17
and right key of mouse to clear all marks and data;
11.
Press
key or click the middle mouse to unfreeze, clear all marks and data and quit the
measurement status.
Circumference/area measurement with trace method
1.
In B, B/B mode, freeze desired image, the cursor is located in the “Measure” position of display
area;
2.
Press key, the measurement methods are showed in the lower left of the screen, press direction
keys
to choose “Trace”, press key again, the cursor will show “+”; or click left mouse, the
cursor will show “+”;
3.
Press direction keys or operate mouse to move the “+” mark to desired position, press key or
click left mouse to set the “+” mark position as the starting point of the measurement; or click right
mouse to set the “+” mark position as the starting point of the measurement;
4.
Press direction keys or operate mouse to move the“+” mark to the end point of the measurement.
At the same time, a locus appears in the direction of operation between the two measurement
marks. The measured circumference value is displayed automatically at the built-in mark “C:
00000mm” on the right part of the screen. Press key or click right mouse to display at the
built-in mark “A: 00000mm
2
” the value of the measured area formed by measurement line
enclosure;
5.
Press key, the measurement methods are showed in the lower left of the screen, continue to
choose “Trace” to measure;
6.
Repeat steps 3, 4 to complete the multi-group data measurement;
7.
Continuously press key twice to quit the measurement status;
8.
Press direction keys
to choose “Clear” and then press key or synchronously click the left
and right key of mouse to clear all marks and data;
9.
Press
key or click the middle mouse to unfreeze, clear all marks and data and quit the
measurement status.
7.3 Slope/Heart rate/Cycle Measurement
The method to measure slope/hear rate/cycle is identical with distance measurement.
Note: In B/M mode, if both starting point and end point of the measurement mark fall into the
B-mode area, the value of the “+: ”refers to distance; if starting point and end point of the
measurement mark fall into the M-mode area, the value of the “+: ”refers to depth; if the
starting point and end point are in separate areas, the “+: ”will display “----”sign or invalid
value.
＋
: denotes depth measured in mm (millimeter)
EF: denotes slope coefficient measured in mm/s (millimeter per second)
HR: denotes heart rate measured in times/minute (times per minute)
T: denotes cycle measured in ms (millisecond)
Attention:
The accuracy of software measurement: distance measurement
≤
1mm;
area measurement
≤
1mm
2
; volume measurement
≤
1cm
3
; heart rate measurement
≤
1bmp; time measurement
≤
1ms. Due to differences in images obtained by each user in
different times, the actual object for the accuracy of the measurement may be greater
than the above-mentioned values.