XT2640 Operating Manual
13 July 2016
Page 125 of 187
8.
A numeric character which defines if the measurement result is to be followed by the applicable units character(s) as follows –
0: No units character(s) will be included.
1: Units character(s) will be included.
9.
Up to 5 characters which define the text to be shown before the measurement result in this cell (this may be blank which has the
same resultant cell as if the previous format was used).
23.6.3.5
EXAMPLE
CUSTOM
SCREEN
ASCII
FILE
A simple example of the contents of such a file is‐
C,0,0,3,1,255:255:255,,,MEASUREMENTS
C,2,0,1,1,255:255:255,,,Ch2
C,3,0,1,1,255:255:255,V:CH2,1
C,4,0,1,1,255:255:255,A:CH2,1
C,5,0,1,1,255:255:255,W:CH2,1
C,6,0,1,1,255:255:255,VA:CH2,1
C,7,0,1,1,255:255:255,PF:CH2,1
C,8,0,1,1,255:255:255,FREQ:CH2,1
This sets the screen to be similar to that shown below.
23.6.4
UPDATING
THE
FIRMWARE
OR
THE
FPGA
These files must have a specific filename.
There are several types of update files; most of these are associated with updating the firmware or the FPGA to a newly released
update from XiTRON. Follow the instructions provided with the firmware or FPGA release to import and use these files.
23.6.5
CHANGING
THE
WELCOMING
SCREEN
This file must have a specific filename of WELCOME.IMG and is in a proprietary binary format.
One of the file selection possibilities in the UPDATE type of file import is to change the welcoming screen shown on the XT2640 when
it is turned on. An application is provided with the XT2640 allowing you to convert a standard image file into the format needed for
this file. The image must be exactly 800 pixels wide by 480 pixels high to be used by this utility.
23.7
DATA
LOGGING
The XT2640 has the capability of data logging up to 16 user defined measurements (or sets of harmonics measurements) at a user
defined interval. This can be performed to one of the following –
1.
To an external USB Drive, using an internal 32Mbyte buffer to reduce the impact that drive speed has on the achievable data
logging rate. The maximum rate of data logging will be limited by the drive speed (see section 23.7.8).
2.
To the internal 32Mbyte buffer. This will be automatically transferred to the configured file on an external USB drive when one
is subsequently connected. This internal buffer is volatile, the contents will be lost if power is removed from the XT2640 or the
XT2640 is turned off. There is no restriction on the maximum data logging rate (other than the length of the buffer).
3.
To an internal memory in the XT2640. This memory varies in size between individual XT2640 instruments, but is at least
2GBytes and may be up to 4GBytes in length. This is non‐volatile, that is the contents will not be lost if power is removed from
the XT2640 or the XT2640 is turned off. The maximum rate of data logging will be slightly limited by the memory speed (see
section 23.7.8).
Note:
Older XT2640 instruments which are upgraded to firmware which has this capability might not have the capability of data
logging to internal memory. Contact XiTRON for details regarding an upgrade if this is not available and it is desired.
