Tips And Hints - Fluke 434-II User Manual

In the Start menu you can choose a trigger event or a combination of trigger events,
transients (Volt) and current (AMP) trigger level, and Immediate or Timed start of the
measurement.
The Analyzer can be set up to capture waveforms each time it sees: Voltage Transient,
Voltage Swell, Voltage Dip, Voltage Interruption or Current swell. Dips (sags) and
swells are fast deviations from the nominal voltage. The duration of a transient must be 5
microseconds or more. The display window showing the transient is 4 cycles. A total of
50 or 60 (50/60 Hz) cycles will be captured. The cursor can be used to scroll these.
During a dip the voltage sinks, and during a swell the voltage rises. During an
interruption the voltage falls to only a few percent of its nominal value. A current swell is
a current increase from one cycle to several seconds in duration.
Trigger criteria such as threshold and hysteresis are adjustable. Criteria that are also used
for Power Quality Monitor: this adjustment can considered as default setup and is
reached via the SETUP key, F4 – MANUAL SETUP, use the up/down arrow keys to
select 'limits' and press ENTER. Adjustment for transient level dV/dt and Arms are
available in the Start screen.
Cursor and Zoom can be used to investigate details of captured waveforms.
Available function keys:

Tips and Hints

Disturbances such as transients in a power distribution system can cause malfunctions in
many types of equipment. For example, computers may reset and equipment subjected to
repeated transients can eventually fail. Events occur intermittently, making it necessary to
monitor the system for a period of time to find them. Look for voltage transients when
electronic power supplies are failing repeatedly or if computers reset spontaneously.
info@Fluke-Direct.ca
Up/down arrow keys are assigned to scroll Trend screen.
F1
Access to cursor and zoom menu.
F2
Access 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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