Std Harmonic Mode (En 61000-4-7 Ed 2.1 Compliant); View Harmonics - Fluke NORMA 4000 Operator's Manual

NORMA 4000/5000
Operators Manual

STD Harmonic Mode (EN 61000-4-7 Ed 2.1 compliant)

View Harmonics

1. Use function key Config to open harmonics setup screen. Press Enter and select STD
mode with the cursor keys. Press Enter to confirm.
2. Select number of cycles (N) per analysis interval (200ms @ nominal frequency).
Only settings of 10 (for 50 Hz) and 12 (for 60 Hz) are defined by the EN standard,
the other values (4, 6, 8) are provided for convenience to have a faster update rate
when analyzing lower frequency signals.
Analysis interval length = N / f
3. Select grouping mode according to EN standard:
none
harm
hgrp
hsgrp
isgrp
sgrp
THDs are calculated from harmonics or groups 2...40 according to
selected grouping mode, shown only in table view (relative % of H01)
(TIDS and THDT are not defined in EN standard).
8-28
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[sec]
sync
No grouping, basic spectral components (absolute RMS only, no THD)
Harmonic components Y (absolute or relative % of H01), THD
H,h
Harmonic groups Y (absolute or relative % of H01), THDG
g,h
Harmonic subgroups Y (absolute or relative % of H01), THDS
sg,h
Inter-harmonic subgroups Y
isg,h
Harmonic & inter-harmonic subgroups Y
THDT
Note
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(absolute or relative % of H01), TIDS
+ Y (abs. or rel. % of H01),
sg,h isg,h
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