GE b30, Technical Reference Manual

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B30 Patient Monitor
1-28
Document no
.
2044677-001
3.3.2 Digital and analog outputs
Digital outputs
There are separate digital outputs. Both signals use TTL-level. The outputs are: Defibrillation
Sync. and Nurse Call.
Defibrillation Sync (X5, pin1) indication is generated by ECG. When active, the signal is in state
1. After 10 ms the signal is reset to state 0. New Defibrillation Sync is not generated before the
indication is deactivated. The delay from the R wave peak to the start of the signal is maximally
35 ms.
Nurse Call (X8, pin 8) indication is generated by red and yellow alarms. When activated, it is
set to state 1 and remains at that state until the alarm situation is over or SILENCE ALARM key
is pressed.
The range of state 0 is from 0 to 0.5 V, and the range of state 1 is 3.5 to 5 V.
Analog outputs
The B30 produces two analog real-time signals.
NOTE: When the source of the selected analog output is invalid (e.g. invasive pressure channel
is not zeroed), or becomes invalid (e.g. ECG lead is disconnected), the signal on the output is
shown as flat line (0 VDC).
Direct ECG (X5, pin 8): Delay (max.): 15 ms
Gain ECG (out)/ECG (in): 1 V/1 mV ± 10%
Pacer pulse width:: 2 ms ± 20%
Pacer pulse amplitude: 5V ± 10%
The signal requires input impedance of 100 k
Ω.
Invasive pressure signal (X5, pin 7):
From pressure labelled ‘Art’
Delay (max.): 35ms
Gain Signal (out) / Pressure (in): 10 mV/mmHg
Pressure area -4 to 320 mmHg
The signal requires input impedance of 100 k
Ω.