Atec Zimmer-Electronic-Systems-LMG95 - Manual (Page 3)

Electronic transformer
Electronic 12V transformer to supply a halogen lamp.
Amplitude modulated 150 kHz carrier with 100Hz envelope.
Burst firing control of a hot-air fan
Harmonic analysis
Flicker measurement
Amplitude spectrum with the help of the HRM100 harmonic analysis. The burst fire presents a 1.56Hz modulation of the carrier
(50Hz mains voltage). The DC component of the spectrum results from the blower motor in half-wave operation.
The extended “X-Trig” trigger mode detects the 1.56Hz periodicity which is used for synchronisation.
Using the plot function the half-
wave trms values U
l are plotted over
time (lower curve B).
Irregular sags of about 8V can be
recognised. The momentary flicker
Pmom resulting from these changes
is visualised in Curve A.
Switch-on current of a fluorescent lamp ballast measured in the transient mode
Switch-on current of a fluorescent
lamp ballast.
The iron is not saturated.
Inrush current of a transformer
In the moment when the currentless,
non-magnetised transformer is
switched on a multiple of the nominal
current is required to build up the
necessary flux. The iron goes rapidly
into saturation. Here I
inr /I trms =12.9.
gh Real-time Visualisation in the Time and Frequency Range.