Hioki Power HiTester 3193, Instruction Manual

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4.4 Effective Value (RMS) or Mean Rectified Value (MEAN) Selection
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A
44-1.tif
44-2.tif
RANGE
U
I
SHIFT
F1 F2
UNIT
RMS/MEAN
NOTE
4.4 Effective Value (RMS) or Mean Rectified Value
(MEAN) Selection
For voltage and current measurement, this unit has two different rectification
circuits, which can be selected according to the signal being measured.
Switching for each channels on MEAS screen
・ To switch the voltage, press the SHIFT key, and
then press the + key on the U side.
・
To switch the current, press the
SHIFT
key, and
then press the
+
key on the I side.
Switching on the STATUS screen
1. Press the
STATUS
key, then use the
PAGE
( )
keys to display the "
UNIT
" page.
2. Using the CURSOR keys, move the cursor to the
channel to be changed of the " U " or " I " item.
3. Select
F1
(RMS)
or
F2
(MEAN)
.
4. Press the MEAS key to return to the measurement
screen.
･ Display of "RMS" or "MEAN" following the unit RMS and MEAN values
are distinguished by displaying "RMS" or "MEAN" following the unit, as
appropirate. However, these labels do not appear in the DC mode.
･
The formulas for RMS and MEAN calculation depend on the option.
･
For channel combinations of 1P3W and above, the channels are forced to the
same rectification method, but distinct settings can be made for voltage and
current.
･
The RMS and MEAN values agree when the input is a perfect sine wave,
but do not agree for a distorted waveform.
･
Whichever of RMS and MEAN is selected, this has no effect on the active
power (
P ), but does affect the internally derived apparent power ( S ), reactive
power ( Q ), power factor (
λ
), and phase angle (
φ
).
･
In DC mode the RMS/MEAN selection is not available.