Eagle Microsystems LP4300 - Manual (Page 7)

LOAD CELL VOLTAGE CHECK (WITH 15V EXCITATION)
BLACK TO WHITE: +7.5V (EXCITATION / 2)
BLACK TO GREEN: +7.5V (EXCITATION / 2)
BLACK TO RED: +15V
LOAD CELL OUTPUT
GREEN TO WHITE: LESS THEN +/- 5 MILLIVOLTS (NO DEAD LOAD)
LESS THEN 25 MILLIVOLTS (EXACT OUTPUT
VOLTAGE DEPENDS ON DEAD LOAD WEIGHT)
BLK -EXT
GRN +SIG
RED +EXT
YEL SHLD
WHT -SIG
LOAD
CELL
LOAD CELL WIRING
FIGURE 4
N O T E : If the load cell's zero has shifted due to a mechanical overload, the reason for the
overload should be determined before a new load cell is installed.
4.3 REPLACING THE LOAD CELL
Call the factory to advise that the load cell is defective. Report model and serial numbers for both load cell
and scale.
1. Remove all weight from scale.
2. Stand the scale on its side. Use caution; make sure that the hook-up cable is not being damaged.
3. Remove the screws from Summing Box lid. Disconnect the wires of defective load cell
being replaced. Gently pull cable out of the frame.
4. Use 3/4 wrench to remove 2 hext head cap screws which secure load cell to frame.
5. Install new load cell using 35 ft. lbs. torque to screws and fish wires back to the Summing Box.
6. Insert leads into terminal as before and tighten. Put lid on Summing Box and tighten.
7. With a screw driver, adjust the leveling foot until scale is stable on all four feet.