GE b30 Technical Reference Manual

B30 Patient Monitor
1-34
Document no. 2044677-001
Figure 19 ECG measurement block diagram
ECG input unit
The ECG input unit consists of the front panel connector and the ECG input connector board
with the high voltage protection resistors. The connector for the ECG cable is a green 11-pin
rectangle shaped connector.
Input protection and filtering
The input protection is implemented with high voltage protection resistors in the ECG input unit
and with protection diodes in the ECG board. The input filtering for ECG measurement is done
with passive RC filtering.
ECG preamplifiers
The buffer amplifiers are used for each lead. The “Leads off” detection is implemented by
measuring the output level of the input buffer amplifiers with the A/D converter of the CPU. The
ECG signals are measured using differential amplifiers.
PATIENT AND ECG ELECTRODES
ECG CABLE
- ECG LEAD SET
- ECG TRUNK CABLE
ECG INPUT UNIT
- ECG CONNECTOR
- INPUT PROTECTION RESISTORS
INPUT PROTECTION DIODES FOR ECG & RESPIRATION MEASUREMENT
INPUT FILTERING FOR ECG & RESPIRATION MEASUREMENTS
RESPIRATION
MEASUREMENT
AMPLIFIERS
BASELINE
RESTORATION
ECG CPU
RESPIRATION
MEASUREMENT
CURRENT SUPPLY
ECG
PREAMPLIFIERS &
RLD CIRCUIT
LEADS OFF &
PACER &
DEFIBRILLATION
DETECTION
RS 485
COMMUNICATION
POWER SUPPLY
NV
MEMORY
ISOLATION ISOLATION
MODULE BUS CONNECTOR
ECG BLOCK DIAGRAM
12_lead_ECG_meas_blck_dgrm.vsd

GE b30 Specifications

General

Model	b30
Manufacturer	GE
Coil Voltage	N/A (Solid State Relay)
Coil Power	N/A (Solid State Relay)
Mechanical Life	N/A (Solid State Relay)
Electrical Life	N/A (Solid State Relay)