I cleaned the BICs on May 14. They were very fouled. On May 16 the SAMI was recovered, cleaned, and chemicals replaced. The battery was surprisingly still good,i.e. 13.1 volts so I did not replace it. The SAMI was reinstalled on the stick later in the day. Hopefully it is now reporting data.
Chris Langdon
This site is for recording maintenance records of the La Parguera Marine Reserve NOAA ICON/CREWS station for data management purposes. Please update this blog whenever new operations are performed in the field, so that NOAA/AOML can coordinate data management efforts with the La Parguera ICON/CREWS station field efforts.
Thursday, May 17, 2007
Maintenance Log
Just a note to let you know the students work this semester.
Here is a small table of when/what for the CREWS.
Francisco
2/1/2007, Complete, CTD validation
2/15/2007, Basic, Cleanded algal growth on chains, and mainframe
3/5/2007, Complete, CTD validation
3/13/2007, Basic, cleaned and examined all gauges, stantions, and chain links
3/27/2007, Complete, CTD validation, need screens
4/17/2007, Basic, cleaned algal growth on chains, and mainframe
5/2/2007, Complete, CTD validiation, changed 3 of 4 screens
5/15/2007, Basic, cleaned algal growth on chains, and mainframe
Here is a small table of when/what for the CREWS.
Francisco
2/1/2007, Complete, CTD validation
2/15/2007, Basic, Cleanded algal growth on chains, and mainframe
3/5/2007, Complete, CTD validation
3/13/2007, Basic, cleaned and examined all gauges, stantions, and chain links
3/27/2007, Complete, CTD validation, need screens
4/17/2007, Basic, cleaned algal growth on chains, and mainframe
5/2/2007, Complete, CTD validiation, changed 3 of 4 screens
5/15/2007, Basic, cleaned algal growth on chains, and mainframe
Monday, May 14, 2007
Samples for Ocean Acidification Studies Taken
On 5/14/07 the BIC sensors were observed to be heavily fouled. I cleaned
both.
Water samples for TA, DIC and O2 were collected on 5/14. 5/15, 5/16, 5/17 and 5/18. These data indicate that the SAMI was reading high by 84 uatm before the change of chemicals on 5/16/07.
Jorge's SeaCat CTD was profiled at the stick on 5/15 and 5/18.
The AOML water sampler was deployed at the stck on 5/17 and 5/18 and collected twelve good samples. Unfortunately the SAMI was not operational that the time.
Chris
Tuesday, April 24, 2007
Maintenance Update
We have been maintaining every two weeks, ground through the CTD every other cleaning (once a month).
Francisco
Francisco
Thursday, February 01, 2007
Wednesday, January 31, 2007
Basic Maintenance
Basic cleaning and maintenance occurred some time in January.
[Entered for Francisco by Jim.]
[Entered for Francisco by Jim.]
Tuesday, December 26, 2006
notes from maintenance trip (Dec 18 - 21, 2006)
Our trip lasted from Monday, December 18th through Thursday, December 21st. The team for this trip was Chris Langdon, Derek Manzello and Mike Jankulak (me). Alfonso (a student at UPR) stepped in at the last minute to pilot our boat on the 19th and 20th.
On Tuesday the 19th, we removed the electronics package (the "brain") and retrieved the SAMI pCO2 sensor. Both were brought back to the lab for work that afternoon and evening. Also, Chris reports that he cleaned the underwater light sensors.
Back at the lab, Chris downloaded the stored data from the SAMI, and it appears as though the instrument has been worked properly since its deployment in November. The "brain" had the following work done:
On Wednesday the 20th, we started by completely replacing the satellite antenna and its cable, then reinstalled the "brain" package. At the same time, Chris and Derek redeployed the SAMI and cleaned the CTDs.
In our first post-installation test the Deep BIC was offline due to its power (+12V) wire having come loose, so the station was re-opened to correct this problem. However, all other instruments (including the Groundtruth CT and the SAMI itself) were working okay. In subsequent tests, 100% of station instrumentation was found to be connected properly and reporting correctly.
Note: we observed a large bird "parked" on the surface light sensor for parts of Wednesday morning. We have one picture of this bird. There was also a lot of bird guano on the satellite antenna, which is the largest, highest and flattest part of the station.
Conclusions: the SAMI is now connected and its data is available on our web site. We conclude that there was never any cable or wiring problems with the SAMI and the reason it didn't report data after the November trip was the incorrect baud rate (the SAMI was set to 19.2K baud, the datalogger to 9600 baud). This problem was fixed by updating the datalogger baud rate to 19.2K for the SAMI since we didn't have the needed hardware to change the baud rate on the SAMI.
Also, initial performance of the replaced transmitter/cable/antenna was encouraging although since then we've seen evidence that the transmitter may still be dropping transmissions as before (see, e.g., records from the early hours of December 24th). Since the transmitter, cable and satellite antenna have all been replaced it seems possible that something external is interfering with transmissions. I'm going to ask CSI whether this could be caused by a bird perching on the antenna (!).
Also note that UPR will need us to send them more copper screens for the CTDs.
-- Mike J+
On Tuesday the 19th, we removed the electronics package (the "brain") and retrieved the SAMI pCO2 sensor. Both were brought back to the lab for work that afternoon and evening. Also, Chris reports that he cleaned the underwater light sensors.
Back at the lab, Chris downloaded the stored data from the SAMI, and it appears as though the instrument has been worked properly since its deployment in November. The "brain" had the following work done:
- the RF400 was updated to the latest firmware and set to 38.4K baud (and radio communications were tested in the lab)
- the barometer, whose molex plug was broken during removal, was rewired directly to the datalogger ports
- the transmitter was replaced with a unit brought from Miami for this purpose
- the datalogger program was updated to communicate with the SAMI at 19.2K baud (instead of 9600 baud)
- all stored data was downloaded from the memory module
On Wednesday the 20th, we started by completely replacing the satellite antenna and its cable, then reinstalled the "brain" package. At the same time, Chris and Derek redeployed the SAMI and cleaned the CTDs.
In our first post-installation test the Deep BIC was offline due to its power (+12V) wire having come loose, so the station was re-opened to correct this problem. However, all other instruments (including the Groundtruth CT and the SAMI itself) were working okay. In subsequent tests, 100% of station instrumentation was found to be connected properly and reporting correctly.
Note: we observed a large bird "parked" on the surface light sensor for parts of Wednesday morning. We have one picture of this bird. There was also a lot of bird guano on the satellite antenna, which is the largest, highest and flattest part of the station.
Conclusions: the SAMI is now connected and its data is available on our web site. We conclude that there was never any cable or wiring problems with the SAMI and the reason it didn't report data after the November trip was the incorrect baud rate (the SAMI was set to 19.2K baud, the datalogger to 9600 baud). This problem was fixed by updating the datalogger baud rate to 19.2K for the SAMI since we didn't have the needed hardware to change the baud rate on the SAMI.
Also, initial performance of the replaced transmitter/cable/antenna was encouraging although since then we've seen evidence that the transmitter may still be dropping transmissions as before (see, e.g., records from the early hours of December 24th). Since the transmitter, cable and satellite antenna have all been replaced it seems possible that something external is interfering with transmissions. I'm going to ask CSI whether this could be caused by a bird perching on the antenna (!).
Also note that UPR will need us to send them more copper screens for the CTDs.
-- Mike J+
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