2nd Sight's InstaCaliper comes with caliper heads in three sizes: 50mm (2"), 100mm (4"), and 150mm (6"). To measure tree diameters or circumferences accurately with the 50mm (2") caliper head, you need configure your InstaCaliper app for that size caliper head.

To configure:

  1. Launch the InstaCaliper app on your handheld device (Ruggedized Handheld Computer or RHC).
  2. Once the InstaCaliper app is open, press and hold the "Config" button.
  3. Press the "Gear" icon on the top right of the screen.
  4. Enter the last four digits of the RHC Unit ID (located on the Config screen) to unlock the Admin screen.
  5. Press "50MM DEFAULTS."
  6. Press "Done."

NOTE: The default offsets were determined by 2nd Sight engineers. We recommend testing the 50mm caliper head for accuracy using calibrated dowels after configuring the 50mm head with these default settings. If the 150mm head does not appear to be measuring the calibrated dowels accurately, please contact 2nd Sight at 509-381-2112.