TCCON > Sites > East Trout Lake > Instrument History > Site Visit 2016-07-31

Site Visit 2016-07-31

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The purpose of the site visit in July/August 2016 was to install the suntracker pedestal and test the tracker. If time permitted we would also install the web camera. 


Initially we checked the placement of the 10.75" OD PVC tube relative to the lab floor




There is ample room around the Bruker 125HR, 48" between the North-East wall, 28" between the North-West Wall and 46" between the South-East Wall. 


The deck has been installed by Darren B (DNB Construction - 306-940-5336). The deck has cross braces on the North East and North West end but is not attached to the building. The deck is noticiably stiffer than before. We are contemplating improving the rigidity.





To install the suntracker pedestal we first needed to install the i-beams. The I-beams were to run accross the deck joists and attach to the deck via some Simpson Strong-Tie Model # EPB44PHDG 4 in. x 4 in. 12-Gauge Hot-Dip Galvanized Pier Block Elevated Post Base (purchased from Home Hardware - item 2649-745). 


The deck was made with double thickness joists at the North-East and South-East ends of the deck, however none of the joists were double thickness in the middle so we added a 2x8" piece of lumber in the middle. We had to remove some deck planks to gain access to the joists, these can be removed with a flat bar or crow bar. The planks are nailed down and one needs to pry them up one joist at a time. By the time you get to the end of the deck the planks should become loose. 


The brackets were made to be level with the joist by chiselling down a section of the joists. At first this wasn't done and we found the deck planks rocked on the brackets. The brackets were also wider (3.5") than the two joists put together so we used some scrap wood to fill in the opening in the bracket. The brackets were bolted with 1/2" bolts and two nuts to stop them from coming loose (as well as Loktite). Once everything was in place we nailed the brackets in place to stop them rotating. 





With the brackets in place we cut holes in the deck planks to allow the 3/4" posts from the brackets to pass through. The I-beams were placed on top of these 3/4" posts and positions marked. The post position was then measured exactly from post to post and this distance was marked on the I-beam. A 7/8" hole was drilled in the I-beam to allow the post to past through. 

It was found that the 3/4" post was too long and was fowling on the top of the I-beam. We cut the post down by 2" to fit in the I-beam using a angle grinder. 


We placed the I-beam on top of the post and bolted it down and checked the level. The level of the deck is very good and we found that the level on the joists was also good. The I-beams had a slight bow to them (arcing up in the middle) but bolting them down brought them down to level. We've used Loktite on the bolts but we have some 3/4" bolts with nylon inserts which can be isntalled in September 2016.


With the I-beams installed we now placed the tracker baseplate ontop and marked out the level the 10.75" OD PVC tube should be cut at. A jig saw was used to cut the PVC tube to this height. The cut was not perfect but was close enough to allow sealing with some LePage 295mL Quad Exterior Sealant (done later). 

With the tube cut the tracker pedestal base plate was assembeld to the 10" tube and the centering plate was installed on the top of the tube.This centering plate allowed a plumb bob to be hung fron the center of the tube so as to position the pedestal in the center of the 10.75" OD PVC tube. 


 The center of the plumb bob was marked on the floor with some tape, the central position is along the tape in the top right quadrant (arrow points to it). In doing this centering it was found that the 


With the tracker pedestal installed we could now assemble the Bruker A547N on top of it. When we began to uncrate the tracker we noticed it's securing bolts had been damaged in shipping. The bolt heads were exposed on the underside of the crate and must have been hit by the pallet jack or forklift. The bolt locations had been clearly marked on both sides of the crates but the shipping company (Manitoulin Transport - Quote 200636270 UNIVERSITY OF TORONTO re PU#  8923868 re pro 72480942) must not have noticed. The bolts were secured to the lower Bruker A547N plate and I don't believe any serious damage has occurred, although it would be safe to assume the mirrors suffered a jolt. Given they'll need re-alignment anyway I hope this isn't a problem. 




The Bruker A547N was then dissassembled and installed on the tracker pedestal by following the instructions SIL Cover dissassembly for Bruker A547N installation.docx. 


The cables were routed down the cable routing plate quite easily, however initially done with too much slack. The following photos show the tracker at Azimuth 0 degrees (SIL cover parallel to I-Beams and) and Azimuth 336 degrees (SIL Cover handle slightly east of I-Beams). A severe thunderstorm was approaching so we needed to stop the installation and cover up the tracker with tarp. We returned the following day and adjusted the cable lenth and checked the tracker rotation. The tracker cables can hang with enough slack to not touch the pedestal base plate but not get caught when rotating between 0-336 Azimuth. It should be noted that the offsets put on the tracker were not checked. Hence this rotation to 0 and 336 most probably does not line up with the actual 0-336. For example the 0 degree Aziumth appears to be pointing at ~90 Degrees Azimuth (i.e. East). There was no time to check into the tracker settings so this will need to be done in September. 





With the cables routed correctly we then installed some shelving in the lab which can hold the Bruker A547N control box and SIL cover hardware. 



We then deconstructred the Bruker A547N tracker and placed it inside the pump room along with the photodiode telescope. The tracker pedestal was sealed on the 10" tube using a sealing plate. We had some difficulty here as the o-rings would not stay in the plate. We had to silicon them in place . The bolt holes were then siliconed shut (bolt holes for cable routing as well). 




The last thing we did was install the StarDot Netcam XL camera. The cable was routed out the hole behind the picaro and then along side the side of the builing and the camera was installed in the North-East railing. Senen Racki (EC) then opened up the camera port so it could be seen outside the EC Network (see email below). 



RE: East Trout Lake network access Mon 1/8/2016 9:02 PM

Judging by the DHCP entry in the router, it appears that you're using a NetCam product.  I Googled for IP forwarding information and they say to forward 8100 and 8124, so that's what I did.  However, when I tried to access the camera using the following URL it didn't work: 


So I remote'd into our Picarro computer and used the browser from there: 


That didn't work.  Then I thought, maybe the default HTTP port is being used, so I tried: 


That worked, so I changed the firewall rule to route external 8100 to internal 80.  Now the first URL  works also: 


Let me know if this is ok or if you need any other changes. 









With the remaining time I planed out the CaF2 plate install and LN2 generation installtion. 


The 10.75" OD PVC tube which enters the lab is acutally recessed 0-11 mm at points around the circumference. The gap between the tube and the drywall is very small and it would be a little tricky to fit the appropriate PVC flange (10" Sch 80 PVC Van Stone Slip Flange 854-100). The current CaF2 plate could be made to fit if the cable hole is moved (original one covered up). The gap between the PVC tube and CaF2 plate could be sealed with silicon which should be sufficient for the amount of water that is expeted to enter the tube. I would expect the silicon won't stand up to a large amount of water but that is unlikely. 



The pump room is generally ready for the LN2 to be installed. There are some pumps in the way of the Quincy QR-25 intended location but these should be able to be worked around. The filter bank will be able to be installed on the wall if we get two 2x4" 50" long. These can attach to the vertical joists of the room which are separated by 16". The filter bank can be bolted to this. Hence purchase list is


1) 2 @ 2x4" x 50"

2) 1" lug bolts to attach filter bank to 2x4"

3) 4" screws to attach 2x4" to joists

4) Rigid insulation to place on back of filter bank to avoid the cold freezing the filters. 



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 ETL Installation notes.docx
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25.04 kB06:02, 11 Aug 2016orfeoActions
 SIL Cover dissassembly for Bruker A547N installation.docx
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1668.37 kB06:02, 11 Aug 2016orfeoActions