RFL 9300 RFL Electronics Inc.
January 30, 2002 6-55 (973) 334-3100
6.5.10 VIEWING OSCILLOGRAPHY DATA
In addition to storing alarm and trip events, the RFL 9300 also stores oscillography data for the trip events,
which can be viewed by the user. The stored oscillography data contains twelve cycles of all four measured
trip currents which consist of six cycles of pre-trip data and six cycles of post trip data.
To view the raw oscillography data the user must first enter the sequence of events menu as shown in Figure
6-22. When the “O” command is entered, you will be prompted to enter the number of the trip event that you
want to view (1-5). When the desired trip event number is entered, a table will be displayed which contains the
raw oscillography data. A typical oscillography data table can be seen in Figure 6-26, which consists of five
columns. From left to right, the columns contain Phase A data, Phase B data, Phase C data, 3I0 data, and the
algorithm code.
To view the oscillograms, the raw oscillography data must be downloaded using a terminal emulation program
and then plotted using a graphics program. The following example uses Microsoft Windows Terminal to down-
load the oscillography data, and uses Microsoft Excel to plot the oscillography data. These instructions must
be modified if other software packages are used.
6.5.11 DOWNLOADING AND GRAPHING AN OSCILLOGRAPHY RECORD
To download and graph an oscillography record, do the following:
1. Establish communication between the RFL 9300 and your PC or laptop using Microsoft Windows Ter-
minal. When communication has been established the RFL 9300 will send the following prompt to
your PC:
9300>
2. Type “S” [Enter] to enter the sequence of events menu as shown in Figure 6-22.
3. Type “O” [Enter] to download the oscillography record from the RFL 9300 oscillography board to the
PC or laptop.
4. Click on “TRANSFERS”.
5. Click on “RECEIVE TEXT FILE”.
6. Enter a new filename using the following format: XXXX.TXT. For example you can name the file
OSC1.TXT. Then press the [ENTER] key.
7. Enter the # of the desired record and then press the [ENTER] key. The oscillography data table will be
displayed as shown in Figure 6-26.
8. Click on “STOP” after the record is complete.
The oscillography record is graphed using Microsoft Excel. A diskette containing a Microsoft Excel macro is
provided by RFL to perform this task. The diskette also contains a file with instructions on how to use the Mi-
crosoft Excel macro under the filename README.TXT. A typical oscillography data plot is shown in Figure 6-
27.
To Next Page
Loading...