CHAPTER 2 : REPLACING LOAD CELLS
2.1
Disassembly
1.
The HTS-150 contains two load cells, one located over each axial
.
These cells can be replaced
individually but will normally be supplied as a pair (to match their performance). Disassemble the trolley
by removing the rear wheels and detaching the top frame from the trolley by undoing the four M6 x 1.0 x
8 m/m cross-head screws and washers (Figure 1). Removing the top frame reveals the 2 cells. Each cell
is held into position by three screws (Figures 2 & 4). The nuts that secure the screws are located on the
underside of the trolley.
2.
The front and rear cells are wired to a PCB board that is located on the front axial cover plate. To access
the PCB, remove the four plastic push clip rivets that connect the cover plate to the trolley. To remove the
PCB card, pinch the end of the two plastic partition pillars and pull off the PCB. Unsolder the following
connections:
a) R1, B1, G1, W1 for the front cell (R = red, B = black, G = green & W = white)
b) R2, B2, G2, W2 for the rear cell.
3.
Three M14 nuts secure each cell on the underside of the trolley. These nuts are accessed by removing
the cover plate located beneath each axial as described in section 2.1.2 above.
2.2
Replacing the front cell.
1. Position the load cell on the top of the trolley frame and insert the three screws through the holes in the
load cell and the trolley (Figure 2).
2. Channel the wire from the load cell through the holes in the frame to the PCB board located beneath the
front cover plate.
Figure 1
