Metrohm 858 Professional Sample Processor - Manual (Page 34)

3.8 Mounting the sample tube ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
26 ￭￭￭￭￭￭￭￭ 858 Professional Sample Processor
3 Nut
4.766.4320 (or 6.2833.020 + 6.2744.080) 4 Ring wedge
5 Needle holder 6 Sample tube
6.2846.000 (zirconium oxide) or
6.1835.020 / 6.1835.040 / 6.1835.050
(made of PEEK)
This is how you mount needle and capillary:
1 Remove the PEEK pressure screw
Loosen and remove the nut (23-3) screwed onto the needle holder.
2 Insert the needle
￭ Insert the needle from above part way into the opening of the
needle holder (23-5).
￭ Pull the PEEK ring wedge (23-4) down over the needle from
above. The narrow side of the seal must face upwards.
3 Fasten the needle
￭ Screw the nut (23-3) into the needle holder. Slight pressure will
be required from below to push the needle upward while doing
this.
￭ Use your hand to screw the nut in the needle holder tight (do not
use any tools!).
4 Connect the capillary
￭ Pull the 6.2744.010 PEEK pressure screw (23-2) over the end of
the capillary.
￭ Manually screw tight the PEEK pressure screw with the capillary in
the nut of the needle holder. The capillary must be pressed tight
while doing so.