Fluke 41B Benutzerhandbuch
39/41B
Users Manual
34
A linear load with no phase shift.
A linear load with phase shift. A narrow ellipsoid in
this pattern usually does not mean there is a
problem. For wider ellipsoids, check power factor
(PF). If the ellipsoid is backwards (upper left to
lower right), check that you have pointed the
current probe in the right direction.
this pattern usually does not mean there is a
problem. For wider ellipsoids, check power factor
(PF). If the ellipsoid is backwards (upper left to
lower right), check that you have pointed the
current probe in the right direction.
A nonlinear load, usually resulting from pulse-type
power supplies.
power supplies.
A nonlinear load resulting from a 3-phase (six
pulse) rectifier power supply.
pulse) rectifier power supply.
A linear load that is 180 degrees out of phase. A
Current Probe pointed in the wrong direction or
reversed polarity voltage leads can cause this
indication. This incorrect alignment will also cause
negative power readings.
Current Probe pointed in the wrong direction or
reversed polarity voltage leads can cause this
indication. This incorrect alignment will also cause
negative power readings.
A combination of harmonic content and phase shift
of the fundamental frequency.
of the fundamental frequency.
A pattern indicative of a silicon-controlled rectifier
(SCR) power supply.
(SCR) power supply.
a14c.eps
Figure 15. Typical VA Check Signatures