Rice Lake IQ plus 2100, Installation Manual

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Installation 7
3. Remove the five nuts from the CPU board, then lift the board out of the enclosure.
To replace the CPU board, reverse the above procedure. Be sure to reinstall cable ties to secure all cables inside the
indicator enclosure.
2.4 Bench Scale
This section provides instructions for replacing load cell, adjusting lift-up and overload protection screws and
installing the optional clamshell enclosure.
2.4.1 6.6.1 Load Cell Replacement
Use the following procedure to replace the load cell in RL2100 bench scales:
1. Disconnect power to the indicator.
Before opening the indicator enclosure, ensure power to the indicator is disconnected.
2. Disconnect the load cell cable at the indicator.
3. Lift off scale platter. Remove lift-up protection screws from spider plate and base assembly.
4. Use 7/16" wrench to remove upper load cell screws and lock washers. Remove spider plate and upper load
cell shim from load cell.
5. Turn scale over and unscrew overload protection set screw one full turn.
6. Use 7/16" wrench to remove lower load cell screws and lock washers. Remove the lower load cell shim,
load cell and cable.
7. Thread replacement load cell cable through rubber grommet.
8. Position load cell on lower shim. Install lower load cell lock washers and screws. Torque to 80 in-lb (9.0
N-m).
9. Set scale on its feet. Position upper shim on load cell, then install spider plate and lift-up protection screws.
10. Install upper load cell lock washers and screws. Torque to 80 in-lb (9.0 N-m).
11. Replace scale platter. Ensure that scale is level.
12. Connect load cell cable to indicator (see Table 2-2 on page 5).
13. Readjust lift-up protection screws and overload protection set screw as described under Section 6.6.2 on
page 27.
14. Power-up indicator and recalibrate scale.
Figure 2-4. RL2100 Components – Side View
WARNING
Lift-up Protection Screws
Upper Load Cell Screws
Upper Shim
Platter
Spider Plate
Corner Overload
Protection Screw
(one in each corner)
Lower Shim
Lower Load Cell Screws
Overload Protection
Set Screw