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Introduction

This section describes how to fit the Direct Drive retro-fit, and includes a list of all components and tools required for this process.

Contents

1. Dismounting the Radar Sensor

Follow this procedure for dismounting the radar when a replacement is required.

  1. Disconnect the radar 24VDC power supply in the junction box.

  2. Remove the cables at the radar itself; twist each connector anti-clockwise, in turn.
    CAUTION: Ensure you are twisting the connector and not the cable gland on the back of the connector.

  3. Remove the bolts holding the radar to the radar bracket.

  4. Carefully lift the radar clear of the bracket.
    IMPORTANT: Take care not to alter the position of the lower mounting nuts. This will ensure that the radar will return to its previously commissioned position when re-mounted.
    Failure to do this could mean radar will not perform as expected and may require re-commissioning.

  5. Protect the ends of the power and data cables to prevent water getting inside them whilst disconnected from the radar.
    CARE POINT: The radar sensor weighs approximately 6Kg, so please take all necessary precautions when lifting.

2. Replacing the Drive Assembly

In order to carry out the tasks outlined within this section, you will need to break the environmental seal of the radar sensor and expose various internal components. For this reason you need to remove the sensor from its mounting (as outlined earlier in this guide) and take it to a clean, dust free, anti-static work area.

The kit required to service the CTS-series radar sensors is available from Navtech Radar.

Please contact customer support with your radar model and serial number to obtain the correct kit.

CAUTION: This kit contains high powered magnets in the Rotor Assembly. Please refer to the Health & Safety sheet regarding magnet safety -https://www.magnetexpert.com/health-and-safety-i934

Required Sub-Assemblies and Parts

1 x SUB0299 Dual 55 Assembly

1 x SUB0269 Motor board Assembly

1 x SUB0268 Rotor Assembly

1 x BOA0099 DD Retro-Fit Board

1 x WIR0094 Motor Cable

4 x SCR0094 M4x10 Skt Ctsk Screw

5 x SCR0067 M4x12 Skt Cap Screw

5 x SCR0063 M6x12 Skt Cap Screw

2 x SCR0162 M6x16 Skt Cap Screw

Tools

2.5mm hex key

3mm hex key

5mm hex key

10mm spanner

T20 Torx® key

Torque driver for hex and Torx keys

14mm spanner (for pressure gauge)

16mm spanner

Servisol® grease

Loctite® 243 - to be used with all screws except the Radome screws

Soft dry brush

Pressure test kit (Navtech order code: NAV0128)

Hand or foot pump with Schrader fitting

Anti-static surface and wrist strap

Latex (or equivalent) protective gloves

2.1 Open the Enclosure

  1. If the radar unit has not already been disconnected, isolate the power supply and then remove the power, data and earth connections.

  2. Using a 16mm spanner, remove the small breather valve located just to the left of the connectors. A replacement breather valve is supplied in the service kit.

  3. Using a pen, make a small mark across the side of the radome and the chassis to indicate the correct orientation.

  4. Using a T20 Torx® driver, loosen the six bolts that secure the radome to the chassis (replacement bolts and washers are supplied in the service kit).

  5. Once all bolts are equally slack, remove them all fully.

  6. You can now lift off the radome. You may need to gently twist the radome to break the seal with the o-ring.               

2.2 Remove the Upper Assembly

  1. Turn the rotating dish assembly in order to provide clear access to the small retaining bolts.

  2. Using a 3mm hex key (do not use ball ended drivers), loosen the four small retaining bolts and remove the fifth locking bolt. The bolts are secured with Loctite 243 and will be resistant to movement.

  3. When all bolts have been loosened off and the locking bolt completely released, rotate and carefully lift off the upper assembly from the turntable.

    CARE POINT: Inspect the metal dish or plastic lens on the rotating assembly for dirt and debris. Clean any debris away using a soft dry brush.

2.3 Remove the Drive Assembly

  1. Carefully unclip and disconnect the multi coloured motor ribbon cable (A) from its edge connector on the main board. Note how the cable is routed so that the new motor cable can be routed in the same fashion on reassembly.  
     

                            

  2. Using a 5mm hex key (do not use a ball-ended driver) and a 10mm spanner to hold the pillars from loosening, undo and remove the five bolts that secure the motor assembly. These bolts can be discarded.
    NOTE: The bolts will be stiff to undo due to being assembled with Loctite 243 at the factory.
    CARE POINT: Check the 3 pillars have not been loosened.

  3. Carefully lift the complete drive assembly up slightly from the chassis to provide access to the encoder connection.

  4. Carefully un-clip and disconnect the encoder cable (B) from its edge connector on the main board. Ensure to grip on the latching pin at the top before pulling gently in a vertical motion.
    NOTE: Take care when removing this connector. If necessary, disconnect the adjacent Ethernet cable first to provide better access to the retaining clip of the encoder connector.

  5. You can now remove the old drive assembly from the chassis and return it to Navtech Radar (using the packaging supplied with the replacement unit).

CARE POINTS:

  • Perform a full visual check of the interior of the chassis.

  • Ensure that no dirt or debris is present within the enclosure and pay particular attention to the plastic lens on the fixed optical stack in the radar base.

  • Clean any debris away using a soft dry brush.

2.4 Remove the Maxon Motor Board

  1. Remove the Maxon Motor Board from the main board in the base.

  2. Return the old motor board to Navtech Radar with the old drive assembly.

2.5 Strip Down Retro-Fit Assembly to Component Parts

  1. Remove the new Direct Drive Motor Assembly from the packaging and check for damage.

  2. Remove and discard the 3 bolts securing the Rotor Assembly.

  3. Place the Rotor back into the foam tray supplied with the replacement Direct Drive Assembly.

  4. Take care not to place the Rotor Assembly near any metal which may dislodge the magnets, or metal fragments which may get stuck to the magnets and cause abnormal behaviour.

  5. Contact Navtech if any magnet is dislodged, to ensure correct polarity.

  6. Remove and discard the 4 x M4 screws securing the Motor Board using a M2.5mm allen key.

  7. Check the Motor Board speed is set to 4Hz then place the Motor Board into the ESD protective bag.

Switch 1

Switch 2

Switch 3

Switch 4

Speed (Hz)

OFF

OFF

ON

OFF

4

CARE POINT: Take care when handling the Motor Board to avoid damage.

2.6 Daughter Board & Motor Cable Fitting 

  1. Fit Daughter Board (BOA0099) to the Digital Board ensuring fully inserted and correctly positioned with no pins overlapping.

  2. Check this is a tight fit, not loose.

  3. Fit 1 x Motor Cable (WIR0094) to the Daughter Board ensuring it is fully inserted.

    CARE POINT: If this is ever disconnected then check the crimps stay fully inserted in the connector.

2.7 Fitting the Drive Assembly

CARE POINTS:

  • Check the lens at the top of the Beam Splitter is clean.

  • Ensure the 3 pillars are fully screwed down.

  • Take care not to trap the Motor Cable when fitting the Dual 55 Assembly or dislodge the Conical Baffle.

  1. Connect the Encoder Cable from the Drive Assembly (SUB0299) to the main board.

  2. If the old drive assembly had 2 spacers underneath the front 2 bolts, then these will need to be re-fitted with the Drive Assembly using 2 x M6x16mm Skt Cap Screws (SCR0162) with Loctite 243, then use 3 x M6x12mm Skt Cap Screws (SCR0063) with Loctite 243 on the 3 pillars.

  3. If there are no spacers under the old drive assembly, then use 5 x M6x12mm Skt Cap Screws (SCR0063) with Loctite 243 to secure the Drive Assembly with a 5mm hex allen key.

2.8 Fitting the Motor Board

  1. Connect the other end of the Motor Cable to J4 on the Motor Board (SUB0269).
    CARE POINT: If this is ever disconnected then check the crimps stay fully inserted in the connector.

  2. With the radar connections facing towards you, set the Motor Board into position on the 4 pillars of the Drive Assembly with the Motor Cable tucked inside the Casting and with the board speed dip switches set in the 9 o’clock position as shown below.

  3. Secure with 4 x M4x10mm Skt Ctsk Screws (SCR0094) with Loctite 243. Take care when tightening these 4 screws; they need to be nipped up but not overtightened using a 2.5mm hex bit, Torque=60±5cNm.
    CARE POINTS:

  • Ensure the 4 screws are not overtightened to avoid breaking the clamp ring.

  • Check the Motor Sub Assembly is secure to the 4 pillars with no free movement of the board.

 

2.9 Rotor Assembly Fitting

CARE POINTS:

  • The Rotor is fitted with strong magnets and should not be handled in a dirty environment where it may pick up metallic debris at any time, either loose or in an assembly.

  • Check that the 2 x Flux Rings are aligned concentrically on reverse side.

  • Check each magnet is located correctly in it's pocket in the Rotor and has not been disturbed.

  • Observe caution when handling the magnets. Please refer to the Health & Safety sheet before handling: https://www.magnetexpert.com/health-and-safety-i934

  1.  Aligning the 2 dowel pins (circled in pink below), position 1 x Rotor Assembly (SUB0268) with the magnets facing down onto the Dual 55 Assembly.

2.10 Fit the New Drive Assembly

  1. Set 1 x Rotating Assembly onto the dowels and secure with 5 x M4x12mm Skt Cap (SCR0067) with Loctite 243.

  2. Tighten in sequence as shown below. This is to ensure the rotor sits flat.

  3. Check the rotating assembly spins freely with a visible gap between the motor board coil clamp and the rotor, with nothing touching.

2.11 Replace the Radome

  1. Lower the Radome onto the body of the radar unit, ensuring that the o-ring remains fully within its recess.

  2. As you do so, align the pen marks for radome orientation and also ensure the bolt holes coincide with those in the chassis (rotating the radome once fitted is difficult).

  3. Insert the six new bolts and washers from the service kit and using a T20 Torx® driver, tighten the bolts to a torque of between 140 and 160 cNm.

  4. If cracks are seen running down from the Radome mount holes then before the Radome is fitted, then the area should be cleaned with IPA or an equivalent.

  5. Then the provided Radome stickers can be applied to support the area around the mount holes. This should prevent the cracks extending further while also improving the cosmetic look of the Radome.

2.12 Pressure Test the Enclosure

NOTE: The power and data connector with its cap on, are hermetically sealed on this radar model and so if fitted will form a gas-tight seal.

  1. Insert the pressure test gauge into the hole vacated by the pressure plug and tighten it to form an airtight seal with the enclosure.

  2. Attach a hand or foot pump to the Schrader valve of the pressure test gauge and pressurise the enclosure to approximately 1 psi.

  3. Remove the pump from the pressure test gauge and allow the gauge to settle.

  4. After 5 minutes check the gauge. The pressure should remain at or around 1 psi. If the pressure has dropped by more than 10 to 15%, then the test has failed and your options are to either locate and correct the cause of the leak or return the enclosure to Navtech Radar for a wet pressure test. IMPORTANT: Do not put a radar unit that has failed the dry pressure test back into service, as water ingress could damage the radar.

  5. If this dry pressure test is successful, remove the pressure test gauge and place the new breather valve, supplied in the service kit, into the hole. Use a 16mm spanner to lightly tighten to a torque of between 0.6 and 0.8Nm - do not over tighten.

  6. Apply two new warranty stickers to bridge the join between the Radome and the chassis:

  7. The radar unit is ready for operation and can be returned to its mounting position.

  8. To fully complete the service procedure, you need to register the service date within the radar sensor. Please see the section 3.2 - Setting the service date and checking vital signs for details.

3. Confirming Sensor Operation

In order to test the output of the radar sensor, you will require:

  • A portable computer running Windows 10 or later

  • The SPx RadarView application (which can be obtained from the ‘tools’ folder on the supplied RPU)

  • A CAT 5, 5e or 6 network cable (straight or crossover wiring)

3.1 Preparing & Connecting Your Computer

IMPORTANT: Ensure that your computer has its IP address set to operate within the same subnet as the Radar Sensor.

  • The IP address of the radar sensor is preset before leaving Navtech Radar Limited to a default value of 192.168.0.1 unless otherwise specified by the client.

  • The subnet mask of the radar sensor is often preset to 255.255.255.0 but could also be set wider (such as 255.255.0.0) if requested.

  • Thus, if the sensor IP address is 192.168.0.1 and the mask is 255.255.255.0, then your computer must use an IP address in the range: 192.168.0.2 to 192.168.0.254.

NOTE: If you are connecting to the radar via an Ethernet switch rather than making a direct link, it is important that no other radar client software, such as Bloodhound, is already connected before using radar view.

For further details about preparing a computer, please see 3.1.1 - Preparing a computer to link with a radar sensor.

Connecting Your Computer

You can connect your computer at any point along the signal link from the radar sensor, either directly into the sensor mounted socket; at the pole mounted enclosure (if the signal link is joined there) or at the far end of the link where it will join the RPU (Radar Processing Unit) system. 

NOTE: The sensor can be powered on or off while connecting and disconnecting the network link.

The network controller within the radar sensor is autosensing so that you can use either straight through or crossover cables and it will adjust its operation accordingly.

  1. Connect a link cable between your computer and the network port, either on the sensor or elsewhere along the signal path.

  2. Ensure that the radar sensor is powered on and is rotating.

3.1.1 Preparing a Computer to Link with a Radar Sensor

Setting the IP address in Windows 7

  1. Click the Windows Start button.

  2. Select Control Panel > Network and Internet > Network and Sharing Centre > Change Adapter settings:

  3. Right click Local Area Connection and select Properties.

  4. Highlight Internet Protocol Version (TCP/IPv4), and then click the Properties button.

  5. Set the IP address:

    For example, if the radar IP address is 192.168.0.1 then set laptop to 192.168.0.10 or higher. Click Subnet mask to automatically set to 255.255.255.0. Leave Default Gateway blank. Click OK.

  6. Close the window.

3.2 Setting the Service Date & Checking Vital Signs

The CTS350-X radar sensor has a built in web interface (known as Vertex) which provides default user level access to the radar. This means you can view information but no changes can be made. There is a useful summary of key radar setup and diagnostic information – e.g. IP address, serial number, System Uptime and Radar health (temperature and rotation).

To use the Vertex Interface

  1. On the computer that is linked to the sensor, open a suitable web browser: Internet Explorer (v10 or above) or Chrome.

  2. Type in the address of the sensor in the format http://192.168.0.1 and press return. This will redirect you to a secure http (https) connection. Accept any security warnings – these are raised because the browser does not recognise the certificate from the radar.

  3. To avoid seeing this warning every time you connect, save the IP address of the radar in the secure/trusted sites zone of your browser (although the certificate is regenerated every time the radar reboots). You should now see the Vertex interface opening page:

Within the basic view (when not logged in to the sensor), Vertex provides four main pages, accessible from the four buttons in the top left corner:

Status: Displays basic static settings (i.e. auto-hostname, serial number, IP address, etc.) plus dynamic graphs (arranged on two tabs in the lower portion of the page) that provide Temperature and Rotation details.

System Information: Provides three pages of detailed settings under the sub headings of System, Radar and Advanced. Click the System Information option to reveal the three sub-headings.

Log Viewer: A full list of all sensor activities. Viewing is possible while not logged- in, however, you must log in if you wish to download the record.

Radar Data: Allows you to view the live radar data.

Two other buttons are shown in green at the top right corner of the page:

Report: Click on this option to display a configuration summary report that details all of the key sensor settings.

Login: Click on this option to login so that changes can be made to the service date. See setting the service date below for details.

Using the Log Viewer

The radar stores a record of activities in order to assist diagnostics. Due to memory restrictions, newer entries will overwrite the oldest and so the log does not retain all historical information.

  1. Enter the number of records that you wish to view and click Go.

  2. The requested number of log entries will be displayed with the most recent at the top of the page:

  3. The numbering starts from the latest entry and work backwards in time.

Viewing Radar Data

  1. Click on the Radar Data button to view live radar data:

Setting the Service Date

Following a service procedure you need to register the service date within the radar sensor.

  1. In order to do this, you first need to login to Vertex.

  2. Access the Vertex interface as discussed earlier in this section.

  3. Click the Login button in the top right hand corner of the screen.

  4. Enter the correct Username and Password. By default these are:
    Username: user                   (all lower case)
    Password: Navtech.             (including the capital ‘N’ and the full stop)

  5. Click Login or press Return. This level of access allows basic configuration changes and log downloads.

  6. Click on the Factory > Radar Hardware button on the left side to display the following page:

  7. In the Service Date option, enter the next date the sensor is due a service and then click the blue Apply button in the lower right corner.

  8. Click the green Commit Changes button to save the settings to the sensor memory.

  9. A message will be displayed when this action has been carried out.

  10. Click the red Action button at the top of the page.

  11. Click the Reboot option to restart the radar sensor.

3.3 Testing Radar Operation using SPx RadarView

The SPx RadarView application consists of two files which must be located in the same folder (any folder) on your computer: SPXRadarView.exe and SPXRadarView.cpv.

The default .cpv file should be adequate to endure the radar is operating correctly.

To make a recording or for detailed site analysis a radar specific .cpv file may be required.

To use SPx RadarView

  1. Run SPXRadarView.exe. You should see a blank main screen:

    Note: In the lower panel, the Video and Turn indicators will be red to indicate that there is no communication with the sensor.

  2. Click the Channel-A menu and select the Source... option.

  3. Ensure that the Selection option is set to Network and in the section below, enter the IP Address of the sensor.

  4. The Port must be set to 6317.

  5. Click OK.

  6. Once the IP address and port are correctly set and the application makes contact with the sensor, the Video and Turn indicators should turn green. Shortly after, you should begin to see radar scan information within the main window:

  7.  If you see a response similar to that shown here, then you can be assured that the sensor is functioning correctly and can be remounted on its post and returned to service.

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