American Weigh Scales (AWS) TB-2610 - Manual (Page 4)

Troubleshooting:
Before troubleshooting please take these words of
“Balance Beam Wisdom”. Balance Beams are a very old and
basic design of scale. They date back to the ancient Egyptian
Empire and Balance Beam scales were used to build the
pyramids. Thus, the design is quite simple - a cup (hidden
on modern beam scales) filled with metal loose weights
and some metal sliding weights. Therefore fixing a Balance
Beam scale requires very basic steps, such as adding or
removing weight from the cup or using a wrench to make
the beam swing smoothly (if it is touching or rubbing as it
operates). First, before troubleshooting, be certain that you
have correctly unpacked the scale and removed all rubber
stoppers. Also be sure that the sliding weights are all at their
proper ZERO position.
“The Scale Won’t Zero”: 1. Sometimes in transport, the
beam will some how become unbalanced. This means
adjusting the zero knob doesn’t make the scale zero
properly. If this happens to your scale, please know that
you can manually add or remove weight to the “Balance
Cup”. The Balance Cup is located underneath the round
metal tray. Simply spin the tray off (counterclockwise) to
access the Balance Cup and add or remove weight as
follows:
If your scale would not zero because it was reading too •
light (meaning you would have to press down on the tray
to make it zero), then add a small amount of weight to
the cup (just a coin or paperclip - you can add or remove
weight as you require)
If your scale would not zero because it was reading too •
heavy (meaning you would have to pull up on the tray to
make it zero), then remove a small amount of weight from
the cup (just remove a tiny amount, you can remove or
add weight as you require).