User Documentation

145
Devices – Energy Analyser 550
2008050000/03/02-2018
INFOBEREICH
Die Angabe „MatNr/Version/Datum“ bzw. „1234560000/00/MM.YY“ ist als Textvariable deniert
und kann nur auf der „Rueckseite“ editiert werden. Die Textvariable erscheint in allen Doku-
menten dieses Buches, sobald eine Synchronisierung des gesamten Buches(!) durchgeführt
wird. ACHTUNG Die „Rueckseite” muss als Formatquelle(!) ausgewählt sein!
• The mean value measurement timeframe is established by the time set under “Time basis”.
• Measurement values are saved once the time set under “Time basis” has run its course (Data memory
capacity calculation using Energy Analyser D550 as example).
Settingup/editingarecordingconguration
• An individual recording instance can be set up using the New or Edit buttons.
• Measurement values are selected in the recording window using the Add values button.
• Todosodragthedesiredmeasurementvalue(measurementvaluegroup)overthevalueeld.The
measurement values are adopted and displayed.
• The selected measurement values can be described in more detail via the option “Mean (arithmetical)”,
“Mean (RMS)”, “Minimum”, “Maximum”, “Sample” and “With value change”.
- Mean (arithmetical)
The arithmetical mean is the ratio of the sum and the number of all 200 ms measurement values:
x(arithm.) = (x1+x2+x3...) / n
- Mean (rms)
This value describes a quadratic mean (potential mean) with: x (rms) = root ((x12+x22+x32+..) / n)
- Minimum / Maximum
When these buttons are selected, the means of the minimum and/or maximum values are recorded.
- Sample
Sampledescribestherecordingofthemeasurementvaluewithinthedenedtimeduration.Thetime
baselinedenesthetimeintervalsatwhichtherecordingismade.
• With value change
If the measurement value is changed, the 200 ms measurement value is recorded. This setting is useful
for, for example, the monitoring of digital inputs and outputs (not with high frequency signals) or of the
temperature input.
In contrast to the arithmetical mean, the quadratic mean is of increasing importance when the measurement
valuesvarygreatlycyclically.Outliersinthemeasurementvaluesthushaveagreatersignicance.Witha
value like voltage, it is a good idea to take this more into account than for a power value.
• Using the Delete values button, selected measurement values can be deleted.
EN 50160 and EN 61000-2-4 presettings selection aid
• ViatheEN50160andEN61000-2-4buttons,predenedrecordingsettingscanbemade.
• If the device does not support measurement as per EN 50160, a prompt is issued.
4.4.3.16 Memory conguration
Conguringdatamemory
• The Energy Analyser 550 has a storage capacity of approx. 256 Mbyte.
• The data memory has been partitioned as follows ex works:
- 40%foruser-denedrecording.
- 22.5 % for the recording of transients.
- 22.5 % for the recording of full wave effective values.