http://www.nortekusa.com/en/knowledge-center/forum/general-comments Comments about Nortek or Nortek Doppler instrument, questions about this board, etc. daily 1 2007-11-12T12:20:37Z http://www.nortekusa.com/en/knowledge-center/forum/general-comments/275806965/380604612/view Excellent. Is this for a Vectrino II or Vectrino? If it's a Vectrino II and you run into any troubles just email me. It's a complex instrument and takes a ... 2012-01-26T17:19:55Z Comment http://www.nortekusa.com/en/knowledge-center/forum/general-comments/275806965/461000613/view Sure.  Thanks for the reply.  i think we have all the info we need and a demo arranged for 16th Feb. Martin 2012-01-26T16:08:33Z Comment http://www.nortekusa.com/en/knowledge-center/forum/general-comments/275806965/706267720/view Hi Martin, I sent you an email regarding this earlier this morning. Let me know if you have any follow up questions. P.J. 2012-01-26T15:47:53Z Comment http://www.nortekusa.com/en/knowledge-center/forum/general-comments/275806965/706267719/view We are considering purchasing a new ADV and would like some advice regarding the capabilities of various Vectrinos.  We work in relatively small gravel-bed ... 2012-01-26T13:52:07Z Comment http://www.nortekusa.com/en/knowledge-center/forum/general-comments/503836066/795172874/view Hi Ram, This is really more a fluid mechanics question, but I'll do my best to point you to a few references. Assuming the data came from a Nortek Vectrino ... 2011-11-23T14:20:10Z Comment http://www.nortekusa.com/en/knowledge-center/forum/general-comments/503836066/795172873/view I'm collecting data in turbulent flow (open channel) with a sampling frequency of 30 Hz for 3 min. Does the turbulent dissipation rate estimate using ... 2011-11-23T03:02:12Z Comment http://www.nortekusa.com/en/knowledge-center/forum/general-comments/503836066/795172872/view Hello, I have a spectral analysis plot with frequency (Hz) on x-axis and power spectral density ((cm/s)^2/Hz) on y-axis. My interest is to obtain the ... 2011-11-23T02:48:57Z Comment http://www.nortekusa.com/en/knowledge-center/forum/general-comments/558953575/706090520/view Hi Mo, The higher the velocity data output rate (what you're setting when you select 64 Hz in the configuration dialog) the less internal averaging ... 2011-08-16T20:55:46Z Comment http://www.nortekusa.com/en/knowledge-center/forum/general-comments/558953575/706090519/view Hi all, I am using a  vector for my field experiment. I was planning to set the sampling rate at 64 hz but I have heard that it might cause noise in my ... 2011-08-16T20:23:06Z Comment http://www.nortekusa.com/en/knowledge-center/forum/general-comments/406246191/660667623/view Hi Mary,   If you want reliable readings from the magnetometer a calibration is needed. Most deployment rigs has some part of magnetic material with some ... 2011-08-03T07:39:28Z Comment http://www.nortekusa.com/en/knowledge-center/forum/general-comments/406246191/660667622/view Thanks, Unfortunately I have not done the calibration since I did not see your message before deploying. So now after some days  we pulled out the mooring ... 2011-08-03T01:57:49Z Comment http://www.nortekusa.com/en/knowledge-center/forum/general-comments/406246191/992626143/view Since you plan on using ENU coordinates, it is far easier to pre-calibrate the compass than to post-calibrate and apply a correction. If you plan on using ENU ... 2011-07-27T13:40:39Z Comment http://www.nortekusa.com/en/knowledge-center/forum/general-comments/406246191/682726500/view What if I am not using any magnetic steel around and just got the Vector from company, if I am using ENU, does it need calibration?   2011-07-27T03:20:01Z Comment http://www.nortekusa.com/en/knowledge-center/forum/general-comments/735157137/236073284/view Hi Jason, The flash memory is non-volatile so it should be fine. There are various stories of flooded and otherwise damaged instruments we were still able ... 2011-07-25T13:42:55Z Comment http://www.nortekusa.com/en/knowledge-center/forum/general-comments/735157137/236073283/view Hi   We have a Nortek Aquadopp ADCP deployed however weather has prevented recovery on several occasions. We have had it recording for a 30 day period ... 2011-07-25T08:59:39Z Comment http://www.nortekusa.com/en/knowledge-center/forum/general-comments/406246192/752016178/view Please search the forums for analog input setup help. It has been covered several times. As a start, I would recommend testing with a known DC voltage on one ... 2011-07-24T12:27:05Z Comment http://www.nortekusa.com/en/knowledge-center/forum/general-comments/829285770/936047119/view Use the default to start. If you notice problems in a real time data collection you can easily increase it. P.J. 2011-07-24T12:22:59Z Comment http://www.nortekusa.com/en/knowledge-center/forum/general-comments/406246191/695481063/view Your measurement goals will decide what coordinate system is the best to use. You can change between XYZ and ENU (or ENU to XYZ) in the post processing stage, ... 2011-07-24T12:22:01Z Comment http://www.nortekusa.com/en/knowledge-center/forum/general-comments/829285769/470568553/view The cheapest and easiest way is to find an old CRT and use it's degauss option while the battery "sits" e.g.  on top.  You can get "more serious" ... 2011-07-24T02:17:28Z Comment http://www.nortekusa.com/en/knowledge-center/forum/general-comments/406246192/202168315/view Thanks for the reply. It shows zero  I have another  problem in using my 2 OBS sensors. I have connected them to the Vector and defined them in the planning ... 2011-07-23T23:05:00Z Comment