LC Packings Probot 161403, User Manual

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Appendix D
D-2
D960R3
User’s Manual Probot
D.2 General Design
A lift magnet controls the position of the standard needle tee and the hollow
stainless steel needle which guides the fused silica capillary. Depending on the
position of the needle tee, the tip of the fused silica capillary is either inside or
outside the stainless steel needle. A vacuum line is connected to the side
position of the needle tee.
FIGURE D-1 shows the stainless steel needle in the lower position (e.g. the lift
magnet is not powered). The tip of the fused silica capillary is covered by the
needle. The vacuum will draw the solvent into the waste container.
Tubing from
Vacuum Pump
~ 1 mm
Stainless Steel Needle
Fused Silica Capillary
FIGURE D-1 The Needle in lower Position
FIGURE D-2 shows the needle tee in the upper position (e.g. the lift magnet is
powered). The needle is lifted by approximately 5 mm so that the tip of the fused
silica capillary extends the tip of the steel needle by approximately 4 mm.
~4 mm
Stainless Steel Needle
Fused Silica Capillary
FIGURE D-2 The Needle in upper Position