Johnson Level & Tool Mfg. 40-6005 - Manual (Page 14)

14 ©2013 Johnson Level & Tool - Rev. 1
It is recommended that you test this function prior to taking important
measurements. Simply write down each Area calculation on a piece of
paper and add (or subtract) the Area calculations along with the Laser
Distance Measure. This will familiarize you with the process of how the
calculations are determined.
Follow the Area measurement instructions above to enter Area mode.
Once the first Area calculation is taken it will be displayed in the bottom
row on the LCD screen.
Press and release the button.
Upon pressing the button the LCD screen will be cleared however the
Area calculation is stored.
The Area mode will remain active on the LCD screen.
Take the second room Area dimensions.
When the Area calculation appears in the bottom row press and release
the button again.
You will now see the previous Area calculation at the top row being added
to the most recent Area calculation in the middle row.
The sum of both Area calculations will be displayed in the bottom row.
Follow this sequence to continue tallying additional room dimensions.
To subtract an Area measurement simply press and release the
button during the sequence and that value will be deducted from the total.
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