Teledyne 100AH instruction manual Replacing the Sample Particulate Filter

Teledyne API Model 100AH SO2 Analyzer Instruction Manual, 02417, Rev. D

9.2 Replacing the Sample Particulate Filter

The particulate filter should be inspected often for signs of plugging or contamination. It is also common for dirt particles to absorb SO2, thus causing those readings to be lower than the actual value. A very dirty filter can cause serious monitoring problem such as very slow and low response, inability to span, and contamination of the analyzer. The particulate filter should be changed at a minimum every 2 weeks. If the instrument is operated under high dust environment, the particulate filter should be replaced more frequently.

To check and change the filter (refer to Figure 9-1):

1.Locate the filter on the rear panel of the analyzer, unscrew the hold-down ring and visually inspect the filter.

2.If the filter appears dirty, remove the o-ring and then the filter.

3.Replace the filter, being careful that the element is fully seated in the bottom of the holder. Replace the o-ring, then screw on the hold-down ring and hand tighten.

9-2