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Installation of the MT-Dive demo Download =
MT-Dive
demo from www.jensen-software.com (at page “Downloads”=
). Start the
Windows Explorer and execute the downloaded file “mtSetup.exe”=
;.
You will =
bet
he asked fort he location where to unpack and install MultiTrace. Select =
for
instance e:\program\mt (if this folder yet does not exist then the unpacker will create it)
When the
installation is complete you can launch MultiTrace from the Windows Explo=
rer. (To unins=
tall
MultiTrace simply delete the folder “e:\programs\mt”)
The first steps in MultiTrace and how to analyze
dive events When you
start MT there is firstly a message about the demo state of MT.
Then MT
enters its Main Dialog. The “General”-page is for the beginni=
ng
not important, ignore this page and select the “Depth
Channel”-page.
Press the=
FileName-button and select your data file. Fill in =
also
the other fields: sampling rate, start time, Header, Column, Separator. If necessary open your data file (e.g.by ‘WordPad’) In this
example the data file is of kind “text file”. The sampling
interval is 1 min that is 60 000 msec.
Here all =
the
settings for the depth channel are correctly filled in. Now press all the
‘Copy’-buttons. In this way all the settings are copied to the
pages of the other channels. Then select the ‘Temp. channel’-page.
All the parameters are identic to the depth
channel, except of the column. Change the entry of this field from
“3” to “4”,since the c=
olumn
of the temperature data is 4.
A last=
go to the Aux. channel-page.
Delete the filename. Thereby MT will not load a third channel.
After this press the Start-button. MT will now import the data channels from the data file. When the graph are visible you may - bust must not – inv= ert the data, so that dives points downward. Choose the menu ‘View/Style’ and select ‘Inverted’ (then OK). By = this operation the data will be not changed, only represented in another way.<= o:p>
After this
choose View/Refresh. This command rebuilds the total window (the uppermos=
t)
so that it shown in the same way as the depth channel window.
Now it is
time to become a bit familiar with the usage of Alternati=
vely
you can use the mouse. Click into the time axis, click at the left or rig=
ht
channel border or draw the left or right channel border inside the channel
window. Complete =
info
about moving the borders and cursors are in the menu ‘Help’. =
Note
the important key Ctrl-F6. This key lets jump the working cursors into the
current window irrespective of their current location. Vertical zooming Press Ctr=
l-PgUp or Ctrl-PgDn: The =
graph
will be zoomed in and out. Press arrow-up and arrow-down. The graph will =
move
up- and downwards. Or use the mouse. Click at the upper and lower channel
edge or draw the upper/lower edge into the channel window. Or click into =
the
y-scale.
Introduction into the dive analysis Baseline correction Ina first
step adjust the baseline. It is recommended to enable a help line at y=3D=
0.
Choose menu “View/Subsidiary line” and enable “Line 1 at
y=3D0”. Thereby MT draws the baseline.
Now searc=
h a
section of the data (by F3 and left arrow or by mouse clicks in the
time-scale) which surely represents the water surface. Then set the worki=
ng
cursors F4 and F5 at this section: Let them jump into the current window by
Ctrl-F6 and move them by the mouse or by F4-right/left and F5-right/left.=
And
be aware that PgUp, PgDn=
changes the ‘speed’ of the cursors. If the
working cursors are located properly then choose the menu
‘Baseline/Mean F4..F5’ (and watch =
what
happens with the y-scale).
Setting the dive parameters In the ne=
xt
step adjust the parameters in order to find the dive events. Choose the m=
enu
“Analysis/Parameters” and set - for this example data - the t=
hreshold
=3D 2 since MT has to find all dive events that exceeds 2 meters. For the
beginning ignore the other settings, these are fine tunings, except
“Window size”: This is the size of the window which will later
display the found dive events. Maybe you wish to change it later to anoth=
er
magnitude. Now press=
the
OK-button.
Before
starting the dive analysis set the F4 and the F5 cursor at the
begin of the data channel (since it is assumed that the search for=
the
dive events should start at the begin of the channel). The fas Now press=
the
key Q. Q sets in motion the=
dive
finder. MT searches the next dive event (starting at the F5 cursor) and
displays it at the screen. The distance from the left to right edge is the
“Window size” (of the “Analysis/Parameters menu). If de=
sired
you may alter them anytime as well as any other parameter. Repeat Q: Mt
searches the next dive event. Note that you can correct the cursors i.e. =
move
them a bit to left or right, if you wish. The working cursors F4 and F5
indicate the onset and the end of the dive event, the smaller cursors (F8=
and
F9) indicates the diving bottom phase. The key W
does the same as the key Q. Additionally it calculates and exports the di=
ve
characteristics (dive duration, max depth,…).
He key W is disabled at the demo version of MT.
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