Retsch PP 25 - Manual (Page 21)

Operating the machine
21
• Build up some pressure force by moving the hand lever (B) forwards and
backwards until the pellet (PR) along with the pressure pieces fall out of the
die tool.
• Alternatively, you can press the pellet out of the die tool by turning
the threaded spindle (D).
• Open the shut-off valve (H) by turning in an anti-clockwise direction.
Fig. 7: Turning the die tool to allow removal
• Turn the die tool backwards by 180°.
• Remove the die tool.
• Then clean the die tool.
5.5.5 Instructions on Handling the Die Tool and the Pressing Plates
NOTE
Depending on the material and its composition, sample residue (e.g. salt residue)
clinging to the die tool can be very corrosive and cause irreparable damage to the
die tool. Please therefore clean the entire die tool thoroughly with water and then
with alcohol.
Store the die tool and its individual parts in as dry a place as possible until it is next
used.
Never scratch the pressing plates with a sharp object. You can remove hardened
sample residue with blotting or filter paper.
After cleaning them, keep the pressing plates in the accompanying boxes as
protection.
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5.6 Die Tool – Alternative Insertion
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In samples
• in which you cannot mix in any wax to stabilise the pellet or
• in unstable samples that are hard to compress
an alternative method of using the die tool is recommendable. This prevents pellets
falling when they are being ejected.
• Prepare the die tool and the sample as described in the previous chapter.
PR