Holtgreven Truck Scale Resources - Manual (Page 30)

PT300 Users manual
Rev G, Feb 2011
Page 30 of 44
Calibration Enable Jumper
To access the calibration mode the shorting strap labeled “RUN/CAL”, located on the right-middle
of the circuit board (Intercomp, A/D 20 BIT rev E), it must be moved from shorting pins 2 and
3(RUN); to shorting pins 1 and 2(CAL). To access the shorting strap, remove the 10 screws on
the outside edges of the display assembly. Carefully lift the display assembly up and place the
assembly, display side down, on top of the weighing platform.
Following calibration, replace the strap to shorting pins 2 and 3 (RUN); replace the assembly and
reattach the assembly with the screws. This will ensure that the calibration information of the
scale is protected from being changed.
Note: Care must be taken to ensure the wire harness is seated properly to prevent it from
being pinched between the display assembly and the scale casing.