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Power Quality Analyzer Model 3945-B
5.4.1 Opening Previously Stored Transients
The screen below can be accessed with the retrieve button. It displays a list
transients previously stored in the memory.
07/25/02 10:56 100
%
SELECTION OF TRANSIENT
TEST 05
TEST 04
TEST 03
TEST 02
TEST 01
05/07/02 14:31:41
05/07/02 14:31:41
05/07/02 14:31:21
05/07/02 14:31:04
05/07/02 14:31:04
1
2
3
Figure 5-16
NOTE: If the “@” symbol appears as the first letter of the recording name (e.g. @EST
05), the data may be corrupted and should be checked carefully.
Thestatusbaratthetopdisplaysthememorylledbystoredtransients.
Nameandtransientnumber(from01to50)foreachstoredtransient.
Transient recording time and date are displayed for each transient.
- To select a transient, press the
buttons, then select it with the
button
- To delete a selected transient, press the
button,thenconrmitwith
the
button
5.4.2 Storing the Trigger
ThethresholdTinpercent,denedasanenvelopewidth(overandunder)thelast
cycle of signal V or A input signal. Its width W is calculated with the nominal mea-
surementrangeRforachannel(dependingontheselectedcurrentsensor).
W=TxR
Example: Using the SR193 probe and a 2% trigger level, the width would be 1000A x 2%
= 20A. Therefore, a deviation of ±20A will cause a transient event to be captured.