User Manual

ISP-074-575-P1D 75

NOTE: A DB-25, female connector is sometimes a parallel port. Do not connect the serial

port of the converter to a parallel port.

Pre-filter Tube Holder

INFICON’s optional Pre-Filter Tube Holder (A1790500) is shown in figure 24

below. The holder will accept the optional benzene pre-filter tube (F1760161), the

optional activated charcoal pre-filter tube (F1760160) for clean air calibration, the

optional humidity reduction tube (F1760162), and the optional charcoal sample

collection tube (F1760163).

The tube holder attaches to the 2020ComboPRO on the inlet nozzle replacing the

standard inlet nozzle cap. It is a simple twist lock application.

Figure 25. 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 the ends of the glass tube by inserting the tube end into the

hole just above the tube holder window and snapping off the end.

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.