GE Dash 3000, Service Manual

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9-20 Dash 3000/4000 Patient Monitor Revision A
2000966-339
Assembly Drawings: Theory Of Operation
Handle Subassembly
The handle serves multiple purposes in the monitor. The modular design
enables the user to add adapters for specialized applications.
The Dash 3000 handle houses the optional alarm light. This light is
visible for 360° surrounding the monitor. The light is intended for
applications when the audible notification is not useful or effective, such
as noisy environments (e.g., emergency vehicles) or quiet environments
(e.g., neonatal care areas). The alarm light indicates two levels of visual
alarms:
„
Crisis alarms (red LED) and
„
Warning alarms (amber LED).
The handle also houses the two RF LAN antennas required for the
optional RF LAN subsystem.
Interfaces
Ethernet
The Ethernet RJ-45 connector provides a hardware connection to the
optional Unity Network. The monitor has a built-in transceiver for
twisted-pair wire. Basic insulation (1500 VAC) isolates the monitor from
networked devices.
AUX
The AUX RJ-45 connector provides an asynchronous communication
connection to devices within the bedside care area. Basic insulation (1500
VAC) isolates the monitor from other devices.
Defib Sync
The Defib Sync connector provides signals needed to perform
synchronized cardioversion with a defibrillator. The Marker Out signal is
a pulse with selectable amplitude and width that coincides with the
patient’s ECG R-wave. The Marker In signal is returned to the monitor
by the defibrillator. The Marker In signal causes the monitor to insert a
defib marker in the displayed ECG waveform.
This connector also provides two analog signals: ECG and invasive
pressure. The monitor provides the top displayed ECG signal with
reconstructed pace pulses. You can use this signal to trigger a
defibrillator or intra-aortic balloon pump. BP1 produces the pressure
signal and is intended for triggering an intra-aortic balloon pump.