How do I adjust calibration on my PSD111+?

Access the menu on the PSD111+: To do this, move the Temperature switch to the off position and hold the up and down buttons simultaneously for 3 seconds, or until a menu appears.

1. Press and hold the Up and Down button simultaneously at the CALselection.
2. Press Up or Down to select the Calibration amount (-5F to +5Fincrements)
3. Once the desired calibration point is reached, press and hold the up and down buttons simultaneously to confirm.