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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

Содержание HTS-150

Страница 1: ...0 Hand Truck Scale Salter Brecknell Weighing Products 1000 Armstrong Drive Fairmont Minnesota 56031 Toll Free 800 637 0529 Voice 507 238 8702 Fax 507 238 8271 www salterbrecknell com Copyright 2001 20...

Страница 2: ...technical information than is presented in the HTS 150 Instruction Manual should use this manual Any component level troubleshooting or board replacement should be performed by qualified personnel onl...

Страница 3: ...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 pil...

Страница 4: ...gure 3 2 3 Replacing the rear cell 1 Position the cell on the top of the trolley frame and insert the three screws through the holes in the cell and the trolley Figure 4 2 Channel the wire from the lo...

Страница 5: ...Note At this stage only fasten the nuts finger tight 2 4 Assembly of the frame 1 Reassemble the trolley Insert the ends of the cells into the slots in the top frame Figure 5 2 Tighten the 4 screws M6...

Страница 6: ...3 Torque to 100kg 5 Fit the rear and front wheels Figure 7 2 5 Connecting the cells to the PCB The front and rear cells are wired to the PCB board located on the front axial cover 1 Solder the front l...

Страница 7: ...Unscrew head unit from frame 2 Unsolder the indicator wires at R B G and W on the PCB 3 Unsolder the screen cable from the edge of the PCB 4 Reassemble with replacement head and re calibrate scale se...

Страница 8: ...000 to 6000 counts 5 Press TARE key display shows CAL and then the calibration weight Note If the zero count is not within 500 to 5000 you will need to replace the resistor R1 on the PCB card Figure 8...

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