Eagle Microsystems LCWA-HI - Manual (Page 4)

LC-WA HI IB.doc
9/16/04
1. The Weighing Assemblies should be level and parallel so that side loads and
bending moment loads are minimized.
2. The load on each assembly should be roughly equal.
3. The structure being weighed should not touch or rub against supporting structures.
4. The filling or emptying pipes should have flexible sections or run parallel to tank for a
length so that piping is decoupled from tank and will not affect system accuracy.
5. For lower capacity systems, the attachment of pipes and feed chutes to the tank is more
critical in relation to weighing errors.
2.5 HOOK-UP CABLE
1. Route the load cell cables to Summing J Box so that they will not be damaged or cut.
2. Connect the load cell cables to terminals on the Summing J Board.
3. Connect the 6 conductor hook-up cable from the Summing J Board to the load cell
terminal on the Weight Indicator.
Figure 1 shows the wiring connections necessary to attach the load cells to the summing J Board. The
color code and function are as noted.
C O L O R FUNCTION
B L A C K – EXCITATION
W H I T E – SIGNAL
R E D + EXCITATION
G R E E N + SIGNAL
Fig. 1
SECTION 3.0 TROUBLE SHOOTING
The following is a list of potential problems and likely cures.
1. Inaccurate but repeatable weight readings:
a. Adjust span on read-out (see instrument manual)
2. Blank or drifting display:
a. Consult the instrument manual.
b. Look for loose connection in hook-up cable at the instrument or in the Summing Box.
See Section 4.0
d. Look for moisture in the Summing Box
c. Test for bad load cell (see section 4.2)