Using the DeWalt DW090PK is straightforward. First, set up the heavy - duty aluminum tripod by extending the quick - adjust legs and making sure it's stable on the ground. Then, attach the level to the tripod. Next, use the grade rod to take measurements. Make sure to keep the rod vertical for accurate readings. When measuring horizontal angles, use the 360° horizontal circle with the vernier scale. As for the leveling base, it's easy to adjust to get a level reading. Just turn the adjustment knobs until the leveling vial shows the level position. When it comes to maintenance, keep the level and the tripod clean after each use. Wipe off any dirt or debris. Store the equipment in a dry place to prevent rusting. Avoid dropping or hitting the level, as it can affect its accuracy. And if you notice any issues with the leveling vial or the measurement accuracy, it's a good idea to have it checked by a professional.