HiPAP Calibration

Note if in doubt click the “Help” button

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.

The APOS Screen

The Sound Velocity Icon

Click on the Sound Velocity Icon

Entering the Velocity Profile

• A picture similar to the slide below will appear.

• Select “File”, and “Open, or click the “Icon” to open a file.

The file open Icon

• 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

• 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

• Select Convert from the file menu.

Convert

• You will be asked to convert File to Data

• 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.

Header from previous dialog

Set the Profile to Active

Or

This Icon

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.

Add the Transponder as usualEnter the Correct serial number

Select MPT

Don’t forget the release box

Go to Configure Transponder

Either from the menu on the top, Configure Transponder, or right click the icon and select Transponder

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

• Activate the Calibration transponder, after it has been deployed and is on the bottom

Calibration Transponder

• Click on Utility, then on Transducer Alignment

Transducer Alignment

Right click the white section of the box

Select New Alignment of APOS Transducer

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

The Transponder

The Transducer

Note. You must have GPS, preferably DGPS into the system and working.

Select the transponder, and right click on it

Right Click on Properties

• 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

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.

4 Cardinal Points and a Spin

• Press the “Calculate” button.

• After a short period of time an answer will appear.

Number of points logged

Ensure this box is ticked

The Answer

Number of points used in the caculation

The new values for the transducer The update button

must be “Live”

• If the “Update” button is not active, you will need to close all the dialog boxes and log on as “Service”

Logging on as Service

Select “User”

Logon

Select Logon

From the drop down menu select Service

The Password

• The Password is ALWAYS 1997

Select “Show Results”

Update is now live

You Will Be Warned

Almost Done

• Select Yes• The new Pitch Roll

and Gear (Rotation) will be down loaded into the tranceiver

Save to File, a jpg is saved of the alignment

• Close down the Dialog Boxes

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

Finished

• The system is ready to go to work.

• Easy