User’s Manual
30
The time scale can be displayed in absolute (date/time) or relative (fractional seconds) format. The
absolute format exposes the time-stamp that was written in memory with the record. Relative time is
more useful when examining raw signals.
When viewing acceleration data, the scale can be chosen as
𝑔
or
𝑚
/
𝑠
2
, in linear or dB scale for RMS
values.
When viewing velocity data the scale is
𝑚
/
𝑠
, in linear or dB scale for RMS values.
By default the graphs display signals or RMS levels on a per-axis basis. But when the
Acceleration/Inclination
button is set to
Inclination
, and if the recording includes the average
acceleration along the three axes, the graphs combine the acceleration components and show:
•
The norm of the acceleration on the top-most graph. This is normally 1g if the instrument is
stationary and only subjected to changes in inclination.
•
The
Theta
tilt around the X-axis on the middle graph. The inclination is presented in degrees.
•
The
Phi
tilt around the Y-axis on the bottom-most graph. The inclination is presented in
degrees.
8.4.2
File Save
Pressing the
Save File
button saves all the records downloaded from the instrument to a file on the PC.
In addition to the whole contents of the recording memory the file also contains ancillary information,
such as calibration, instrument information…etc.
The file is saved in a proprietary format with the extension
.cil
.
By default the file is saved with a name that contains the
User-ID
of the instrument, as well as the
present date and time.
8.4.3
File Open
Pressing the
Open File
button recalls all the records previously saved to a
.cil
or
.wlg
file. The function
works very much like the
Instrument Download
function, except that the data comes from a previously
saved file.
Two types of files can be opened and displayed:
•
.cil
This type of file is created by the
Instrument_Manager
application. It contains all the
data that has been downloaded from the instrument.
•
.wlg
This type of file is created by the
Instrument_Listener
application. It contains data that
is sent by an instrument over the network.
The
Source
field shows the
User-ID
of the instrument the data comes from.
That function works even when no instrument is connected to the PC, so it can be used to examine
data that was recorded elsewhere and sent to the user as a file.