An optional co-locating plate (part number 650-0156) allows a DVL and SPRINT/Lodestar to be mated and pre-calibrated prior to mobilising offshore. If needed, the same calibrated DVL and SPRINT/Lodestar can be uncoupled, used independently and then re-connected and still be considered calibrated such is the precision of the Sonardyne co-locating arrangement.
Acoustic interference will vary depending on the equipment that is fitted on the vehicle. Acoustic transmissions of similar frequencies can cause interference with the DVL operation. The best way to manage interference is to time pulses from interfering devices either synchronously or asynchronously. From experience it is recommended to trigger asynchronously to prevent devices from acoustically interfering with one another.
The maximum seabed slope on which bottom lock can be attained is highly dependent upon a number of different factors. Some examples include height difference between ranges (amplified difference if slope is steep and altitude on some beams is very low and others are high) and also backscatter properties based on incidence angle of the acoustic pulse on the sea floor.
An example statistic would be that at 10 m altitude, Syrinx will be able to track steep slopes of up to 75°. At very shallow altitude (1-2 m) the DVL would be able to track on a slope of 45°.
A command can be used to set the speed of sound within the DVL, which will then scale all measurements using this value. It is also possible for the DVL to output measurements using a fixed SV value, and the measurements can later be scaled in external navigation software.
Contact [email protected] for more information.
Yes.
Syrinx can be triggered from a rising or falling edge. This can be configured either through the configuration software or via command line. The trigger needs to be 3-12 V and able to drive at least 5 mA.
If set incorrectly, the RT 6-6000’s release mechanism can become damaged; it might fail to open or sinker weights may fail prematurely when lifted off the back deck. Use the following method to ensure the release is set correctly and safely.
There is a hole in the lever arm of the release and another in the side plate. Insert a 4mm Allen key into the lever arm hole. Make sure the supplied stainless steel shackle is situated and push the Allen key towards the body of the RT 6-6000 to move the lever arm into place. We only use the best quality shackles; cheaper alternatives are available, but using these can put your equipment at risk.
Keeping pressure on the Allen key, insert a screwdriver in the side plate hole, across the top of the lever arm and out of the other side plate. You can now relax and remove the Allen key as the screwdriver will keep the lever arm in place.
Using 6G Terminal Lite software or an iWand, ‘Arm’ and then ‘Close’ the release. The motorised cam will close, locking the lever arm in place.
Once this is complete, remove the screwdriver, attach the weights to the shackle and your release is set.
Contact [email protected] for more information.
10 Hz or 10 pings per second, water depth allowing. In deeper water, ping rates may be reduced due to allow for acoustic propagation time.
Minimum velocity measurements are <1mm/s in X, Y and Z (or beam) velocities when using the Sonardyne proprietary telegram. This increases to 1 mm/s when using PD4/PD5 telegrams.
Maximum velocity measurement capability is 10 m/s.
The maximum operating altitude is up to 140 m, depending on seabed composition, acoustic noise and sedimentation in the water column.
The minimum operating altitude is 0.5 m. Below this altitude the velocity errors begin to grow very large but velocity estimates can still be made to around 0.3 m.
Mounting the DVL as high as possible on the vehicle while maintaining line of the sight for all 4 beams allows for the best results in very low altitude scenarios.
Yes. To keep your ROVNav 6+ performing as it should, you should clean, inspect and lubricate the bulkhead connector. This is what the manufacturer recommends:
AGP Connector mating surfaces should be cleaned to remove contamination and silicone build up then inspected and re-lubricated. This should be performed prior to each mating and before storage to insure correct mating as well as prolonged connector life. Connectors must also be mated and unmated correctly to ensure a proper seal and to prevent connector damage or degradation.
- Clean the connector using the manufacturer’s recommended “3M Silicone Spray, ECG RX2200 or Dow Corning DC200” only.
- Apply lubricant and carefully and thoroughly clean the connector, locking ring and locking ring threads using a non-abrasive towel (it is not recommended to insert anything into pin or socket cavities).
- After cleaning, thoroughly inspect the connector and locking ring and look for:
– Cuts or abrasion to sealing surfaces (face of connector, overmold and pin cavities).
– Bent or broken pins and sockets.
– Deformation of the shoulder (the back of the metal locking ring presses against this shoulder to ensure connector faces mate tightly together).
– Damaged threads, rust or corrosion on locking rings. - Lubricate the connector surfaces using 3M Silicone Spray, ECG RX2200 or Dow Corning DC200.
- Apply a light machine oil or dielectric anti-seize to lubricate only the threaded portion of the stainless steel locking rings.
- Mating of locking rings should be done by hand only (do not use a wrench or pliers to tighten locking rings).
- Ensure this is no gap between the two face seals before thoroughly hand tightening the locking rings (by hand (the locking rings can be pulled back from the connector to allow a better view).
- Do not bend or twist connectors while mating or un-mating as this will damage the connector pins and sockets. Pull or push straight across the connectors. Anchor cable with foot and pull straight up if possible.
Note: do not use Contact Cleaner, WD40, CRC, DC111 or any other solvents or heavy silicone grease to clean or lubricate AGP connectors. Doing so may cause connector damage, improper mating/sealing and shortened connector life.
More information can be found in Product Catalogs on the manufacturers website.