Rice Lake JB1010 Signal/Excitation Trim - Manual (Page 6)

3
Wire Preparation
The JB1010 uses spring-loaded, quick-connect wire terminals. These con nec tors are very re li-
able if used properly.
To prepare the wires, strip 3/8" of in su la tion from the in di vid u al wires. If the con duc tors are
stranded wires, tin the ends of the wires using wire solder with a non-cor ro sive solder fl ux.
Inserting the Wires into the Terminals
Push down on the plastic lever with a pen or small screw driv er to compress the spring. See Figure
3-1. Install the wire into the com pres sion clamps. Push the wire into the con nec tor until the wire
is fully seated. Make sure the clamp is resting on the stripped portion of the wire and not on the
insulation. Release the lever and pull on the wire to make sure it is secure.
4.0 Wiring for New Systems
Use the following procedure to set up a new system.
1. Connect all cells with trimming disabled as shown in Figure 4-1.
2. Connect the cells to the junction box using the connectors marked Sections
1 to 5, Cell A and B. If pairs of load cells are to be trimmed in sec tions (as
with truck or track scales), wire both cells to the same ten-position con-
nec tor. If using less than ten cells, leave unused connectors empty.
3. If you have an odd number of load cells, connect the odd cell to a Cell A
input unused cell connector. Confi gure that con nec tor as shown in Figure
4-2. You must disable the trim ming to any unused cell connectors, shown
in Figure 4-1.
4. Connect the indicator cable to the terminal strip marked TO IN DI CA TOR .
Use six wire shielded cable and activate the remote sensing of the in di ca tor.
Remote sensing will compensate for resistance changes due to en vi ron men tal
changes.
5. Turn on the indicator. If the indicator reading appears stable, consider
doing a tem po rary cal i bra tion. Set a known weight on the scale deck and
perform a cal i bra tion se quence to set the sen si tiv i ty of the meter to about
the fi nal cal i bra tion required.
If the sys tem fails to repeat to zero or ex hib its in sta bil i ty, you must fi x
the problem before continuing. You cannot trim a system that will not
re peat.
If all you want to do is connect the cells in parallel, you are fi nished. Do
a fi nal calibration of the system using the zero and span ad just ments on
the weight indicator.
6. If you want to trim the system for matched load cell output, go to Step 1
on the following page.
Figure 3-1.
Wire Terminals
SECT
-EXC
SWA
TO DISABLE ANY CHANNEL
NO TRIMMING
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
CELL/SECT
"B"
SECT
+EXC
SWB
CELL
"A"
O
F
F
O
F
F
ROCKER
DOWN
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
SECT
+EXC
SECT
-EXC
SWB
SWA
ODD NUMBER OF CELLS
SIGNAL TRIM
INDIVIDUAL (A) ONLY
1K ISOLATION RESISTORS
A IS ODD NUMBERED CELL
B IS UNUSED
CELL
"A"
CELL/SECT
"B"
O
F
F
O
F
F
ROCKER
DOWN
Figure 4-1.
Figure 4-2.