Fluke 434-II/435-II/437-II
Users Manual
10-4
Trend
To access the Harmonics Trend screen:
g
F4
Trend shows how harmonics and related parameters vary over time: Cursor and Zoom
can be used in HOLD mode to investigate trend details. All values in the Meter screen are
recorded, but the Trends from each row in the Meter screen are displayed one at a time.
Use the arrow keys to scroll the Trend screen.
Press in sequence: the SETUP key, F4 – MANUAL SETUP, F3 – FUNCTION PREF and
use the up/down arrow keys to select Harmonics measurement parameters and if
necessary adjust them with the left/right arrow keys. For detailed information see Chapter
24, FUNCTION PREFerences.
Available function keys:
F1
Up/down arrow keys are assigned to scroll the Trend screen.
F2
Access to cursor and zoom menu.
F3
Return to Meter screen.
F4
Access to events tables.
F5
Switch between HOLD and RUN of screen update.
Switching from HOLD to RUN invokes a menu to select
immediate (NOW) or TIMED start time which allows you
to define start and duration of the measurement.
Tips and Hints
The harmonic number indicates the harmonic frequency: the first harmonic is the
fundamental frequency (60 or 50 Hz), the second harmonic is the component with two
times the fundamental frequency (120 or 100 Hz), and so on. The harmonics sequence
can be positive (+), zero (0), or negative (-). The table below gives an overview.
Order 1st 2nd 3rd 4th 5th 6th
Frequency
60 Hz
50 Hz
120 Hz
100 Hz
180 Hz
150 Hz
240 Hz
200 Hz
300 Hz
250 Hz
360 Hz
300 Hz
Sequence + - 0 + - 0
Order 7th 8th 9th 10th 11th ...
Frequency
420 Hz
350 Hz
480 Hz
400 Hz
540 Hz
450 Hz
600 Hz
500 Hz
660 Hz
550 Hz
...
Sequence + - 0 + -
...
1.800.868.7495info@Fluke-Direct.ca
Fluke-Direct.ca
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