TEOM Main and Auxiliary Filter Replacement

Purpose: The two in-line filters used on the TEOM are to prevent contamination from reaching the flow controllers. Follow the steps below to exchange the large in-line filter used on the TEOM instrument.

Required Equipment: Adjustable wrench

Open end wrench set

Large Balston Filter

Teflon thread tape

Reference: Section 3: Service Procedures Page 3-4.

1. The two filters are located on the back of the TEOM control unit. One is for the Main flow and the other is for the Auxiliary flow.

2. Change the filters when the instrument is down for a regular filter changeout.

3. Down the TOEM channels with “set flag" option under the “tools” tab on SiteManager.

4. Press the Data Stop button on the front of the TEOM.

5. Remove the in-line filter attached to the Main Flow port (pay attention to the filter position on the tubing). The easiest way to do this is first to remove the tubing from the quick disconnect fittings. Then remove the quick disconnect fittings from the filter.

6. Attach the quick disconnect fittings to the new filter using new Teflon tape. Then attach the tubing to the new filter the same way the old filter was removed. The directional flow arrow on the filter should point away from the control unit. This is done to make accumulation visible.

7. Remove the in-line filter attached to the Auxiliary Flow port (pay attention to the filter position on the tubing). The easiest way to do this is first to remove the tubing from the quick disconnect fittings. Then remove the quick disconnect fittings from the filter.

8. Attach the quick disconnect fittings to the new filter using new Teflon tape. Then attach the tubing to the new filter the same way the old filter was removed. The directional flow arrow on the filter should point away from the control unit. This is done to make accumulation visible.

9. Push the “Run” button on the front of the control unit to put it back into run mode.

10. Perform a normal leak test.

11. If the leak test is passing then close the Scheduled Maintenance ticket with the time and date of the changeout. Include the Leak Test Values if available.