Replacing Parts - OHAUS VF Serie Manual De Instrucciones

VF Series Pallet Scales

10. REPLACING PARTS

10.1 Replacing the Analogue PCB
1) Set scale up on edge.
2) Remove the analogue PCB:
•
Unscrew and remove the cover of the connection box.
•
Detach the connecting wires of the load cells and the connecting cables to the indicator.
•
Mark the cables for subsequent reconnection.
•
Detach the PCB from the retainer and remove it.
3) Reinstall the analogue PCB:
•
Connect the load cells to the analogue PCB by attaching the load cell connecting cable to the
corresponding terminal strip in accordance with the following table:
Terminal
EXC +
SIG +
SIG -
EXC -
•
Attach the connecting cable to the indicator in accordance with the following table:
Terminal
EXC +
SEN +
SIG +
SIG -
SEN -
EXC -
Note: The load cells are calibrated at the factory in such a way that adjustment of the corner load is
usually not required. If corrections are required in individual cases, adjustment can be carried out at the
potentiometer pairs 1, 2, 3 and 4.
10.2 Replacing the Load Cells
Note: Load cells can be damaged by dynamic shocks, for example. They must be replaced if the corner load
test results are not in line with the specified tolerances.
1) Set scale up on edge
2) Disconnect the load cell:
•
Unscrew and remove the cover of the connection box to the analogue PCB.
•
Detach the connecting wires of the concerned load cell from the analogue PCB.
•
Disconnect the respective cable gland and pull out the cable.
3) Replace the load cell:
•
Lay the scale upside down on a suitable surface. When doing so, ensure that the connecting cable
to the indicator is not pulled off.
•
Loosen two Allen screws and remove the concerned load cell.
State Colour
Supply + Green
Signal + White
Signal - Red
Supply - Black
State Colour
Supply + Grey
Control line + Yellow
Signal + White
Signal - Brown
Control line - Green
Supply - Blue
EN-6