Vectrino configuration file and Analog out

Hi,

I'd like to use Labjack and Matlab to collect velocity data from my Vectrino+ and external sensors. I currently have the data from both instruments synchronized and data starts collecting upon starting my Matlab script. I have a few questions.

1.) In the configuration editor I've checked the box "Analog outputs" and chose a nominal velocity range. I pressed "Update" and loaded it to the Vectrino. I assume this is configuration file being used?

2.) I expected the voltages in a still bucket of water to be around 2.5 and to be nearly the same on all channels...Assume a nominal velocity of +/- 0.3 m/s 

0 volts = -0.3 m/s          2.5 volts = 0 m/s      5 volts =  0.3 m/s

voltages on the x and y channels are around 0.001, voltage on z1 is around 0.05 I have not hooked up z2 yet. I have very little experience with this sort of stuff and I seem to be missing something, can anybody help fill in the gaps?

3.) Are the returned voltages for the x, y and z directions or do I first need to convert from voltage to beam velocity then use the transformation matrix to get x, y and z? 

Thanks for the help,

Tim

Hi Jim,

1) You are right - that is the way to configure the Vectrino.

2) Your assumption is right you should get 0 volts = -0.3 m/s, 2.5 volts = 0 m/s, 5 volts =  0.3 m/s.

Since you are getting ~0V my guess would be that your ground reference is erroneous. Do you have the splash proof or the under water version. I can provide you with wiring diagrams to check if there is something wrong with the cable.

3) The coordinate system output is the one you configured in the Configuration editor

Best regards

Jonas Røstad

Thanks Jonas. I'm not sure if this answers your question about splash proof or underwater but I have an impulse connection. Let me know if you need more/different info.

Also, I forgot to ask about how to get the data quality parameters. Is that something the wiring diagram will answer? 

Tim

Hi Tim,

The data quality parameters aren't output over the analog voltages, you only get velocity data.

P.J.

Hi Tim,

Have a look at the wiring diagram attached

Please check that all lines are continued from one end to the other.

Best regards

Jonas Røstad