Impedo
DUO
User Guide
19
Please refer to the Osprey Lite
TM
user manual for more information on 1/6
th
cycle
data.
2.3.8
Event Recording
Users can customise the recording of an event. The IEC 610000-4-30 definition of for
example a dip event, can be changed to improve the understanding of phenomena of
concern.
Upper and/or lower thresholds to define an event can be set by the user based on
waveform, 1/6
th
sense, 10/12-cycle block and aggregated parameters.
Single-phase and multiple-phase triggers can be defined.
When a threshold is exceeded, the Impedo DUO will retain pre- and post-diagnostic
information of the event.
Please refer to the Osprey Lite
TM
user manual for more information on event
recordings.
2.3.9
10/12-Cycle Block Recording
The Impedo DUO records all RMS and harmonic data from each 10/12-cycle block
(≈200ms block) for both voltage and current as prescribed by the Class A
performance requirements of the IEC 61000-4-30, edition 3.
These block values contain both amplitude and angle information of all voltage and
current harmonic components up to the 64
th
harmonic order.
Each block is time-stamped with a 1
s time resolution and within a 100 ns time
uncertainty
1
.
The user can average N x blocks to reduce the sampling rate for the number of blocks
up to 299 blocks
2
.
Please refer to the Osprey Lite
TM
user manual for more information on 10/12 cycle
block intervals and down sampling.
1
When GPS synchronized
2
Averaged block harmonic and unbalance phasors do not contain angle information.
Summary of Contents for Impedo DUO
Page 85: ...Impedo DUO User Guide 85 Figure 49 Export harmonic selection...
Page 109: ...Impedo DUO User Guide 109 Appendices 8 Impedo DUO dimensions...
Page 110: ...Impedo DUO User Guide 110 8 1 Panel mounting plates 8 2 19 installation plate...
Page 111: ...Impedo DUO User Guide 111 9 Impedo DUO wiring diagram...
Page 113: ...Impedo DUO User Guide 113 11 Portable ImpedoDUO...
Page 117: ...Impedo DUO User Guide 117 Screw driver USB with meter key Ethernet cable...
