HFG02 Operation Manual
York EMC Services
Page 12 of 25 Doc. No. Y0321/DOC/024 Rev. 3
5.2 Supplying power to the HFG02
Figure 2: HFG02 power supply
The HFG02 is powered by an external 24 Vdc power supply unit which connects
to the input socket on the front panel . Pressing the power switch
with the
24 Vdc unit connected will turn the HFG02 on, which will be confirmed by the
green indicator . Pressing the power switch again will turn the HFG02 off.
5.3 Operating modes
Figure 3: HFG02 mode selection
The operating mode is selected using the Test Mode switch
. The operation of
each test mode is described in Table 1 below. Note that if the Test Mode switch is
changed whilst a test is running, the test is automatically disabled.
Mode
Test Mode Setting Load Profile Description
Flicker
8.3/8.6 Hz
Produces Pst value of > 1
(above the pass limit defined in EN/IEC61000-3-3)
1 Hz
Produces Pst value of < 1
(below the pass limit defined in EN/IEC61000-3-3).
Harmonics
Fixed
Single repetitive harmonic-rich current waveform
Fluctuating
Repeating current profile alternating between two distinct
waveforms over a 10 second cycle
Fixed + 10 Hz
Fixed harmonic waveform with additional 10 Hz
interharmonics
5 Hz
Fixed interharmonics at frequency steps of 5 Hz
10 Hz
Fixed interharmonics at frequency steps of 10 Hz
EUT
Half-wave rectifier
Simulates the effect of a half-wave rectified mains input
Dimmer
Simulates the waveform of an analogue dimmer switch
Intermittent flicker
Simulates the effect of a varying duty cycle load
Table 1: HFG02 load operation test modes