Teledyne 200AH 用户手册

 

The particulate filter should be inspected often for signs of plugging or contamination. It is also 
common for dirt particles to absorb NO

2

, thus causing the reading to be low. A discoloration of 

the filter membrane indicates that the filter is dirty and should be changed.  

To change the filter: 

1.  Locate the sample filter on the outside rear panel. 

2.  Unscrew the hold-down ring, remove the Teflon o-ring and then the filter disc. See 

Figure 8-1 for an exploded view of the filter assembly. 

3.  Replace the filter, being careful that the element is fully seated in the bottom of the holder. 

Replace the Teflon o-ring, then screw on the hold-down ring and hand tighten.