23
60
20
40
30
10
20
4
0
2
6
8
23
60
20
40
30
10
20
4
0
2
6
8
23
60
20
40
30
10
20
4
0
2
6
8
23
60
20
40
30
10
20
4
0
2
6
8
ADD time-measurement mode
Start
Stop. Read off time. Start.
Stop. Read off time. Start, and so on …
Stop
The total time can be read off.
Reset to zero
