Johnson Level & Tool Mfg. 40-6004 - Manual (Page 10)

10 ©2013 Johnson Level & Tool - Rev. 1
Adding or Subtracting
Press and release the button to activate laser.
Press and release the button to record first measurement.
Press and release (first measurement moves to sub value position
on screen and a “+” sign temporarily appears).
Press and release the button to activate laser. (If inactive.)
Press and release the button to record second measurement.
Press and release to add measurement 1 (stored in sub value
position) and measurement 2 together.
To add another measurement to sum (repeat same measurement
sequence) to tally.
To subtract a value in the tally sequence press button.
+
+
-
This laser distance measure has the capability to add or subtract area,
volume or indirect measurement calculations. For example, if you need
the square footage of four rooms this instrument will allow you to add
each area calculation together to sum the dimensions of the four
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