Demco DA10 User Manual download pdf (Page 32)

Model 640 Weigh Tronix Calibration Procedure

Model: 640

1. Press the On/Off button and the greeting “Hello” should arrear on the screen and then the scale will

return to zero. ( Make sure the scale is empty and hooked up to the towing vehicle )

2. From the G/N mode, press and hold the HOLD/MENU key for three beeps ( 3 sec. ) then release…

SET.PAS is displayed

3. Press the RM button until the number 6 is displayed then press the HOLD/MENU button to move

the cursor one position.

4. Press the RM button until the number 4 is displayed then press the HOLD/MENU button to move

the cursor one position.

5. Press the RM button until the number 0 is displayed then press the PRINT/SELECT button once…

CONFIG should be displayed.

6. Press the HOLD/MENU button until….SPAN is displayed

7. Press the PRINT/SELECT button and now the current weight should be displayed.

8. With either a calibrator or some known weight, put an appropriate weight onto the scale… and the

current weight is displayed.

9. Press the RM key to increase the weight or the M+ key to decrease the weight accordingly.

10. Once the appropriate weight value is shown, press the PRINT/SELECT button… SPAN should

be displayed on the screen.

11. Press the G/N button until the indicator returns to the gross weighing mode. Calibration of the

scale is then complete.

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Demco DA10 User Manual Page 32