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CHAPTER 3. FRONT PANEL OPERATION
18
M
n
the nth measured data.
k
attenuation constant (1-64)
3.5.2
Linear averaging
D
n
linear average of m values from the
(
n
−
(
m
−
1))
th
to
n
th
value
M
n
−
(
m
−
1)
(
n
−
(
m
−
1))
th
measured data
M
n
−
2
(
n
−
2)
th
measured data
M
n
−
1
(
n
−
1)
th
measured data
M
n
n
th
measured data
M
the number of average values (1-64)
When m can be divided exactly by n, the calculated value is the moving average; when there is no particular
relationship between m and n, the calculated value is the repeated average.
When index averaging is set, averaging is implemented under the harmonic measurement
function.
When linear averaging is set, averaging can only be implemented in the conventional
measurement function and this mode is not applicable to the harmonic
measurement function.
3.5.3
Averaging function
Measurement function in conventional measurement.
The following measurement functions are subject to direct averaging. Data of the following measurement
functions are obtained via operation in other modes, and the obtained measurement function is affected
averaging.
1.
Urms, Umn, Udc, Urmn, Uac, Irms, Imn, Idc, Irmn, Iac, P, S and Q.
2.
Ucf, Icf,
λ
and WPAV are calculated by operation of the averaged Urms, Irms, P and S.
3.5.4
Measurement function in harmonic measurement
The following measurement functions are subject to direct averaging. Data of the following measurement
functions are obtained via operation in other modes, and the obtained measurement function is affected
averaging.
1.
U(k), A(k),W(k), S(k) and Q(k).
2.
λ
(
k
)
is calculated via operation of the averaged W(k) and Q(k).
3.
U(%r), A(%r), W(%r) , U(%f), A(%f) and W(%f) are calculated via operation of the averaged U(k), A(k) and
W(k). (k indicates the harmonic times.)
When the averaging function is enabled, the average of a number of measurements are calculated and displayed.
Therefore, in case of drastic changes of the input signal, the measured value will slowly affect these changes.
For both the attenuation constant of index averaging and the number of averaged values of linear averaging, the
larger the set value is, the more stable the measured
value is.