Tips And Hints - Fluke 434 User Manual

The following Abbreviations and Symbols are used in the tables:
Abbreviation
CHG
DIP
INT
SWL
Available function keys:
F3
F4
F5

Tips and Hints

The occurrence of Dips (Sags) and Swells may indicate a weak power distribution
system. In such a system voltage will change considerably when a big motor or a welding
machine is switched on or off. This may cause lights to flicker or even show visible
dimming. It may cause reset and loss of data in computer systems and process controllers.
By monitoring the voltage and current trend at the power service entrance, you can find
out if the cause of the voltage dip is inside or outside the building. The cause is inside the
building (downstream) when voltage drops while current rises; it is outside (upstream)
when both voltage and current drop.
Description
Rapid Voltage Change
Voltage Dip
Voltage Interruption
Voltage Swell
Switch between NORMAL and DETAILED event table.
Return to Trend screen.
Access Trend screen with Cursor on and positioned on the
highlighted event.
This event can be selected with the up/down arrow keys
Symbol Description
Rising voltage edge
Falling voltage edge
Change upwards
Change downwards
9
Dips & Swells
Tips and Hints
9-5