Metrohm 864 Robotic Balance Sample Processor - Manual (Page 59)

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2 Correct the offset
￭ Correct the value for Rack offset according to the observed devi-
ation from the positioning reticle.
One tick mark corresponds to approximately 0.5°.
￭ Close the rack data configuration and the Sample Processor prop-
erties dialog, in each case with [OK].
3 Check position
￭ In manual control, select the same rack position again and lower
the lift down to the positioning reticle.
Now the adapter tip with the capillary should point to the middle of
the positioning reticle. If this is not the case, then an additional cor-
rection must be made.
3.18 Adjusting the weighing equipment
The weighing equipment must be precisely adjusted in order to ensure a
problem-free weighing of the sample vessels. To weigh a sample, the
sample vessel is moved ahead of Tower 1, i.e. the rack is rotated until the
sample vessel is standing on the weighing plunger with the weighing pan.
The weighing plunger must lift off the sample vessel from the rack with
the weighing pan. Both the vessel and the weighing pan must be free-
standing and are not permitted to touch the rack during the weighing.
In order to ensure that the prerequisites outlined above are in effect, the
horizontal position of the weighing plunger must be centered precisely to
the sample position of the rack. The vertical position of the weighing
plunger must be adjusted in such a way that the sample vessel is lifted off
sufficiently.
1 Prepare
￭ Remove the sample rack.