MI 2892 Power Master
Operating the instrument
72
Moves cursor.
Toggles between sample value and true effective half cycle value at cursor position.
Toggles cursor between voltage and current (only in U,I or U/I).
Returns to the “MEMORY LIST” submenu.
3.16
Transient recorder
Transient is a term for short, highly damped momentary voltage or current disturbance. A transient
recording is recording with the 49 kSamples/sec sampling rate. The principle of measurement is similar
to waveform recording, but with higher sampling rate. In contrary to waveform recording, where
recording is triggered based on RMS values, trigger in transient recorder is based on sample values.
3.16.1
Setup
Figure 3.51: Transient recorder setup screen
Table 3.62: Transient recorder settings description and screen symbols
Transient recorder is active, waiting for trigger
Transient recorder is active, recording in progress
Trigger
Envelope: Trigger value is based on envelope within voltage/current
that is expected. As reference, voltage/current waveform from
previous cycle is taken. If current sample is not within envelope,
triggering will occur. See 5.1.20 for details.
Envelope
Previous
cycle
Current
cycle
Trigger
Envelope
Level: Trigger will occur if any sample within period is greater than
defined absolute trigger level. See 5.1.20 for details.
Trigger level
Trigger level
Type
U: Trigger on transients at active voltage (phase/line) channels
Un: Trigger on transients at Ground to Neutral voltage channel
I: Trigger on transients at active phase current channels
ENTER
