Tips And Hints - Fluke 434-II User Manual

Cursor. When the Cursor is on, the Trend values at the Cursor are displayed in the screen
header. Moving the Cursor off the left or right side of the screen brings the next of six
screens into the viewing area. This functions in HOLD mode only.
Zoom. Allows you to expand or shrink the display vertically or horizontally to view
details or to fit a complete graph within the screen area. Zoom and Cursor are operated by
the arrow keys and explained in Chapter 23.
Offset and Span are auto ranging for a good display in most cases, but they are
adjustable. The adjustment menu is reached via the SETUP key, F4 – MANUAL SETUP,
F1 – TREND SCALE. The lamp model can be adjusted via the SETUP key, F4 –
MANUAL SETUP, F3 - FUNCTION PREF. Use the up/down arrow keys to select
Flicker Lamp model and the left/right arrow keys to select the desired model. See
Chapter 24, FUNCTION PREFerences.

Tips and Hints

Use instantaneous flicker (Pinst) trend and half-cycle voltage or current trends to find the
source of flicker. Use the arrow keys to select flicker, voltage, and current trends.
The 10 min (Pst) uses a longer measuring period to eliminate the influence of random
voltage variations. It is also long enough to detect interference from a single source with
a long working cycle such as electrical household appliances, and heat pumps.
A measuring period of 2 hours (Plt) is useful when there may be more than one
interference source with irregular working cycles and for equipment such as welding
machines, and rolling mills. Plt ≤ 1.0 is the limit used in standards like EN15160.
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Return to Meter screen.
F3
Access to Events menu. The number of events that occurred
F4
is shown.
Switch between HOLD and RUN of screen update.
F5
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.
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