XT2640 Operating Manual
13 July 2016
Page 56 of 187
Briefly, this is performed by –
1.
Insert the drive into the front panel USB port and wait for it to be READY.
2.
Display the screen to be recorded.
3.
Press the DRIVE INFO area of the screen, the screen shows the file export/import screen.
4.
Press the SCREEN IMAGE button. The screen changes to allowing you to enter a file name.
5.
Enter the desired file name (the extension is automatically provided).
6.
If the file already exists then you are prompted to respond if you wish to overwrite it or not.
7.
The file is then written.
12.8
VIEWING
FUNDAMENTAL
SIGNAL
VECTORS
‐
THE
VECTORS
SCREEN
The VECTORS Screen gives you access to polar charts of voltage and current fundamental vectors and a numerical listing of that data
(which includes sequence data if showing a VPA which is configured for 3ø4w WIRING).
The VECTORS Screen can be selected for view from any of the Main Data Screens by pressing the VECTORS button.
The displayed vectors and the corresponding numerical data are controlled by the 2 buttons across the top of the screen (in order
from left to right) –
1.
Selection of the channel or VPA for which to display the vectors.
2.
Selection of the vector traces to show. The available selections are dependent on whether a channel or a VPA is selected and if a
VPA is selected then also the WIRING configuration of that VPA. For each available trace‐
A trace is enabled if the SHOW button is highlighted colored green. Pressing the SHOW button toggles whether the trace is
selected or not.
Pressing the COLOR button changes the color of that trace to the next available color, the name of the trace being changed
shows which color will be used for that trace and the numerical data for it.
Note:
If no fundamental harmonic data is available for the selected channel or VPA then the vector chart is blank, there are no
numerical results on the left side, and NO FUNDAMENTAL is displayed centered in the chart.
If no traces have been enabled to be shown then the vector chart is blank, there are no numerical results on the left side,
and NO TRACES SELECTED is displayed centered in the chart.
If the frequency is shown colored orange then the harmonics are not locked closely enough to allow accurate phase
measurements.
The length of all voltage vectors are scaled such the longest vector just touches the outer boundary of the chart and the
other voltage vectors are scaled relative to this.
The length of all current vectors are scaled such the longest vector just touches the outer boundary of the chart and the
other current vectors are scaled relative to this.
For other than 3ø3w(2ch) WIRING, 0° is the phase of the voltage in the lowest numbered channel in the VPA (if a VPA is
selected) or the voltage signal of the selected channel (if a channel is selected).
In the numerical listing on the left side, the angles shown are the angles of each corresponding vector as shown on the
chart.
For the sequence data (if any) to have the normal significance, the wiring phasing must be phase A to the lowest numbered
channel in the VPA, phase B to the middle, and phase C to the highest. If the wiring is not as described then the three
sequence data will have different meanings to those shown.
12.8.1
RECORDING
VECTORS
The method for performing this is fully described in section 23.
You can make a record of the VECTORS screen by saving an image of it to a graphic file on an external USB drive attached to the front
panel USB port.
