Sartorius QC34EDE-S, Service Manual

21

SARTORIUS QC - Scales

– Lay the scale on its side.
– Remove the cover plate (209) from the holder (210) (A).
– Remove the strain gauge system connecting wire from the bottom

plate (106) (remove the strain relief (105)).

– Unscrew the strain gauge system (103) from the bottom plate (106).
– Unwind the strain gauge system connecting wire from the bottom plate

and remove the strain gauge system.

– Place the new strain gauge system (103/113) on the bottom plate (106)

and screw it down loosely.

– Position the strain gauge system (103/113) and tighten the fastening

screws to 25 Nm.

– Attach the strain gauge system connecting wire to the bottom plate (106)

(re-attach the strain relief).

– Loosely attach the screws that hold the pan support (102) on the strain

gauge system, then position it and tighten the screws (25 Nm).

– Now pull the strain gauge system connecting wire into the display unit

holder.

– Thread the strain gauge system connecting wire through the opening in

the rear panel of the display unit (104) and put the washer (104.C) in
place.

– Fasten the strain gauge system connecting wire (and the data output

cable,
if any) with the cable clamp (103).

– Attach the rear panel of the display unit (104) to the display unit

holder (108) with the two retainers (104.B).

– Replace the front panel with the main PCB.

– Now perform a through check and, where necessary, readjustment of the

following points:

Overload stops
Zero point offset value
Linearity
Span (Sensitivity)

– The scale is now ready for operation.