6.5 Selecting a Distortion Factor Equation
Procedure
1.
Press SETUP to display the Setup menu.
If the full Setup menu does not appear, proceed to step 2. If the full Setup menu appears,
proceed to step 4.
2.
Use the cursor keys to select Details.
3.
Press SET to display the full Setup menu.
4.
Use the cursor keys to select Harmonics.
5.
Press SET to display the Harmonics Settings dialog box.
6.
Use the cursor keys to select Thd Formula.
7.
Press SET to display the distortion factor equation selection box.
8.
Use the cursor keys to select 1/Total or 1/Fundamental.
9.
Press SET to confirm the selection.
Explanation
When determining the harmonic measurement functions Uhdf, Ihdf, Phdf, Uthd, Ithd, and
Pthd, you can select to use one of the denominators described below as the denominator
for the equation. For more information about the distortion factor equations, see appendix
1.
•
1/Total
The denominator is the measured data of all orders from the minimum measured
order (0 or 1
st
) to the maximum measured order (within the upper limit of harmonic
analysis).
•
1/Fundamental
The denominator is the data of the fundamental signal component (1
st
order).
Note
The minimum and maximum harmonic orders to be measured are the values selected in
section 6.3.
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