MI 2792 PowerQ4 Plus
Operating the instrument
47
If “Trigger source” is selected, change Trigger source.
If SIGNALS dialog box is open, scroll through all channels.
If “Store buffer” is selected, change Store buffer size.
If “Pre – trigger length” is selected, change pre – trigger buffer size.
Open SIGNALS dialog box (if “Signals” is selected). In this dialog box the
individual signals can be selected for recording.
Return to the “RECORDERS” menu screen or close the SIGNALS dialog
box (if the dialog box is open).
3.10.2 Capturing waveform
Following screen opens when a user starts the waveform recorder.
Figure 3.34: Waveform recorder capture screen.
Table 3.42: Instrument screen symbols and abbreviations
Current instrument status:
Instrument
is
waiting for trigger to happen.
Instrument is recording (beep indicates that trigger limit has been
reached.
Instrument is busy (saving data to memory).
Current instrument time
Up
p: [1..3, N]
True effective value of phase voltage:
U
1Rms
,
U
2Rms
,
U
3Rms
,
U
NRms
Upg
p,g: [1, 2, 3]
True effective value of phase-to-phase (line) voltage:
U
12Rms
,
U
23Rms
,
U
31Rms
Ip
p: [1..3, N]
True effective value of current:
I
1Rms
,
I
2Rms
,
I
3Rms
,
I
NRms
Thd
Total harmonic distortion for displayed quantity (THD
U
or THD
I
)
f
Frequency on reference channel
Table 3.43: Keys functions
Manually generate trigger condition (Active only if Manual
trigger is selected and recording is in progress).
Select which waveforms to show:
Show voltage waveform;
Show current waveform ;
