POSM Latras Usage

Latras allows POSM to capture X, Y, and Z data from the camera head without the use of a locator and GPS; however, the user will still need to enter the GPS coordinates of the manholes where the inspection will start and end.
To enable Latras, go to the Edit Preferences menu, then click on Setup RS232 and External Devices.

Click the Enable Latras checkbox. Make sure that POSM technical support has installed the correct Latras
DLLs into the WInKanal32 folder in order for the system to run.
The most effective way to use Latras is through the NASSCO PACP and LACP templates. This ensures that each tap is marked and allows the use of the POSM Lateral Launcher to start each Lateral inspection.
To ensure that the user is at the correct manhole, we strongly recommend that you use POSM Map Reader. This not only fills out the header information for the PACP inspection, but also enters the coordinates and (if known) the height of the manhole.

In this example, the user has selected TC4-M9-1 to TC4-M9-2 as the pipe to inspect. Once the user clicks on the pipe, POSM will be launched and all information known in GIS will be loaded into the header.
For an even faster header entry, the user may choose to start a new session first, then quick-fill the previous session. The user can then click the pipe on the map while “POSM Start New Session” is open to have the GIS data populated into the quick-filled header.

Clicking on the Coordinates tab will show the coordinates that POSM Map Reader populated. If the manhole heights were known, they will also fill in. If heights are filled in, the Z coordinates will be calculated from the start height; otherwise, they are calculated from 0 feet.
To begin the inspection, click the green Save Information and Start Inspection button.

When the user clicks the green “Start Session” button, the Latras window will pop up and connect to the Latras head. The user does not need to interact with this window and it can stay minimized. The window is shown for training purposes only to let the user know what the system is doing.
As the camera moves down the main, it will capture the coordinates for each distance update, along with the inclination data. This will be stored in the Inclination table of POSM’s database.
At each observation, POSM will replace the calculated value from POSM with the X, Y, and Z data captured from the Latras head.

In this example of a very steep pipe, the crawler has traveled 110.5 feet down the line and traveled 36 feet down into the earth.
When the mainline inspection is completed, click the “End Measure” button. Close POSM, but leave
POSM Latras open.
Using the POSM Lateral Launcher, start a LACP inspection for each Lateral on the Main. Pull back to the last lateral found, moving backwards until you reach the first manhole.

Using the Lateral Launcher will link the mainline inspection to the lateral inspection and the lateral inspection to the mainline tap observation. This double link via unique IDs ensures that each lateral inspection will always be joined to the mainline, even if they become separated in the database exports.
Move to the next lateral and repeat the process until you have inspected all laterals.

As the user moves down the pipe and inspects mainlines and laterals, each XYZ point collected is displayed in the POSM Map Reader. The user may print this map at any time by clicking the Print Map View.
Using POSM Server, the XYZ points and observations may be displayed, and their reports linked back to each observation and line inspection.