printer and external devices (if equipped).
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