OHAUS DISCOVERY BALANCE, Руководство по обслуживанию

Страница: 51 / 99

CHAPTER 3 REPAIR PROCEDURES
3.2.4. Load Cell Assembly
The first several steps of Load Cell assembly are critical. Check at each step that parts are
correctly aligned in order to ensure the balance will function properly.
1. Set the Ratio Beam assembly in place and loosely install the 2 screws on left and
right sides of the yoke. Check that both front sides of the yoke align with the frame
of the Load Cell. If they do not,
Ratio Beam Flexures may need to be replaced , as
explained next page in Section 3.2.5.1: Ratio Beam Flexure Replacement.
Align each front side
of Ratio Beam yoke
with Load Cell frame.
Screw on side
of yoke
Screw on side
of yoke
Ratio Beam
Flexure
Ratio Beam
Flexure
Figure 3-63. Yoke of Ratio Beam must
align with frame of Load Cell.
2. Insert Brass Rod on back side under the Ratio Beam. Be sure Threaded Rod is on
front. See Figures 3-45, 3-46, and 3-47, page 3-26.
Magnet
Temperature
Sensor Tube
Brass Rod
Gap between Coil
and Magnet
Coil inside
Magnet
Figure 3-64. Installing Ratio Beam with hole
centered over the Temperature Sensor Tube.
3. Ensure that the hole in the Ratio Beam is centered over the Temperature Sensor
Tube, and that the gap between the Coil and the Magnet is even. Move the Ratio
Beam assembly
only by the yoke, until it is perfectly centered.
Discovery Balance Service Manual 3-31 Ohaus Corporation www.ohaus.com