Fluke 434-II/435-II/437-II
Users Manual
22-4
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 of the Trends are auto ranging for a good display in almost al cases. If
desired, you can change Offset and Span of active measurements. Press in sequence:
the SETUP key, F4 – MANUAL SETUP, F1 – TREND SCALE. Use the up/down arrow
keys to select the item to be adjusted and the left/right arrow keys to adjust. There are
separate adjustments for PHASE and NEUTRAL (to be selected with Function key F3).
See Chapter 24 for more information.
Events
To access the Shipboard V/A/Hz Events screen:
f
F4
The Events table lists all threshold crossings of phase voltages. Thresholds according to
international standards or user-definable thresholds can be used. Threshold adjustment is
reached via the SETUP key and Limits. For detailed information see Chapter 23, Limits
Adjustments.
In Normal mode major event characteristics are listed: start time, duration, and voltage
magnitude. Detail shows details of threshold crossings per phase.
The following Abbreviations and Symbols are used in the tables:
Abbreviation Description Symbol Description
CHG Rapid Voltage Change Rising voltage edge
DIP Voltage Dip Falling voltage edge
INT Voltage Interruption
Change upwards
SWL Voltage Swell Change downwards
TRA Transient
AMP Amp value exceeded
Available function keys:
F1
Switch to wave event display: this will show a scope
waveform around the selected event.
F2
Switch to rms event display: this will show the ½ cycle rms
trend around the selected event.
F3
Switch between NORMAL and DETAILED event table.
F4
Return to Trend screen.
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