Hioki 8835-01 - Page 380

APPENDIX10
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Appendix 3 Reference
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A
ppendix 3.5 RMS Recorder Function
-141 V
Two-period
100 Vrms
141 V
Sample the 50 Hz or 60 Hz waveforms at
2
00μs and calculate one RMS value item
u
sing two-period data.
[
Two-period ]
5
0Hz：40 ms 200 sampling data
60 Hz
：
33.4 ms 167 sampling data
1234･･････
･
･･･････10
0
1 min/DIV
Maximum voltag
e
Minimum voltag
e
One piece of sample dat
a
：RMS-value data (20 x 60 [s/division]/100 = 12
)
・For the RMS recorder function, the sampling period is fixed to 20 RMS
value data items per second.
・One division is equal to 100 samples.
Calculate one RMS value
(1) Time axis: 5 s/division
Since the sampling period is fixed to 20 RMS-value data items per second, 5
s/division provides 100 RMS-value data items per division. This value is in
agreement with 100 samples per division and, therefore, the voltage axis does not
have a width (upper and lower limits).
(2) Time axis: other than 5 s/division
The maximum and minimum values are specified based on the RMS-value data
(by multiplying 20 RMS-value data items per second by the time-axis range
[s/division]/100), and the data containing these maximum and minimum values are
defined as one item of sample data. When the time-axis range is set to 1
mm/division, the maximum and minimum values are specified in the RMS-value
data (20 x 60 [s/division]/100 = 12), and the data containing these maximum and
minimum values are defined as one item of sample data.