Sartorius QC34EDE-S, Service Manual

13

SARTORIUS QC - Scales

Adjusting the Upper Middle Stop

– Remove the weighing pan.
– There must not be any load on the scale when the upper middle stop is

being adjusted.

– Adjust the upper middle stop so that the gap between the weighing pan

and the stop is 0.6 mm (tolerance range: + 0.1 mm); check the gap size
with a feeler gauge.

– When the gap is correct, place the weighing pan on the scale.

Adjusting the Corner Stops

– Remove the weighing pan and place it upside down on the scale.
– Place a load equal to the maximum capacity in Position 1 on the

weighing pan.

– Use a feeler gauge to check the distance between the corner stop screws

(115) and the weighing pan.

– Proceed as in the following example to adjust the corner stops:

–

The actual value

 of the gap (as determined with the feeler gauge) is

1mm.

–

The target value

 is 0.25 mm.

–

The deviation

 (actual minus target value) is, in this example, 0.75mm.

–

The lead

 of the stop screws is 1 mm, i.e.:

1 turn clockwise increases the gap by 1 mm
1 turn counter-clockwise decreases the gap by 1 mm

–

The adjustment step

 is calculated from the above values:

1 turn of the stop screw changes the gap size by 1 mm, i.e. in the above
example, you would need to turn the screw ¾   of a turn counter clockwise
to achieve the required adjustment (deviation: 0.75 mm).

– Before adjusting the screws (115), remove the weighing pan from the

scale.

– Proceed in the same manner to adjust the corner stops in positions 2 – 4.
– After completing this adjustment procedure, place the weighing pan right

side up on the scale.

– When you have finished adjusting the corner stops, proceed to the

adjustment/calibration functions.