Ecg Patient I/O Module Specifications; Isolation - GE Vivid q N Service Manual

GE
D FQ091019, R
IRECTION
5-8-2

ECG Patient I/O Module Specifications

5-8-2-1 Power Consumption
The ECG and Ext-ECG modules use 5 V (taken from the USB socket on the host).
Estimation: 80mA for ECG function and 50mA when working with EXT-ECG function.
5-8-2-2 Sample Rate
Sampling rate of the ECG signals is: 600 samples/second.
5-8-2-3 Bandwidth
The ECG Bandwidth is 0.05 to 150Hz.
5-8-3

Isolation

The ECG signals are isolated from the Vivid q N system to comply with IEC601-1 type CF device
classification. All leakage and auxiliary currents apply the values listed in
table IV in IEC601-1, section 19.3):
Table 5-12
Leakage Current
Earth leakage current
Enclosure leakage current
Patient leakage current
Patient auxiliary current
The ECG signals have double, reinforced isolation (B-a) from live parts. Hence, creepage distance and
air clearance in the module are 8 mm and 5 mm respectively, to withstand 4000 volts isolation between
applied part and grounded part.
The applied parts and enclosure have basic isolation (B-a).Therefore, creepage distance and air
clearance in the module are 4 mm and 2.5 mm respectively, to withstand 1500 volts isolation between
applied parts and enclosure.
5-40
2
EVISION
Leakage and Auxiliary Current Values
Normal Condition
Section 5-7 - Monitor and Operator Panel
Single Fault Condition
0.5mA
0.1mA
0.01mA
0.01mA
V
IVID Q
Table 5-12
1mA
0.5mA
0.05mA
0.05mA
N S M
ERVICE ANUAL
below (taken from