Hioki 8841 Instruction Manual page 458

APPENDIX 14
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(10) Rise time
(11) Fall time
(12) Standard deviation
(13) Area value
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Appendix 3 Reference
・From the captured waveform data, the 0% and 100% level is determined,
and the rise time (s) is taken as the time required to go from 10% to 90%
(fall time: from 90% to 10%).
・In the captured waveform data, the first rising slope (or falling slope) is used
to make the calculation.
・If the A･B cursors (vertical, trace) are used, the first rising slope (or falling
slope) within the range defined by the cursors is used.
90%
10%
Calculates the standard deviation (V) of the waveform data.
n
Σ
di - AVE)
= { (
σ
i = 1
standard deviation
σ
AVE effective value
n number of data samples
di i-th data of the source channel
･ Calculates the area bordered by the signal waveform and the zero position
(potential 0 V).
･ If the A･B cursors (vertical, trace) are used, the area between the cursors is
calculated.
n
Σ
di|･h
S = |
i = 1
S Area value
n number of data samples
di i-th data of the source channel
h＝Δt sampling period
A cursor
Rise time
/n}
2
B cursor
Fall time
Shaded area is calculated