Valeport MIDAS SVX2 Скачать руководство пользователя страница 22 | Manualshive

Страница: 22 / 23

Valeport MIDAS SVX2 Скачать руководство пользователя страница 22

Section 6 | Frequently Asked Questions

©

2022

–

Valeport Ltd

Page | 20

How fast can I profile?

The profiler runs at 8Hz, and in free fall will achieve a drop rate of perhaps 2m/s. Falling at this
rate, it will cover 0.25m between readings, so provided the profile is set to take a reading at a
greater increment than this, it will function correctly.

The SV Sensor Outputs Zero Sometimes

–

Why Is That?

The sensor outputs zero when it doesn’t record the returning sound pulse within the expected time

frame (a time frame that equates to 1400

–

1600m/s in terms of sound velocity). The most

common occurrence of a zero value is when the sensor is in air, but it can also happen if the probe
has been dropped into a soft bed and is covered in mud or sediment. This will normally wash off
during the up-cast. It can also happen if the sensor has been deployed for some time without
cleaning, and there is significant growth on the sensor.

«
...
20
21
22
23
»

Содержание MIDAS SVX2

Страница 1: ...cument must not be copied reprinted or reproduced in any material form either wholly or in part and the contents of this document and any method or technique available there from must not be disclosed...

Страница 2: ...2 4 2 Based on Batteries 8 3 Installation 10 3 1 Communications With a PC 10 3 2 Deploying the MIDAS SVX2 10 3 2 1 Real Time Operation 10 3 2 2 Self Recording Operation 11 3 2 3 LED Flashing Sequence...

Страница 3: ...ntenance tools and spare o rings DataLog x2 Software CD Operating Manual Transit case In addition the following components may be supplied as optional extras RS485 communications adapter FSK modem com...

Страница 4: ...olution 0 001m s 2 1 2 Conductivity Type Valeport inductive coils Range 0 80mS cm Accuracy 0 01mS cm Resolution 0 002mS cm 2 1 3 Pressure Type Temperature Compensated Piezo Resistive Sensor Range 600B...

Страница 5: ...8mm 665mm long including connector Cage 825mm long x 140mm x 120mm Weight in cage 13 5kg in air 9kg in water Depth Rating 6000m unless smaller pressure sensor fitted 2 2 2 Connectors Instrument 10 pin...

Страница 6: ...Section 2 Specifications 2022 Valeport Ltd Page 4 2 2 3 Dimensions...

Страница 7: ...le in 16Mb steps to 64Mb Internal Power 8 x 1 5v alkaline C cells The unit will accept 8 x 3 6v Lithium C cells with no alterations required Do not mix battery types External Power Between 9 and 30v D...

Страница 8: ...8Hz Memory used per second is 10 x 8 bytes 80 bytes Total memory fitted is 16 777 216 bytes Seconds before memory full is 16 777 216 80 approx 209 700 seconds This is equivalent to 58 hours This perio...

Страница 9: ...o do it after every profile to get the memory card out All memory cards are susceptible to ESD shock static electricity while being handled We take the view that the value of your data means it should...

Страница 10: ...95 efficient total available charge 6 8Ah Continuous Data Sampling 8Hz At 12v the instrument draws 60mA when sampling Total charge available is 5 850mAh Number of hours available is therefore 5850mAh...

Страница 11: ...he risk could be overcome by adding an air vent to the housing but this could compromise the water tight nature of the housing Better to remove the risk altogether Secondly the most commonly used rech...

Страница 12: ...ect 15 pin D type and 4mm plugs from Y lead into adapter Connect 9 pin D type from adapter to PC and 4mm plugs from adapter to external power as indicated on adapter housing FSK 0400005 Connect 4mm pl...

Страница 13: ...l power and apply higher voltage Continuous ON for 2 seconds Indicates the start of Burst Sampling pattern 5 Rapid Flashes Indicates the end of Burst Sampling pattern The duration of the burst may be...

Страница 14: ...ge transducer face or reflector plate of the sound velocity sensor and paying particular attention to the core of the conductivity sensor A high pressure water jet or stiff not metal brush is suitable...

Страница 15: ...ging Batteries The MIDAS SVX2 accepts 8 x C cells of either 1 5v alkaline or 3 6v Lithium type These cells are arranged in series so the output voltage is 12v alkaline or 28 8v Lithium Some example sc...

Страница 16: ...the instrument should lie at the long end of the cage 4 1 1 Removing the End Cap Safely There is a small chance that pressure can build up inside the instrument housing To remove the end cap safely R...

Страница 17: ...t of its groove under high pressure Whilst this may not immediately cause a leak it can damage the o ring to the extent that it will not properly seal on subsequent deployments Where an AE ring is fit...

Страница 18: ...10 2 NC 3 NC 4 NC 5 NC 6 NC 7 NC 8 NC 9 NC 10 Link to Pin 1 5 2 3m Y Lead RS232 10 Way Male SubConn 1m Power Cable 4mm Banana Plugs 9 Way D Type Function 1 BLUE BLACK Power Ground 2 BROWN RED Power V...

Страница 19: ...m Switched Y Lead RS485 10 Way Male SubConn SWITCH BOX 1m White Cable 4mm Banana Plugs 15 Way D Type 9 Way D Type Function 1 BLUE BLACK Power Ground 2 BROWN RED Power V 3 9 RS485 A 4 10 RS485 B 5 11 6...

Страница 20: ...calibrate it against Chen Millero No we don t that would defeat the purpose While the seawater formulae Chen Millero Del Grosso etc have inherent errors that are accepted as being at best 0 25m s we u...

Страница 21: ...stable Since the entire timing system is digital it is not subject to the drift that analogue components often exhibit over time The only part of the system that can drift with time is the timing crys...

Страница 22: ...uts Zero Sometimes Why Is That The sensor outputs zero when it doesn t record the returning sound pulse within the expected time frame a time frame that equates to 1400 1600m s in terms of sound veloc...

Страница 23: ...supplied that are not authorised by Valeport Ltd could void the CE compliance of the product and negate your authority to operate it This product has demonstrated CE compliance under conditions that...

Отзывы:

Нет отзывов