INFICON 2020ppbPRO Portable Photoionization Detector - Manual (Page 75)

ISP-074-576-P1D 69
Pre-filter Tube Holder
INFICON ’s optional pre-filter Tube Holder (A1790500) is shown in figure 19 below.
The holder will accept the sample intake conditioner tube (F1760162), and the
optional sample collection tubes (e.g., Activated Charcoal Type B, Silicagel Type B
or G).
The tube holder attaches to the 2020ppbPRO on the inlet nozzle replacing the
standard inlet nozzle cap. It is a simple twist lock application.
Figure 19. Tube Holder
To insert a pre-filter tube into the tube holder:
1. Unscrew the top part of the tube holder immediately above the tube
window.
2. Break off each end of the glass tube by inserting the end into the
opening as shown.
3. Insert tube into holder.
4. Re-screw on the top part of the tube holder (note: the tube holder is
designed to compensate for any minor irregularities in the tube that
result from the breaking off of each end).
To remove a pre-filter tube from the tube holder:
1. Unscrew the top part of the tube holder immediately above the tube
window.
2. Lift the pre-filter tube from the tube holder.
3. Either insert another tube or re-attach the top part of the tube holder.