GE Dash 3000, Service Manual

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Revision A Dash 3000/4000 Patient Monitor 9-21
2000966-339
Assembly Drawings: Theory Of Operation
Peripheral Expansion
A port is provided for expansion. Asynchronous communication,
Ethernet (shared with the Ethernet RJ-45 connector), 9-18 V power, 5 V
power, and discrete I/O signals are provided in the interface. The
expansion connector pairs with the AC mains power inlet to supply
power to the monitor through a peripheral device.
Setup and Configuration
Program Code Storage
Executable program code for the main processor, DAS processor, and
thermal printer are stored in non-volatile programmable memory.
Program code can be changed via the AUX port using the PC-based
TCCM Update software utility or via the optional Unity Network
(Ethernet port) from a file server supporting the Xfiles protocol.
To display the revision of the currently stored code, access the submenu
of the main application’s Monitor Setup menu.
Monitor Settings
The processor/power management PCB stores default monitor settings in
non-volatile memory. The user must restore the original settings if
replacing the board.
Patient Data Storage
Static RAM backed up by a lithium battery soldered onto the processor/
power management PCB stores patient data.
Time and Date
The monitor maintains time and date for at least five years. Time is
accurate to within one second in ten hours. The clock is synchronized
with a time master on the optional Unity Network.
Calibration Data
Calibration factors for NBP and CO
2
are stored in non-volatile memory
on the DAS board.
Calibration factors for the analog output signals are stored in non-
volatile memory on the processor/power management PCB.