CTD-N Technical Manual
P/N 95F-6000-00 (February 2017)
page 51
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
3. Open CTDPro.
4. Select the Autolog feature from the Advanced Settings dialog box.
5. Close the dialog box.
6. Choose the ‘Sample Rate’ and the ‘Average Time’ in the Settings dialog box.
7. Close the dialog box.
8. Close CTDPro.
9. Disconnect the communications cable from the instrument.
10. Leave the communications port of the instrument empty or, to ensure a clean port, plug it
with a dummy plug (i.e., a plug that breaks the battery connection to the instrument).
11. Wait until it is time to deploy the instrument. This can be days, months, or years.
12. Plug the communications port of the instrument with a plug that makes the connection be-
tween the battery and the instrument (i.e. shorting plug). The instrument boots up into run
mode, thus Autolog feature is activated.
13. Deploy the instrument.
14. After 30 seconds in water of 1mS/cm or greater, the instrument will start to log to a new
file.
15. Wait to recover the instrument.
16. Recover the instrument (i.e., pull it out of the water).
17. After 30 seconds out of the water, the instrument will automatically stop logging to the file,
save the file and close the file. Confirm that water has flushed out of the conductivity cell,
otherwise, the instrument may still be logging.
The file will be lost if power is removed
before the file is closed!
To ensure that the data file has been saved and closed properly,
wait more than thirty seconds after removing the NXIC CTD from the water before discon-
necting the shorting plug (i.e., disconnecting power to the instrument). In fact, it is advisa-
ble to wait a couple of minutes to ensure that the file closes. Similarly, wait more than 30
seconds before redeployment, or else a new file will not be created, and logging will con-
tinue on the same file.
18. Disconnect the shorting plug.
19. If the user wants to download the data, then go to step 22.
20. Plug the communications port with a dummy plug (i.e., a plug that breaks the battery con-
nection to the instrument) until the next deployment is desired.
21. Go back to step 11.
22. Connect the communications cable from the computer to the instrument. External power
can be connected to save battery power.
23. Open CTDPro.
