Salter Brecknell HTS-150 Manual de usuario

Service Manual

Salter Brecknell HTS-150 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

CHAPTER 1: INTRODUCTION

Service and maintenance personnel who desire more 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 only.

For operating instructions, please refer to Instruction Manual 76103-342.

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

Figure 2

3. Place the trolley up-side down, connect the earth lead, the washers and fasten the three nuts. (Figure 3)

Note: At this stage only tighten the nuts finger tight.

Figure 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 load cell through the holes in the frame and along the plastic wire channel strip

running the length of the trolley, to the PCB board located beneath the front cover plate.

Figure 4

3. Place the trolley up-side down, connect the earth lead, the washers and fasten the three nuts.

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 x 1.0 x 8 m/m cross-head screws) with washers to secure the two halves of the

frame (Figure 6).

Figure 5

Figure 6

3. Place the Trolley up-side down. Push the frame into its correct position and ensure the cells are parallel

(Figure 7).

4. Now tighten the nuts that fasten the cells to the frame (refer to section 2.2.3 and 2.4.3). 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 load cell at R1, B1, G1 and W1.

2. Solder the rear load cell at R2, B2, G2 and W2

3. Terminate the load cell screen onto the edge of the PCB.

2.6 Calibration

The scale will need to be re-calibrated. Please refer to Chapter 5

CHAPTER 3 : INDICATOR HEAD UNIT

2.1 Replacing the battery pack

1. Unscrew head unit from frame.

2. Undo the 4 screws on the plastic end covers.

3. Pull out the battery pack / display board.

4. Unplug battery connector from the PCB display board and replace with new battery pack.

5. Reassemble (check display is returned to its correct position).

2.2 Replacing the indicator head

The indicator is connected to a PCB board that is located on the front axial cover plate. To access the PCB, remove

the four plastic 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.

1. 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 (see Chapter 5).

CHAPTER 4 : SETUP MODE

In setup mode you can set the following functions:

Weighing units kg, lb or oz (ON or OFF)

Auto shutoff 120, 180, 240, 300 or OFF (all times in seconds)

Calibration weight 25kg, 50kg, 100kg, 150kg, 25lb, 50lb, 150lb, 300lb

4.1 Function setup

1. Press and hold the TARE key until display shows SET.

2. Release TARE key, display shows UNIT.

3. Press UNIT key to select an option

4. Press NET/GROS key to enter an option and to save.

5. To exit setup mode, when display shows END, press NET/GROSS key

SET

UNITS A.OFF CAP END

Press NET GROSS key

25kg - 50kg - 100kg - 150kg - 25lb - 50lb - 100lb - 300lb

120 - 180 - 240 - 300 - OFF

kg lb oz

ON - OFF ON – OFF ON - OFF

CHAPTER 5 : CALIBRATION

1. Place a large flat plate or batons across the trolley’s weighing platter.

2. Press and hold the ON key and press UNIT key 3 times, display shows zero count, which should read

between 500 to 5000 counts.

3. Press TARE key.

4. Load an appropriate calibration span load (see Chapter 4) onto the center of the scale The display shows

the span count which should be between 4000 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). This resistor will normally be 100K~300K.

Figure 8

CHAPTER 6 : SPARE PARTS LIST

Item Part No.

Rear wheel assembly MQ10002-0

Front wheel assembly MQ10001-0

100 – 240V Adapter

(UK, EU, USA)

ME00264-4

Display head assembly – c/w battery

and lead

SE90371-0

Rechargeable battery pack ME00240-7

Load Cells (pair) SS00079-0

Overlay MP10031-8

Snap hooks MM10020-7

J box PCB ME00191-5

User Manual 76103-342

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