Salter-brecknell 405 User Manual download pdf (Page 7)

4. Turn the scale over again and carefully remove the top case from

the base. Figure 1.1 shows the current main board and the

calibration jumper (SWCAL) circled. Figure 1.2 shows the older

version of the main board and the calibration jumper (JP1). The

jumper is shown inside the red oval. The oldest version of the main

board is shown in Figure 1.3.

Figure 1.1 Current main PC board with jumper circled

Figure 1.1 shows the jumper in the calibration unlocked position.

Move the jumper to the other position to lock calibration.

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Salter-brecknell 405 User Manual Page 7