Teledyne 460H Maintenance, Replacing the gas filter element, Degree of Protection

6.0Maintenance

6.1Replacing the gas filter element

The Model 460H is equipped with a gas filter on the ozone inlet. These filters accept 25mm diameter glass fiber elements. Only filter elements of borosilicate glass or quartz fibers should be used. When the instrument is first installed, the sample filters should be checked at least once a week for particulate loading and replaced if necessary. Once the replacement frequency is determined, a regular schedule for filter replacement should be instituted.

For replacement 25mm filter elements, please contact API’s sales department and request part number 02851.

Filter Replacement Procedure:

1.First ensure that the gas delivery line is not under pressure and has been purged of ozone.

2.Remove the four screws securing the gas filter assembly.

3.Remove the bottom half of the filter housing

4.Examine the internal sealing o-ring and replace if necessary.

5.Pull out the stainless steel screen securing the filter element.

6.The element can now be removed and replaced. When re-assembling filter, make sure that the top stainless steel screen is pushed into the filter cavity, securing the element in place.

7.After re-assembly, the gas line should be pressurized with oxygen or dry air and checked for leaks using a bubble solution.

6.2Cleaning Exterior Surfaces of the M460H

If necessary, the exterior surfaces of M454H can be cleaned with a damp cloth. Do not attempt to clean any of the other surfaces of the instrument. Do not submerge any part of the instrument in water or cleaning solution.

6.3 Degree of Protection

The Model 460NEMA has a water ingress rating of IPX65 which indicates that it can withstand strong jets of water and is totally protected against dust.

P/N 03662D Teledyne API Model 460H O3 Monitor Operator Manual - Page 33