User manual BOSCH PLR 50 REV 6-2009

[. . . ] Working safely with the measuring tool is possible only when the operating and safety information are read completely and the instructions contained therein are strictly followed. Never make warning labels on the measuring tool unrecognisable. Caution ­ The use of other operating or adjusting equipment or the application of other processing methods than those mentioned here, can lead to dangerous radiation exposure. The measuring tool is delivered with a warning label in German language (marked with the number 13 in the representation of the measuring tool on the graphic page). [. . . ] When no measurement has taken place approx. 20 seconds after sighting, the laser beam is switched off automatically to save the batteries. 28 | English Selecting the Reference Level (see figures A­C) For measuring, you can select between three different reference levels: ­ The rear measuring-tool edge (e. When measuring onward from a wall), ­ The rear positioning-pin edge 14 (e. When measuring from a corner), ­ The front measuring-tool edge (e. When measuring onward from a table edge). To change the reference level, press button 9 until the requested reference level is indicated on the display. Each time after switching on the measuring tool, the rear end of the measuring tool is preset as the reference level. Push the measuring button 12 once for sighting and once more to take the measurement. the measured value is indicated at the bottom in the display. Area Measurement For area/surface measurements, press button 3 until the indicator for area measurement appears on the display. After taking the second measurement, the area/surface is automatically calculated and displayed. The last individual measured value is indicated at the bottom in the display, while the final result is shown at the top. The laser beam remains switched on between all three measurements. After taking the third measurement, the volume is automatically calculated and displayed. The last individual measured value is indicated at the bottom in the display, while the final result is shown at the top. English | 29 Indirect Length Measurement (see figure D) The indirect length measurement is used to measure distances that cannot be measured directly because an obstacle would obstruct the laser beam or no target surface is available as a reflector. Correct results are achieved only when the laser beam and the sought distance form an exact right angle (Pythagorean Theorem). in the illustrated example , the length B is to be determined. For this purpose, A and C must be measured. Pay attention that the line segement A and the sought distance B form a right angle. After completing the second measurement, the distance B is calculated automatically. [. . . ] The measuring distance must be indoors; the target surface for the measurement must be smooth and reflect well. ­ Measure the distance 10 times after another. The deviation of the individual measurements from the mean value must not exceed ±3 mm (max. Log the measurements, so that you can compare their accuracy at a later point of time. [. . . ]