Fluke 434 User Manual download pdf (Page 65)

Inrush Currents

Inrush Trend Display15

15-3

THRESHOLD

(= TRIGGER)

}

HYSTERESIS

pretrigger

DURATION

inrush time

35 s

12.3 A

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:

Assign up/down arrow keys to select a set of trends for

display.

Cursor on/off.

Assign arrow keys to Cursor or Zoom operation.

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.

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Fluke 434 User Manual Page 65