Ryobi RP4011 - Manual (Page 3)

3
OPERATION OPERATION
 Do not attempt to use this product if the battery cover is not securely
closed.
TURNING THE INSTRUMENT AND LASER ON/OFF
See Figure 3, page 13.

Press the ON/DIST key at the center top of the keypad. The instru-
ment and the laser will turn on.
 The laser will turn itself off after 1 minute of inactivity.
 The instrument will switch off automatically after three minutes of
inactivity.
 To turn the laser off, press the CLR/OFF key at the bottom center
of the keypad. To turn the instrument off, press and hold the CLR/
OFF key.
MAKING ACCURATE MEASUREMENTS
To increase the accuracy of measurements, follow these helpful tips.

Limit the range of measurement to 98.43 ft.
 Aiming at glossy surfaces may deflect the laser beam, and affect
accuracy.
 Colorless liquids, dust-free glass, Styrofoam, or other semi-
permeable surfaces may cause measurement errors.
 Periodically perform test measurements, especially after extended
use and before, during, and after critical measurements.
LCD DISPLAY
See Figure 4, page 13.

Laser is ON
 Reference Point Measuring (front and rear)
 Pythagoras Indicator
 Area/Volume
 Battery Status
 Units with Exponents (2/3)
 Intermediate Line
 Current Measurement/Summary Line
 Info
REFERENCE SETTING
See Figure 5, page 13.
The default reference setting is from the rear of the instrument. To change
the setting to the front, press and release the REFERENCE/UNITS key
on the upper left of the keypad until it shows the desired reference point.
TAKING MEASUREMENTS
See Figure 6, page 14.
Single Distance Measurement
 Press the ON/DIST key once to turn the laser on.
 Press again to measure and display the distance.
Units of Measure
 Press and hold the REFERENCE/UNITS key for 3 seconds. Continu-
ously pressing and holding the key will display the same measure-
ment in meters, feet/inches, and inches only.
TRACKING
See Figure 7, page 14.
The tracking message appears as lowercase “
trc” in the LCD display.
This indicates that the laser is beamed at a surface or object that re-
quires a longer time frame to read accurately. If you continue to receive
this message, try to get a reading from a more direct angle or a more
solid surface.
FUNCTIONS
Distance Addition/Subtraction
See Figures 8 - 10, page 14.

Take a distance measurement.
 Press the [ + ] key. The next measurement you take will be added to
the previous one.
 Press the [ - ] key. The next measurement you take will be subtracted
from the previous one.
Repeat these steps as many times as desired. The result will be displayed
in the summary line. The value to be added or subtracted is displayed
in the intermediate line.

Press the CLR/OFF key to cancel the last step.
Area
 Press the MODE key. The [ ] symbol is displayed.
 Press the ON/DIST key to take the first distance measurement (for
example, length).
 Press the ON/DIST key to take a second measurement (for example,
width).
The area measurement will be displayed in the summary line. The second
measurement is displayed in the intermediate line.
Volume of a Space
 Press the MODE key twice. The [ ] symbol is displayed.
 Press the ON/DIST key to take the first distance measurement (for
example, length).
 Press the ON/DIST key to take a second measurement (for example,
width).
The result of the area measurement from the values already measured
is displayed in the summary line.

Press the ON/DIST key to take a third distance measurement (for
example, height). The value is displayed in the intermediate line.
The result of the area measurement is displayed in the summary line;
the previously measured value is displayed in the intermediate line.
Indirect Measurement
See Figure 11, page 14.
The laser distance measure uses the Pythagorean method (a
2 + b 2 = c 2 )
to calculate distances that are otherwise difficult to access.
These instructions must be followed exactly for best results.

All target points must be vertical or horizontal surfaces.
 The instrument should be rotated around a fixed point.
Indirect measurement using 2 auxiliary measurements:

Press the MODE key three (3) times. The [ ] symbol is displayed.
The horizontal distance to be measured flashes in the symbol.
 Press the ON/DIST key to measure the horizontal distance.
 The hypotenuse distance to be measured flashes in the symbol.
 Press the ON/DIST key to measure the hypotenuse distance.
 The result will be displayed in the summary line.