Fluke 434 - Manual (Page 65)

Inrush Currents
Inrush Trend Display
15
15-3
THRESHOLD
(= TRIGGER)
}
HYSTERESIS
pretrigger
DURATION
inrush time t 35 s
1 12.3 A
2 12.3 A
3 1.5 A
rms during inrush
MAXIMUM AMPS
zero
Figure 15-1. Inrush characteristics and relation with start menu
Use Cursor and Zoom to investigate details of the recorded Trends. Selection of channels
to be displayed is done with the up/down arrow keys. Press function key F1 to assign the
arrow keys to this.
Via the SETUP key and function key F3 - FUNCTION PREF you can set up the default
values of the trigger limits (expected inrush time, maximum current, nominal current,
threshold, hysteresis) and Offset and Span of the Trend display. For detailed information
see Chapter 18, FUNCTION PREFerences.
Available function keys:
F1 Assign up/down arrow keys to select a set of trends for
display.
F2 Cursor on/off.
F3 Assign arrow keys to Cursor or Zoom operation.
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.