Makita SK106GDZ SK106 Instruction Manual - Page 14

Accuracy Check Ac c u ra c y Ch e c k Check the accuracy of your instrument regularly and particularly before important measuring tasks. Check Levelling lock before checking the accuracy. Levelling Checking the accuracy of the levelling Makita SK106D/SK106GD Set the instrument on a tripod half-way between two walls (A+B) that are approx. 5 m apart. Place the lock switch in the "Unlocked" position (see Levelling lock). Direct the instrument at wall A and switch on the instrument. Activate the horizontal laser line or laser point and mark the position of the line or the point on wall (A1). Rotate the instrument by 180° and mark the horizontal laser line or the laser point in exactly the same way on wall (B1). Then place the instrument at the same elevation as close as possible to wall A and again mark the horizontal laser line or the laser point on wall A (A2). Rotate the instrument by 180° again and mark the laser on wall B (B2). Measure the distances of the marked points A1-A2 and B1-B2. Calculate the difference of the two measurements. |(A1 - A2) - (B1 - B2)|