Frequently Asked Questions
In this FAQ section you will find short articles written by our support staff that can help you answer questions we often receive from our customers. The content can be accessed using the Search function. If you don't find answers to your question here, please send an e-mail to support@nortekgroup.com and we will get back to you as quickly as we can.
Principles of operation
- How to calculate instrument precision?
- What is blanking distance?
- Which assumptions are made when measuring currrents with an ADCP instruments?
- What are the different coordinate systems and how are they defined?
- Where can I find instrument software and firmware?
- Do you have any information about the Signature AHRS?
Instrument configuration
- What Echogram settings should I use for my measurements?
- What is multiplexing for my Signature instrument?
- What is the recommended deployment configuration for an AquaPro HR?
- How do I avoid interference from other acoustic instruments? Can it affect the marine life?
- Which application should I use for my Signature 500 measurements?
- Which application should I use for my Signature 1000 measurements?
Field deployment
- What should you be aware of when deploying your ADCP?
- What to be aware of when planning a deployment
- What should I take into consideration when deploying an AquaPro HR?
- Will starting the instrument in air harm the transducers?
- How do I calculate weight and buoyancy?
- How do I set the pressure offset on a Signature?
Data quality control and post-processing
- What are the steps to collect Echosounder data?
- How to estimate Suspended Sediment Concentration (SSC) using Nortek instruments?
- What is the Echosounder mode? How to use data from the Echosounder?
- Where are the depth cells positioned in Seareport?
- What are amplitude and correlation, and what do they tell us about data quality?
- Why does my data have low SNR?
Files and formats
Maintenance and troubleshooting
- How do I take care of my connectors?
- What should I check before I deploy my instrument?
- Deployment file issue
- How much current does my instrument draw?
- How much torque should I use on my endbell screws?
- What is the basic termination for RS232 and RS422 Nortek cables?
Tips and tricks
- Where can I find the Quick Guides?
- Where can I find information about the Eco?
- How can I increase my profiling range?
- How can I get my battery to last longer?
- How can I improve the precision of my measurements?
- How can I download data from my Signature?
System Integration
- What is the difference between the commands START and DEPLOY when starting my Signature?
- Do you have information about download time and maximum configurable baud rate for midlife instruments?
- How can I change the communication protocol from RS232 to RS422 on my midlife instrument?
- How can I change the communication protocol from RS232 to RS422 on my Signature?
- Why do I have extreme values in my Signature telemetry data?
- How do I set up the MOXA Uport converter for RS422 (for Signature)?
Vessel-mounted (Nortek VM)
Subsea Navigation
- I'm having problem with the Ethernet connection on my DVL, which steps should I take?
- What is the maximum sampling rate for current profiling and bottom track with a Nucleus?
- Nucleus integration with BlueROV2
- DVL Troubleshooting
- How do I collect 199 data and what is it?
- Does my DVL have current profiles enabled?
Velocimeters
- Does the Vectrino flag bad data?
- The Vectrino probe is not recognized. What is the problem?
- What does the accuracy specification mean?
- How do I set up analog output on and what do the values mean?
- How do I synchronize Vectrinos?
- How do you figure out the time to assign to Vector velocity samples?
AWAC VM
- Where can I find the AWAC VM user manual?
- How do I calibrate my vessel mounted AWAC?
- Where does the AWAC VM get time/date information from?
- Can I use my AWAC for moving boat application?
- How should I mount the VM system?
- Why do I see a high Vertical Velocity?