Using the Triple Beam Balance

Triple Beam Balance:  Units: g (metric)  Place in center of lab table.  Before zeroing:  Clean the pan  Put the sliding masses at zero on each beam  Check if zeroed: white line of pointer lines up with zero line.  If not Zeroed:  Pointer below zero line, turn the zero adjust knob away from you. Adds mass to the pan.  Pointer above zero line, turn the zero adjust knob towards yourself. Adds mass to pointer.

Measure objects: Place on pan, adjust the sliding mass until pointer is zeroed. Make sure masses are in notch. NO partials numbers. No fractions. Add the readings on the three beams to get the mass.readings

What would be the mass of the object measured in the picture? _______ + ______ + _______ = ________ g Rear beam Middlebeam Front beam 10’s 100’s 1’s

Exact Measuring:  Adjusting Mass for container:  If substance to be measured is a solid  ¼ sheet paper or container on pan. Measure the mass  Pour substance onto paper/container. Measure the mass.  Subtract measurements of two masses. This gives you the mass of the substance only.  If substance to be measured is a liquid;  Beaker or other container on pan. Measure mass of beaker/container.  Pour substance onto beaker/container. Measure the mass.  Subtract measurements of two masses. This gives you the mass of the substance only.