9
（
2
）
Principle block diagram is shown in Figure 4-1.
Figure 4-1 Block diagram of control unit
4.2 Name of each part and its function
4.2.1 Front view
Figure 4-2 Front view
1.
Paper compartment cover
Keep the paper compartment closed, hold the printing paper
2.
Display screen
Display patient’s ECG and related information
3.
Button area
Control the operations of the device, and enter information.
4.
Cover switch
To open or close the paper compartment cover.
Note
Ø
Do not put heavy objects on the screen or hit against it, otherwise the screen will be
damaged.
Ø
If the device is not in use, cover it to prevent liquid spills on the screen.
C
ontrol system
S
ignal acquisition
s
ystem
D
isplay system
B
utton system
P
rinting system
P
ower module
4
2
1
3
