Tekran RPF and Zero Filter Changeout

Purpose: Replace the Regenerable Particulate Filter (RPF) in the 1135 inlet module, the zero air filter in the 1130 denuder module and the zero air filter on the 2537.

Required Equipment: RPF (Obtained from URG)

Two Filter Wrenches

47mm 1um Teflon Filter

Reference: SOPMAN Pages XX-XX

Before changing the filters or the RPF take notice of the sampling sequence. The status flag for Hg(0) is “0”. If the Tekran is running in Hg(0) mode then put it in stop mode. If the Tekran is in any other mode then wait for it to finish the cycle before putting it into stop.

Replacing the RPF

1. Make sure a good RPF is available. Currently all RPFs are sent to URG for refurbishment then URG will send two clean and ready to use RPFs back to the site.
2. Open the front of the 1130 denuder module and the top of the 1135 particulate module.

3. 

   
   Looking at the RPF from the top of the 1135 there is a Teflon elbow on the right side. Disconnect the elbow from the 3/8” quartz tube of the RPF.

4. If the RPF has a mounting bracket, loosen the screws holding the RPF in place.
5. In the 1130 denuder module there is a red connection on the left side that holds the denuder and RPF together. Loosen the red nut that is connected to the RPF and slowly pull the RPF up and out of the 1135.

6. Install the new RPF in reverse order by slowly pushing it down through the 1135 and tightening the red nut onto the RPF.
7. Tighten the mounting bracket screws to hold the RPF in place. If this is done properly then there is less chance to break the RPF.
8. Reconnect the Teflon elbow on the 3/8” quartz tube of the RPF.
9. The new RPF installation is now complete.

Replacing the 2537 Zero Air Filter

1. To replace the 2537 zero air filter put one of the filter wrenches on the outlet of the filter housing and the other filter wrench on the inlet. Note: In most cases the outlet of the filter is already sitting in a filter wrench. This makes changing the filter possible with the use of only one filter wrench.

2. Using the two wrenches loosen the filter housing. The tubing connected to the top or inlet side of the filter housing may need to be loosened so that the tubing doesn’t twist.
3. After the two halves of the filter housing are separated pull the old filter off and replace it with a new 1um Teflon Filter with the smooth Teflon side up & the fibrous backing side downstream. (The Teflon filter is made by Pall and is a 47mm – 1um filter. The product number is R2PL047 and comes in a package of 50. If they are ordered through VWR the part number is 28139-125.
4. Put the filter housing back together and cinch it down using the filter wrenches. Be sure to tighten any tubing loosened during the changeout.
5. The 2537 zero air filter changeout is now complete.

Replacing the 1130 Denuder Module Zero Air Filter

1. To replace the 1130 denuder module zero air filter put one of the filter wrenches on the outlet of the filter housing and the other filter wrench on the inlet.

2. Using the two wrenches loosen the filter housing. The tubing connected to the top or inlet side of the filter housing may need to be loosened so that the tubing doesn’t twist. It is very important that the tubing doesn’t twist. If it does it may break the RPF that is upstream of the filter.
3. After the two halves of the filter housing are separated pull the old filter off and replace it with a new 1um Teflon Filter with the smooth Teflon side up & the fibrous backing side downstream. (The Teflon filter is made by Pall and is a 47mm – 1um filter. The product number is R2PL047 and comes in a package of 50. If they are ordered through VWR the part number is 28139-125.
4. Put the filter housing back together and cinch it down using the filter wrenches. Be sure to tighten any tubing loosened during the changeout
5. The 1130 denuder module zero air filter changeout is now complete.

When the RPF and all filters have been changed be sure to put the Tekran back into RUN mode.