hipap calibration note if in doubt click the “help” button
TRANSCRIPT
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HiPAP Calibration
Note if in doubt click the “Help” button
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Velocity Cast
• It is important to have the correct Sound Velocity for the correct use of the HiPAP and HPR.
Do a velocity cast, process the cast into a comma separated file, with Depth, and Speed of Sound.
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The APOS Screen
The Sound Velocity Icon
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Click on the Sound Velocity Icon
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Entering the Velocity Profile
• A picture similar to the slide below will appear.
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• Select “File”, and “Open, or click the “Icon” to open a file.
The file open Icon
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• A dialog box similar to this will open. Either steer to the place where your “new” velocity cast is situated, or copy your file into the APOS\Data folder and select it
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• Your velocity cast should open in a text format. You can edit the file like the example, giving a date or location to make the file meaningful.
Added date information
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• Select Convert from the file menu.
Convert
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• You will be asked to convert File to Data
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• You can now give a Heading text to your Profile, and select the fist line to convert. Use the depth neares to just below the transducer. Also make sure you know which is the depth and velocity column in your file.
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Header from previous dialog
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Set the Profile to Active
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Or
This Icon
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And Finally
• Close down all the open boxes.
• Save everything when prompted.
• When finished click the Sound Velocity icon again.
• Make sure you have saved the correct Active Velocity.
• Close the Velocity Profile Window.
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Add the Transponder as usualEnter the Correct serial number
Select MPT
Don’t forget the release box
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Go to Configure Transponder
Either from the menu on the top, Configure Transponder, or right click the icon and select Transponder
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Tab to the second Page
The second page is marked as Transponder Functions
The Release button is down here. You only get asked once if you are sure you want to Release the Transponder
It is quite useful to configure the Green Dot screen as Trend. Then setup the Trend menu to monitor Depth from the Transponder
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• Activate the Calibration transponder, after it has been deployed and is on the bottom
Calibration Transponder
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• Click on Utility, then on Transducer Alignment
Transducer Alignment
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Right click the white section of the box
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Select New Alignment of APOS Transducer
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Select your Transponder
• A dialog ox like this will appear. Select your calibration transponder from the drop down menu.
• Also if you have more than one HiPAP, select the one you are calibrating.
Drop down Menu
The transducer being calibrated
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The Transponder
The Transducer
Note. You must have GPS, preferably DGPS into the system and working.
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Select the transponder, and right click on it
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Right Click on Properties
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• Decide if you want to start and stop the calibration manually or automatically after a chosen number of position pairs .
• Normally I would select “After # position pairs” choose 100
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The Pattern
• It doesn’t matter on the chosen pattern• The preferred method is 4 Cardinal points
and a spin stopping at each quadrant, over the top of the transponder.
• Note Stay in the beam footprint of the transponder
• Ie a 324 transponder, is a 30Khz, 2000 meter depth rated, and a +/- 45 degree beam pattern.
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4 Cardinal Points and a Spin
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• Press the “Calculate” button.
• After a short period of time an answer will appear.
Number of points logged
Ensure this box is ticked
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The Answer
Number of points used in the caculation
The new values for the transducer The update button
must be “Live”
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• If the “Update” button is not active, you will need to close all the dialog boxes and log on as “Service”
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Logging on as Service
Select “User”
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Logon
Select Logon
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From the drop down menu select Service
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The Password
• The Password is ALWAYS 1997
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Select “Show Results”
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Update is now live
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You Will Be Warned
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Almost Done
• Select Yes• The new Pitch Roll
and Gear (Rotation) will be down loaded into the tranceiver
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Save to File, a jpg is saved of the alignment
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• Close down the Dialog Boxes
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When you get to this one
Right click on the transponder.
Select “Save Measurements As”
Save the file, the default is the Transponder channel, ie B42
The transducer being calibrated ie 11,21, 31 etc if you have more than one,
And the time the file was saved.
You can name the file anything you like.
Save Measurements as
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Finished
• The system is ready to go to work.
• Easy