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Nortek VM Operations Manual

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NORTEK MANUALS
VM Operations version Manual
N3015-026500-O | v2.7.

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  • Page 1 NORTEK MANUALS VM Operations version Manual N3015-026500-O | v2.7.

  • Page 3: Table Of Contents

    Signature AD2CP Sensor ............... 12 Data acquisition system ................ 13 Ch. 4 Getting Started Checking the Inventory ................. 14 Signature VM Operations Software ............14 Processing unit ..................14 Connecting and configuring the parts ............ 14 4.4.1 Connecting the Signature Sensor ..............14 4.4.2...
  • Page 4 VM Operations version manual Ch. 6 Measuring ADCP Measuring Essentials ..............39 Software Configuration ................. 39 6.2.1 Save Configuration during Acquisition or during Playback ......44 Start measuring ..................44 Measuring and Display ................48 6.4.1 Status ......................48 6.4.2 Track display ....................

  • Page 5: Contents

    Ch. 11 Maintenance Signature Sensor ................... 89 11.1 11.2 Biofouling ....................89 11.2.1 Antifouling Paint and patches ............... 89 11.3 Instrument Care ..................90 11.4 Connector Care ..................90 Cable Care ..................... 90 11.5 © 2023 Nortek Netherlands B.V. v2.7.
  • Page 6 VM Operations version manual Ch. 12 Spectrum 12.1 Instructions ..................91 12.2 Options ....................91 12.3 Interaction .................... 92 Example spectra ..................92 12.4 12.5 Replaying a recorded spectrum ............. 93 Ch. 13 Troubleshooting 13.1 Remote Support through TeamViewer ........... 94 13.2...

  • Page 7: Introduction

    Introduction Introduction This manual is designed to help users of Signature VM Operations to get familiar with the VM Operations system and the accompanying VM Operations software A Signature sensor marked as ‘Signature VM’ (with bottom track firmware) cannot be programmed with the ‘Signature Deploy’...

  • Page 8: Health And Safety

    Data usage limitations The VM Operations system is not to be used for navigation or for any purpose relating to safety at sea. General Power Safety for the Junction Box, and Processing Unit model...
  • Page 9 (work-gloves, helmet, and if on-board, possibly lifejacket). · Ensure that nothing rests on your equipment's cables and that the cables are not located where they can be stepped on or tripped over. © 2023 Nortek Netherlands B.V. v2.7.

  • Page 10: Scope, Disclaimer, And Pending Changes

    This manual describes the Signature VM Operations product, and in particular the Signature VM Operations software. Please be aware that the Signature VM Operations version is part of a product family. Different products in this family use or can use different versions of the Signature VM sensor. The Signature VM Operations software is the latest addition to this family, and is intended for use with the Signature333 sensor.

  • Page 11: System Overview

    System Overview System Overview The VM Operations system is an integrated system with the purpose of accurately measuring vertical profiles of the water’s velocity and direction from a moving platform. Velocity of the water is measured using a Signature333 sensor. The Signature sensors are advanced four-beam current profiling systems.

  • Page 12: Signature Ad2Cp Sensor

    (Some early production models had an engraved marker, sometimes wrongly positioned.) For more general information on the Signature ADCP sensor series itself, please refer to the Signature Manual, as available on the Nortek group website: https://support.nortekgroup.com/hc/en-us/categories/360001447411-Manuals v2.7.

  • Page 13: Data Acquisition System

    Data acquisition system Figure 3: Signature VM Operations Processing Unit, version 4420 Data is collected using a processing unit running the ‘Signature VM Operations’ software. The VM Operations processing unit provides all necessary connections. The complete system is 19” 2HE rack mountable. It can be controlled using a local keyboard, mouse and monitor (not provided), or from a remote location over Ethernet using the front connector.

  • Page 14: Getting Started

    Note that only one ethernet port on the processing unit is configured to connect to the Signature VM Operations Interface (front). The system will not work if this is connected to the wrong port! The second ethernet port at the back of the PC may be connected to the local network and is only used to access the internet.

  • Page 15: Junction Box

    The junction box also supports serial output for the licensed Nortek proprietary bottom track format DF21 over serial (RS422). This optional serial output is intended to forward data to INS systems and is based on one way communication.

  • Page 16: Figure 5: Junction Box Dimensions. The Cable Connection Plate Differs With The Type Of Adcp

    VM Operations version manual Figure 5: Junction box dimensions. The cable connection plate differs with the type of ADCP sensor or set-up. Bottom left 333 kHz sea valve version, bottom middle standard 333 kHz version (without sea valve), bottom right VM Ocean/Operation series version (100 & 55 kHz) v2.7.

  • Page 17: Figure 6: Junction Box Schematic Drawing 4430-6001.01 Junction Box Signature Operations Without Sea Valve Assembly

    Getting Started Figure 6: Junction box schematic drawing 4430-6001.01 Junction Box Signature Operations without sea valve assembly © 2023 Nortek Netherlands B.V. v2.7.

  • Page 18: Figure 7: Junction Box Schematic Drawing 4430-6010.01 Junction Box Signature Operations Seavalve 333 Khz Unit With Sea Valve Assembly

    VM Operations version manual Figure 7: Junction box schematic drawing 4430-6010.01 Junction Box Signature Operations SeaValve 333 kHz unit with sea valve assembly v2.7. © 2023 Nortek Netherlands B.V.

  • Page 19: Figure 8: Junction Box Schematic Drawing 4430-6020.01 Junction Box Signature Ocean

    Getting Started Figure 8: Junction box schematic drawing 4430-6020.01 Junction Box Signature Ocean (100 and 55 kHz) without sea valve assembly © 2023 Nortek Netherlands B.V. v2.7.

  • Page 20: Serial Interface Configuration

    VM Operations version manual Serial interface configuration 4.4.3 To configure the interface, open the browser and enter the IP address. This will bring up a login screen (see figure 9). Figure 9: Login webpage of the MOXA serial interface subsystem The username is admin, the password is moxa Type the password in the password box, then click the login button.

  • Page 21: Network Settings

    ‘Operation Mode’ and ‘Delimiter’ for all ports at once by checking ‘Apply.. to all..’. But if you change settings that are only applicable to this specific port, you will have to Submit them first before moving to the next port. © 2023 Nortek Netherlands B.V. v2.7.

  • Page 22: Serial Settings

    VM Operations version manual Operation mode: UDP Mode. All data will be sent to the processing unit using the UDP protocol. Delimiter 1: a (Hex). Data on the serial ports usually comes in the form of ASCII text (NMEA messages). The serial interface stores these messages and sends them to the Signature VM processing unit after it receives the ‘Delimiter’...

  • Page 23: Figure 14: Settings In The Signature Vm Operations Software

    Getting Started Figure 14: Settings in the Signature VM Operations software The serial interface is connected to the ethernet port named ‘SurveyVM Interface’, and for the UDP protocol to work the address must be set to 0.0.0.0. The software can read NMEA compatible data from two different sources or ‘channels’ at the same time.

  • Page 24: Nmea Output

    VM Operations version manual Figure 16: Options for Primary and Secondary channel 4.4.3.4.2 NMEA Output To send data out over one of the serial ports, first make sure that ‘Use output channel’ is checked in the settings window (figure 17).

  • Page 25: Gnss Location And/Or Heading/Gyro Data Via A Network Connection

    For each of Clock source, Heading source, Navigation source, and Speed over ground source, select the appropriate source (channel) for that data · For Heading source, you can also select which type of NMEA sentence will provide the heading information (HDT, THS, or NTHPR) © 2023 Nortek Netherlands B.V. v2.7.

  • Page 26: Connecting To The Processing Unit

    Connecting to the Processing Unit 4.4.5 Though it is possible to connect to the Signature VM Operations Processing Unit using a keyboard, mouse and monitor, the general idea is to use a Remote Desktop connection from another computer (not supplied with the system).

  • Page 27: Figure 22: Configuring Windows For Use With The Remote Desktop Connection

    After this, close all the dialog windows via the appropriate “OK” or “Close” buttons. Now connect the client computer to the interface, and then open ‘Remote Desktop’ (Hit the ‘Windows’ key, and just type ‘remote desktop’). © 2023 Nortek Netherlands B.V. v2.7.

  • Page 28: Figure 23: Setting Up Remote Desktop

    VM Operations version manual Figure 23: Setting up Remote Desktop The address of the Signature VM Operations Processing Unit is fixed to 192.168.100.1. The username is ‘SurveyVM’. You can now click ‘Save As’ to save this connection for later (see figure 23).

  • Page 29: Figure 25: Desktop Theme Selection

    Getting Started Figure 25: Desktop theme selection © 2023 Nortek Netherlands B.V. v2.7.

  • Page 30: Operations Software

    Signature VM Operations software. (Note that the look of the VM Operations software can be selected from several themes. Figure 26 illustrates the "Nortekblue dark" theme. Most screenshots in this manual depict the "Nortekblue light"...

  • Page 31: Sub-Windows

    "Status panel " and "Status ". Map/track window Shows a map of the region, most recent and previous positions, and the average measured current for each position, see section "Track display ". © 2023 Nortek Netherlands B.V. v2.7.
  • Page 32 VM Operations version manual Sub-window indication + associated button Description Cross track current window Shows the magnitude of the component of the current perpendicular to the ship’s track, see section "Cross track current window ". Profile window Shows (in different tabs) the...

  • Page 33: Task/Button Bar

    "Buttons to show/hide the different windows "). The bottom-left set also contains the Configuration button at the top of the list, and a button at the bottom of the list to open the manual. © 2023 Nortek Netherlands B.V. v2.7.

  • Page 34: Connecting The Gnss

    Click ‘Connect’ to start the Nortek sensor. The address / serial number box will turn grey and the button text will change to ‘Disconnect’ and a ‘Start’ button will be available.

  • Page 35: Additional Options

    (You should not need to use this feature with the Operations version of the software.) The example above assumes only one Nortek sensor is connected to the network. If multiple sensors are connected it is important to know which sensor is in use. The ‘Discover’ option fills in the list of serial numbers of the instruments found, but the drop-down box only shows the first one of this list.

  • Page 36: Checking The Signature

    VM Operations version manual Figure 31: Special output options The DF21 and DF22 format are output on 115.2 KBaud. For a additional information on the DF21 and DF22 formats see the Integrator's Guide, N3015- 008_NortekDVL-IntegratorsGuide. Checking the Signature Once connected, click on ‘Web page’. This will open the internal web-interface page of the Signature Sensor (figure ).

  • Page 37: Status Panel

    Yellow. Table gives a bit more information on the different indicators and their meaning. For details of the status panel, other than these status indicator 'lights', see section Status © 2023 Nortek Netherlands B.V. v2.7.

  • Page 38: Table 4: Meaning Of The Colors Of The Status Indicators

    VM Operations version manual Table 4: Meaning of the colors of the status indicators YELLOW GREEN Position (GGA) No Data from 2D Fix (degraded 3D GNSS Fix GNSS accuracy) Heading (HDT) No Data Heading from internal gyro Heading from the Dual sensors.

  • Page 39: Measuring

    Following is a list of the most important issues that should be kept in mind when configuring the Signature VM Operations system. · Larger cells provide more range and have a better velocity precision. Always choose the largest cell possible for your application.

  • Page 40: Figure 34: Configuration Settings, Collapsed View

    VM Operations version manual between the collapsed and the expanded view. For a very brief explanation of any settings option, hover the mouse over it for a pop-up help balloon. Figure 34: Configuration settings, collapsed view The button “Restore factory defaults” will reset all settings to their defaults.

  • Page 41: Figure 35: Configuration Pop-Up Window

    Application Settings Display Units Metric Distance and speed on the screen in m/s or Knots and feet Theme Nortekblue dark Display theme, application colors, background and heatmap color palettes change with the selected theme. © 2023 Nortek Netherlands B.V. v2.7.
  • Page 42 VM Operations version manual Setting Default Description Layout Default Change between saved layouts or save the current layout. Max Recording length 1 hr (01:00:00) Maximum length of a single recording. If left blank everything recorded single continuous file. Else it is split in files of the specified length.
  • Page 43 Processing Settings Amplitude Limit (blank) Any measured cell where the amplitude is lower than this limit is discarded. If left blank, no limit is applied. Average Interval [s] Measurements are averaged over this interval. © 2023 Nortek Netherlands B.V. v2.7.

  • Page 44: Save Configuration During Acquisition Or During Playback

    VM Operations version manual Setting Default Description Correlation limit [%] Any measured cell where the correlation is lower than this limit is discarded. If left blank, no limit is applied. FOM threshold 1000 Any measured cell where the FOM (figure of merit) is higher than this limit is discarded.

  • Page 45: Figure 36: Start Measurement Pop-Up Window

    When entering new values in the edit boxes they are automatically checked (when leaving the box), and if a setting is not compatible with the connected sensor the edit box will be marked red and the ‘Start’ button will be disabled. © 2023 Nortek Netherlands B.V. v2.7.

  • Page 46: Table 6: Measurement Settings For The Signature Vm Instrument

    VM Operations version manual Table 6: Measurement settings for the Signature VM instrument Setting 1 Default 2,3 Description Environment Salinity / Sound Velocity 35 / 1500 Note that when using the concave Signature VM 333 kHz you have to enter 0 ppt for the salinity.

  • Page 47: Figure 37: Deployment Details

    These details can be inspected or saved to file and used as a basis for constructing custom deployment files. Creating and using custom deployment files is an advanced feature. Please refer to the ‘Nortek Signature Integrators Guide’ for details.

  • Page 48: Measuring And Display

    VM Operations version manual Measuring and Display Status 6.4.1 The status panel shows a set of panels with various metrics for insight in the status of the connected instruments and the data recorded. Figure 39: Status panel overview The different parameters are (in figure 39, clockwise from top right):...

  • Page 49: Figure 40: Hover Over A Sub-Panel To Show Its Values In The Center Panel And Show An Explanatory Pop-Up Balloon

    Note that if you do not move the mouse the pop-up will stay visible for a short time only; if you move the mouse away from the text “Measurement settings” the pop-up will disappear immediately. © 2023 Nortek Netherlands B.V. v2.7.

  • Page 50: Figure 42: Hover Over "Measurement Settings" For A List Of Details

    VM Operations version manual Figure 42: Hover over "Measurement settings" for a list of details The values related to the water velocity (Current and STW) are averaged over the full water column by default. The selected layer can change this behavior.

  • Page 51: Track Display

    (indicating “on”) is the same as the corresponding feature as drawn on the map. £ The other items have a regular toggle box ( ), see table for details on each option. © 2023 Nortek Netherlands B.V. v2.7.

  • Page 52: User Defined Background Map

    VM Operations version manual Table 8: Map display options Options Description GNSS Show the track as recorded by the GNSS positions. Heading line Show a straight line that marks the heading according to the GNSS compass. Altimeter Show the depth value at regular intervals.

  • Page 53: Keyboard Shortcuts

    <Tab> and Arrow Keys Move between settings. Use Spacebar to toggle checkboxes <Ctrl>-R Reset bottom track. Re-Align the bottom track with the vessel position on the Map Zoom in on the Map Zoom out on the Map <Ctrl> Arrow Keys Pan the Map © 2023 Nortek Netherlands B.V. v2.7.

  • Page 54: Adding Notes

    VM Operations version manual Adding Notes Figure 46: Adding notes When measuring, it is possible to add notes. Notes will be tagged automatically with the time and position and are stored in the data file. To add a note, click the ‘Pencil’ icon. This will open the notes window where you can enter text in the lower part.

  • Page 55: Error Messages

    This indicates that there is no PTP (Precision Time Protocol) signal present. This signal should come from the GNSS, so this either may not be connected yet, or the GNSS has not locked into any satellites and therefore has not found the correct time. © 2023 Nortek Netherlands B.V. v2.7.

  • Page 56: Offsets

    VM Operations version manual Offsets Before starting the actual measurement, it is important to align all sensors. The configuration contains two sub-sections for entering the offsets between the sensor and the GNSS relative to the vessel. All calibration factors can still be changed in post processing without further consequences.

  • Page 57: Horizontal And Vertical Offsets

    . This way there is no need to enter X and Y offsets. If, however this is not possible, X Y and Z offsets may have © 2023 Nortek Netherlands B.V. v2.7.

  • Page 58: Figure 52: Offsets From The Gnss To The Signature

    VM Operations version manual to be entered like in the example below (figure ) where the GNSS is mounted on the roof of the vessel. When entering X, Y and Z offsets it is important to start from deciding what is the actual reference point.

  • Page 59: Offsets Diagram

    GNSS direction to compute the valid orientation of the Signature instrument. For instructions on how to manually set the orientation of the Signature and GNSS, please refer to section Manual alignment procedure © 2023 Nortek Netherlands B.V. v2.7.

  • Page 60: Figure 54: Automatic Alignment

    VM Operations version manual Figure 54: Automatic alignment To be able to automatically align the instruments you need to be measuring and both bottomtrack and GNSS data should be available. Ideally you sail a straight line for a few hundred meters and then press the 'Auto align Signature' button. The Signature orientation will automatically be set to the correct value and the bottomtrack will reset.

  • Page 61: Manual Alignment Procedure

    ) this is not the case. This also shows up very clearly in the track plot (figure ). The blue line shows the track according to the GNSS, the red line according to the bottom tracking. © 2023 Nortek Netherlands B.V. v2.7.

  • Page 62: Figure 57: Aligning For Bottom Track

    VM Operations version manual It’s clear that the bottom track direction is about 45 degrees off, which is due to the 45 degrees offset of the Signature sensor. To correct for this, open ‘Configuration’ and adjust ‘Orientation’ for the Signature mounting, in this case to -45 degrees.

  • Page 63: Data Output

    An asterisk (*) delimiter and checksum value follow the last field of data contained in an NMEA- 0183 message. details calculation checksum, see, e.g., https://en.wikipedia.org/wiki/NMEA_0183. (Note that the official NMEA 0183 Interface Standard document is a copyrighted document; see https://www.nmea.org/nmea-0183.html.) © 2023 Nortek Netherlands B.V. v2.7.

  • Page 64: Ad2Cp Format

    AD2CP format The AD2CP data format is a binary format developed by Nortek. Details of the format can be found in the “Integrator’s Guide – Signature” https://support.nortekgroup.com/hc/en-us/articles/360029513952-Integrators-Guide-Signature The AD2CP format is enhanced with optional IEC61162-450-timetagged NMEA navigation information.

  • Page 65: Output Destinations

    UDP sends its messages whether they are received or not (and does not attempt resending). There are two distinct ways to use the UDP output: © 2023 Nortek Netherlands B.V. v2.7.

  • Page 66: Data Rates

    VM Operations version manual UDP Broadcast – in this case the UDP packets are delivered to any pc on the network. This can cause an unwanted and unnecessary amount of network traffic as the data packets are also delivered to computers on the network that are not interested in it.

  • Page 67: Nmea Message Details

    E or W The letter ‘E’ or ‘W’ for East or West Quality GPS Quality Indicator Nr Of Satellites Number of satellites in view, 00 - 12 HDOP Horizontal Dilution of precision (meters) dd.d © 2023 Nortek Netherlands B.V. v2.7.

  • Page 68: Sdvtg - Track Made Good And Ground Speed

    VM Operations version manual Field Description Data Format Altitude Antenna Altitude above/below mean-sea-level dd.dd (geoid) (in meters) Units of antenna altitude, Meters Separation Geoidal separation, the difference between the dd.dd WGS-84 earth ellipsoid and mean-sea-level (geoid), "-" means mean-sea-level below...

  • Page 69: Vdvbw - Dual Gound / Water Speed

    $VDVHW – Vessel through water Speed and Direction The VHW sentence contains the speed and direction of the vessel relative to the water. By default this is the vessel speed relative to the water speed averaged over the full water column, © 2023 Nortek Netherlands B.V. v2.7.

  • Page 70: Proprietary Nmea Sentences

    Kilometers Proprietary NMEA sentences 8.4.2 The following messages are a subset of the messages as used by the Nortek DVL (Doppler Velocity Log), but the ‘Tagged NMEA’ versions are not supported (e.g. $PNRTS2,DATE=083013,TIME=132455,EC=0, SC-34000034…). By default the NMEA messages are sent with the $PNRT prefix, these messages are compliant with the NMEA IEC61162-1 standard.
  • Page 71 $P---CV – Velocity data per Cell Field Description Data format Date Date and Time in UTC MMDDYY Time 0-24H, 0.01 second resolution Hhmmss.ss Cell Number Cell Position Distance from sensor to centre of the cell[m] dd.dd © 2023 Nortek Netherlands B.V. v2.7.
  • Page 72 VM Operations version manual Field Description Data format Velocity East [m/s] dd.ddd Velocity North [m/s] dd.ddd Velocity Up [m/s] dd.ddd Velocity Up2 [m/s] dd.ddd Speed [m/s] dd.ddd Direction [degrees] ddd.dd Amplitude Units D=dB Amplitude Beam 1 [dB] ddd.d Amplitude Beam 2 [dB] ddd.d...
  • Page 73 Figure Of Merit Beam1 ddddd FOM2 Figure Of Merit Beam2 ddddd FOM3 Figure Of Merit Beam3 ddddd FOM4 Figure Of Merit Beam4 ddddd Quality Status: String with status letters: G, M or D or -: © 2023 Nortek Netherlands B.V. v2.7.
  • Page 74 VM Operations version manual (G)ood, (D)egraded, (M)issing or '-' for not enabled. Example: GGDGGM-G Character nr Measurement Source Position GNSS Heading GNSS Speed over Ground GNSS Time GNSS Heading Pitch Roll GNSS Bottom track Signature (G or M) Velocity Signature velocity Burst...

  • Page 75: Compliant Nmea

    ($PNRT); deselect this tickbox ("no") to use the historical mnemonic code ($PNOR), for compatibility (but note that this code is not registered to Nortek, hence using this code is not compliant; see also section "Proprietary NMEA sentences " for details,...

  • Page 76: Windows For Operational Use

    VM Operations version manual Windows for Operational use Buttons to show/hide the different windows Figure 62: Lower left of the task/button bar Figure 62 shows the buttons at the lower left side of the button bar, that control visibility of the different windows.

  • Page 77: Cross Track Current Window

    The cursor readout shows the cross track current at the location along the track of the ship that the mouse hovers over. · The dot indicating the cross track current value at the selected distance back along the track of the ship changes colour from yellow to blue © 2023 Nortek Netherlands B.V. v2.7.

  • Page 78: Figure 65: Layer For Cross Track Current

    VM Operations version manual · The current value that shows in the top axis is the value that corresponds to the cursor location, not the cross track current value at the selected distance. (On-screen you can see this better, as a vertical line goes through the cursor position and ends at that value.

  • Page 79: Profile Window

    Figure 66 shows the Profile window. The details this window shows depend on the tab you select. Figure 67 shows a small impression of each of the tabs. The following subsections describe each tab in more detail. Figure 67: The different tabs of the Profile window © 2023 Nortek Netherlands B.V. v2.7.

  • Page 80: Current Profile Tab

    VM Operations version manual Current Profile tab 9.3.1 Figure 68: Details of the Current Profile tab The Current Profile tab is the most complicated and richest of the tabs in the Profile window. The central plot shows the magnitude of the current (or current component) versus depth, normally omitting the last 10%.

  • Page 81: Buttons

    These buttons allow you to select which component of the current to show in the plot: East, North, or Up, or the full current magnitude (ignoring direction). Show Up component Show current magnitude (selected) © 2023 Nortek Netherlands B.V. v2.7.

  • Page 82: Layer Adjustment

    VM Operations version manual 9.3.1.2 Layer adjustment You can adjust the boundary between two layers by clicking and dragging the dotted line that indicates this boundary. The number in the label box to the right shows the depth of this line.

  • Page 83: Amplitude Tab

    Adjusting the colour scale also works the same as in the Current Profile tab; for details see table in section "Buttons ". The amplitude values can ascertain the quality of the sensor measurements. Amplitude values above 35 dB generally give trustworthy results. © 2023 Nortek Netherlands B.V. v2.7.

  • Page 84: Correlation Tab

    VM Operations version manual Correlation tab 9.3.3 Figure 72: Details of the Correlation tab The Correlation tab shows the correlation values for each of the transducers of the Signature VM sensor, as a function of depth. The colour scale indicates the correlation values as a percentage.

  • Page 85: Current Profile 3D Tab

    East- and North components, and its depth. Figure 74 shows an example. Figure 74: Cursor read-out and current vector component and depth projections when hovering close to a current vector endpoint © 2023 Nortek Netherlands B.V. v2.7.

  • Page 86: History Window

    VM Operations version manual History window Figure 75: The History window The History window shows recent values of current magnitude, averaged over the water column or selected layer (yellow dots), and direction (blue dots), as a function of time, progressing from the left-hand side.

  • Page 87: Installation

    Ship-induced motion is usually a bigger problem when the relative water depth is smaller, and the ship is larger or bulkier (less "classic" hull structure). It is usually not a significant problem on small vessels or for Signature sensors mounted over the side. © 2023 Nortek Netherlands B.V. v2.7.

  • Page 88: Ship Generated Flow Fields

    VM Operations version manual The tilt angle of the installation should be as small as possible because a level sensor head makes it easier to interpret and analyse the velocity data. However, a few degrees of tilt do not make a great difference in the accuracy of the horizontal velocity data.

  • Page 89: Maintenance

    These consumables can be purchased via the Nortekgroup web shop. The patches double the standard cleaning interval and a diver can quickly clean the patches from marine growth. At order Nortek offers the option to coat the instrument with a permanent antifouling solution, please inquire at Nortek Netherlands for more information.

  • Page 90: Instrument Care

    VM Operations version manual 11.3 Instrument Care All Nortek instruments are intended for use in water. Other fluids may have an adverse effect on the plastic materials used. For prolonged storage at elevated temperatures close to the specified limit, or when temperature variation is uncertain, it is recommended that the screws securing the end cap be loosened in order to minimize the risk of any deformation due to temperature/stress over time.

  • Page 91: Spectrum

    12.1 Instructions In order to be able to record a spectrum, a Signature instrument should be connected. Steps: 1. Open the VM Operations software 2. Turn on the Diagnostics mode by clicking on the stethoscope icon Connect your Signature instrument 4.

  • Page 92: Interaction

    VM Operations version manual 12.3 Interaction The spectrum is shown in two different plots. The bottom heatmap shows the spectrum over a period of time, the top line plot shows a instant spectrum for the time selected using the horizontal line in the bottom heatmap. The horizontal line can be moved (by means of the time- label on the right-hand side) to show the detailed line spectrum at a different point of time.

  • Page 93: Replaying A Recorded Spectrum

    Single, or multiple narrow peaks are a sign of noise pollution. 12.5 Replaying a recorded spectrum A spectrum is recorded in a file with the .VMdiag extension. The VM Operations software can replay this file just like .SigVM files.

  • Page 94: Troubleshooting

    13.1 Remote Support through TeamViewer In general, every Signature VM computer comes with TeamViewer software. This allows the user to give a Nortek support engineer access to the computer so he or she can check what might be wrong with your software configuration.

  • Page 95: Processing Unit Configuration

    Processing Unit configuration Processing Unit configuration Figure 81: Configuration of the ethernet connections on the VM Operations Processing Unit Two Ethernet ports are available on the back of the Processing Unit. One is named ‘Ethernet’ and is a general-purpose port that may be used to connect to the ship network.

  • Page 96: Figure 83: Changing The Firewall Rule For Remote Desktop

    VM Operations version manual Figure 83: Changing the firewall rule for Remote Desktop From now on, anybody on the main network can also access the remote desktop. v2.7. © 2023 Nortek Netherlands B.V.

  • Page 97: Glossary

    A value giving the degree of closeness of a velocity measurement to the actual velocity. Refer to the data sheet for specific minimum accuracy. AD2CP Nortek's broadband signal processing platform. AHRS Attitude and Heading Reference System. Provides attitude information and replaces the traditional tilt and magnetometer. AHRS is especially useful in dynamic environments.
  • Page 98 Firmware Internal software of the instrument, as opposed to the instrument software running on a PC. New firmware is posted on the Nortek site. You will need to register to get access, but access is otherwise free of charge.
  • Page 99 X-axis and the second (middle) finger to point in the direction of positive Y. The positive Z- axis will then be in the direction that the thumb points. © 2023 Nortek Netherlands B.V. v2.7.
  • Page 100 Figures Figure 1: Nortek VM Operations schematic system diagram of processing unit, with IP addresses ..11 Figure 2: Signature333 Transducers and sensors ................12 Figure 3: Signature VM Operations Processing Unit, version 4420 ........... 13 Figure 4: Greasing the connector ....................14 Figure 5: Junction box dimensions.
  • Page 101 Figure 79: Recording a spectrum ....................91 Figure 80: Starting the TeamViewer session ................. 94 Figure 81: Configuration of the ethernet connections on the VM Operations Processing Unit ....95 Figure 82: Firewall settings for Remote Desktop ................95 Figure 83: Changing the firewall rule for Remote Desktop .............. 96 Tables Table 1: Revision history - Manual N3015-026500-O ...............

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