A: Models: 8800A, 8800B & 8800P Procedure:
1) Turn off power
2) Hold down the Mode button while powering up. (Alt dSp screen displayed)
3) Use the Mode button to scroll through the menu until you find the 'Set LoC, or Set Un LoC' screen.
(whichever was the last setting will be displayed, LoC or Un LoC.)
4) Use the Up button to change from LoC to Un LoC, Or use the Down button to change from Un LoC to LoC.
(the reverse action will have no effect)
5) Press the Pressure Correct button to return to the normal dew point display.
Model 8800T Procedure:
1) Press the mode switch to get to the Viewing serial number screen mode (####)
2) Hold down both the Up and Down buttons to reboot the unit and restart it in the Set-up mode.
3) Immediately press and hold the Mode button to see Set ALt / dSp
4) Use the Mode button to scroll through the menu until you find the Set LoC, or Set Un LoC' screen.
(whichever was the last setting will be displayed, LoC or Un LoC.)
5) Use the Up button to change from LoC to Un LoC, Or use the Down button to change from Un LoC to LoC.
(the reverse action will have no effect)
7) Either hold down both the UP and Down buttons to reboot the unit or cut the power and restart.