Performing a device calibration (HPS2 handle and SiteVision Integrated Positioning System only)

If you are using the HPS2 Handle or legacy SiteVision Integrated Positioning System, a device calibration is required to calibrate your device camera to work with the SiteVision hardware, for precise AR visualization and accurate EDM measurements.

The process requires aligning the cross-hairs on the screen with EDM measurements. These measurements must be performed at two different distances—the first point is at close range, and the second further away.

During the calibration process a recommended distance is displayed for each point, and the current EDM measured distance is displayed. This guides you to move the SiteVision system closer to or further away from your target until you are at the recommended distance.

If you have not undertaken a calibration prior to using the SiteVision measurement apps, then you will be prompted to run the device calibration procedure the first time you use the EDM measurement function.

The EDM uses a laser pointer that creates a red dot on the point to which it is measuring. This red dot is typically easy to see when inside, and difficult to see outside, particularly on a bright day. Alignment of the crosshairs with the red dot is automated, but relies on the camera being able to see the red dot. For this reason Trimble recommends that you complete the calibration inside where it is easier to see the laser pointer. Ideally, set the unit on a stable platform such as a table or range pole with a clear target such as a wall at a distance of 45 to 60 cm (1.5 to 2 feet), and another target such as a wall more than 3 m (9 feet) away.

  1. Mount your device on the unit, connect to the GNSS receiver, and switch the unit on.

  2. Tap / Tools/ Configuration, then next to Device Calibration tap Calibrate.

  3. You may get a request to confirm that you allow the SiteVision system to connect to the EDM via Bluetooth. If this message appears, confirm that you allow the connection.

  4. Read the instructions for Device Calibration, then tap Start.

  5. Select Point 1 at close range (approximately 45 to 60 cm / 1.5 to 2 feet).

    1. Follow the instructions and move to the correct range band. Once within the correct range band the automatic detection will search for the red dot and align the crosshairs. They will turn white when you are within the permissible tolerance of the recommended distance for the calibration measurement.

    2. Tap Select Pt 1 to confirm the measurement.

  6. Select Point 2 (> 3 m / 9 feet).

    1. Repeat the process at the longer distance. The cross-hairs will turn white when the distance is > 3 m / 9 feet.

    2. Tap Select Pt 2 to confirm the measurement.

Automatic alignment of the crosshairs can have difficulty in very cluttered environments or environments with red coloured objects. If the automatic alignment is not performing well, you can switch to manual alignment by tapping (bottom right of the screen).

When using manual alignment the process is the same except you can use the joystick bubble to align the cross-hairs to the EDM laser (the red dot). Tapping the arrows on either side of the joystick provides fine tune adjustments.

 

 top