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BDSM400 QUICK START GUIDE
HOW TO:

Measure Room Dimensions:

1.) Use the “SET” key to set the datum to measure 
from the “bottom” of the instrument.
2.) Tip the sonic transmitter to the forward (bent) 
position.
3.) Move slide switch to distance measurement 
position (far right).
4.) Turn the instrument on using the switch on the 
rear.
5.) Place the unit against a wall - point at a clear 
unobstructed opposite wall.
6.) Press either “read” button on the sides of the unit.
7.) The dimension will be displayed.
8.) Repeat for the opposite wall.
9.) To calculate area, press “X” after the first 
measurement and “=” after the second.

Selecting the datum or measuring point.

“SET” Key

“SET” Key

Part No. 624046-01

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